AI engineering you control.

Hand off complex coding tasks without sacrificing maintainability or visibility.

Download for Mac

macOS Windows

Linux

Cosine CLI

brew install CosineAI/tap/cos

Docs

cosine·Configure production deployment with Argo

pz/dev›_⇄

cosine·Configure production deployment with Argo

Cosine 2m

Thinking…should be manageable. I'll use grep for a focused search…

Work where you already are

The same autonomous engineer across desktop, cloud, and terminal.

cosine — session

Type, paste or import your task…

Desktop

Start in the Cosine app

A richer workspace for active engineering: multi-window workflows, visible agent state, reviewable changes, and a clean bridge into cloud execution.

/desktop

cosine.sh/platform

Auth Refactor

OPEN

Cloud

Collaborate in the cloud

Run work in parallel, keep long-running tasks moving, and give engineers, PMs, and stakeholders one shared place to plan, review, and ship.

/cloud

tmux — ~/w/cosine

What was removed:

Ready · 3 files +34 −339204.6k↑ · 32.9k↓

Terminal

Keep going in the terminal

Stay in a terminal-native workflow with local-to-remote execution, MCP tool access, project context, and multi-agent orchestration from the command line.

/cli

Trusted by Engineers at

Unlock value at every stage of the SDLC

Work scoping & management

Triage and de-duplicate backlog items, cluster related work into coherent packages, estimate effort from historical data, propose owners based on expertise, and produce short execution plans with risks and acceptance criteria.

CLI

Terminal-native · scriptable · composable

Desktop

you are here

Multi-window · active work · platform-connected

Cloud

Remote agents · parallel execution · cross-device

One account · one toolchain · no migration
Move between surfaces any time

Start local. Scale when you're ready.

Cosine is one product across three surfaces: CLI, Desktop, and Cloud. Each extends the last — nothing is thrown away when you go further.

The desktop is the hub. When you want to run tasks overnight, spin up 20 agents in parallel, or keep working from your phone while your laptop runs a long job — the cloud is already connected. Same account, same context, no migration.

→
CLI for terminal-native power users and scripting
→
Desktop for rich interaction, multi-window, visibility
→
Cloud for parallel agents, remote execution, cross-device continuity
→
All three share the same account and model settings

Explore the cloud

Enterprise deployment

Built to fit your security environment.

Start quickly in Cosine Cloud, or move into a dedicated tenant or fully air-gapped deployment when your infrastructure, data, and compliance requirements demand it.

Public cloud

Managed single-tenant

Air-gapped

* Onboard today

Public cloud

Fully managed Cosine for teams whose requirements fit our standard cloud controls.

The fastest way to adopt Cosine with a fully managed product experience and no infrastructure to maintain.

Instant access to the latest Cosine models, product updates, collaboration features, and cloud execution.

Ideal for rapid evaluation, team rollout, and customers whose requirements fit our standard cloud controls.

Get Started Request a demo

Dedicated tenant

Managed single-tenant cloud

A private Cosine environment operated for your organisation with enterprise controls.

Dedicated Cosine environment for your organisation, designed for enterprise isolation and predictable controls.

Connect to your network, identity, repositories, and policy requirements while Cosine manages the platform.

Best for teams that need private data boundaries without operating every part of the stack themselves.

Learn more

Maximum control

Fully air-gapped

For organisations that need Cosine to run entirely inside their own security perimeter.

Run Cosine entirely inside your own infrastructure with no external dependencies and no data egress.

Deploy against strict isolation, regulatory, and classified-network requirements without compromising workflow quality.

Option to post-train or fine-tune models for internal codebases, frameworks, and legacy languages.

Recent highlights

View all blog posts →

Apr 22, 2026 · Engineering

Cosine Swarm: Long-Horizon Agents Working in Parallel

Robert Gibson

Apr 16, 2026 · Insights

The Hidden Cost of AI Velocity: Navigating Slop

Robert Gibson

Apr 16, 2026 · Insights

Building an Agent for Engineers Who Use Them Every Day

Robert Gibson

Apr 16, 2026 · Engineering

Cosine CLI: The Runtime Behind Terminal-Native Engineering

Rachel Black

View all blog posts →

Start building

Ready to build? Get started with Cosine.

On your Desktop, in your CLI, with seamless handoff to the Cloud.

Download for Mac

macOS Windows

Linux