# Best AI Consulting Agencies for Retainer Work

> 48 agencies. Top-ranked: Storm Technology, Lexunit, ontolux.

Canonical page: https://www.aiagencies.eu/services/ai-consulting/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 48 agencies on this page.

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. **ontolux** — Berlin, Germany · rate not published · team 10-49 · services: AI Development, AI Consulting, Generative AI · 11 documented client engagements with source URLs · reviewed 2026-09-24 · https://www.aiagencies.eu/agency/ontolux
4. **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
5. **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
6. **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
7. **Data Analytics** — Rotterdam, Netherlands · rate not published · team 10-49 · services: AI Consulting · 10 documented client engagements with source URLs · reviewed 2026-09-24 · https://www.aiagencies.eu/agency/data-analytics
8. **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
9. **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
10. **QED Software** — Warsaw, Poland · €85-130/hr (directory-listed) · team 10-49 · founded 1999 · services: AI Consulting, AI Development, Generative AI · 7 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/qed-software
11. **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
12. **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
13. **Syncronika** — Milan, Italy · rate not published · team 10-49 · founded 2010 · services: AI Agents, AI Automation, AI Consulting · 6 documented client engagements with source URLs · reviewed 2026-09-24 · https://www.aiagencies.eu/agency/syncronika
14. **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
15. **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
16. **Atomic Actions** — Warsaw, Poland · €45-85/hr (directory-listed) · team 10-49 · founded 2024 · services: AI Automation, AI Consulting, AI Development · 5 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/atomic-actions
17. **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
18. **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
19. **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
20. **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
21. **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
22. **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
23. **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
24. **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
25. **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
26. **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
27. **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
28. **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
29. **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
30. **wegewerk** — Berlin, Germany · rate not published · services: AI Consulting, AI Development, Generative AI · 3 documented client engagements with source URLs · reviewed 2026-08-05 · https://www.aiagencies.eu/agency/wegewerk

## 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):
- 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
The consulting label covers several kinds of retainer here. Siili Solutions operates Bobotin for LähiTapiola Finance as a managed service: a retrieval-augmented agent that drafts customer-service replies from contract terms and leaves a person to send. Adnovum runs the managed service behind Gebäudeversicherung Bern's Berna voicebot, 2,700 claim calls a day at peak. Pexon Consulting builds in the client's tenant: Deutz's retrieval platform reached more than 5,000 users and cut freight-invoice checking from three days a batch to eight minutes. Version 1's AI Labs system for Foundation Risk Partners reviews policy documents against the broker's business rules and hands the summary to a human expert, with the client reporting gap analysis cut from 40 hours to 4.

A second group retains the data layer, not a model. Data Analytics runs managed Power BI environments, including a 40-million-row build for Deloitte, with no case of a model in production; Bismart's named quotes from Banc Sabadell and Segittur describe SQL Server and Power BI work under ongoing maintenance, its AI outcomes anonymous. A third is advisory: OstraconAI's Singa lead pipeline went live in week three and its Gosta Labs outreach retainer is documented as ongoing; Syncronika has run Sebach's web stack for fifteen years with no client AI deployment published.

Ask what the monthly fee retains: an operated model, a managed dataset or advisory hours. The first needs a runbook and a named person watching it; the second, a line between the reporting environment and the AI promised above it; the third, deliverables you can point at after the workshop. The curator's notes on Data Analytics, Bismart and Syncronika end in the same request: a reference where a model the team built is in use today.

## Questions buyers ask

### How many AI agencies work with retainer on ai consulting?
48 agencies in our directory combine verified retainer client evidence with documented AI Consulting work. The current top-ranked are Storm Technology, Lexunit, ontolux — 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 consulting?
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?
9 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