billing-infrastructure
(3)
Lago
Lago is an open-source billing and metering platform that lets companies build usage-based, subscription, and hybrid pricing models without building a homegrown billing stack from scratch. Founded in 2021 by two early Qonto employees, it offers a free, self-hostable core plus managed cloud tiers, and is used by companies such as Mistral AI, PayPal, Groq and Synthesia to meter events and issue invoices at scale.
Paid
Paid is a monetization platform for AI agents. Instead of charging by the seat or the API call, it lets agent builders price by the outcome an agent delivers - points of margin saved, tasks completed, revenue generated - then tracks the underlying costs and margins in real time and hands the customer a receipt proving the value. Founded by Outreach creator Manny Medina and a team that previously built billing at Salesforce, Palantir and Pleo, Paid raised $33.3M across a 2025 pre-seed and seed and is building the plumbing for how software gets paid when the software is an autonomous worker.
Orb
Orb is a modern billing platform that helps software and AI companies turn raw product usage into revenue. Instead of being built around rigid subscriptions and contracts, Orb starts by ingesting real usage events and lets teams define any pricing logic on top - usage-based, seat-based, token-based, or hybrid. Founded by former Asana engineers who were tired of pricing changes taking months, Orb powers billing for companies like Vercel, Replit, Pinecone, and Perplexity.