Lago
Open-source usage-based metering and billing engine used for AI token and credit pricing.
| Category | Cost & FinOps |
| Open source | Yes |
| Self-hostable | Yes |
| Pricing model | freemium |
| Pricing notes | Open-source core free and self-hostable; paid cloud version |
| Framework integrations | — |
| Funding / ownership | YC S21; $22M Series A (2023) |
Pricing/feature source: https://www.solvimon.com/blog/token-billing-for-ai-7-platforms-compared-2026