Guardrail

Guardrail is an onchain security company that provides real-time threat detection and automated response for blockchain protocols, stablecoins, and AI agents. Its core product concept is "Guards" — programmatic checks that evaluate each transaction's logic and state, flag risks in real time, and can trigger automated responses. Guards can be executed per block, per function, or per event, and run across testnet, app-chain, and mainnet environments, with the company describing sub-second transaction scanning live across more than 30 chains.

The platform is organized around four functions: monitoring (tracking onchain transactions, offchain inputs, and protocol-specific behaviour), alerting (context-aware notifications for threats, anomalies, or policy breaches), responding (auto-triggering protective actions such as pausing functions, flagging wallets, or escalating to a team), and prevention (simulating risky transactions or enforcing runtime checks before exploits reach production). Guardrail integrates with customers' existing CI/CD pipelines, operations stacks, and on-call systems; one customer testimonial describes integration with PagerDuty.

According to its website, Guardrail has joined Rain, and in February 2026 it announced a proactive security model for stablecoins under which Rain uses Guardrail's runtime detection and managed incident response for stablecoin payments across more than 150 countries.