The best alternatives to GatewayD are Mindware, Connect Earth API, and Sandbox. If these 3 options don't work for you, we've listed a few more alternatives below.
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Notion— Get over $6,000 worth of Notion + unlimited AI, for free
Connect Earth is the gateway to environmental data. Our API tracks carbon footprint of each financial transaction. Banks and FinTechs integrate our product to show their customers the environmental impact of every purchase. Get 1000 free API calls per month!
Tyk is Tyk is an open source API Gateway that is fast, scalable and modern. Out of the box, Tyk offers an API Management Platform with an API Gateway, API Analytics, Developer Portal and API Management Dashboard.