heal.dev
Claim this toolUncover runtime bugs, vulnerabilities, and regressions with reproducible failing tests
Paid plans only Visit Website Paid Visit Website
Tracked since 2026
The Bottom Line
- Price
- Paid plans only. Compare plans
Key facts
- Heal runs your product in a sandbox to find runtime bugs and vulnerabilities that code review misses
- Each defect is proven with a failing test that becomes green after the fix is applied
- Supports security exploits, performance issues, and third-party API interactions
Pros
- Catches bugs that exist between untouched code, config, data, and services
- Provides reproducible proof with failing tests, eliminating false positives
- Can automatically fix defects using AI agents after detection
Cons
- Requires setting up a production-like sandbox which may be complex for large applications
- Likely more expensive than simple static analysis tools
What is heal.dev?
Heal is a runtime testing tool that runs your entire product in a production-like sandbox to find bugs, runtime vulnerabilities, and performance issues that traditional code review overlooks. Unlike static analysis tools that only examine code diffs, Heal actually executes the application, interacts with its features, and validates behavior against real or emulated dependencies such as Postgres, Stripe, Slack, and other services. Each discovered defect comes with a failing test that proves it, ensuring the issue is reproducible and clearly understood.
The tool is designed for development teams that want to catch subtle integration bugs, security exploits, and performance regressions before they reach production. Heal can be run weekly or before a release, and it integrates with AI agents (like Claude Code) to automatically fix defects. The sandbox environment replicates production with mocks, local emulators, and live API connections as needed, and it supports web apps, APIs, and real databases.
Key Features
- Sandbox that replicates production with real or emulated dependencies (databases, third-party APIs, etc.)
- Runtime bug detection for behavior, security, and performance
- Each defect includes a failing test that reproduces the issue
- Integration with AI agents to auto-fix defects (e.g., Claude Code)
- Supports web apps, APIs, and real databases like Postgres
- Ability to mock or emulate third-party services including Stripe, Slack, and live APIs
- Runs on the entire product, not just a single pull request diff
Pricing
Paid
heal.dev offers paid plans. Visit their website for current pricing details.
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heal.dev FAQ
How does Heal differ from traditional static analysis or AI code review tools?
Heal runs your actual product, not just the diff of a pull request. It executes the application, interacts with features, and validates behavior against real or emulated dependencies. Static analysis flags patterns that look wrong, but Heal proves defects by reproducing them end-to-end with a failing test.
Can Heal interact with third-party services like Stripe and Slack during testing?
Yes. Heal can either mock, emulate, or connect to live APIs for services like Stripe and Slack. For example, it can use a Stripe local emulator or call a live Slack API. The sandbox supports a mix of real dependencies and mocks to match production as closely as possible.
What types of defects does Heal detect beyond standard bugs?
Heal detects runtime vulnerabilities (e.g., security exploits fired at the sandbox as two different users), performance issues (slow endpoints, excessive database calls), and behavioral bugs such as expired discount codes that incorrectly appear applied.
Does Heal integrate with CI/CD pipelines or can it be run on a schedule?
Heal is designed to be run weekly or before a release, not necessarily on every pull request. The site suggests running it on the whole product periodically. It outputs defects with tests that can be integrated into CI workflows, and it supports automation via terminal commands (e.g., fixing defects with Claude Code).
How does Heal ensure the defects it files are reproducible and not false positives?
Heal only files defects it can reproduce itself. For each defect, it generates a failing test that fails twice (once on the broken code, once after re-running) and then passes once the fix is applied. If Heal cannot reproduce the issue, it does not report it.
Can Heal automatically fix the defects it finds?
Yes. Heal supports fixing defects with AI agents. For example, after a defect is found, you can use a command like 'claude "Fix the Heal defect #41, then mark it fixed"' to automatically apply a code change and verify the test passes.
What types of applications does Heal support?
Heal supports web apps, APIs, and applications using real databases like Postgres. The sandbox can also include test data and emulators for services like Stripe and Slack. Open-source repos such as TwentyCRM, Formance, NVIDIA NeMo, and Windmill have been tested with Heal.
Source: heal.dev