AI/Up and coming

Cosine

UK sovereign AI lab training Lumen coding models and agents that run in secure or air-gapped environments.

Why it's here

In Jun 2026 formed a coalition with UK industry leaders to build Lumen Sovereign, and lists BAE Systems, HSBC and Lloyds Banking Group among its partners.

source: cosine.sh

Focus: Coding agents
Founded: 2022
Latest round: Seed, $2.5M, Aug 2024
Staff (Companies House accounts): 13, average over the period to 31 Dec 2025source: find-and-update.company-information.service.gov.uk
London office: Room 2.04, 81 Rivington Street, Hackney EC2A 3AYsource: find-and-update.company-information.service.gov.uk
London presence: HQsource: api.ashbyhq.com
Investors: SOMA Capital (lead), Uphonest Capital (lead), Focal, Lakestarsource: siliconangle.com
Accelerator: Y Combinator W23source: ycombinator.com
Area: Shoreditch & Old Street
Nearest station: Shoreditch High Street, 399 m
Companies House: BUILDT AI LIMITED (14547479, active)Incorporated 19 Dec 2022 · SIC 62012
Hiring: 2 open roles in London ↗Public job board, checked 9 Oct 2026
Work model: On-site (from 2 London job posts)Current job posts only, checked 9 Oct 2026. Howsource: jobs.ashbyhq.com
Visas: Licensed visa sponsor, listed as Buildt AI Limited t/a Cosinesource: gov.uk

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