# AI Agencies and Consultancies on Retainer in Europe

> 56 agencies. Top-ranked: Faculty, Pexon Consulting, Siili Solutions.

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

## Ranked roster
Top 30 of 56 agencies on this page.

1. **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
2. **Pexon Consulting** — Munich, Germany · €130-175/hr (directory-listed) · team 50-249 · founded 2019 · services: AI Consulting, AI Development, AI Automation · 6 documented client engagements with source URLs · reviewed 2026-09-20 · https://www.aiagencies.eu/agency/pexon-consulting
3. **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
4. **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
5. **Spanish Point Technologies** — Dublin, Ireland · rate not published · team 50-249 · founded 2005 · services: AI Development, AI Consulting · 4 documented client engagements with source URLs · reviewed 2026-09-16 · https://www.aiagencies.eu/agency/spanish-point-technologies
6. **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
7. **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
8. **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
9. **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
10. **Limebit** — Berlin, Germany · rate not published · team 2-9 · founded 2016 · services: AI Development, AI Consulting · 2 documented client engagements with source URLs · reviewed 2026-09-09 · https://www.aiagencies.eu/agency/limebit
11. **Flobotics** — Warsaw, Poland · €85-130/hr (directory-listed) · team 10-49 · founded 2019 · services: AI Automation, AI Agents, AI Development · 3 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/flobotics
12. **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
13. **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
14. **Xomnia** — Amsterdam, Netherlands · rate not published · team 50-249 · founded 2013 · services: AI Consulting, AI Development, Generative AI · 3 documented client engagements with source URLs · reviewed 2026-08-04 · https://www.aiagencies.eu/agency/xomnia
15. **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
16. **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
17. **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
18. **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
19. **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
20. **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
21. **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
22. **Boldare** — Amsterdam, Netherlands · €45-85/hr (directory-listed) · team 50-249 · founded 2004 · services: AI Development, Generative AI, AI Consulting · 5 documented client engagements with source URLs · reviewed 2026-09-24 · https://www.aiagencies.eu/agency/boldare
23. **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
24. **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
25. **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
26. **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
27. **Contiamo** — Berlin, Germany · rate not published · team 10-49 · founded 2012 · services: AI Consulting, AI Development, Generative AI · 6 documented client engagements with source URLs · reviewed 2026-09-24 · https://www.aiagencies.eu/agency/contiamo
28. **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
29. **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
30. **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

## 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
- Spanish Point Technologies vs Square Root Solutions: https://www.aiagencies.eu/compare/spanish-point-technologies-vs-square-root-solutions

## About this market
A retainer buys continuity: the agency that built the system keeps operating, tuning and extending it for a monthly fee, instead of handing it over at the end of a project. In AI work that continuity is worth more than in most software, because models drift, prompts age, source data changes shape and the regulatory ground under a deployed system moves. Every agency on this page documents a retainer or managed-service relationship on its own site or in a published case study. The chip is never inferred from a pricing page or a service list.

The documented relationships show what the model buys. Siili Solutions maintains Bobotin, the retrieval-augmented agent that drafts customer-service replies at LähiTapiola Finance, as an ongoing managed service under GDPR and EU AI Act constraints rather than as a delivered build. Adnovum operates the Berna claims voicebot it architected for Gebäudeversicherung Bern, a system that handles up to 2,700 calls a day during storm events. OstraconAI's outreach engagement for Gosta Labs is described as an ongoing retainer, with prompts tuned weekly. Bismart's work for Banc Sabadell and Segittur is documented as ongoing evolution and maintenance, and Inbold has been Ambu's single production partner for instructions-for-use since 2016. Pexon Consulting's private AI platform at Deutz reached more than 5,000 users, the kind of footprint that needs an operator, not a handover.

Read a retainer proposal with three questions. What is the operating scope: monitoring, retraining, prompt and data maintenance, or new features on the same budget? What does the agency measure, and does it publish it? And what happens at exit: who owns the pipelines, the evaluation sets and the documentation when the retainer ends? An agency that can answer the third question in writing is selling continuity; one that cannot is selling dependency. Scores rank portfolio quality and credibility; placement is never sold.

## Questions buyers ask

### What counts as a retainer engagement on this page?
A documented ongoing relationship in which the agency operates, maintains or keeps extending a system for a recurring fee: a managed service, a monthly retainer, a multi-year production partnership. The agency describes the model on its own site or a published case study documents it, with the source URL stored per client. A pricing page offering retainers is not evidence; a named client on one is.

### How much does an AI retainer cost in Europe?
Retainers are priced as a monthly block derived from the hourly bands each agency publishes, scaled to the operating scope. Published rates for the agencies here run across the European range on our rate index; the block a retainer buys depends on whether it covers monitoring alone or monitoring plus retraining, prompt maintenance and new features. Ask for the scope in writing before comparing monthly figures.

### How is a retainer different from team extension?
A retainer keeps the work on the agency's side of the fence: the agency operates and extends a system it usually built. Team extension puts named engineers inside your team, working your backlog under your leadership. Retainers suit a deployed system that needs an operator and a stream of bounded improvements; extension suits continuous product work with no natural end. The team-extension page lists the agencies that document that model.

### What should the exit terms of an AI retainer say?
Who owns the code, pipelines, evaluation sets and documentation; what the handover period is; and whether the agency's platform components are licensed or transferred. Some agencies on this page build on their own platforms, which is legitimate but changes what an exit looks like, so ask in month one, not month twelve.

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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