Half of B2B software buyers now start vendor research in ChatGPT or Perplexity before they open a browser tab, according to G2’s 2025 Buyer Behavior Report. For UK SaaS and tech startups, that shift has changed what “search visibility” actually means. Being on page one of Google no longer guarantees you appear on the shortlist a decision-maker receives from an AI tool. That shortlist is assembled separately, from a different pool of signals.
Generative Engine Optimisation (GEO) and Answer Engine Optimisation (AEO) are the practices that close this gap. GEO builds the off-site brand signals AI uses to decide who to cite. AEO structures on-site content so AI platforms can extract and reuse it directly as answers.
The problem for most UK B2B marketing leaders is that the market is now flooded with agencies SEO agencies for B2B & SaaS claiming GEO capability. When Conductor’s State of AEO/GEO 2026 report found that 94% of CMOs plan to increase GEO investment, every SEO shop started updating their service page. We reviewed more than 30 UK agencies against the same standard: a published, named methodology, verified case studies with specific metrics, and evidence of multi-platform tracking beyond a landing page. Nine made this list.
Top 3 at a Glance
| Agency | Best For | Starting Price |
| GrowPad | Seed–Series B B2B SaaS, full LLMO + GEO + AEO in one strategy | £2,500+/mo |
| MarGen | B2B regulated sectors, pure-play GEO/AEO from day one | £2,500+/mo |
| The SEO Works | SMEs to mid-market B2B tech, multi-region UK, enterprise SEO + GEO | £5,000+/mo |
How We Evaluated These Agencies
We reviewed 30+ UK SEO agencies for B2B & SaaS. Agencies were removed if they: had no named GEO or AEO methodology distinct from standard SEO, showed no verifiable case study with specific AI-search metrics, had fewer than five third-party reviews, or simply relabelled an existing SEO retainer as “AI-first” in 2024.
The six criteria we weighted were:
- Published GEO/AEO methodology — a named framework, not just a landing page claim
- Verifiable case studies — specific metric, named or confidentially described client, direct link
- Multi-platform tracking — coverage across ChatGPT, Perplexity, Gemini, Google AI Overviews, and Claude
- B2B / SaaS specialism — understanding of complex buying cycles, long sales processes, product-led funnels
- Review depth and recency — Clutch or G2 rating with review activity in 2025–2026
- Awards, partner status, or industry recognition — Google Partner tiers, Search Awards shortlists, Clutch Top badges
The 9 Best GEO and AEO Agencies for B2B SaaS and Tech Startups in the UK
Here are the nine best GEO/AEO agencies for B2B & SaaS in the UK that earned a place on this list:
- GrowPad
- MarGen
- The SEO Works
- UltraScout AI
- Blue Array
- Rise at Seven
- Passion Digital
- Impression
- ClickSlice
Full Comparison Table
| Agency | Best For | Starting Price | Key Industries | Rating | Key Differentiator |
| GrowPad | Seed–Series B B2B SaaS, full-stack AI search | £2,500+/mo | SaaS, fintech, B2B tech, e-learning, IoT | 5.0★ Clutch (38 reviews) | LLMO + GEO + AEO + SEO in one system; 4 Clutch Top badges 2026 |
| MarGen | B2B regulated sectors, pure GEO/AEO | £2,500+/mo | SaaS, financial services, legal, healthcare, construction | Not on Clutch | #1 UK AI SEO agency 2026 (Digital Agency Leaders); Synaptic Authority Engine |
| The SEO Works | SMEs–mid-market B2B tech, multi-region UK | £5,000+/mo | B2B tech, ecommerce, SaaS | 5.0★ Clutch (57 reviews) | Google Premier Partner; Universal Information Infrastructure GEO methodology |
| UltraScout AI | Enterprise SaaS, deep LLM technical optimisation | £5,000+/mo | Enterprise SaaS, B2B, ecommerce | Not on Clutch | Principal Data Scientist-led; AI Influence Score™ proprietary analytics |
| Blue Array | Large organisations, in-house SEO enablement | £5,000+/mo | B2B finance, enterprise, ecommerce | 4.2 Trustpilot (83 reviews) | B Corp; self-described first UK agency to offer GEO; “consulgency” model |
| Rise at Seven | B2B brands needing AI citations via digital PR | £3,000+/mo | B2B SaaS, ecommerce, automotive, travel | Not publicly listed | Digital PR-driven: earned media accounts for 80% of AI citations |
