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Rain, fresh off $250M Series C, deploys unified detection-to-response framework to further protect stablecoin payments
Guardrail, a real-time blockchain security platform backed by Coinbase Ventures and Haun Ventures, has launched an integrated security model that connects continuous runtime detection directly to managed incident response. The model addresses the attack cycle at the crucial step between vulnerability exposure and live attacks.
Rain, the global stablecoin payments platform for enterprises, neobanks, and platforms, recently deployed this unified security framework within its smart contracts and wallets used for settlement with Visa, further improving security for millions of purchases in over 150 countries.
Stablecoin transaction volumes crossed $27.6 trillion in 2024, surpassing Visa and Mastercard combined. As traditional finance accelerates its move onchain, the security challenges and unique risks it poses are widening the gap.
The blockchain industry lost over $3.4 billion to theft in 2025. More than 90% of exploits targeted code where security audits and a comprehensive review were completed. The pattern is consistent: audits examine code during development, but attacks take place in production environments through compromised keys, operational failures, and runtime exploits that static code review cannot anticipate and prevent.
Why Post-Deployment Security Matters for Stablecoins
Stablecoin infrastructure operates differently from typical DeFi protocols. When software events translate directly into payment outcomes across 150+ countries, a configuration error or a malicious transaction pattern can cause immediate user harm, with limited options for reversal.
Each application of stablecoin technology by geography, financial application, underlying assets, and wallet infrastructure brings incredible potential while simultaneously growing security risk possibility for unique attack vectors. Industry data shows that off-chain incidents compromised keys, phishing, and operational failures now represent the majority of funds lost, underscoring the need for security extending the attacking surface to: onchain activity, offchain integrations, API dependencies, and user-facing entry points.
“As Web3 matures, risk management and proactive security measures that leading institutions have built into traditional products need to be offered when transacting with stablecoins, like their fiat counterparts. Unifying risk discovery, real-time detection and managed automated response is the gold standard we’re excited to be shaping for our industry,” said Samridh Saluja, CEO of Guardrail.
How the Framework Operates
Guardrail’s platform evaluates transactions and state changes in real time using configurable detection modules. These identify conditions beyond standard vulnerability signatures, economic anomalies, permission violations, oracle deviations, and abnormal approval patterns with sub-second detection across 30+ chains.
When an incident is flagged, alerts route directly into managed response workflows developed in collaboration with Cantina, a Web3 security firm. Response operates through 24/7 triage, pre-built playbooks across technical and governance tracks, and escalation paths with defined ownership. Evidence is captured throughout proactively, resulting in an informed security posture.
Institutional-Grade Security for Onchain Finance
As stablecoins move into enterprise payments and institutional custody, security expectations shift. Partners evaluating onchain infrastructure ask direct questions: Who owns containment? How is authority structured? What evidence trail exists? How does the system perform at 3am on a Saturday?
Rain’s security model with Guardrail and Cantina answers these questions universally. Runtime signals feed governed incident workflows. Escalations route to named owners. Containment follows documented playbooks. Evidence trails support both internal review and partner diligence.
“Our enterprise partners rely on Rain to protect real-world payment flows totaling billions of dollars annually. Integrating Guardrail’s real-time monitoring and Cantina’s managed response capabilities enhances our ability to detect anomalies early and act decisively,” said Charles Yoo-Naut, CTO and Co-founder of Rain. “This is an important addition to the broader set of onchain security partners we rely on to safeguard our ecosystem.”
The integrated detection and response model is a template for protocols operating stablecoin infrastructure, custody flows, enterprise payments, and onchain financial products.
About Guardrail
Guardrail is a real-time blockchain security platform with sub-second detection across 24+ chains. Backed by Coinbase Ventures and Haun Ventures, the platform uses AI-powered anomaly detection and configurable security modules to identify exploits before funds are drained, with automated response capabilities including contract pausing and circuit breakers. Guardrail currently protects over $20+ billion in TVL across thousands of contracts for protocols including Euler, EigenLayer, BadgerDAO, and Bluefin.
