The coding agent built for enterprise

Deploy anywhere: on-premise, fully air-gapped, or in your secure cloud

What makes Cosine different?

Cosine isn’t just a coding agent. We’re also a machine learning research lab that post-trains AI models on high-quality human coding data, in collaboration with OpenAI.

The outcome? State-of-the-art coding accuracy, whether you’re on-premise or in the cloud. An agent tailored to your context and your code.

Run Cosine where you need it - on our cloud, your VPC, or fully on-premise, airgapped. Use your preferred models or custom-trained ones.

Explore our research

Optimized for on-premise:

We post-train any open-source model of your choice, optimising it specifically for coding. The result is maximum accuracy per GPU and full control over your infrastructure.

Best-in-class accuracy in the cloud:

Our default model - post-trained on GPT-5 - already outperforms OpenAI and Anthropic in coding accuracy and reliability.

Custom post-training for your context:

We can train a model on your own repos, frameworks, or specific languages (like COBOL or Fortran), creating an agent with a deep understanding of your internal systems and legacy code.

Got specific requirements? Tell us, and we'll meet them.

The impact our customers have seen

6x Increase in A/B testing through Cosine
12x Faster iteration on new features by junior developers
43 minutes Time taken to clear 10 days’ worth of backlog
7 weeks Time taken to move a mature 2 million line codebase to AWS

“Cosine shows what it looks like when AI works like a real-world developer. Genie 2 mirrors how engineers reason through complexity. It’s a foundational leap for software development.”
Laura Modiano, OpenAI Start-Ups EMEA lead

“ I definitely see Cosine as one of the leading contenders in agentic programming. Most others just can’t do it, and they're cracking the code. The way Cosine has fine-tuned their model is particularly impressive: it ensures that the agent actually behaves well and digests a lot of context, which other providers consistently struggle with.”
Nick Hughes, Technical Director

“Cosine fits perfectly with agile and buddy programming it’s like having an AI partner. Both junior and senior developers picked it up instantly. It’s boosted productivity and become part of our team.”
Cris Flagg, CEO, Flagg Consulting

How Customers Are Using Cosine

Asynchronous, multithreaded feature development
Comprehensive bug scanning, fixing and test writing
Large scale refactors and library updates
Rapid understanding of legacy or third-party repos ("research mode")
Task assignment and execution directly from Jira, Linear, Trello, Asana, Github, Slack, and more...
Auto-generated an always up-to-date documentation
CI/CD optimization & pipeline maintenance
Security-focused code fixes and compliance-aligned improvements
Migration and modernization of frameworks, services, and libraries
Review metrics showing impact of Cosine on developer productivity

Safety, Trust & Transparency

Cosine is built for enterprises where trust isn’t optional. Every line of code, every output, every decision is handled with the highest standards of security and compliance - far beyond what other AI tools can offer.

Your IP stays yours

All inputs and outputs remain your intellectual property.

Enterprise-grade compliance

SOC 2 attested, ISO 27001 aligned.

Full visibility

Audit logs and fine-grained access controls, built in.

Seamless integration

Works with your identity provider (IdP) for airtight access.

Zero data leakage

No training on shared models. Your code never leaves your environment.

Private deployments

On-prem or VPC air-gapped isolation options ensure full control.

Regulatory alignment

Designed for strict regimes like FINRA, HIPAA, ITAR, GDPR.

Red-team tested

Adversarial testing to prove resilience against attacks.

Encryption everywhere

Data is encrypted at rest and in transit with enterprise-grade keys.

Granular governance

Role-based access and policy enforcement tailored to sensitive orgs.

Customer-controlled retention

You decide what’s stored, for how long, or whether at all.

No shadow AI

No “mystery” training data, no co-mingling with public models.

Continuous compliance

Optional real-time monitoring and alerts on usage anomalies.

Defence-grade hardening

Designed to fit into zero-trust environments.

Get started

Download for Mac

Download for Mac](https://software.cosine.sh/desktop/release/latest/cosine-desktop-darwin-arm64.dmg)

Available for:

Download the CLI

curl -fsSL https://cosine.sh/install | bash