Best API Monetization Software in 2026
Updated
In short: Gravitee API Gateway is ranked #1 of 37 as of 4 October 2026, ahead of Kong Gateway and Lago. The best-ranked option with a free plan is Kong Gateway. The lowest first paid tier on this page is DigitalAPI at $2.50/mo.
If you sell access to an API, monetization software can help define plans, measure usage, and handle billing. Compared on API plan builder, developer portal, usage metering, overage billing, and subscription billing, these entries show capabilities relevant to packaging and charging for access. Supported billing models and payment gateway support add further points to compare. Review free-plan availability and paid-from pricing for cost context. Gravitee API Gateway, Kong Gateway, and Lago are among the named options. Consider how you intend to charge customers and whether the listed billing and portal features align with that approach.
37 API monetization software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
9 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | Gravitee API GatewayWeb · Windows · Linux · Self-hosted · API | Three bars | — | 3 of 6 | $2,500/mo | 6.6 | |
| 2 | Kong GatewayWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | Free | 6.5 | |
| 3 | LagoWeb · Self-hosted · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 4 | MoesifWeb · Self-hosted · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 5 | ReveniumWeb · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 6 | StiggWeb · Self-hosted · API | Two bars | — | 1 of 6 | $399/mo | 6.4 | |
| 7 | ZuploWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | $25/mo | 6.4 | |
| 8 | Apigee API hubWeb · API | Two bars | — | 1 of 6 | Free | 6.3 | |
| 9 | FlexpriceWeb | Two bars | — | 1 of 6 | $500/mo | 6.3 | |
| 10 | Sentinel EMSWeb · Windows · Mac · Linux · Self-hosted · API | Two bars | — | — | 4 of 6 | — | 5.7 |
| 11 | Layer7 API ManagementWeb · Android · iPhone · Self-hosted · API | Two bars | — | — | 3 of 6 | — | 5.5 |
| 12 | Tyk API ManagementWeb · Linux · Self-hosted · API | One bar | — | — | 2 of 6 | — | 5.5 |
| 13 | Zuora CPQWeb · API | One bar | — | — | 1 of 6 | — | 5.5 |
| 14 | DigitalAPIWeb · Self-hosted · API | One bar | — | — | 1 of 6 | $2.50/mo | 5.4 |
| 15 | GotransverseWeb · API | One bar | — | — | 1 of 6 | $37,500/mo | 5.3 |
| 16 | WSO2 API DesignerWeb · Windows · Mac · Linux · Extension | Two bars | — | — | 4 of 6 | $119/mo | 5.2 |
| 17 | YouniumWeb · API | No signal | — | — | 1 of 6 | — | 5.1 |
| 18 | Zuora BillingNo platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 19 | API7 EnterpriseWeb · Linux · Self-hosted · API | One bar | — | — | 2 of 6 | — | 5.0 |
| 20 | APIwizNo platforms listed | No signal | — | — | 0 of 6 | — | 5.0 |
| 21 | Aria BillingWeb | No signal | — | — | 1 of 6 | — | 5.0 |
| 22 | BoomiWeb · Self-hosted · API | One bar | — | — | 1 of 6 | $99/mo | 5.0 |
| 23 | m3terWeb | No signal | — | — | 1 of 6 | — | 5.0 |
| 24 | SAP API ManagementWeb · Self-hosted · API | One bar | — | — | 1 of 6 | $5,339/mo | 5.0 |
| 25 | Zenskar Revenue RecognitionWeb · API | One bar | — | — | 1 of 6 | — | 5.0 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which API monetization software is ranked first on Freedom251?
Gravitee API Gateway is ranked #1 of 37 with a score of 6.6. Kong Gateway is second and Lago third.
How many of these have a free plan?
9 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, DigitalAPI has the lowest first paid tier we found: $2.50/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.