Open Cap Stack

Cap table management built for the way startups actually work

Issue equity, model dilution, track SAFEs, and manage documents — all in one place. Free to start.

• 📊Cap table management aligned with OCTA v2.0 schema
• 📄SAFE notes, convertible notes, and equity grant tracking
• 💧Dilution modeling and waterfall analysis
• 🔢409A valuation support and vesting schedule automation
• 🤖MCP server — manage your cap table from any AI chat
• 📁Document storage with version control and audit trail

Free plan · No credit card required · Cancel anytime