Commet

Problem : Stripe is for payments, but billing is a logic nightmare. Most of us start with Stripe and realize we just inherited a second job: building a complex state machine for credits, usage, and subscriptions. If you're building in 2026, you shouldn't be debugging webhook race conditions or worrying about EU-VAT compliance. The Solution : Commet, we built Commet to be the "Source of Truth" for your SaaS. It’s a Merchant of Record (MoR) with a built-in deterministic billing engine. Why devs love it : No Webhook Hell: Our engine handles the state. Your app just asks our API: "Can this user do X?" and gets a real-time boolean. Tax Compliance on Autopilot: We are the legal seller. We handle global taxes, invoices, and compliance so you don't have to hire an accountant in 20 countries. Built for AI & Usage: Perfect for credit-based models. Stop losing margins to "heavy" users. LLM-Friendly: Our logic is so clean that Cursor or Claude won't hallucinate your billing implementation. The Story : I got tired of building the same billing glue-code for every project. I wanted something where I could just define my pricing and start charging. That’s Commet. Try the logic (no account needed) : sandbox.commet.co