Activepieces - Build automation flows to connect several apps together in your app's backend. For example, send a Slack message or add a Google Sheet row when an event fires in your app. Free up to 5,000 tasks per month.
back4app.com - Back4App is an easy-to-use, flexible and scalable backend based on Parse Platform.
backendless.com — Mobile and Web Baas, with 1 GB file storage free, push notifications of 50,000/month, and 1000 data objects in the table.
bismuth.cloud — Our AI will boostrap your Python API on our function runtime and hosted storage, build and host for free in our online editor or locally with your favorite tools.
BMC Developer Program — The BMC Developer Program provides documentation and resources to build and deploy digital innovations for your enterprise. Access to a comprehensive, personal sandbox that includes the platform, SDK, and a library of components that can be used to build and tailor apps.
connectycube.com - Unlimited chat messages, p2p voice & video calls, files attachments and push notifications. Free for apps up to 1000 users.
convex.dev - Reactive backend as a service, hosting your data (documents with relationships & serializable ACID transactions), serverless functions, and WebSockets to stream updates to various clients. Free for small projects - up to 1M records, 5M monthly function calls.
darklang.com - Hosted language combined with editor and infrastructure. Accessible during the beta, a generous free tier is planned after beta.
Firebase — Firebase helps you build and run successful apps. Free Spark Plan offers Authentication, Hosting, Firebase ML, Realtime Database, Cloud Storage, Testlab. A/B Testing, Analytics, App Distribution, App Indexing, Cloud Messaging (FCM), Crashlytics, Dynamic Links, In-App Messaging, Performance Monitoring, Predictions, and Remote Config are always free.
Flutter Flow — Build your Flutter App UI without writing a single line of code. Also has a Firebase integration. The free plan includes full access to UI Builder and Free templates.
getstream.io — Build scalable In-App Chat, Messaging, Video and audio, and Feeds in a few hours instead of weeks
hasura.io — Hasura extends your existing databases wherever it is hosted and provides an instant GraphQL API that can be securely accessed for web, mobile, and data integration workloads. Free for 1GB/month of data pass-through.
nhost.io - Serverless backend for web and mobile apps. The free plan includes PostgreSQL, GraphQL (Hasura), Authentication, Storage, and Serverless Functions.
onesignal.com — Unlimited free push notifications. 10,000 email sends per month, with unlimited contacts and access to Auto Warm Up.
paraio.com — Backend service API with flexible authentication, full-text search and caching. Free for one app, 1GB of app data.
pubnub.com — Free push notifications for up to 1 million messages/month and 100 active daily devices
pushbots.com — Push notification service. Free for up to 1.5 million pushes/month
pushcrew.com — Push notification service. Unlimited notifications for up to 2,000 Subscribers
pusher.com — Free, unlimited push notifications for 2000 monthly active users. A single API for iOS and Android devices.
quickblox.com — A communication backend for instant messaging, video, and voice calling, and push notifications
restspace.io - Configure a server with services for auth, data, files, email API, templates, and more, then compose into pipelines and transform data.
Salesforce Developer Program — Build apps Lightning fast with drag-and-drop tools. Customize your data model with clicks. Go further with Apex code. Integrate with anything using powerful APIs. Stay protected with enterprise-grade security. Customize UI with clicks or any leading-edge web framework. Free Developer Program gives access to the full Lightning Platform.
simperium.com — Move data everywhere instantly and automatically, multi-platform, unlimited sending and storage of structured data, max. 2,500 users/month
Supabase — The Open Source Firebase Alternative to build backends. Free Plan offers Authentication, Realtime Database & Object Storage.
tyk.io — API management with authentication, quotas, monitoring and analytics. Free cloud offering
zapier.com — Connect the apps you use to automate tasks. Five zaps every 15 minutes and 100 tasks/month
IFTTT — Automate your favorite apps and devices. Free 2 Applets
Integrately — Automate tedious tasks with a single click. Free 100 Tasks, 15 Minute
Update Time, five active automations, webhooks.
LeanCloud — Mobile backend. 1GB of data storage, 256MB instance, 3K API requests/day, and 10K pushes/day are free. (API is very similar to Parse Platform)
Claw.cloud - A PaaS platform offering $5/month in free credits for users with a GitHub account older than 180 days. Perfect for hosting apps, databases, and more. (Signup Link with free credit).