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What is Cosine?

Cosine is an AI software engineering agent that integrates seamlessly into your team’s workflow. It retrieves context, plans solutions, writes and tests code, and collaborates in real time.

Cosine is an AI software engineering agent designed to integrate seamlessly into your team’s workflow.

It autonomously retrieves context, plans solutions, writes and tests code, and collaborates in real time or asynchronously – freeing your engineers to focus on innovation instead of repetitive tasks.

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How Cosine works in practice

Cosine was built for teams with large, existing codebases. While many AI tools focus on "0 → 1" code generation (spinning up a website, app, or script from scratch), Cosine is designed for the harder problem: navigating, maintaining, and improving complex production systems.

Cosine’s proprietary model, called Genie, is post-trained specifically for software engineering tasks. It doesn’t just autocomplete code — it:

  • Reads and understands unfamiliar repos

  • Plans how to solve issues

  • Writes and executes code in a secure sandbox

  • Runs tests and validates outputs

  • Submits a pull request for human review

That means you can assign Cosine work in Jira, GitHub, or Slack the same way you would assign it to an engineer. Cosine works in the background, and when you come back, you’ll see a ready-to-review PR.

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Why does this matter?

  • Productivity at scale: Teams throw entire backlogs at Cosine and see 30–40% of issues resolved — tasks that otherwise wouldn’t get touched.

  • Enterprise-ready: Runs in the cloud, VPC, or fully on-premise (air-gapped if required). No code ever needs to leave your environment.

  • Proven internally: Cosine’s own team uses Cosine heavily. Since June, over 1,700 PRs have been merged using Cosine — an output far beyond what a 20-person team would normally achieve.

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How is Cosine different from copilots?

  • Not in your IDE: Cosine isn’t something you watch line-by-line. It’s an agentic teammate, not a typing assistant.

  • Autonomous loop: Cosine plans, executes, tests, and validates before asking for review.

  • Works asynchronously: Fire off 10 tasks, walk away, and come back to 10 PRs.

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Who uses Cosine?

Cosine is trusted by financial institutions, defense contractors, and hyperscalers with strict security requirements. Enterprise deployments include fully air-gapped on-prem systems, where Cosine trains on niche languages (e.g. Verilog, VHDL) that frontier models don’t handle well.

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Next steps

If you’re curious:

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