# Best FinTech AI Agencies for Retainer Work

> 29 agencies. Top-ranked: Storm Technology, Lexunit, OstraconAI.

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

## Ranked roster
1. **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
2. **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
3. **OstraconAI** — Helsinki, Finland · €250-400/hr (agency-confirmed) · team 10-49 · founded 2024 · services: AI Consulting, AI Marketing, AI Automation · 11 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/ostraconai
4. **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
5. **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
6. **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
7. **HolistiCRM** — Budapest, Hungary · €20-40/hr (directory-listed) · team 2-9 · founded 2014 · services: AI Automation, AI Consulting, AI Development · 7 documented client engagements with source URLs · reviewed 2026-09-09 · https://www.aiagencies.eu/agency/holisticrm
8. **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
9. **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
10. **Siili Solutions** — Helsinki, Finland · €45-85/hr (directory-listed) · team 250+ · founded 2005 · services: AI Consulting, AI Development, AI Automation · 5 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/siili-solutions
11. **Adnovum** — Zurich, Switzerland · rate not published · team 250+ · founded 1988 · services: AI Development, AI Consulting, Generative AI · 5 documented client engagements with source URLs · reviewed 2026-08-07 · https://www.aiagencies.eu/agency/adnovum
12. **Plain Concepts** — Madrid, Spain · €85-130/hr (directory-listed) · team 250+ · founded 2006 · services: AI Consulting, AI Development, Generative AI · 4 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/plain-concepts
13. **Squirro** — Zurich, Switzerland · rate not published · team 50-249 · founded 2012 · services: Generative AI, AI Development · 6 documented client engagements with source URLs · reviewed 2026-08-07 · https://www.aiagencies.eu/agency/squirro
14. **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
15. **TEKenable** — Dublin, Ireland · rate not published · team 50-249 · founded 2002 · services: AI Consulting, Generative AI, AI Development · 4 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/tekenable
16. **Idiro Analytics** — Dublin, Ireland · rate not published · team 10-49 · founded 2003 · services: AI Consulting, AI Development · 4 documented client engagements with source URLs · reviewed 2026-09-16 · https://www.aiagencies.eu/agency/idiro-analytics
17. **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
18. **Sngular** — Madrid, Spain · rate not published · team 1000+ · founded 2014 · services: AI Development, AI Consulting · 3 documented client engagements with source URLs · reviewed 2026-09-20 · https://www.aiagencies.eu/agency/sngular
19. **Neuron Solutions** — Budapest, Hungary · €85-130/hr (directory-listed) · team 10-49 · founded 2018 · services: AI Consulting, AI Development, AI Automation · 3 documented client engagements with source URLs · reviewed 2026-09-09 · https://www.aiagencies.eu/agency/neuron-solutions
20. **Mobile Reality** — Warsaw, Poland · €39-57/hr (directory-listed) · team 10-49 · founded 2016 · services: AI Agents, AI Consulting, AI Development · 3 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/mobile-reality
21. **G+D Netcetera** — Zurich, Switzerland · rate not published · team 1000+ · founded 1996 · services: AI Development, Generative AI · 1 documented client engagement with source URLs · reviewed 2026-08-07 · https://www.aiagencies.eu/agency/netcetera
22. **Gemmo AI** — Dublin, Ireland · €45-85/hr (directory-listed) · team 10-49 · founded 2014 · services: AI Development, AI Consulting · 3 documented client engagements with source URLs · reviewed 2026-09-16 · https://www.aiagencies.eu/agency/gemmo-ai
23. **Grepton** — Budapest, Hungary · rate not published · team 50-249 · founded 2001 · 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/grepton
24. **Dmlab** — Budapest, Hungary · rate not published · team 10-49 · founded 2007 · services: AI Consulting, AI Development · 2 documented client engagements with source URLs · reviewed 2026-09-09 · https://www.aiagencies.eu/agency/dmlab
25. **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
26. **Amsterdam Data Collective** — Amsterdam, Netherlands · rate not published · services: AI Consulting, AI Development · 2 documented client engagements with source URLs · reviewed 2026-08-04 · https://www.aiagencies.eu/agency/amsterdam-data-collective
27. **Clearlead AI Consulting** — Dublin, Ireland · €85-130/hr (directory-listed) · team 2-9 · founded 2024 · services: AI Consulting, AI Development, Generative AI · 2 documented client engagements with source URLs · reviewed 2026-09-16 · https://www.aiagencies.eu/agency/clearlead-ai-consulting
28. **Konversational** — Dublin, Ireland · rate not published · team 50-249 · founded 2020 · services: AI Automation, AI Agents, AI Consulting · 3 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/konversational
29. **Codec** — Dublin, Ireland · rate not published · team 250+ · founded 1985 · services: AI Consulting, AI Development · 2 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/codec

## 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):
- Dmlab vs Hiflylabs: https://www.aiagencies.eu/compare/dmlab-vs-hiflylabs
- Dmlab vs HolistiCRM: https://www.aiagencies.eu/compare/dmlab-vs-holisticrm
- Faculty vs Hiflylabs: https://www.aiagencies.eu/compare/faculty-ai-vs-hiflylabs
- Hiflylabs vs HolistiCRM: https://www.aiagencies.eu/compare/hiflylabs-vs-holisticrm
- OstraconAI vs Siili Solutions: https://www.aiagencies.eu/compare/ostraconai-vs-siili-solutions

## About this market
This page carries more named financial institutions than named financial AI, and reading it means separating the names from the systems. Siili Solutions' Bobotin at LähiTapiola Finance is a clearly documented regulated deployment: a retrieval-augmented agent in production on Azure that drafts customer-service replies from contract terms, classifies complaints into regulated categories, leaves a person to send, and is maintained as a managed service under the EU AI Act and ISO/IEC 42001 certification. Faculty's AgentAssist and MemberSummarise tools run inside Tide's customer-service workflows with a published 10% cut in ticket-handle time. Hiflylabs built an agentic RAG knowledge base for Erste Bank's branch clerks on LangGraph and Azure AI Search, reporting 40% higher answer accuracy. Squirro names the European Central Bank, Standard Chartered and OCBC, and its flagship case, 36 full-time roles freed at a European financial institution, sits behind a download form without the institution's name. Several other financial names attach to other work: Adnovum's UBS KeyClub and PostFinance passwordless access are software engineering, and its AI voicebot serves a building insurer; G+D Netcetera's SIX, Viseca, Valiant and DKB engagements are payments platforms; Mobile Reality's Nomis Solutions build was a pricing-platform MVP with no AI component; Bismart's Banc Sabadell work is dashboards under ongoing maintenance. OstraconAI's Evitec campaign reached 1,000 or more decision-makers at Nordic financial organizations, outbound marketing for a fintech rather than fintech AI.

For a regulated buyer the retainer question is who answers the auditor. Ask which named financial client runs an AI system the agency operates today, under what certification, and how model changes are logged. Where the case is anonymous or behind a form, ask for a speakable reference before signing a monthly fee.

## Questions buyers ask

### How many AI agencies work with retainer on fintech?
29 agencies in our directory combine verified retainer client evidence with documented FinTech work. The current top-ranked are Storm Technology, Lexunit, OstraconAI — 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 fintech?
Published rates across this page's agencies run €20–400 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 the retainer model verified?
Every agency here documents retainer work on its own site or in a published case study, describing the engagement structure rather than a service-list claim. We never infer the model from portfolio tone, so this list only contains agencies that operate retainer engagements deliberately.

### Can these agencies embed consultants with our team?
5 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