# Best SaaS & B2B AI Agencies in the UK

> 25 agencies. Top-ranked: Fast Data Science, Elsewhen, N-iX.

Canonical page: https://www.aiagencies.eu/industries/saas/uk
Generated: 2026-09-28 · Curated by Gabor Kiss · No paid placements — inclusion, score, and rank are never sold.

## Ranked roster
1. **Fast Data Science** — London, United Kingdom · €175-260/hr (directory-listed) · team 2-9 · founded 2018 · services: AI Development, AI Consulting · 8 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/fast-data-science
2. **Elsewhen** — London, United Kingdom · rate not published · team 50-249 · founded 2011 · services: AI Development, AI Consulting, Generative AI · 2 documented client engagements with source URLs · reviewed 2026-08-06 · https://www.aiagencies.eu/agency/elsewhen
3. **N-iX** — London, United Kingdom · €45-85/hr (directory-listed) · team 1000+ · founded 2002 · services: AI Consulting, AI Development, Generative AI, AI Agents · 4 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/n-ix
4. **Kainos** — Belfast, United Kingdom · rate not published · team 1000+ · founded 1986 · services: AI Development, Generative AI, AI Consulting · 6 documented client engagements with source URLs · reviewed 2026-09-08 · https://www.aiagencies.eu/agency/kainos
5. **Fuzzy Labs** — Manchester, United Kingdom · rate not published · services: AI Development, AI Consulting · 2 documented client engagements with source URLs · reviewed 2026-08-04 · https://www.aiagencies.eu/agency/fuzzy-labs
6. **Transparity** — London, United Kingdom · €85-130/hr (directory-listed) · team 250+ · founded 2015 · services: AI Consulting, AI Development, AI Automation, AI Agents · 8 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/transparity
7. **Found** — London, United Kingdom · €85-130/hr (directory-listed) · team 50-249 · founded 2005 · services: AI SEO, AI Marketing, AI Automation · 8 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/found
8. **Marionete** — London, United Kingdom · €45-85/hr (directory-listed) · team 10-49 · founded 2016 · services: AI Consulting, AI Development · 6 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/marionete
9. **Blueberry Consultants** — Birmingham, United Kingdom · €20-40/hr (directory-listed) · team 10-49 · founded 1996 · services: AI Development, Generative AI, AI Consulting · 3 documented client engagements with source URLs · reviewed 2026-09-04 · https://www.aiagencies.eu/agency/blueberry-consultants
10. **iCentric Agency** — London, United Kingdom · €85-130/hr (directory-listed) · team 10-49 · founded 2002 · services: AI Development, AI Consulting, AI Automation, Generative AI · 2 documented client engagements with source URLs · reviewed 2026-08-06 · https://www.aiagencies.eu/agency/icentric-agency
11. **Softblues** — London, United Kingdom · €45-85/hr (directory-listed) · team 10-49 · founded 2014 · services: AI Automation, AI Agents, AI Consulting, AI Development · 5 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/softblues
12. **Tiksom** — Manchester, United Kingdom · €20-40/hr (directory-listed) · team 10-49 · founded 2015 · services: AI Development, AI Agents, AI Consulting · 3 documented client engagements with source URLs · reviewed 2026-08-06 · https://www.aiagencies.eu/agency/tiksom
13. **Sputnik Digital** — Manchester, United Kingdom · €85-130/hr (directory-listed) · team 2-9 · founded 1998 · services: AI Development, AI Consulting · 2 documented client engagements with source URLs · reviewed 2026-08-04 · https://www.aiagencies.eu/agency/sputnik-digital
14. **Nebuli** — London, United Kingdom · rate not published · team 2-9 · founded 2019 · services: Generative AI, AI Development, AI Consulting · 5 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/nebuli
15. **Ortom** — Manchester, United Kingdom · €85-130/hr (directory-listed) · founded 2019 · services: AI Consulting, AI Development · 3 documented client engagements with source URLs · reviewed 2026-08-04 · https://www.aiagencies.eu/agency/ortom
16. **Hexploits** — London, United Kingdom · €45-85/hr (directory-listed) · team 2-9 · founded 2018 · services: AI Development, AI Agents, AI Consulting · 3 documented client engagements with source URLs · reviewed 2026-08-06 · https://www.aiagencies.eu/agency/hexploits
17. **Vention** — London, United Kingdom · €45-85/hr (directory-listed) · team 1000+ · founded 2002 · services: AI Development, AI Consulting, AI Agents · 10 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/vention
18. **Old St Labs** — London, United Kingdom · €45-85/hr (directory-listed) · team 50-249 · founded 2020 · services: AI Development, AI Consulting · 10 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/old-st-labs
19. **NOVOS** — London, United Kingdom · €130-170/hr (directory-listed) · team 10-49 · founded 2018 · services: AI SEO, AI Marketing · 5 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/novos
20. **B13 AI** — Birmingham, United Kingdom · €20-40/hr (directory-listed) · team 10-49 · founded 2010 · services: AI Development, AI Consulting · 4 documented client engagements with source URLs · reviewed 2026-09-04 · https://www.aiagencies.eu/agency/b13-ai
21. **Catalyst Marketing Agency** — Birmingham, United Kingdom · rate not published · team 10-49 · founded 2012 · services: AI SEO, AI Marketing · 1 documented client engagement with source URLs · reviewed 2026-08-06 · https://www.aiagencies.eu/agency/catalyst-marketing-agency
22. **Pixelette Technologies** — London, United Kingdom · €20-40/hr (directory-listed) · team 250+ · founded 2018 · services: AI Development, AI Agents, AI Consulting, Generative AI · 7 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/pixelette-technologies
23. **Opinov8** — London, United Kingdom · €45-85/hr (directory-listed) · team 250+ · founded 2017 · services: AI Consulting, AI Development, AI Agents, Generative AI · 6 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/opinov8
24. **ClickSlice** — London, United Kingdom · rate not published · team 10-49 · founded 2016 · services: AI SEO · 6 documented client engagements with source URLs · reviewed 2026-09-24 · https://www.aiagencies.eu/agency/clickslice
25. **App Web Dev** — Manchester, United Kingdom · rate not published · team 1-9 · services: AI Agents, AI Automation, AI Development · reviewed 2026-08-04 · https://www.aiagencies.eu/agency/app-web-dev

