Meteroid is an open-source, flexible billing & monetization platform in 2026 for SaaS and modern software companies. It handles subscriptions, usage-based metering, hybrid pricing, quotes/CPQ, invoicing, and real-time data ingestion without vendor lock-in. Self-host or cloud, supports complex models (seats, tiers, one-time, grandfathering), integrations (Stripe/Paddle payments, analytics), and revenue insights. Ideal for startups testing models, growing SaaS scaling usage billing, or enterprises needing custom logic—free OSS core, affordable cloud plans up to high revenue thresholds.