Backendless is described as 'complete visual app development platform that offers a fully integration UI Builder, real-time database, robust backend with Codeless logic, team-driven development, and bulletproof security' and is an app in the Development category. There are more than 50 alternatives to Backendless for a variety of platforms, including Online / Web-based, Windows, Android, iPhone and Linux. The best alternative is Airtable, which is free. Other great apps like Backendless are Firebase (Freemium), Strapi (Freemium, Open Source), Bubble (Freemium) and Thunkable (Freemium).
Airtable is the easy but powerful organizational tool that works exactly the way you want. It's as fast and flexible as a spreadsheet, but offers a refreshingly clean, modern way to organize and collaborate on everything.
Strapi is the most popular open-source Headless CMS. Strapi gives developers the freedom to use their favorite tools and frameworks while allowing editors to easily manage their content and distribute it anywhere.
Design beautiful web and mobile web applications without writing any code. Bubble's drag and drop builder gives you total freedom, letting you build pixel-perfect designs. Bring your site to life with responsive layouts and animations.
Nakama is an open-source distributed social and realtime server for games and apps. It has a large set of services for users, storage, and realtime communication; as well as specialized APIs like realtime multiplayer, groups/guilds, and chat.
Etebase makes it easy to build end-to-end encrypted applications by taking care of the encryption and its related challenges. Think Firebase but encrypted in a way that only your users can access their data.