# Best SaaS & B2B AI Agencies for Team Extension

> 17 agencies. Top-ranked: Old St Labs, Square Root Solutions, Pixelette Technologies.

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

## Ranked roster
1. **Old St Labs** — London, United Kingdom · €45-85/hr (directory-listed) · team 50-249 · founded 2020 · services: AI Development, AI Consulting · 10 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/old-st-labs
2. **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
3. **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
4. **Vention** — London, United Kingdom · €45-85/hr (directory-listed) · team 1000+ · founded 2002 · services: AI Development, AI Consulting, AI Agents · 10 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/vention
5. **Transparity** — London, United Kingdom · €85-130/hr (directory-listed) · team 250+ · founded 2015 · services: AI Consulting, AI Development, AI Automation, AI Agents · 8 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/transparity
6. **Marionete** — London, United Kingdom · €45-85/hr (directory-listed) · team 10-49 · founded 2016 · services: AI Consulting, AI Development · 6 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/marionete
7. **Opinov8** — London, United Kingdom · €45-85/hr (directory-listed) · team 250+ · founded 2017 · services: AI Consulting, AI Development, AI Agents, Generative AI · 6 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/opinov8
8. **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
9. **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
10. **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
11. **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
12. **N-iX** — London, United Kingdom · €45-85/hr (directory-listed) · team 1000+ · founded 2002 · services: AI Consulting, AI Development, Generative AI, AI Agents · 4 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/n-ix
13. **Datamole** — Prague, Czech Republic · rate not published · team 50-249 · founded 2015 · services: AI Development, AI Consulting, AI Automation · 4 documented client engagements with source URLs · reviewed 2026-09-20 · https://www.aiagencies.eu/agency/datamole
14. **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
15. **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
16. **R-Szoft** — Budapest, Hungary · €20-40/hr (directory-listed) · team 10-49 · founded 2018 · services: Generative AI, AI Automation, AI Consulting · 3 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/r-szoft
17. **Twistag** — Lisbon, Portugal · €45-85/hr (directory-listed) · team 10-49 · founded 2016 · services: AI Agents, AI Development, AI Automation · 2 documented client engagements with source URLs · reviewed 2026-09-09 · https://www.aiagencies.eu/agency/twistag


## About this market
SaaS companies are the natural buyers of an embedded team, and long engagements are what this page documents. Vention's five-person team worked four years on EliseAI's leasing assistant, three engineers spent three years on Comet's ML experiment-tracking platform, and four engineers scaled Verfacto's customer-journey analytics over eighteen months; Staircase AI's CTO describes developers added to the core team under a team-extension model. 10Clouds has placed ML engineers on Trust Stamp's face-embedding, proof-of-liveness and KYC work for more than five years under the client's data-science lead. Valletta ran an outsourced ML team for Autobound.ai, NLP models on GPT and BERT with A/B-tested variants, reported at 20% higher open rates. Opinov8 placed Kubernetes, Go and React engineers across several Kubeshop open-source teams at a reported 20% cost saving. Brights shipped a multi-agent RAG consultant to the Kadroland and 7eminar training platforms in three months after a Telegram proof of concept graded on 250 expert questions. Softblues built the copilot inside Agrotop's farm-management SaaS and the platform under it; Old St Labs describes a team of 10 on Livis Analytics from September 2025 to February 2026, pre-launch. The caveat runs through the page: in the Vention studies AI is a feature line or a coding assistant, and the curator asks Brights and Softblues for post-launch figures.

For a product company the sorting question is ramp. Kafene's Vention team went from two to seven engineers; Comet's stayed at three for three years. Ask how the team scales with your roadmap, whether the engineers named at kickoff are still on the platform in year two, and who owns the model once the feature ships.

## Questions buyers ask

### How many AI agencies work with team extension on saas & b2b?
17 agencies in our directory combine verified team extension client evidence with documented SaaS & B2B work. The current top-ranked are Old St Labs, Square Root Solutions, Pixelette Technologies — 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 €20–130 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 team extension model verified?
Every agency here documents team extension 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 team extension engagements deliberately.

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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