# Best AI Agencies for B2B Companies in London

> 11 agencies. Top-ranked: Datatonic, Fast Data Science, Kortical.

Canonical page: https://www.aiagencies.eu/for/b2b/london
Generated: 2026-09-20 · Curated by Gabor Kiss · No paid placements — inclusion, score, and rank are never sold.

## Ranked roster
1. **Datatonic** — London, United Kingdom · rate not published · team 50-249 · founded 2013 · services: AI Consulting, AI Development, Generative AI · 8 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/datatonic
2. **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
3. **Kortical** — London, United Kingdom · €85-130/hr (directory-listed) · team 2-9 · founded 2016 · services: AI Consulting, AI Development, Generative AI · 8 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/kortical
4. **Satalia** — London, United Kingdom · rate not published · team 50-249 · founded 2008 · services: AI Consulting, AI Development, AI Agents · 6 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/satalia
5. **Datasparq** — London, United Kingdom · rate not published · team 50-249 · founded 2018 · services: AI Consulting, AI Development, AI Agents · 6 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/datasparq
6. **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
7. **Imobisoft** — London, United Kingdom · €45-85/hr (directory-listed) · team 10-49 · founded 2009 · services: AI Consulting, AI Development, Generative AI · 4 documented client engagements with source URLs · reviewed 2026-09-04 · https://www.aiagencies.eu/agency/imobisoft
8. **Ekimetrics** — London, United Kingdom · rate not published · team 50-249 · founded 2006 · services: AI Consulting, AI Marketing, Generative AI · 8 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/ekimetrics
9. **Faculty** — London, United Kingdom · rate not published · founded 2014 · services: AI Consulting, AI Development, AI Automation, AI Agents · 3 documented client engagements with source URLs · reviewed 2026-08-04 · https://www.aiagencies.eu/agency/faculty-ai
10. **Brainpool** — London, United Kingdom · €130-175/hr (directory-listed) · team 10-49 · founded 2017 · services: AI Consulting, AI Automation, AI Development · 3 documented client engagements with source URLs · reviewed 2026-08-04 · https://www.aiagencies.eu/agency/brainpool
11. **Neurons Lab** — London, United Kingdom · rate not published · team 50-249 · founded 2019 · services: AI Consulting, AI Agents, AI Development, Generative AI · 2 documented client engagements with source URLs · reviewed 2026-08-04 · https://www.aiagencies.eu/agency/neurons-lab

## 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):
- Datatonic vs Faculty: https://www.aiagencies.eu/compare/datatonic-vs-faculty-ai
- Datatonic vs Satalia: https://www.aiagencies.eu/compare/datatonic-vs-satalia
- Faculty vs Satalia: https://www.aiagencies.eu/compare/faculty-ai-vs-satalia

## About this market
London's B2B bench is the deepest in this register, and it publishes the kind of operational numbers that make a business case defensible. Faculty's generative support tooling inside Tide's live operation cut ticket-handling time by a published 10%, and its recommender sources 25% of Axiom Law's hires. Brainpool's case studies include market-abuse surveillance models for HSBC—delivery inside one of the most scrutinized operational environments in Europe—alongside a timber-design platform productized as Daisy AI. Neurons Lab builds AI for regulated financial services, with the Visa engagement publishing system, stack and timeline.

The depth runs past those. Satalia's routing and workforce systems have been running inside FTSE-scale clients for the better part of a decade, Datatonic's MLOps and retrieval work spans Vertex AI and Bedrock, Datasparq ships recommendation and revenue-management systems on Google Cloud, Kortical took a Deloitte tax computation from five hours to six minutes, and Fast Data Science works unstructured-document NLP for pharma and regulators.

London B2B work skews regulated: the operational systems these firms ship land inside banks, law firms and financial institutions, where the integration and compliance surface carries as much budget as the model. That experience prices at the top of the European range, and the honest question is whether your engagement needs it. If your operational system faces a supervisor, this page is the shortlist; if it does not, the Berlin and Manchester B2B rosters deliver comparable engineering below the London premium.

## Questions buyers ask

### How many AI agencies work with B2B in London?
11 agencies in our directory combine verified B2B client evidence with a London base. The current top-ranked are Datatonic, Fast Data Science, Kortical — ordered by depth of documented client evidence, then our editorial scoring (portfolio quality, credibility, completeness); placement is never paid.

### How much does an AI agency cost in London?
Published rates across this page's agencies run €45–260 per hour (median ~€130). Project totals depend on scope — the rate index at /rates breaks the computed bands down by region, country and team size.

### How is B2B experience verified on this page?
Each listed agency has at least two documented, named B2B clients — published case studies or engagement descriptions our research actually read, with source URLs stored per client. Logo walls without published evidence carry no weight, which is what separates this list from self-declared directories.

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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