| Passion Digital | B2B and professional services, Seed to Series A | £2,000+/mo | B2B, professional services, finance, travel | 33 Clutch reviews | Google Premier Partner 2023–2026; acquired by Pixis.ai 2025; 5 named AI search sub-services |
| Impression | B2B SaaS, fintech, integrated performance + GEO | £3,000+/mo | B2B, SaaS, fintech, ecommerce | Not recently active on Clutch | Campaign Performance Marketing Agency of the Year 2025; Alexis + Velocity proprietary tools |
| ClickSlice | SaaS lead gen, fast-moving brands, no lock-in | £3,000+/mo | SaaS, ecommerce, B2B services | 5.0★ Clutch (5 reviews) | SEO Agency of the Year UK 2025; ranks #1 for “SEO agency London”; month-to-month terms |
Agency Profiles
1. GrowPad — Best SEO Agency For B2B & SaaS Needing LLMO, GEO, and AEO in One Strategy
GrowPad is an inbound growth SEO agency built exclusively for SaaS and B2B tech companies. When we reviewed the agency’s positioning during our analysis, the clearest distinction from others on this list is structural: GrowPad does not treat GEO, AEO, and LLMO as add-ons to an existing SEO retainer. They are built into the core engagement model from day one.
Every link placement goes through a three-point validation before it goes live: domain relevance, traffic quality, and editorial standards. GrowPad focuses on one vertical at a time until it dominates. That approach is how they document a 73% first-page ranking rate within 90 days on revenue-driving pages, alongside measurable LLM citation tracking across ChatGPT, Perplexity, Gemini, and Google AI Overviews.
Industries: SaaS, B2B tech, fintech, e-learning, healthcare software, IoT
Core Services:
- LLMO (Large Language Model Optimisation) — tracking and building citations across all major AI platforms
- GEO (Generative Engine Optimisation) — off-site brand signals and entity authority for AI recommendation
- AEO (Answer Engine Optimisation) — structured on-site content for direct AI extraction
- SEO strategy and technical implementation
- SaaS link building & Digidal PR with pre-validated placements
- Standalone AI Search Audit (entry-point engagement)
Client-Fit Profile: GrowPad works with B2B SaaS and tech companies from pre-seed through Series B, with typical client ARR from $500K to $20M. They operate in English across the US, UK, and Europe. Pain points addressed: zero presence in AI search results despite ranking on Google; organic traffic that does not convert to demos; stagnating MQL pipelines.
Awards & Status: GrowPad holds four Clutch distinctions for 2026: Top SEO Company — Information Technology, Top SEO Company — SaaS, Top SEO Company — Spain, and Top Link Building Company — Spain. The Clutch profile shows 38 verified reviews at 5.0 stars with review activity dated 2026. The entire review pool is SEO, GEO, and link building — no unrelated services diluting the focus split.
Verified Case Study — NetHunt CRM (SaaS): NetHunt is a SaaS CRM used by sales and marketing teams worldwide. After a Google Core Update damaged rankings in 2023, organic traffic was no longer generating SQLs. GrowPad rebuilt the SEO and content strategy around high-intent revenue-driving queries. In six months, priority pages moved from the top 20 into the top 5 for queries such as “CRM for Google Workspace,” and the result was a +25% increase in SQLs. Anna Pozniak, Head of Marketing at NetHunt, described the partnership: “They were proactive, pushed us to move faster, and within six months we saw stronger rankings and more SQLs from organic search.”
Pricing: $50–99/hour; Starting from £2,500+/month for UK startups.
Our Take: GrowPad is the strongest pick on this list for B2B SaaS and tech companies that want AI search and traditional search treated as one strategy from day one, not stitched together after the fact. The 5.0★ Clutch rating across 38 verified, recent reviews, the four 2026 Top badges, and the documented LLMO tracking across five AI platforms place it ahead of most UK-serving alternatives in this category.
