Startup · United Kingdom
Cosine
HQ San Francisco, United Kingdom11-50 employeesUpdated
Cosine trains AI models and specialised coding agents for organisations that need frontier capability within secure environments.
Funding4 rounds · $3.5M
- Equity raised
- $3.5M
- Latest
- $534KStage undisclosed · Jan 2, 2026
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Jan 2, 2026 | Undisclosed | $534K | — | — | — | Reported |
| Aug 13, 2024 | Seed | $2.5M | — | Soma Capital, UpHonest Capital | Focal, Lakestar | Reported |
| Apr 1, 2023 | Seed | Undisclosed | — | — | — | Reported |
| Nov 1, 2022 | Pre-Seed | $500K | — | Y Combinator | — | Reported |
- Undisclosed$534KJan 2, 2026
- $2.5MAug 13, 2024
- SeedUndisclosedApr 1, 2023
- Pre-SeedLed by Y Combinator$500KNov 1, 2022
Raised counts equity rounds; debt, secondary sales and grants are totaled separately. Amounts in other currencies are converted at the announcement month's average rate. A ~ marks an estimated or converted amount.
Systems2
Newest unveiled first. Systems that belong to a government program link to the program page, where variants, costs and contracts are.
People3
| Person | Role |
|---|---|
| Alistair Pullen · LinkedIn ↗ | Co-Founder |
| Sam Stenner · LinkedIn ↗ | Co-Founder and CTO |
| Yang Li · LinkedIn ↗ | Co-Founder |
Sources7
Profile1
- 1
Sixth-Domain · Supports Organization · country, Organization · kind
“{"country": "UK", "hq_iso2": "GB", "id": "c0d161ad-a48b-4fbb-820d-cbfe62ef6eb4"}”
Systems2
- 2
Cosine · Supports Organization · description, Organization · linkedin url, Organization · name, Organization · website, System
“Cosine trains AI models and specialised coding agents for organisations that need frontier capability within secure environments.”
- 3CompanyCosine CLI | Cosine
Cosine · Supports System
“Cosine CLI brings agentic engineering into your shell. Work alongside your editor, tests, package manager, and project-specific tools”
Funding3
- 4
BusinessCloud · Aug 13, 2024 · Supports Funding round, Funding round · amount, Organization · ownership
“raised the funds from SOMA, Uphonest, Lakestar and Focal, among others”
- 5
LinkedIn · Supports Funding round, Organization · employee range
“funding round: Seed Round, 2023-04-01”
- 6
The SaaS News · Supports Funding round
“The round was led by Uphonest and SOMA Capital”
People1
- 7
Crunchbase · Supports Organization · employee range, Organization · hq city, Organization · x url, Role
“employee_range: 11-50 (profile: 11-50)”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.