# Best AI Development Agencies for B2B Companies

> 118 agencies. Top-ranked: Square Root Solutions, Storm Technology, AI Sisters.

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

## Ranked roster
Top 30 of 118 agencies on this page.

1. **Square Root Solutions** — Dublin, Ireland · €20-40/hr (directory-listed) · team 10-49 · founded 2018 · services: AI Development, Generative AI · 10 documented client engagements with source URLs · reviewed 2026-09-16 · https://www.aiagencies.eu/agency/square-root-solutions
2. **Storm Technology** — Dublin, Ireland · rate not published · team 50-249 · founded 1995 · services: AI Consulting, Generative AI, AI Development · 8 documented client engagements with source URLs · reviewed 2026-09-03 · https://www.aiagencies.eu/agency/storm-technology
3. **AI Sisters** — Paris, France · rate not published · services: AI Consulting, AI Agents, AI Development · 9 documented client engagements with source URLs · reviewed 2026-08-05 · https://www.aiagencies.eu/agency/ai-sisters
4. **Lexunit** — Budapest, Hungary · €45-85/hr (directory-listed) · team 10-49 · founded 2017 · services: AI Development, AI Automation, AI Consulting · 9 documented client engagements with source URLs · reviewed 2026-09-03 · https://www.aiagencies.eu/agency/lexunit
5. **Modulai** — Stockholm, Sweden · rate not published · team 10-49 · founded 2018 · services: AI Consulting, AI Development, Generative AI, AI Agents · 12 documented client engagements with source URLs · reviewed 2026-08-05 · https://www.aiagencies.eu/agency/modulai
6. **DataNorth AI** — Groningen, Netherlands · €150/hr · team 10-49 · founded 2022 · services: AI Consulting, AI Development, AI Automation, Generative AI · 9 documented client engagements with source URLs · reviewed 2026-08-05 · https://www.aiagencies.eu/agency/datanorth
7. **Cloud District** — Madrid, Spain · €45-85/hr (directory-listed) · team 50-249 · founded 2010 · services: AI Development, AI Consulting · 11 documented client engagements with source URLs · reviewed 2026-09-20 · https://www.aiagencies.eu/agency/cloud-district
8. **Adastra** — Frankfurt, Germany · rate not published · team 250+ · founded 2000 · services: AI Consulting, AI Development, Generative AI · 10 documented client engagements with source URLs · reviewed 2026-09-16 · https://www.aiagencies.eu/agency/adastra
9. **DareData** — Lisbon, Portugal · €45-85/hr (directory-listed) · team 50-249 · founded 2019 · services: AI Development, AI Consulting, Generative AI · 10 documented client engagements with source URLs · reviewed 2026-09-03 · https://www.aiagencies.eu/agency/daredata
10. **Dashbouquet** — Tallinn, Estonia · €45-85/hr (directory-listed) · team 50-249 · founded 2014 · services: AI Development, Generative AI, AI Consulting · 5 documented client engagements with source URLs · reviewed 2026-09-03 · https://www.aiagencies.eu/agency/dashbouquet
11. **DATAFOREST** — Tallinn, Estonia · €45-85/hr (directory-listed) · team 50-249 · founded 2017 · services: AI Consulting, AI Development, AI Automation · 7 documented client engagements with source URLs · reviewed 2026-09-03 · https://www.aiagencies.eu/agency/dataforest
12. **b.telligent** — Munich, Germany · rate not published · team 250+ · founded 2005 · services: AI Consulting, AI Development · 9 documented client engagements with source URLs · reviewed 2026-09-20 · https://www.aiagencies.eu/agency/b-telligent
13. **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
14. **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
15. **Zühlke** — Zurich, Switzerland · rate not published · team 250+ · founded 1968 · services: AI Development, AI Consulting · 5 documented client engagements with source URLs · reviewed 2026-08-07 · https://www.aiagencies.eu/agency/zuehlke
16. **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
17. **Hiflylabs** — Budapest, Hungary · rate not published · team 250+ · founded 2015 · services: AI Consulting, AI Development, AI Automation · 8 documented client engagements with source URLs · reviewed 2026-09-03 · https://www.aiagencies.eu/agency/hiflylabs
18. **Lautmaler** — Berlin, Germany · rate not published · team 10-49 · services: AI Consulting, AI Development, Generative AI · 8 documented client engagements with source URLs · reviewed 2026-08-05 · https://www.aiagencies.eu/agency/lautmaler
19. **Merixstudio** — Poznań, Poland · €45-85/hr (directory-listed) · team 50-249 · founded 1999 · services: AI Development, AI Consulting, AI Automation, AI Agents · 8 documented client engagements with source URLs · reviewed 2026-09-08 · https://www.aiagencies.eu/agency/merixstudio
20. **Shift Agency** — Frankfurt, Germany · rate not published · team 10-49 · founded 1997 · services: Generative AI, AI Consulting, AI Development · 8 documented client engagements with source URLs · reviewed 2026-09-16 · https://www.aiagencies.eu/agency/shift-agency
21. **Hybrid Heroes** — Berlin, Germany · €85-130/hr (directory-listed) · team 10-49 · founded 2015 · services: AI Consulting, AI Development, Generative AI, AI Agents · 7 documented client engagements with source URLs · reviewed 2026-08-05 · https://www.aiagencies.eu/agency/hybrid-heroes
22. **Phenomenon Studio** — Tallinn, Estonia · €45-85/hr (directory-listed) · team 50-249 · founded 2019 · services: AI Development, AI Consulting · 7 documented client engagements with source URLs · reviewed 2026-09-03 · https://www.aiagencies.eu/agency/phenomenon-studio
23. **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
24. **Vstorm** — Wrocław, Poland · €85-130/hr (directory-listed) · team 10-49 · founded 2017 · services: AI Consulting, AI Development, Generative AI, AI Agents · 8 documented client engagements with source URLs · reviewed 2026-09-08 · https://www.aiagencies.eu/agency/vstorm
25. **elunic** — Munich, Germany · rate not published · team 10-49 · founded 2013 · services: AI Development, AI Consulting, AI Agents · 6 documented client engagements with source URLs · reviewed 2026-09-20 · https://www.aiagencies.eu/agency/elunic
26. **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
27. **Version 1** — Dublin, Ireland · rate not published · team 250+ · founded 1996 · services: AI Consulting, AI Development, Generative AI · 6 documented client engagements with source URLs · reviewed 2026-09-03 · https://www.aiagencies.eu/agency/version-1
28. **Algorithma** — Stockholm, Sweden · rate not published · founded 2022 · services: AI Consulting, AI Development, AI Agents, AI Automation · 6 documented client engagements with source URLs · reviewed 2026-08-05 · https://www.aiagencies.eu/agency/algorithma
29. **Bismart** — Barcelona, Spain · rate not published · team 50-249 · founded 2009 · services: AI Consulting, AI Development, Generative AI · 6 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/bismart
30. **Yield Studio** — Lyon, France · €85-130/hr (directory-listed) · team 50-249 · founded 2019 · services: AI Development, Generative AI, AI Agents · 6 documented client engagements with source URLs · reviewed 2026-09-04 · https://www.aiagencies.eu/agency/yield-studio