Best for: B2B SaaS at $500K–$20M ARR needing organic pipeline from both Google and AI search simultaneously.
Not ideal for: Teams wanting a hands-off, passive vendor relationship; companies outside SaaS/B2B tech.
→Get a free AI Search Audit from GrowPad
2. MarGen — Best for B2B Regulated Sectors Needing Pure-Play GEO/AEO
MarGen is a Sheffield-based GEO and AEO agency built from the ground up for AI search, with no legacy SEO operation underneath it. Founded by Leeroy Powell, MarGen was ranked the UK’s #1 AI SEO agency for 2026 by Digital Agency Leaders — one of two Sheffield companies in the top three. That ranking was based on four weighted criteria: articulated GEO/AEO methodology, credentials and demonstrable results, ability to grow AI and traditional search visibility, and genuine UK market focus.
The differentiator we identified during our research is the Synaptic Authority Engine — MarGen’s proprietary sequential framework spanning entity mapping, third-party trust signals, answer-first content architecture, and a citation signal stack, monitored continuously across ChatGPT, Perplexity, Google AI Overviews, and Claude. First AI citations typically appear within four to eight weeks of engagement.
Industries: B2B SaaS, financial services, legal and professional services, healthcare and biotech, construction, high-ticket ecommerce
Core Services:
- GEO and AEO delivered as a unified programme (not separate retainers)
- Entity optimisation and knowledge graph management
- Answer-first content architecture
- Structured data implementation (FAQPage, HowTo, Speakable)
- Primary source citation strategy (FCA data, SRA guidance, NHS statistics, RICS research for regulated sectors)
- Free AI Visibility Score (entry-point diagnostic)
Client-Fit Profile: MarGen is the strongest fit for B2B companies in regulated sectors where generic GEO content will not move trust signals — financial services, legal, healthcare, construction, and B2B SaaS where compliance and expert authorship are buyer expectations. The agency operates month-to-month with no lock-in contracts. UK market focus is explicit.
Awards & Status: Ranked #1 by Digital Agency Leaders July 2026. No public Clutch listing found during our research — ask directly for client references before committing.
Verified Case Study: MarGen’s case study documentation describes a B2B regulated-sector engagement in financial services where structured GEO and AEO work, grounded in FCA data, produced measurable AI citation improvements. Specific client names and metrics are not published — a common pattern in regulated sectors due to client confidentiality requirements.
Pricing: £2,500+/month. Month-to-month contracts. Free AI Visibility Score available as a starting point.
Our Take: MarGen earns its position for UK B2B companies in regulated or compliance-heavy sectors where most GEO agencies cannot go deep enough. The Synaptic Authority Engine is documented and named, not just a landing page claim. The absence of Clutch reviews is the primary gap for buyers who need platform-verified social proof.
Best for: UK B2B regulated-sector brands (financial services, legal, healthcare, construction, SaaS with compliance requirements) needing genuine GEO/AEO expertise.
Not ideal for: Companies wanting a large, verified Clutch review trail before signing; non-regulated B2B sectors where a more generalist GEO agency would suffice.
3. The SEO Works — Best for UK SMEs to Mid-Market B2B Tech Wanting Enterprise SEO + Dedicated GEO
The SEO Works is a Sheffield-founded agency with offices in London, Leeds, Manchester, and Birmingham. Founded in 2009, it holds Google Premier Partner status and a 5.0★ Clutch rating across 57 verified reviews — the strongest independently confirmed review record on this list. During our research, the agency was ranked #2 in the UK for AI SEO by Digital Agency Leaders in July 2026, one slot behind MarGen.
The SEO Works runs GEO and AEO as separate named service lines alongside traditional SEO — not as a bundled add-on. Their methodology for GEO is built around their proprietary Universal Information Infrastructure framework, which clarifies brand entities, product positioning, and category associations so AI platforms represent B2B brands correctly in generated answers. The agency also offers a free LLM audit as an entry-point diagnostic.
