Cobalt

Cloud harness for running isolated coding agents with dedicated environments per task

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About Cobalt

Cobalt provides a cloud-based platform for software engineering teams to run multiple isolated coding agents simultaneously. Each task receives a dedicated cloud computer with isolated state, repositories, services, and branches, ensuring no cross-contamination between tasks. Teams can choose from supported coding agents such as Codex, Gemini, Cursor, or Claude Code without altering their workflow. The platform maintains human oversight through a browser-based control plane where engineers can watch, steer, review, and take control of tasks. Cobalt automates recurring work via scheduled Loops that run prompts against repositories and agent accounts, preserving task history for inspection. Isolated environments allow parallel execution of features, bug fixes, migrations, and research spikes, with configurable CPU and memory resources. The system supports live previews, pull requests, and verification workflows where behavior can be tested in the running application. Context, runtime state, verification, and delivery remain attached to each task for traceability.

Key features

Dedicated cloud computer per task
Isolated repositories, branches, and services
Multiple coding agent support
Live preview and pull request integration
Scheduled Loops for automation
Configurable CPU and memory resources
Browser-based control plane
Theme customization for UI

Use cases

Running parallel feature development and bug fixes in isolated environments
Automating recurring engineering tasks with scheduled Loops
Collaborative code review and verification with live previews

Pros

Isolated cloud environments per task with independent state
Supports multiple coding agents (Codex, Gemini, Cursor, Claude Code, GitHub Copilot, Grok, OpenCode, Pi)
Browser-based control plane for human oversight and collaboration
Scheduled automation via Loops for recurring engineering work
Live previews and pull request integration for verification

Cons

No mention of free tier or pricing tiers
Limited to cloud environments; no local or hybrid option described
Requires integration with specific coding agents and repositories

Frequently asked questions about Cobalt

What is Cobalt and what does it do?

Cobalt is a cloud-based platform designed for software engineering teams to run multiple isolated coding agents simultaneously. Each task receives a dedicated cloud computer with isolated state, repositories, services, and branches, ensuring no cross-contamination between tasks.

Who should use Cobalt?

Cobalt is built for software engineering teams that want to automate recurring work, run parallel tasks, and maintain human oversight through a browser-based control plane.

How does Cobalt ensure isolation between tasks?

Cobalt provisions an isolated cloud computer for each task, keeping repositories, services, branches, and runtime state separate. This ensures that tasks do not interfere with one another.

Can I use multiple coding agents with Cobalt?

Yes, Cobalt supports multiple coding agents such as Codex, Gemini, Cursor, Claude Code, GitHub Copilot, Grok, OpenCode, and Pi. Teams can choose the right agent for each task without altering their workflow.

Does Cobalt support automation for recurring tasks?

Yes, Cobalt allows teams to automate recurring work using scheduled Loops. These Loops run prompts against repositories and agent accounts, preserving task history for inspection.

How can I get started with Cobalt?

To get started, visit the Cobalt website and explore the harness. You can connect your coding agents, start a task, and manage everything from the browser-based control plane.