Cobalt
The cloud-first harness that gives coding agents a dedicated, isolated computer for every task
Data verified Sep 19, 2026
Score
About Cobalt
Cobalt is a cloud-first harness for running coding agents in isolated cloud environments, one dedicated computer per task, with the repository, services, branch, and state kept separate. It lets teams choose among supported agents like Codex, Gemini, and Claude Code, run multiple tasks in parallel, automate recurring work with scheduled Loops, and keep humans in the loop to watch, steer, review, and ship via pull requests. Each task keeps its prompt, runtime, live preview, diff, and delivery attached in one place.
Screenshots
Commonly Cited Strengths & Limitations
Strengths
- Each task gets an isolated cloud environment for repository, services, branch, and state
- Supports many coding agents (Codex, Gemini, Claude Code, Copilot, Cursor, Grok, OpenCode, Pi) in one workflow
- Humans stay in the loop to watch, steer, review, and take control
- Runs multiple tasks in parallel
- Automates recurring work with scheduled Loops
Common Use Cases
- Running multiple isolated coding agents in the cloud
- Automating recurring engineering work with scheduled Loops
- Running features, bug fixes, migrations, and research spikes in parallel
- Reviewing and verifying working software before shipping via Git
- Team collaboration on and oversight of agent-driven development
Details
- Pricing Model
- Unknown
- Team Size
- Software engineering teams
- Category
- Developer Tools
Who is Cobalt for?
Software Engineers
Follow and steer an agent's implementation, choose the right coding agent per task, and ship through Git.
Engineering Managers and CTOs
Inspect progress and the running application without sharing a local machine or agent credential.
Frequently Asked Questions
Does Cobalt have an API?
Yes, Cobalt provides an API for developers.
What does Cobalt integrate with?
Cobalt integrates with Codex, Cursor, Claude Code, GitHub Copilot, Gemini, Grok, Muse Code, OpenCode, and more.
Is Cobalt cloud-based or self-hosted?
Cobalt is offered as a cloud-based (SaaS) deployment.
Who is Cobalt best for?
Cobalt is best suited for Software Engineers, Engineering Managers and CTOs.
What can I use Cobalt for?
Common uses for Cobalt include running multiple isolated coding agents in the cloud, automating recurring engineering work with scheduled loops, running features, bug fixes, migrations, and research spikes in parallel, reviewing and verifying working software before shipping via git.
How does Cobalt compare to Replit?
Cobalt and Replit are both used for developer tools -- specifically coding assistants. See the full side-by-side comparison for pricing and feature differences.
Key Features
- Isolated cloud environmentsEach task runs in its own isolated cloud computer, keeping repository, services, branch, and state separate.
- Multiple coding agentsChoose Codex, Cursor, Claude Code, GitHub Copilot, Gemini, Grok, Muse Code, OpenCode, or Pi per task without changing the workflow.
- LoopsSchedule a recurring prompt against a repository and agent account, with each run starting as a traceable task.
- Compute profilesPick a computer profile from Starter to X-Large with the CPU and memory a workload needs.
- Human-in-the-loop controlWatch, steer, review, and take control of tasks from the browser.
- Shared team workspaceEngineers and technical teammates share one workspace to follow, steer, and inspect progress.
- Verify working softwareReview behaviour in the running app via Preview and let the agent test through Agent Browser with screenshots, console, and network diagnostics.
- Parallel tasksRun multiple tasks such as features, bug fixes, migrations, and research spikes side by side in separate environments.
- Attached preview, diff, and pull requestKeeps the live preview, code changes, and pull request attached to each task for review and delivery through Git.
- Developer themesChoose from 22 built-in themes or import Cobalt packs or VS Code JSON/JSONC color themes.
Integrations
Technical Details
- Deployment
- Cloud
- Target Market
- B2B
- API
- Available
Real Pricing from Verified Users
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Similar tools in Developer Tools
Other listed tools in Developer Tools, not reviewed as direct alternatives
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- Copilot cloud agent
- Sync with a repo
- Integrate with apps
- Deploy to Vercel
- Cascade agent
- Tab completions
- Multi-file editing
- Automatic model routing
- Error reduction
- Built-in context management
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