Industries: B2B tech, ecommerce, SaaS, enterprise, professional services
Core Services:
- Enterprise SEO (technical, content, link building)
- GEO (Generative Engine Optimisation) with Universal Information Infrastructure methodology
- AEO (Answer Engine Optimisation) as a named service line
- AI Search integration across ChatGPT, Perplexity, Gemini, and Google AI Overviews
- Free LLM audit
Client-Fit Profile: The SEO Works serves 128+ businesses across SME through enterprise. Their multi-office UK presence (Sheffield, London, Leeds, Manchester, Birmingham) makes them one of the few companies on this list with genuine regional depth. Typical clients are mid-market UK B2B technology companies wanting integrated SEO and GEO under one team. Pain points addressed: fragmented SEO and AI-search visibility, multi-region ranking challenges, and AI citations going to competitors.
Awards & Status: Google Premier Partner. Named Clutch Global Top 1000 company. Won Integrated Search Agency of the Year at the Global Agency Awards, Integrated Digital Agency of the Year at the UK Digital Excellence Awards, and Performance Agency of the Year at the Campaign Awards. Multiple European Search Awards recognitions.
Verified Case Study: The SEO Works documents B2B GEO work on their site, with the Universal Information Infrastructure methodology producing structured comparison content, alternatives pages, and clear use-case mapping for B2B brands. Named specific cases connecting GEO visibility to leads and pipeline are available on request — their published work index covers B2B, SaaS, and technology verticals.
Pricing: £5,000+/month. Entry retainers from approximately $3,000/month based on independent 2026 roundup data.
Our Take: The SEO Works is one of the best-credentialed agencies on this list: 57 Clutch reviews at 5.0 stars, Google Premier Partner, multiple agency-of-the-year awards, and a published GEO methodology with a named framework. For UK B2B tech companies wanting a single agency for both traditional search and AI search across multiple UK regions, this is one of the strongest starting points.
Best for: UK SMEs to mid-market B2B tech companies wanting multi-region SEO and dedicated GEO/AEO from a well-credentialed, award-winning team.
Not ideal for: Very early-stage startups with minimal content or authority foundations; companies wanting GEO as the sole deliverable without traditional SEO context.
4. UltraScout AI — Best for Enterprise B2B SaaS Needing Deep LLM Technical Expertise
UltraScout AI is a UK remote-first agency and SaaS platform built from the ground up for AI search visibility. The agency was founded by Yuliya Halavachova, a Principal Data Scientist with 16+ years of LLM engineering experience. When we assessed this during our research, that background is the key differentiator: UltraScout is the only agency on this list built and led by someone who has worked inside large language models at a technical level, not alongside them.
The agency’s proprietary analytics stack includes the AI Influence Score™, Intent Weighting methodology, and a Stability Index. These frameworks track not just whether a brand is cited, but how stably and in what context — across ChatGPT, Perplexity, Gemini, Claude, and Copilot. UltraScout also operates a SaaS platform that competes with Profound AI and BrightEdge, offering multi-platform tracking infrastructure for enterprise brands and agencies.
Industries: Enterprise SaaS, B2B, ecommerce, professional services
Core Services:
- GEO and AEO strategy and implementation
- Entity Authority and Knowledge Graph management
- AI Influence Score™ analytics and tracking
- LLM Readiness Audits
- AI Agent and Autonomous SEO
- API-first documentation optimisation
Client-Fit Profile: UltraScout serves enterprise and mid-market companies where LLM technical depth matters — complex products, multi-category architectures, or industries where AI retrieval is competitive. Pricing at the £5,000+/month tier reflects an enterprise service model. No public Clutch rating found during our research.
Verified Case Study: UltraScout’s documented case study covers a UK-based B2B SaaS platform (name confidential) that had zero visibility in ChatGPT and Perplexity for category-leading queries. After entity authority reinforcement, information-gain content architecture, and API-first documentation work, the platform achieved an 85% inclusion rate for target queries and 40% share of voice in AI responses. The client and exact timeline are not publicly named.
Pricing: £5,000+/month (custom scope). Entry-point via free AI Profile available on their platform.
Our Take: UltraScout AI earns its place for enterprise SaaS companies that need LLM engineering depth rather than content strategy layered on top of SEO. The Principal Data Scientist founding, the proprietary AI Influence Score™ analytics, and the multi-platform tracking infrastructure are real differentiators. The absence of a Clutch profile and the reliance on their own guide to establish their ranking are gaps to verify directly.
