# Cosine

**Source:** https://geo.sig.ai/brands/cosine  
**Vertical:** Infrastructure  
**Subcategory:** Cloud Services  
**Tier:** Emerging  
**Website:** cosine.sh  
**Last Updated:** 2026-04-14

## Summary

YC W23 autonomous software engineering agent with 72% SWE-Lancer score; Genie model enabling parallel ticket execution competing with Devin and GitHub Copilot Workspace for AI coding automation.

## Company Overview

Cosine is a San Francisco-based AI software engineering company building autonomous coding agents that enable development teams to work on multiple software tickets simultaneously — with the AI agent handling implementation tasks in parallel while engineers focus on architecture, code review, and product decisions. Founded by Yang Li, Alistair Pullen, and Sam Stenner and backed by Y Combinator (W23) with $3 million raised, Cosine's Genie model achieved 72% on SWE-Lancer and 30.08% on SWE-Bench, competitive benchmarks that position it among the highest-performing autonomous coding agents.

Cosine's Genie autonomous engineering agent works by taking a software ticket (bug report, feature request, or task description), understanding the codebase context, writing code that implements the requested change, and submitting a pull request for human review — executing the same workflow a human engineer would follow but in parallel with other agents working on other tickets simultaneously. The parallel execution unlocks engineering throughput that is impossible with human-only teams: a team of 5 engineers effectively becomes a team of 50 when each engineer can review and merge AI-submitted PRs rather than writing every line themselves.

In 2025, Cosine competes in the autonomous AI coding agent market with Devin (Cognition AI's autonomous software engineer, the category pioneer), GitHub Copilot Workspace (Microsoft's agent mode for Copilot), Cursor (AI code editor with agent features), and SWE-Agent (Princeton research agent) for autonomous software development automation. The SWE-Bench benchmark (measuring agent ability to resolve real GitHub issues from open-source projects) has become the standard measure for coding agent performance — and Cosine's competitive benchmark results on SWE-Lancer (measuring commercial freelance coding tasks) position it as a serious competitor. The 2025 strategy focuses on enterprise engineering team deployments, improving agent performance on complex multi-file refactors, and building the code review and merge automation that turns AI code submissions into shipping features.

## Frequently Asked Questions

### What is Cosine?
Cosine is a San Francisco-based AI company that builds fully agentic software engineering AI solutions. Founded in 2023, they develop autonomous AI software developers capable of working on multiple tickets simultaneously and asynchronously.

### What products and services does Cosine offer?
Cosine offers an agentic AI software engineer that enables fully automated ticket completion with instant parallel work capability. Their flagship product, Genie 2, achieves 72% performance on SWE-Lancer and 30.08% on SWE-Bench benchmarks.

### Who are Cosine's target customers?
Cosine targets software engineering teams and development organizations. Their solution addresses engineering capacity challenges through autonomous development capabilities.

### When was Cosine founded?
Cosine was founded in 2023. The company participated in Y Combinator's Winter 2023 (W23) batch.

### Where is Cosine headquartered?
Cosine is based in San Francisco, California, USA.

### How much funding has Cosine raised?
Cosine has raised $3M in total funding, including a $2.5M seed round in August 2024. The seed round was led by UpHonest Capital and Soma Capital, with participation from Lakestar and Focal.

### What are Cosine's key performance achievements?
Cosine's Genie 2 achieves 72% performance on SWE-Lancer and 30.08% on SWE-Bench, beating Devin. The company claims their solution outperforms OpenAI and Anthropic, positioning it as the world's best AI software engineer.

### What technology approach does Cosine use?
Cosine uses a fully agentic, autonomous AI approach for software engineering. Their technology enables instant asynchronous work on multiple tickets simultaneously, delivering fully automated ticket completion.

### Who founded Cosine?
Cosine was founded by Yang Li, Alistair Pullen (CEO), and Sam Stenner.

### What are Cosine's recent developments?
In August 2024, Cosine raised a $2.5M seed round led by UpHonest Capital and Soma Capital. They achieved 72% SWE-Lancer performance with Genie 2 and 30.08% on SWE-Bench, surpassing competitors like Devin and claiming to outperform OpenAI and Anthropic.

## Tags

ai-powered, b2b, developer-tools, infrastructure, platform, cloud-native, saas

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*Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*