CLI First
Install et, sign in with an email code, and run et round start to launch a round.
Endless Testing
Launch, monitor, and optimize A/B tests from your terminal or AI assistant. No dashboard required.
MCP for AI Assistants
Works with Claude Code, Codex, and the ChatGPT desktop app. The assistant uses the same commands as tools.
Autonomous Optimization
Thompson sampling picks winners automatically. Tests keep iterating, and the site keeps improving.
Free Tier
5 concurrent tests, 3 variants each, 10k monthly visitors. Generous enough to optimize a real site.