# Voice & Conversational AI startups in the UK

AI startups building the voice and conversational layer: speech, voice agents, assistants and AI customer service. The UK is home to some of the strongest voice-AI research and products in the world.

13 companies · 221 open UK & remote roles

## Companies

- [ElevenLabs](https://aistartupslist.co.uk/company/elevenlabs.md) · Soho · Series D · 112 roles. AI voice generation and text-to-speech for the digital world.
- [Speechmatics](https://aistartupslist.co.uk/company/speechmatics.md) · Cambridge · Series B · 7 roles. Speech-to-text and voice AI for real-time transcription in every language.
- [PolyAI](https://aistartupslist.co.uk/company/polyai.md) · Paddington · Series D · 4 roles. Builds human-like enterprise voice AI agents for customer service.
- [Sierra](https://aistartupslist.co.uk/company/sierra.md) · London · Series B · 44 roles. Conversational AI agents transforming customer service.
- [ConnexAI](https://aistartupslist.co.uk/company/connexai.md) · Manchester · Series C. AI platform automating customer support across voice and digital channels.
- [Fyxer](https://aistartupslist.co.uk/company/fyxer.md) · London · Series B · 1 roles. AI executive assistant that organises inboxes, drafts email replies and writes meeting notes automatically.
- [Plain](https://aistartupslist.co.uk/company/plain.md) · London · Series A · 4 roles. AI-native customer support platform built for scaling B2B teams across Slack, chat and email.
- [Elyos AI](https://aistartupslist.co.uk/company/elyos-ai.md) · London · Seed · 6 roles. AI customer service agents that handle calls, book jobs and manage diaries for trades and field-service businesses.
- [Zenning AI](https://aistartupslist.co.uk/company/zenning-ai.md) · London · Seed. Deploys proactive AI employees inside Slack and Teams that automate workflows and complete real tasks.
- [Zuni](https://aistartupslist.co.uk/company/zuni.md) · London · Seed. Chrome sidebar extension giving contextual AI assistance, drafting emails and replies across your browser tabs (YC S24).
- [Dave Communication](https://aistartupslist.co.uk/company/dave-communication.md) · London · Seed. AI receptionist and business-memory phone system that answers calls, quotes prices and books jobs for trades and service businesses.
- [fonio.ai](https://aistartupslist.co.uk/company/fonioai.md) · London · Seed · 16 roles. Vienna voice-AI firm building out a London office; AI phone agents that answer and place business calls in real time.
- [NiCE](https://aistartupslist.co.uk/company/nice.md) · City of London · Public · 27 roles. Israeli CX software firm with City and Southampton offices; its CXone Mpower platform runs agentic AI agents for contact centres.