# Best AI Agents Agencies for Retainer Work > 11 agencies. Top-ranked: Hybrid Heroes, Syncronika, Faculty. Canonical page: https://www.aiagencies.eu/services/ai-agents/for/retainer Generated: 2026-10-03 · Curated by Gabor Kiss · No paid placements — inclusion, score, and rank are never sold. ## Ranked roster 1. **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 2. **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 3. **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 4. **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 5. **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 6. **VisualLabs** — Budapest, Hungary · €45-85/hr (directory-listed) · team 10-49 · founded 2017 · services: AI Automation, AI Agents, AI Consulting · 3 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/visuallabs 7. **Fantasy Space** — Madrid, Spain · €20-40/hr (directory-listed) · team 10-49 · founded 2020 · services: AI Development, AI Agents, AI Automation, AI Consulting · 3 documented client engagements with source URLs · reviewed 2026-09-09 · https://www.aiagencies.eu/agency/fantasy-space 8. **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 9. **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 10. **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 11. **The AI Consultancy** — London, United Kingdom · rate not published · services: AI Consulting, AI Development, Generative AI, AI Agents · 2 documented client engagements with source URLs · reviewed 2026-08-04 · https://www.aiagencies.eu/agency/the-ai-consultancy ## About this market An agent on retainer is a system someone keeps answering for after launch, and the operated agents documented on this page are fewer than the agencies offering them. Faculty's AgentAssist and MemberSummarise run inside Tide's customer-service workflows with a published 10% cut in ticket-handle time. Flobotics' bots move data between electronic health record systems for DocPlanner at more than 10,000 processes a month, 98% handled automatically; the foundation is robotic process automation, and the firm says so. Neurons Lab publishes a production agentic system for a capital-markets fintech with sub-30-second alert times, anonymized, beside a 20-language marketing system for Visa delivered in under two months. Grepton built a Teams chat agent for ANDA Present Group that answers staff from SharePoint documents and keeps salary data inside HR's permission group, with no usage figures published. Konversational's agents are ServiceNow's, implemented on the platform, so its Brightsolid rebuild reports incident and resolution times rather than agent behavior. Elsewhere the agent is the agency's own product or a next step. Mobile Reality's most inspectable agent is MR. Agent, the sales assistant on its own site; Syncronika's AgenVIO platform launched in April 2026 with no client deployment described; The AI Consultancy's MoverAI documents a 13-person test cohort rather than a running fleet. VisualLabs' published stories are Dynamics implementations with agents named as the next step, Hybrid Heroes' AI evidence is the generated audio tours in its Explory app, and Fantasy Space describes AI in how its software gets built rather than as the thing delivered. Ask what the monthly fee covers when the agent misbehaves: who reads the transcripts, who changes the prompts and tools, and how a change is tested before it reaches a customer. A platform partner answers inside the vendor's release cycle, a custom build inside yours. Where the agent is the agency's own product, ask for a client running it today before paying to maintain one. ## Questions buyers ask ### How many AI agencies work with retainer on ai agents? 11 agencies in our directory combine verified retainer client evidence with documented AI Agents work. The current top-ranked are Hybrid Heroes, Syncronika, Faculty — 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 agents? 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 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? 3 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. --- 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