## Compared head-to-head
Curated comparison pages (published rates, team size, coverage, projected 12-week engagement cost, and the curator's verdict on both sides — pairings are never sold):
- B13 AI vs Blueberry Consultants: https://www.aiagencies.eu/compare/b13-ai-vs-blueberry-consultants
- Fuzzy Labs vs Sputnik Digital: https://www.aiagencies.eu/compare/fuzzy-labs-vs-sputnik-digital

## About this market
Software buyers compare on price more than any other segment, and this page reflects it—rate publication runs higher here than on any other UK roster, which makes the scale range legible. At one end, Kainos, N-iX and Vention each list a thousand or more staff and sell delivery capacity. At the other, App Web Dev in Manchester is a single founder running agent pipelines whose published evidence is entirely self-built, with no client reference to check. Manchester's specialists cluster on this page: Fuzzy Labs for open-source MLOps, Sputnik Digital for AI features added to products that already have users, Tiksom for agent architecture, Ortom as a named-principal machine-learning practice. London spreads across the whole range, from Old St Labs at the early-stage end to Elsewhen, whose AI work is published under NDA but still carries numbers—a multi-model toolchain that reclaimed about a quarter of a FTSE 100 forecasting platform's discovery timeline and spend.

Stage of join is the screen that matters, not capability. A team arriving to build a feature and a team arriving to keep one running solve different problems, quote differently, and only the second cares about drift. Ask what a candidate measured after launch: per-request model cost, latency budget, and who reads the evaluation output in month nine. Fuzzy Labs publishes the sharpest version of that discipline—model deployment cut from two days to five minutes by a custom MLOps pipeline—because operating models is the practice rather than a service line. Then settle ownership before scoping: whose cloud account the system lives in, and whether the code and model artifacts transfer.

## Cite this figure
> Of the 25 SaaS & B2B AI agencies in the UK on AIAgencies.eu, 18 carry an hourly rate range, from the agency itself or a third-party directory; the median of those 18 is about €65/hr (September 2026).
> Source: https://www.aiagencies.eu/industries/saas/uk#market-snapshot

## Questions buyers ask

### How much do SaaS & B2B AI agencies in the UK charge?
Of the 25 SaaS & B2B AI agencies on this page, 18 publish complete hourly rate ranges. They range from €20 to €260, with a median around €65. Across the register, rated agencies in the UK bill €65–110/hr (27 rated). 11 agencies operate under €100/hr: N-iX, Marionete, Blueberry Consultants, Softblues.

### Which are the top-rated SaaS & B2B AI agencies in the UK?
Based on our editorial scoring (portfolio quality, business credibility, and case study depth), the top-ranked SaaS & B2B AI agencies in the UK are Fast Data Science, Elsewhen, N-iX. See the full review on each agency's profile.

### What other industries do UK SaaS & B2B agencies serve?
Beyond SaaS & B2B, the most common cross-industry experience among these agencies is FinTech (10 of 25 agencies). Notable examples include Elsewhen, N-iX, Transparity.

### How recent are these SaaS & B2B AI agency reviews?
All 25 agencies on this page were editorially reviewed between Aug 4, 2026 and Sep 24, 2026 — the most recent being ClickSlice. See our review methodology for how scores are calculated.

### What's the smallest team size available for saas & b2b in the UK?
Fast Data Science, Sputnik Digital, Nebuli are the boutique studios (under 10 people) on this page, ideal for projects needing senior-level attention without large-team overhead.

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Source: AIAgencies.eu — the curated register of European AI agencies. Rate provenance: "agency-confirmed" = disclosed via submission or claimed profile; "directory-listed" = Clutch or two agreeing B2B directories (lone unverified sources are never written). Full method: https://www.aiagencies.eu/methodology · Rate index: https://www.aiagencies.eu/rates