Engineering & Security Blog
Insights on protecting your SaaS, detecting spam, and scaling infrastructure.
Philosophy
Why We Built SignGuard: The Open-Core Alternative
Legacy APIs are expensive black boxes that break your signups when they go down. Here is how we engineered a bulletproof offline fallback.
Read manifesto →Security
How We Built an MCP Server That Prevents Claude From Burning Your Corporate Domain
AI agents hallucinate emails. If they send them, your Google Workspace gets banned. Here's the Zero-Trust firewall solution.
Read article →Lead Generation
Building an Agentic AI SDR That Actually Works (Using Claude & SignGuard)
Learn how the Autonomic Email Guesser MCP tool solves the biggest bottleneck in Agentic AI lead generation by testing 20 permutations instantly.
Read article →Engineering
How to Block Disposable Emails in Python
A comprehensive guide to building resilient, fast email validation into your Python backend using SignGuard.
Read article →