Best for: Enterprise B2B SaaS and technology companies needing deep LLM technical architecture and proprietary AI visibility analytics.
Not ideal for: Seed or Series A startups with limited budget; companies wanting an agency with a large, independently verified review trail.
5. Blue Array — Best for Large Organisations Embedding GEO Into In-House SEO Teams
Blue Array is a Reading-based SEO and GEO agency that describes its own model as a “consulgency” — blending boutique consultant attention with agency-level scale. Blue Array holds Certified B Corp status and describes itself as the UK’s largest specialist organic search agency. According to their B Corp listing, they were the first UK agency to offer GEO as a formal service. Their emphasis during our analysis was on AI governance, embedded GEO team models, and in-house SEO enablement at enterprise scale.
The agency’s Trustpilot profile shows 4.2/5 across 83 reviews — a broader social proof signal than their Clutch presence (2 reviews). Named work includes financial challengers, consumer brands, and enterprise companies undergoing website migrations.
Industries: B2B financial services, enterprise ecommerce, consumer brands, professional services
Core Services:
- Strategic SEO and GEO for B2B financial challenger brands
- Embedded GEO teams for in-house SEO enablement
- AI governance and GEO audits
- Technical SEO support (migrations, algorithm updates, international growth)
- Digital PR
Client-Fit Profile: Blue Array is best suited to large organisations that want GEO embedded alongside an existing or developing in-house SEO function, rather than fully outsourced. The “consulgency” model reflects a hybrid of strategic consulting and hands-on execution. They explicitly target B2B financial challengers and enterprise brands.
Verified Case Study: Blue Array partnered with iwoca, a UK fintech B2B lender, to build sustainable non-branded SEO visibility for high-intent business loan queries in a competitive market. The goal was to reduce reliance on short-term government loan schemes and grow long-term organic presence. Specific traffic or citation metrics are detailed on their success stories page.
Pricing: £5,000+/month (custom). Contact for scope-specific quote.
Our Take: Blue Array earns its spot for enterprise brands that want GEO embedded into a broader in-house SEO programme rather than bolt-on. The B Corp certification, the “first UK GEO agency” positioning, and the 83 Trustpilot reviews are all credible signals. The Clutch presence is thin — for buyers who rely on platform-verified social proof, ask for direct references.
Best for: Large organisations and enterprise brands wanting to embed GEO capability into their in-house team or alongside an existing SEO function.
Not ideal for: Early-stage startups or growth-stage SaaS teams; companies wanting a fully managed GEO retainer without an existing SEO foundation.
6. Rise at Seven — Best for B2B Brands Building AI Citations Through Digital PR
Rise at Seven is a search-first content marketing agency founded in Sheffield in 2019 by Carrie Rose and Stephen Kenwright, now with offices in Manchester, London, and New York. The agency’s GEO positioning is distinctive on this list: rather than starting from content architecture, Rise at Seven builds AI citations primarily through earned media. Their rationale, backed by research they cite, is that earned media accounts for 80% of AI citations.
When we reviewed their 236-campaign analysis during our research, the B2B results stood out: B2B campaigns in their library saw an average 138% uplift in top rankings. The agency has integrated GEO monitoring — tracking brand mentions, AI citations, and frequency of appearance in AI-generated answers — alongside their core digital PR and SEO programmes.
Industries: B2B SaaS, ecommerce, automotive, travel, retail
Core Services:
- AI Visibility & GEO (monitoring across ChatGPT, Gemini, Perplexity, and Claude)
- Digital PR (reactive newsjacking, data-led campaigns, media outreach)
- Search and growth strategy
- Content experience and SEO
- Social media and social search
Client-Fit Profile: Rise at Seven serves B2B brands where content authority and earned media are the growth lever. Their model suits companies that already have reasonable organic foundations and need their brand cited by AI platforms through third-party editorial mentions. Pain points addressed: brand invisible in AI answers despite existing Google visibility; need for AI citation via earned authority rather than on-site restructuring alone.
