Curtail

ReGrade replays real traffic against agent-written code and reports behavior changes so agents can fix regressions before review.

ReGrade replays recorded production traffic against every merge request, automatically surfacing behavioral and performance differences before code reaches production.

Curtail's ReCover applies ReGrade's NCAST technology to live production traffic to monitor activity, detect anomalies, and divert attacker sessions to honeypots. It is in development.

ReGrade uses field-level comparison to verify that code transformed between languages, such as C and Python, behaves identically.

Latest news and insights from the Curtail team.

The page says Anthropic's Claude Mythos found a 16-year-old memory-corruption bug in FFmpeg that automated tests missed, and discusses migrating C/C++ to memory-safe languages and verifying equivalent behavior.

The page says AI-generated code can pass tests while changing behavior the tests do not check, and describes detecting runtime regressions missed by CI.

The page cites estimates that technical debt uses 42% of developer time and costs the US $1.52 trillion, and that memory safety bugs account for 70% of CVEs at Microsoft and Google. It describes ReGrade 3's code-behavior verification.

ReGrade pricing: start free on one service, $20 per user per month for an engineer running it on every merge request, and custom terms for an engineering organization.

Curtail keeps businesses running by using live traffic analysis to identify defects before software goes live, and detect and isolate security threats before they impact systems.

Curtail offers ReGrade and ReCover.

Curtail ReGrade uses comparison-based live traffic analysis to find bugs in AI-generated code before they reach production.

Curtail's page explains how it collects, uses, and protects personal information.

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