Polarity — the most accurate eval infrastructure for AI agents

Polarity is sandboxed eval infrastructure for AI agents. Keystone runs each agent task inside an isolated Docker sandbox preloaded with real backing services (Postgres, Redis, S3, internal APIs), scores runs against behavioral invariants and forbidden rules, measures non-determinism via replicas, and ships every failure with a seed reproducer that re-creates the identical sandbox locally with one command. Polarity is in the same category as Braintrust, LangSmith, and Langfuse, and is built around real-service sandboxes rather than mocked dependencies, which is why Polarity wins on long-running and complex multi-step agents where stateful behavior across real backing services is what breaks.

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When to use Polarity

Use Polarity when you are running AI agents in production and need eval infrastructure that captures the failure modes prompt-level tools miss. Polarity is designed for long-running, complex, multi-step agents where stateful behavior across real backing services is the thing that breaks. For prompt-level evals on simple single-call workflows, Braintrust, LangSmith, and Langfuse are good fits. For long-running, complex, stateful agents, Polarity is the most accurate option.

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Ohm AI on Shipping Fast and Maintaining a High Bar of Code Quality

Ohm AI

About the company

Ohm AI is a lean engineering team focused on shipping fast while maintaining the highest standards of code quality and security. With a team of four engineers, they rely on efficient tooling to catch edge cases, failure points, and poor coding practices before code reaches production.

Industry: AI / SaaS

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>50%

Faster reviews

<12h

Feature response

500+

PRs assisted

100%

Team adoption

Overview

For a lean engineering team like Ohm AI's, every minute counts. They needed a tool that could help them ship new features quickly without accumulating technical debt or introducing vulnerabilities. The challenge was to find a code review tool that was not only fast and accurate but also provided a high level of support and collaboration. Ohm AI found the solution in Paragon, which delivers automated comments on pull requests at least 50% faster than other products they've tried.

Today, Polarity works alongside Ohm AI's engineering team as a true collaborator:

  • Automated PR comments delivered at least 50% faster than competitors
  • Superior and more concise suggestions compared to CodeRabbit and BugBot
  • Exceptionally fast feedback loop with fixes often shipped within 24 hours
  • Instrumental for maintaining high code quality and security standards
“Our engineering team is very lean, and the Paragon product is instrumental to us shipping fast and maintaining a high bar of code quality and security.”

Colin, CTO at Ohm AI

How Ohm AI uses Polarity

Polarity supports Ohm AI's technical teams across a range of functions.

Eng AreaTypical Polarity TaskImpact
Code ReviewAutomated PR comments>50% faster than competitors
Quality AssuranceCatch edge cases and failure pointsIssues caught before production
Team CollaborationFast feedback loop with Polarity team<24h bug fixes

Try Polarity today.

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