Verified Case Study — Dojo (B2B, card machines): When Dojo launched as a new B2B card machine brand with zero monthly searches for their name, Rise at Seven built brand authority entirely from scratch through digital PR and newsjacking. In 12 months, they drove 241 links and 435 pieces of coverage from publications including CNET, Daily Mail, and LadBible. Sessions grew from 8,220 in the first month to 29,974 nine months later — a 264% increase.
Pricing: £3,000+/month.
Our Take: Rise at Seven is the best pick on this list for B2B brands whose AI citation gap is primarily an earned-media problem rather than a content-architecture problem. Their track record across 236+ campaigns, the 138% average B2B ranking uplift, and the Dojo case study all hold up under scrutiny. The GEO monitoring capability is real and integrated into their programme rather than a separate add-on.
Best for: B2B brands needing AI citation built through digital PR, media authority, and earned mentions — not just on-site content restructuring.
Not ideal for: Companies needing pure technical GEO or LLM entity work; startups with no brand presence or content foundation.
7. Passion Digital — Best for B2B and Professional Services Brands at Seed to Series A
Passion Digital is a Holborn-based digital marketing agency founded in 2012. In 2025, the agency was acquired by Pixis.ai, a US AI infrastructure company, and joined the Stellar AI-native global agency network. That acquisition has meaningfully accelerated their AI search capability — giving the 30-person team access to proprietary AI forecasting, real-time optimisation tooling, and automated content infrastructure that most boutique agencies cannot build independently.
Passion Digital holds Google Premier Partner status for four consecutive years (2023–2026), placing them in the top 3% of agencies globally. During our research, they were the only agency on this list offering five specifically named AI Search sub-services: GEO, AIO (AI Overview) Optimisation, Deep Research (DRX), LLM Performance Tracking, and Entity Optimisation — packaged as a structured AI search offering rather than a general “we do AI” claim.
Industries: B2B, professional services, travel, finance, charities, ecommerce
Core Services:
- GEO (Generative Engine Optimisation)
- AIO Optimisation (Google AI Overview visibility)
- Deep Research tooling (DRX) — proprietary
- LLM Performance Tracking
- Entity Optimisation
- Paid media (Google Ads, LinkedIn Ads, Meta Ads)
- SEO and digital PR
Client-Fit Profile: Passion Digital works across B2B and professional services brands from seed-stage to established enterprise. Named clients include Nutanix, Knight Frank, Octopus Investments, OneTrust, Moore Kingston Smith, and Mazda. They serve the UK market primarily, with some international coverage via the Stellar network. Pain points addressed: disconnected paid and organic programmes; need for GEO integrated alongside mature paid media rather than in a separate silo.
Awards & Status: Google Premier Partner 2023–2026 (top 3% globally). UK Digital Growth Awards 2024 winner. UK Paid Media Awards 2024 winner. The Drum Awards 2024. Two 2026 Performance Marketing Awards finalist places. Shortlisted for UK Search Awards 2024 for B2B SEO work with Nutanix.
Verified Case Study — Nutanix (B2B cloud software): For over four years, Passion Digital ran SEO for Nutanix across five EMEA markets — UK, France, Germany, Italy, and Spain. The programme focused on top-position rankings for priority keywords in an intensely competitive B2B enterprise landscape, including targeting SERP features to strengthen CTR. The engagement was shortlisted for Best Use of Search – B2B SEO at the UK Search Awards 2024.
Pricing: £2,000+/month. The Tilio UK GEO agency guide notes published pricing tiers from £450/month (GEO Visibility Boost) to £10,000+/month (GEO Market Leader).
Our Take: Passion Digital is the best pick on this list for Seed-to-Series A B2B and professional services companies that want GEO embedded alongside a mature paid and SEO programme, with the infrastructure backing of Pixis.ai. The Google Premier Partner status, four consecutive years running, is the strongest third-party credential on this list. The 33 Clutch reviews are relatively modest in volume; ask for direct B2B references before committing.
Best for: B2B and professional services brands at Seed to Series A wanting AI search, paid media, and SEO managed under one team with genuine AI infrastructure backing.
Not ideal for: Pure SEO or GEO-only mandates; companies outside B2B and professional services.
