head to head · open source
kong vs Flexprice
kong has 44,147 GitHub stars, 5,210 forks, 200 open issues and last shipped 11 days ago. Flexprice has 5,510 stars, 494 forks, 227 open issues and last shipped yesterday. kong leads on adoption by 701% (44,147 vs 5,510 stars). kong is written in Lua under Apache-2.0; Flexprice is written in Go under AGPL-3.0. kong has attracted 12% as many forks as stars, Flexprice 9%. Flexprice was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| kong | Flexprice | |
|---|---|---|
| GitHub stars | ★ 44K | ★ 5.5K |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Lua | Go |
| Last push | 2026-09-07 | 2026-09-17 |
| Forks | ⑂ 5.2K | ⑂ 494 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick kong if
- You weight community size — 44K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Lua
- You value the larger contributor base for long-term maintenance
pick Flexprice if
- You want the Flexprice feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Go
- You evaluated both and Flexprice fits your workflow better
About kong
Kong (also known as Kong Gateway) is an open source, cloud native, platform agnostic API, LLM, and MCP gateway, licensed under Apache 2.0, built for platform, DevOps, and AI engineering teams that need a single high performance layer to route, secure, and observe both conventional API traffic and agentic LLM traffic.
About Flexprice
Flexprice is an open source metering and billing platform that lets AI native and SaaS teams run usage based, credit based, and hybrid pricing with real time metering and reporting, and it is built for developers who would otherwise have to write billing infrastructure from scratch.
read the full Flexprice overview →
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Frequently asked questions
Is kong or Flexprice more popular?
kong has 44,147 GitHub stars and Flexprice has 5,510. kong has the larger community by that measure.
Are kong and Flexprice free?
Both are open source. kong is licensed under Apache-2.0 and Flexprice under AGPL-3.0. Neither carries a licence fee.
What is the difference between kong and Flexprice?
kong is written in Lua and Flexprice in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, kong or Flexprice?
Choose kong if you want the larger community (44,147 stars) or its Apache-2.0 licence terms. Choose Flexprice if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.