Canary

What it does

Canary is an independent code tester for changes produced by coding agents. It reads a code diff and repository to map affected flows, boots the application in a clean sandbox, and tests those flows through browsers and APIs. It returns reproduced failures with a replay and root-cause explanation, and can re-test fixes and retain passing checks as regressions.

Developers can run Canary from a coding agent before a task is finished, or have it run when a GitHub pull request opens. The CLI flow starts by installing `@runcanary/cli` and running `canary skills`; the product page says to follow the resulting onboarding instructions. Reports can appear in chat, in the repository, and on Canary. The page names Claude Code, Cursor, Codex, and other agents as supported coding-agent contexts, and lists GitHub, Linear, Sentry, Datadog, Notion, and Slack among integrations.

Canary is aimed at software teams reviewing agent-written code and pull requests. The stated workflow requires a repository and an application that Canary can boot and exercise; the page does not document language or framework coverage, supported operating systems, or sandbox location. Pricing and any usage limits are not stated on the available official page.

What it can do

• Reads diffs and codebases to map affected flows
• Boots applications in a clean sandbox
• Tests flows using browsers and APIs
• Reproduces failures with replay and root-cause information
• Re-tests fixes and retains checks as regressions
• Posts pull-request findings and supports reruns

Works with

• Claude Code
• Cursor
• Codex
• GitHub
• Linear
• Sentry
• Datadog
• Notion
• Slack

Before you choose

• Canary must be able to boot the application and exercise its affected flows; the official page does not state supported languages, frameworks, or operating systems.
• The page does not clarify whether execution uses local or remote compute, or describe sandbox isolation and data handling.
• No public price, trial, free tier, or usage limits are documented in published product information.

Listed under

• Coding
• AI testing
• Bug detection
• Code verification
• Coding agents
• Developer tools
• Pull requests

Get started

1. Install the CLI with `npm i -g @runcanary/cli`.
2. Run `canary skills` and follow its onboarding instructions for the repository.
3. Use `canary verify` from a coding agent, or connect a GitHub pull-request workflow.

Commercial rates and usage limits require confirmation.

We couldn’t find published prices for Canary. See their pricing page ↗

Sources for this overview

Product pages, documentation, and pricing checked 2 Nov 2026. Each source supports part of the overview; availability and prices can change.

• Canary · AI writes your code. Canary tests it. ↗www.runcanary.ai

Company website

runcanary.ai: product, pricing and policy pages

Hacker News

Launch posts and discussion

YC directory mirror

Batch and company name

Web search

Confirms the official site

Social accounts

Accounts the company links, and its posts on X

Human review

Checked by a person

manual_review

Last checked 2 Nov 2026. Every field keeps its source and date; unknown means we couldn’t confirm it.