Heroku, Zapier, Prisma, Strapi, Supabase, Apigee, Kong, Hoppscotch, deployd, Stoplight, Hasura, RapidAPI, Botman.one, NoCodeAPI, Gravitee.io, KrakenD, ApyHub, WSO2 API Manager, REST Client for Android, Apiman, Backendless, Apidog, 3Scale, RestDB.io, RestCase, Postkit, API Platform, DreamFactory, Tyk Cloud, CloudRail, API Plug, PostGraphile, Mashery, Restlet, subZero, Stackprint, Halosys, JustAPIs, BinaryOps.io are some alternatives to ApiOpenStudio.