Tessl
Platform for building, testing and sharing skills and context that guide AI coding agents like Claude Code and Cursor.
tessl.io ↗Why it's here
Raised $125M across seed and an Index-led Series A at a $750M valuation in Nov 2024.
source: siliconangle.com- Focus
- AI Coding Agents
- Founded
- 2024
- Total raised
- $125Msource: siliconangle.com
- Latest round
- Series A, $100M, Nov 2024
- London office
- 210 Pentonville Road, Islington N1 9JYsource: tessl.io
- London presence
- HQsource: tessl.io
- Investors
- boldstart ventures (lead), GV (lead), Index Ventures (lead), Accelsource: siliconangle.com
- Area
- King's Cross
- Nearest station
- King's Cross & St Pancras International, 247 m
- Hiring
- 5 open roles in London ↗Public job board, checked 9 Oct 2026
- Work model
- Hybrid (from 5 London job posts)Current job posts only, checked 9 Oct 2026. Howsource: jobs.ashbyhq.com
- Visas
- Licensed visa sponsor, listed as Tessl AI Limitedsource: gov.uk
Verified 30 Sep 2026. How we verify · Suggest a fix
For Tessl
Work here? Show you're on the map. Add the badge to your site or README, or share the listing.
<a href="https://londonmempool.co.uk/c/tessl"><img src="https://londonmempool.co.uk/badge/tessl.svg" alt="Tessl is listed on London Mempool" width="338" height="28"></a>
Add ?theme=light to the image URL for light backgrounds.
Same building
One more company on the map lists this office address.