The Telegraph · Jun 2026
Telegraph coverage of Cosine and Lumen Sovereign, highlighting the company’s push toward sovereign UK AI infrastructure and its positioning as an alternative to restricted US options.
Company research
Public company, workplace, funding, and market signals
Updated Jul 30, 2026
Overview
Cosine (Buildt AI Limited) is a London-based, YC-backed AI software company building Lumen/Genie, an autonomous coding agent and model system for production software engineering. Its product spans CLI, desktop, cloud, and enterprise air-gapped deployments, with an explicit emphasis on maintainable code, legacy systems, and sovereign/security-sensitive use cases.
Primary product
Lumen / Genie autonomous AI coding agent for production software engineering
Founded
2022
Headquarters
London, United Kingdom
Team size
20-30
Work style
Onsite
Industry
Software Development
Sub-industry
AI software engineering agent / generative AI software
Offices
London, United Kingdom
San Francisco, United States
Business model
subscription SaaS
workspace credit-based usage
enterprise custom licensing
private deployment licensing
Funding
People & investors
Leadership
CEO & Co-Founder
Co-Founder
Co-Founder & COO
Head of Engineering
Head of Marketing
Head of Growth
Ops Lead
Work & culture
Cosine describes itself as in-office by design and values direct communication, ownership, high standards, and practical progress over theatre. The company also emphasizes ambitious work, maintainability, collaboration, and wellbeing.
Work style
Onsite
Compensation
Publicly stated compensation signals include competitive monthly salaries, eligible share options, and a workplace pension via NEST. No public salary bands were found.
Benefits
competitive salaries
paid monthly
share options
workplace pension via NEST
salary sacrifice pension arrangement
Cycle to Work scheme
weekly free meals in office
unlimited snacks and drinks
pet-friendly office
monthly team breakfasts
Product & market
Pricing
Subscription pricing with task/credit allowances for individuals and teams, plus custom enterprise pricing for VPC/on-prem/private deployments.
Differentiators
- —trained on real production code from engineering teams
- —focus on maintainable, readable, production-quality code
- —strong niche/legacy language support including COBOL, Fortran, Verilog and SQL
- —supports cloud, VPC, single-tenant and fully air-gapped deployments
- —autonomous agent workflow that plans, writes, tests and submits PRs
- —multi-surface experience across CLI, desktop and cloud
- —sovereign AI positioning for security-sensitive and regulated customers
Technology
Python
Go
PyTorch
Kubernetes
Docker
Terraform
GitHub
GitLab
React
TypeScript
Vercel
Cloudflare
Redis
Elasticsearch
Grafana
Prometheus
Datadog
Helm
SQS
Google Workspace
Customers
defence
finance
government and public sector
healthcare
critical infrastructure operators
regulated enterprise software teams
large engineering organizations with complex codebases
Competitors
Cognition
Augment
Tabnine
GitHub Copilot
Cursor
Anthropic Claude Code
Scale & contact
Estimated revenue
$1M-$10M
Estimated monthly visits
45.7K
Traffic estimate as of Jun 2026
Latest news
City A.M. · Jun 2026
Reports the industry coalition behind Lumen Sovereign and the blue-chip backing from major UK institutions, alongside the wider sovereign compute push.
Innovation News Network · Jun 2026
Covers the plan to train Lumen Sovereign on Isambard-AI under the UK government’s sovereign AI programme, with late-2026 deployment targeted.
UK Government · Apr 2026
Official government announcement naming Cosine among the first recipients of Sovereign AI support and compute access.
Tech.eu · Aug 2024
Covers Cosine’s seed round and identifies the main backers, including UpHonest Capital and Soma Capital.
Jobs and careers at Cosine
2 jobs at Cosine
Founding Head of Public Sector
On-site
GTM
London Office
2mo ago
On-site
Full-time
Product Engineer
On-site
Product & Engineering
London Office
7mo ago
On-site
Full-time