# AI Developer Tools startups in the UK

AI startups building the tools engineers use to ship software: code generation, review, testing, DevOps and backend infrastructure. Several of the fastest-growing names in AI dev tooling have chosen the UK for European engineering.

10 companies · 42 open UK & remote roles

## Companies

- [Cursor](https://aistartupslist.co.uk/company/cursor.md) · London · Series D · 8 roles. AI code editor opening its European HQ in London.
- [Diffblue](https://aistartupslist.co.uk/company/diffblue.md) · Oxford · Series A. Oxford spinout using AI to auto-generate Java unit tests.
- [Kubiya](https://aistartupslist.co.uk/company/kubiya.md) · Remote · Seed. AI teammates that automate DevOps tasks for engineering teams.
- [Unbody](https://aistartupslist.co.uk/company/unbody.md) · Remote · Seed. Modular AI backend stack for developers building AI software.
- [Cosine](https://aistartupslist.co.uk/company/cosine.md) · London · Seed · 3 roles. Y Combinator-backed maker of Genie, an autonomous AI software engineer.
- [Vercel](https://aistartupslist.co.uk/company/vercel.md) · London · Series E · 16 roles. Frontend cloud and maker of Next.js and the v0 AI app builder.
- [Tessl](https://aistartupslist.co.uk/company/tessl.md) · King's Cross · Series A · 5 roles. Spec-driven development platform where engineers define specs and AI agents build, test and maintain the code.
- [Meticulous](https://aistartupslist.co.uk/company/meticulous.md) · London · Seed · 7 roles. AI that automatically writes and maintains end-to-end frontend browser tests without engineers writing them.
- [Tekton Dynamics](https://aistartupslist.co.uk/company/tekton-dynamics.md) · London · Seed · 2 roles. AI agents that stress-test and quality-assure other AI products; YC W24, founded by Oxford and Imperial PhDs.
- [cubic](https://aistartupslist.co.uk/company/cubic.md) · London · Seed · 1 roles. AI-powered code review platform that learns your codebase, flags bugs and helps teams merge pull requests faster (YC X25).