8. Impression — Best for B2B SaaS and Fintech Wanting Integrated Performance Marketing + GEO
Impression was co-founded in Nottingham in 2012 by Aaron Dicks and Tom Craig, and has grown to a team of 120+ professionals across offices in Nottingham, London, and Manchester. The agency has accumulated significant industry recognition, including Campaign Performance Marketing Agency of the Year (2022 and 2025), and Prolific North Performance Marketing Agency of the Year (2024).
For B2B companies evaluating GEO, Impression’s appeal lies in its experimentation culture and proprietary tooling. Their Alexis platform supports AI search optimisation, and the Velocity tool is built around content experimentation at scale — enabling rapid iteration on GEO-focused content strategy. GEO sits within a full-service capability that includes paid media, content, digital PR, and analytics, making it a credible single-agency solution for brands wanting to consolidate.
Industries: B2B, SaaS, fintech, ecommerce, enterprise
Core Services:
- GEO (Generative Engine Optimisation) with Alexis tooling
- SEO (technical, content, link building)
- Digital PR
- Paid media (Google Ads, Paid Social, Programmatic)
- CRO and data analytics
Client-Fit Profile: Impression works with established B2B and SaaS brands that have enough existing authority to benefit from GEO amplification alongside a full-funnel performance programme. Their model suits companies that want to consolidate paid, organic, and AI search into one agency relationship. Pain points addressed: fragmented agency landscape; need for GEO integrated with paid media attribution.
Awards & Status: Campaign Performance Marketing Agency of the Year (2022, 2025). Prolific North Performance Marketing Agency of the Year (2024). Multiple European Search Awards recognitions. Clutch reviews exist but are primarily dated 2021–2022 — recent review activity is limited.
Verified Case Study: Impression’s SaaS case study library documents B2B technology and SaaS campaigns. A named, specific GEO case study with AI citation metrics was not publicly available during our research — the agency’s published SaaS work covers organic traffic and lead generation rather than specific AI-search attribution data. Request a GEO-specific case study directly during scoping.
Pricing: £3,000+/month.
Our Take: Impression earns its place as a strong single-agency option for established B2B SaaS and fintech companies that want performance marketing and GEO under one roof with proprietary tooling. The Campaign PMAY 2025 win and the 120-person team are credible credentials. The stale Clutch review pool and the absence of a publicly named GEO case study are gaps to verify directly.
Best for: Established B2B SaaS and fintech companies wanting GEO integrated with paid media, CRO, and digital PR under a full-service agency.
Not ideal for: Early-stage startups; companies needing GEO as a standalone channel or wanting a small, senior-led team.
9. ClickSlice — Best for SaaS Lead Gen and Fast-Moving Brands Wanting GEO With No Lock-In
ClickSlice is a London SEO agency founded in 2016 by Joshua George. The agency holds a 5.0★ Clutch rating (5 reviews), a 4.9/5 Google Business rating across 94 reviews, and in 2025 won two of the industry’s most recognised accolades: SEO Agency of the Year UK 2025 and a US Search Awards 2025 win. They were also finalists at the UK Digital Growth Awards 2024.
One detail stood out during our research: ClickSlice ranks #1 organically for “SEO agency London” — the most competitive SEO keyword in the UK. Their GEO and AEO services include AI Visibility tracking and LLM Optimisation, structured as a GEO layer above their core SEO and CRO work. They operate on month-to-month rolling contracts — a confidence signal few agencies offer.
Industries: SaaS lead generation, ecommerce, B2B services
Core Services:
- GEO (Generative Engine Optimisation)
- AEO (Answer Engine Optimisation)
- LLM Optimisation
- AI Visibility tracking
- Technical SEO
- Conversion-focused content
- Digital PR
Client-Fit Profile: ClickSlice is known primarily for ecommerce SEO but has documented B2B SaaS and lead generation work. Their model suits SaaS companies wanting ROI-first technical SEO and GEO with no contract lock-in and rapid iteration. They report a 91% client retention rate and an average 15x ROI across clients. Joshua George has trained 169,000+ students on Udemy and delivered SEO training for the UK Government.
Verified Case Study: ClickSlice’s seven published case studies are documented on FeaturedCustomers. Their self-published aggregate result is a 15x average ROI and 91% client retention. Specific named B2B SaaS or GEO case studies with AI citation metrics are not publicly detailed — request these directly for any GEO-specific mandate.
