Kerno

Automated runtime QA tool for backend systems and AI agents

Coding & Development Testing & QAFreemium

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$19/moStarting price

6.8KMonthly visits

14Popularity

About Kerno

Kerno functions as a runtime quality and security layer for backend systems, designed to catch functional and security bugs that only emerge during execution. It verifies code changes against a live stack and dependencies before they merge, reducing regressions and manual QA overhead. The tool maps critical user flows and entry points, then writes and runs end-to-end tests to validate changes. It provides structured feedback to developers and coding agents, ensuring consistent quality across teams. Kerno supports testing for backend components such as databases, message queues, and APIs, and integrates with CI pipelines to prevent failures after deployment. The platform aims to shift verification left, catching issues at the source rather than in later stages like CI or production. It is intended for engineering teams building backend services or AI agents that require robust runtime validation.

Key features

End-to-end backend flow testing
Runtime bug detection
Security vulnerability scanning
CI integration
Critical flow mapping
Structured developer feedback
Multi-repository support
Team analytics

Use cases

Validating API changes before deployment
Testing AI agent integrations for runtime errors
Catching security flaws in backend services

Pros

Validates code changes against live stack before merge
Catches runtime and security bugs that surface only in execution
Maps critical user flows and entry points automatically
Provides structured feedback for developers and agents
Integrates with CI pipelines to prevent post-deployment failures

Cons

No free tier beyond limited Community plan
Requires installation and setup in local development environment
Pricing is per-developer, which may increase costs for large teams

Kerno videos

Frequently asked questions about Kerno

What does Kerno do?

Kerno acts as a runtime quality and security layer for backend systems, catching functional and security bugs that only emerge during execution. It verifies code changes against a live stack and dependencies before they merge, reducing regressions and manual QA overhead.

Who is Kerno designed for?

Kerno is intended for engineering teams building backend services or AI agents that require robust runtime validation. It supports developers and coding agents by providing structured feedback to ensure consistent quality across teams.

How does Kerno integrate with existing workflows?

Kerno integrates with CI pipelines to prevent failures after deployment. It maps critical user flows and entry points, then writes and runs end-to-end tests to validate changes, providing local feedback loops for faster verification.

What types of backend components does Kerno support?

Kerno supports testing for backend components such as databases, message queues, APIs, and async workers. It verifies changes against real stacks like Postgres, ClickHouse, and Kafka.

How does Kerno help reduce manual QA overhead?

Kerno automates the verification of critical flows and entry points, catching runtime and security issues before they merge. This reduces the need for manual testing and debugging, freeing up engineering time for development.

Can Kerno be used with coding agents like Cursor or Claude Code?

Yes, Kerno provides structured feedback and persistent code context to coding agents, ensuring they catch runtime issues at the source. It has been used successfully with agents like Cursor and Claude Code.