# Best SaaS & B2B AI Agencies for Project-Based Work

> 38 agencies. Top-ranked: Square Root Solutions, Preste, ontolux.

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

## Ranked roster
Top 30 of 38 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. **Preste** — Paris, France · €45-85/hr (directory-listed) · team 10-49 · founded 2019 · services: AI Development, Generative AI, AI Consulting · 12 documented client engagements with source URLs · reviewed 2026-09-24 · https://www.aiagencies.eu/agency/preste
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. **Pixelette Technologies** — London, United Kingdom · €20-40/hr (directory-listed) · team 250+ · founded 2018 · services: AI Development, AI Agents, AI Consulting, Generative AI · 7 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/pixelette-technologies
5. **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
6. **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
7. **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
8. **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
9. **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
10. **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
11. **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
12. **10Clouds** — Warsaw, Poland · €45-85/hr (directory-listed) · team 50-249 · founded 2009 · services: AI Agents, AI Development, Generative AI · 5 documented client engagements with source URLs · reviewed 2026-09-03 · https://www.aiagencies.eu/agency/10clouds
13. **Indigo Labs** — Ljubljana, Slovenia · €45-85/hr (directory-listed) · team 10-49 · founded 2021 · services: AI Development, AI Automation, AI Agents · 5 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/indigo-labs
14. **App4You** — Gdańsk, Poland · €45-85/hr (directory-listed) · team 2-9 · founded 2021 · services: AI Agents, AI Automation, AI Development, AI Consulting · 5 documented client engagements with source URLs · reviewed 2026-09-09 · https://www.aiagencies.eu/agency/app4you
15. **Valletta Software Development** — Valletta, Malta · €45-85/hr (directory-listed) · team 50-249 · founded 2009 · services: AI Development, Generative AI, AI Agents · 5 documented client engagements with source URLs · reviewed 2026-09-24 · https://www.aiagencies.eu/agency/valletta-software
16. **Softblues** — London, United Kingdom · €45-85/hr (directory-listed) · team 10-49 · founded 2014 · 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/softblues
17. **Brights** — Warsaw, Poland · €20-40/hr (directory-listed) · team 50-249 · founded 2011 · services: AI Consulting, AI Development · 5 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/brights
18. **coompanion** — Munich, Germany · €85-130/hr (directory-listed) · team 2-9 · founded 2025 · services: AI Automation, AI Agents, AI Consulting · 5 documented client engagements with source URLs · reviewed 2026-09-20 · https://www.aiagencies.eu/agency/coompanion
19. **Alpdev** — Ljubljana, Slovenia · €45-85/hr (directory-listed) · team 2-9 · founded 2025 · services: AI Development, AI Automation, AI Agents · 5 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/alpdev
20. **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
21. **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
22. **Unlock Management** — Madrid, Spain · €45-85/hr (directory-listed) · team 10-49 · founded 2023 · services: AI Consulting, AI Agents, AI Development · 4 documented client engagements with source URLs · reviewed 2026-09-20 · https://www.aiagencies.eu/agency/unlock-management
23. **xtream** — Milan, Italy · €45-85/hr (directory-listed) · team 10-49 · founded 2018 · services: AI Development, AI Consulting · 4 documented client engagements with source URLs · reviewed 2026-09-03 · https://www.aiagencies.eu/agency/xtream
24. **TechnoLynx** — Budapest, Hungary · €85-130/hr (directory-listed) · team 10-49 · founded 2019 · services: AI Development, AI Automation · 4 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/technolynx
25. **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
26. **peoly** — Prague, Czech Republic · rate not published · team 10-49 · founded 2019 · services: AI Development, AI Automation, AI Video · 6 documented client engagements with source URLs · reviewed 2026-09-20 · https://www.aiagencies.eu/agency/peoly
27. **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
28. **Softspring** — Madrid, Spain · €50-75/hr (agency-confirmed) · team 2-9 · founded 2018 · services: AI Consulting, AI Development, AI Automation · 3 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/softspring
29. **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
30. **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

## 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):
- Alpdev vs Indigo Labs: https://www.aiagencies.eu/compare/alpdev-vs-indigo-labs

## About this market
Much of the documented SaaS work here is small, dated and stage-labeled. Softblues marks each flagship with the stage it reached: Roof Maker's eight-agent voice line is live, answering every support call and logging HubSpot tickets, while SofiaHR's assessment pipeline, ten fine-tuned Gemini Flash models at 90%+ agreement with expert analysts, is in beta across 10 clients and 300+ interviews a week. Indigo Labs publishes duration, team size and budget per project; its ESG ON platform for RISO pre-fills EU reporting templates, reported at a 70% cut in analysis time and described as an MVP in testing. Valletta Software Development built NLP models on GPT and BERT for Autobound.ai with A/B-tested variants, reported at 20% higher open rates. OstraconAI's inbound pipeline for Singa went live in week three and cut manual lead sorting from 45 minutes a day to single digits. Square Root Solutions' Druid Learning build runs larger: a content-intelligence platform using transformer classifiers and spaCy across 140+ languages, at 500k+ assets processed, which the client's testimonial calls the indexing and categorization engine its product depends on.

For a product team buying a scoped build, ask where the deliverable sits: inside a product paying users touch, or in an internal workflow on accounts the agency owns. Then ask for the stage label and what came with the handover, since MVPs and betas sit next to a few live systems here and several published team sizes run one to three people per project. Read the tags against the evidence: Data Analytics documents dashboard work with no model in production, App4You's freight agent for INF Shipping Solutions is described as work under way, not a delivered case, and Fast Data Science's published work is NLP for pharma and public bodies.

## Questions buyers ask

### How many AI agencies work with project-based on saas & b2b?
38 agencies in our directory combine verified project-based client evidence with documented SaaS & B2B work. The current top-ranked are Square Root Solutions, Preste, 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 saas & b2b?
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 project-based model verified?
Every agency here documents project-based 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 project-based 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