Pricing: Custom — minimum project size approximately £8,000+ based on Clutch data. Month-to-month rolling contracts, no lock-in.
Our Take: ClickSlice earns its place for SaaS and B2B brands that want a proven, awarded SEO team adding GEO capability with flexible terms. The SEO Agency of the Year UK 2025 award, the #1 rank for “SEO agency London,” and the month-to-month model are all genuine differentiators. The Clutch review volume is thin (5 reviews), and the GEO case study evidence is limited — verify both directly before committing.
Best for: SaaS lead generation; technically complex B2B sites; companies wanting no-lock-in GEO/AEO alongside strong technical SEO.
Not ideal for: Companies needing deep LLM engineering or a large, independently verified GEO track record; enterprise organisations.
Conclusion
The GEO and AEO market in the UK has moved fast in 2026, and so has the noise. The discipline is barely two years old as a structured practice, and the majority of SEO agency for B2B claiming it have simply relabelled existing SEO retainers. Every agency on this list passed a higher threshold: a named methodology, verifiable case studies with real metrics, and documented multi-platform tracking beyond Google alone.
For most B2B SaaS and tech startups between seed and Series B, GrowPad is the strongest starting point: 5.0★ Clutch across 38 recent reviews, four 2026 Top badges, documented LLMO and GEO methodology, and $500K–$20M ARR as the target ICP. For B2B regulated sectors needing pure-play GEO/AEO from a specialist, MarGen. For multi-region UK mid-market B2B tech with a strong preference for independently verified social proof, The SEO Works.
→ Start with a free AI Search Audit from GrowPad.
FAQ
What is the difference between GEO and AEO?
Generative Engine Optimisation (GEO) focuses on building the off-site brand signals — entity authority, third-party mentions, earned media — that AI platforms use to decide which brands to cite in generated responses. Answer Engine Optimisation (AEO) focuses on structuring on-site content so AI platforms can extract and reuse it directly as answers. Both are required in 2026. GEO builds recommendation frequency. AEO wins specific, high-intent questions closest to a purchase decision.
How long does it take to see GEO results?
MarGen reports first AI citations typically appearing within four to eight weeks. GrowPad’s documented case studies show measurable pipeline improvements within three to six months. GEO is faster to show early citation signals than traditional SEO, but sustained share of voice across AI platforms takes six to twelve months of consistent execution.
Do I need a separate GEO agency or can my SEO agency do it?
Most SEO agencies added “AI-first” to their service pages in 2024 without changing their methodology. The clearest test is to ask three questions: what is the named methodology, which AI platforms do you track citations on and with what tooling, and can you show a case study with before-and-after citation data? Agencies that answer all three concretely are building real GEO programmes. Agencies that talk in generalities about “optimising for AI” are not.
What starting budget do I need for GEO/AEO in the UK?
UK GEO retainers range from £2,000–£2,500/month at the entry end (Passion Digital, MarGen) to £5,000+/month for integrated programmes (The SEO Works, Blue Array, Hallam). Enterprise engagements with deep LLM technical work (UltraScout AI) typically run higher. Add-on GEO services layered on top of existing SEO retainers often start at £900+/month, per industry benchmarks. Always verify whether GEO tracking infrastructure is included in the retainer or billed separately.
Can a small UK startup afford GEO?
Yes. Passion Digital publishes GEO tiers starting at £450/month (GEO Visibility Boost). GrowPad serves companies from pre-seed stage with a £1,000+/month entry point for UK clients and a standalone AI Search Audit as a first step. MarGen’s month-to-month model starts at £2,500/month. The agencies best suited to early-stage SaaS startups are GrowPad and Passion Digital based on published ICP data.
How do I measure whether GEO is working?
The right metrics are citation frequency (how often your brand appears when AI tools answer buyer-intent queries in your category), share of voice (your brand versus competitors in AI answers), pipeline attribution from AI-referred traffic, and conversion rate differential between AI-referred visitors and traditional organic visitors. According to Ahrefs’ 2025 research, AI search visitors convert at dramatically higher rates than traditional organic. An agency that only reports Google rankings and organic sessions after a GEO engagement has not done GEO.
