COMPANY PROFILE · UPDATED 01 AUG 2026

Cosine

Cosine - Your AI Co-developer Ask complex coding questions, get explanations about features and plan new code just by asking our AI in plain English TLDR: Cosine is an AI knowledge engine that understands your codebase better than you do,…

San Francisco, CA

cosine.sh ↗

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Founded: 2022
Headcount: 8
Open roles: 5
Last raised: Seed

LOCATIONS

Where they work

Cosine offices

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San Francisco, CA1460 Mission Street

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FUNDING

Capital raised

Total raised

$3,534,426

Investors

Y Combinator Soma Capital Focal Gaingels John Spindler Lakestar UpHonest Capital Warrick Shanly

Funding rounds

Series Unknown
Gaingels
$534.4KJan 2, 2026
Seed
Soma Capital, UpHonest Capital, Focal, Lakestar, Warrick Shanly
$2.5MAug 11, 2024
Pre Seed
Y Combinator, John Spindler, UpHonest Capital
$500KOct 31, 2022

Funding data via Diffbot, SEC EDGAR filings and company announcements — a round from a filing or announcement links to it

TECH STACK

How Cosine builds

Extracted from Cosine’s job postings we’ve tracked

×N is how many of Cosine’s open roles mention that technology.

DevOps & Infrastructure

Docker×3 Docker/Kubernetes×3 AWS Cloud Development Kit×2 Helm×2 Pulumi×2 Terraform×2 GitHub

Cloud Platforms

Amazon Web Services×3 Amazon ECS×2 Amazon EKS×2 AWS Fargate×2 Google Cloud×2 Microsoft Azure×2

Programming Languages

Go×3 Python×3 TypeScript×3

Monitoring & Observability

Grafana×3 OpenTelemetry×2 Prometheus×2

Databases

Redis×2

OPEN ROLES

Hiring at Cosine

LEADERSHIP

Founders & key people

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