Best API Marketplace Software in 2026
Updated
In short: Postman is ranked #1 of 29 as of 4 October 2026, ahead of Kong Gateway and API.market. 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.
An API marketplace can provide a way to publish and offer API products to subscribers. Compare API publishing and product limits with deployment options and marketplace type to understand the models available. Marketplace analytics, monetization models and subscriber billing add detail about operating and charging through a marketplace. Postman, API.market and Zuplo are among the options to consider. Check free-plan availability and paid-from pricing alongside those capabilities when assessing cost. The right comparison depends on how you plan to distribute APIs, manage subscribers and structure paid access, as well as the deployment approach that fits your needs.
29 API marketplace software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Is your tool 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 marketplace software is ranked first on Specifiction?
Postman is ranked #1 of 29 with a score of 7.8. Kong Gateway is second and API.market third.
How many of these have a free plan?
12 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 on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing. Paid placements never change a rank.














