Top 30 of 34 · updated 2026-11-01

Best Voice AI agencies in the UK (2026)

34 agencies in our directory are based in the UK and name Voice AI work on their own websites: AI phone and voice agents (Vapi, Retell, ElevenLabs and similar). 3 are listed in an official partner directory and 10 publish pricing. Besides Voice AI, they most often build with OpenAI, Claude, n8n, and the work they describe most is Voice agents, CRM automation/sync, Data integration/ETL. Below are the top 30, ordered by Cofounderbase Score (median 43).

Ranked by evidence

flowio · score 80 · Glasgow: published case studies, deep tool stack, transparent pricing and team.
Techdome Solutions Private Limited · score 68: published case studies, deep tool stack, transparent pricing and team.
Agenix AI · score 61: official partner listing, deep tool stack.
Fifty One Degrees · score 60 · London: published case studies, deep tool stack, transparent pricing and team.
OpsCopilot · score 60 · London: official partner listing, active in 2026.

#	Agency	Location	Builds with	Services they list	Score
1	flowio	Glasgow, United Kingdom	n8n, Zapier, Airtable	Workflow Automation Services · AI Voice Agent Development	80
2	Techdome Solutions Private Limited	United Kingdom	n8n, Make, Zapier	Self-Hosted n8n Docker Kubernetes Deployment · Delivery and audit trail	68
3	Agenix AI Partner	United Kingdom	n8n, OpenAI, HubSpot	Lead generation · CRM automation/sync	61
4	Fifty One Degrees	London, United Kingdom	Relevance AI, OpenAI, Claude	CRM automation/sync · Chatbots	60
5	OpsCopilot Partner	London, United Kingdom	Zapier, HubSpot, Salesforce	OPSCOPILOT	60
6	Codex Solutions International Partner	United Kingdom	Make, Zapier, Airtable	Business Process Automation · Make.com Scenario Development	57
7	Softomate Solutions	London, United Kingdom	Power Automate, GoHighLevel, OpenAI	CRM automation/sync · Chatbots	54
8	AI Agency Manchester	United Kingdom	n8n, OpenAI, Claude	AI Automation · AI Voice Agents	53
9	Kuhnic AI	London, United Kingdom	n8n, OpenAI, Claude	Application Development Application Development · Application Development	51
10	Expedient AI	Bristol, United Kingdom	OpenAI, Claude	Lead generation · CRM automation/sync	49
11	AI Agency Plus	Leeds, United Kingdom	OpenAI, Claude	Business Process Automation	47
12	unicrew formerly Artelogic	United Kingdom	OpenAI, Claude	AI Integration & Agents → · Custom Software Development →	47
13	Antek Automation	Andover, United Kingdom	n8n, Retell AI, OpenAI	AI Voice Agents · AI Chatbots	46
14	Softblues	London, United Kingdom	OpenAI, Claude, HubSpot	Make your company AI-native · Automate a costly process	45
15	TECHSY	United Kingdom	n8n, LangChain, OpenAI	Repetitive work, automated · Content that ships itself	45
16	Aristral	Bristol, United Kingdom	n8n, Zapier, LangChain	AI Chatbots & RAG · Workflow Automation	43
17	Plexo Logic	United Kingdom	n8n, Zapier, OpenAI	Web, SEO and server infrastructure	43
18	Takeaway Reality	London, United Kingdom		AI voice translation system · AI Chatbot development for Peugeot	43
19	Tustra	United Kingdom	OpenAI	AI Training & Coaching · AI Consulting	43
20	NeverMiss	Nottingham, United Kingdom	n8n, Zapier, GoHighLevel	BACK-OFFICE AUTOMATION	40
21	sizrok	Manchester, United Kingdom	OpenAI, Claude, HubSpot	Workflow agents · Data layer	39
22	The Bot Forge	London, United Kingdom	Voiceflow, OpenAI, Claude	Chatbots · Document processing	37
23	FlairCross	United Kingdom	n8n, Zapier, OpenAI	Specialized Automation Services · End-to-End Automation	36
24	Attenda Agents	London, United Kingdom	Vapi, OpenAI	Lead generation · Chatbots	35
25	blackthorn.ai	London, United Kingdom		CRM automation/sync · Voice agents	35
26	Xiilio	London, United Kingdom	GoHighLevel, OpenAI	AI Data Usage	30
27	ORYX AI Automations	Solihull, United Kingdom	OpenAI, Claude	AI consultants, not software vendors. · Consult	28
28	Sidekiq AI	London, United Kingdom	HubSpot, Salesforce	24/7 AI Receptionist · CRM Reactivator	18
29	Oyik.AI	London, United Kingdom		AI Voice & Chat Agents · Autonomous AI Agents	13
30	Applegate Business Services	United Kingdom		Lead generation · CRM automation/sync	6

How we built this list

We started from every verified agency in the Cofounderbase directory, kept the ones based in the UK whose own website names Voice AI work, and ordered them by Cofounderbase Score. The score combines tool stack depth, published evidence such as case studies and reviews, official partner listings, transparency and freshness, all from public sources. Rank is never sold. Read the full method.

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Broader lists

Best AI automation agencies in United Kingdom (99)Best Voice AI agencies (242)

Other tool and country lists

n8n agencies in the UK (26)Voice AI agencies in the US (70)AI Chatbot agencies in Australia (26)n8n agencies in the US (54)n8n agencies in India (33)Voice AI agencies in India (29)AI Chatbot agencies in India (45)n8n agencies in Australia (24)n8n agencies in France (33)Zapier agencies in India (27)Voice AI agencies in Australia (19)n8n agencies in Germany (20) All lists

Questions

Which is the best Voice AI agency in the UK?

By Cofounderbase Score, flowio ranks first (80/100), followed by Techdome Solutions Private Limited (68) and Agenix AI (61). The best fit still depends on your stack, budget and timeline.

How is this list ranked?

By Cofounderbase Score: stack depth, published evidence (case studies, outcomes, reviews), official certification, transparency and freshness, all taken from public sources. Rank is never sold. The Featured slot at the top is a labelled sponsored placement and is not part of the ranking.

How many Voice AI agencies are there in the UK?

34 verified agencies as of 2026-11-01. 3 are official partners and 10 publish pricing.

Can I get help choosing?

Yes. Describe your project on the Matcher page and we suggest three agencies from the directory. It is free and needs no account.

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Describe the project. We read every brief and introduce you to three agencies from this index that fit it, usually within 2 working days. Free for buyers; agencies can't pay to be picked.