OneSignal is a free and multi-platform mobile push notification service designed for Websites and mobile applications.
Cost / License
- Freemium
- Proprietary
Platforms
- Android
- iPhone
- Android Tablet
- iPad




RapidAPI is described as 'Lets you easily find and connect to practically any API in the world while also providing the easiest way to track and manage the ones you use, in just one place. No need to search through massive API docs either, RapidAPI's intuitive interface gives developers a' and is a backend as a service in the development category. There are more than 50 alternatives to RapidAPI, not only websites but also apps for a variety of platforms, including Self-Hosted, Android, iPhone and Windows apps. The best RapidAPI alternative is Supabase, which is both free and Open Source. Other great sites and apps similar to RapidAPI are PocketBase, Firebase, Strapi and GUN.
OneSignal is a free and multi-platform mobile push notification service designed for Websites and mobile applications.




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Prompt API is a curated API marketplace with high scalability and security for developers. It differentiates from large and uncurated API marketplaces like rapid API by its selection process and hosting options.




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Para is a flexible and cost-effective back-end service based on open source software. It helps developers build their products faster by focusing on the front-end. Free plans available.

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