## 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):
- Adastra vs Datatonic: https://www.aiagencies.eu/compare/adastra-vs-datatonic
- Dashbouquet vs DATAFOREST: https://www.aiagencies.eu/compare/dashbouquet-vs-dataforest
- Datatonic vs Satalia: https://www.aiagencies.eu/compare/datatonic-vs-satalia
- Fast Data Science vs Vstorm: https://www.aiagencies.eu/compare/fast-data-science-vs-vstorm

## About this market
Every agency on this page builds custom AI systems on top of verified B2B evidence, making this the broadest development page in the B2B segment—and the one where the evidence lines on each card work hardest. The exemplars set the bar. dida's Deutsche Bahn anomaly detection names its techniques: MonoViT fine-tuning, SAM, self-supervised learning on unannotated data. ML6's Scout24 build documents an evaluation framework with human testing and LLM-as-a-judge against an 85% quality bar. Brainpool's HSBC market-abuse surveillance shipped into one of Europe's most scrutinized environments, and Fuzzy Labs takes models into open-source MLOps infrastructure the client runs alone—including edge deployments.

B2B development lives inside operational stacks, so the questions that sort this roster are integration questions: which system of record did the documented work land in, whose infrastructure does it run on, and what could the client's team maintain unaided after handover. Ask for the named comparable system—on this page, unusually, most candidates have one to name. Where they hesitate, the documented-client counts show which firms have the body of work their positioning claims.

## Questions buyers ask

### How many AI agencies work with B2B on ai development?
118 agencies in our directory combine verified B2B client evidence with documented AI Development work. The current top-ranked are Square Root Solutions, Storm Technology, AI Sisters — 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 for ai development?
Published rates across this page's agencies run €20–260 per hour (median ~€65). 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.

### Can these agencies embed consultants with our team?
7 of the agencies on this page document an embedded / team-extension working model. See the team-extension page for the full verified list, or check the engagement chips on individual profiles.

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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