List of free serverless tool/service for developer👇🏽

Azure Functions Serverless
Create event-driven, scalable serverless apps in .NET, Node.js, Python, Java, or PowerShell. Build and debug locally—deploy and operate at scale in the cloud.
Tag: serverless, azure
1 million requests / month

Deta
A Cloud for the Next Billion Ideas. Build your apps in hours, deploy them in seconds.
Tag: serverless, database, hosting
Server: Python 3.7 or Node.js 12.x Unlimited Micros (MicroServer) 128 MB of RAM for each execution An execution times out after 10s Unlimited NoSQL database

The best of AWS in seconds Up to 5 apps Shared app resources Single developer Limited throughput and database usage Basic support

Netlify
An intuitive Git-based workflow and powerful serverless platform to build, deploy, and collaborate on web apps
Tag: hosting, hosting-dynamic, hosting-static, serverless
Host static and serverless function Bandwith: 100GB /month Build Minutes: 300 Minutes /month Websites: Unlimited Serverless Functions: 125k per site /month Forms: 100 /site/month Identity: 1K /site/month
100,000 requests per day Deploy up to 30 Worker scripts Runs on all 200 data centers Free workers.dev subdomain Up to 10ms CPU time per request Lowest latency after the first request Limited Workers KV edge storage
Encore
The Encore backend framework let's you go from idea to running API in production in minutes, with no servers to manage. Get productive with Encore.
Tag: hosting, serverless, API, tracing, hosting-dynamic
Backend development platform Cloud hosting Distributed tracing Secrets management Generated API documentation

serverless
Build web, mobile and IoT applications using AWS Lambda and API Gateway, Azure Functions, Google Cloud Functions, and more.
Tag: serverless, deployment
1 User Run 1 concurrent build Up to 100K monitoring transactions/month

Vercel
Vercel combines the best developer experience with an obsessive focus on end-user performance.
Tag: hosting, hosting-dynamic, hosting-static, serverless
Host static and serverless function HTTPS-enabled Custom Domains Continuous Deployment with Git High-performance Edge Network Unlimited Websites & APIs Serverless Functions in Node.js, Go, and more
Github Action
GitHub Actions makes it easy to automate all your software workflows, now with world-class CI-CD. Build, test, and deploy your code right from GitHub
Tag: CI-CD, serverless, cron
Free 2,000 minutes per month

Appwrite
Appwrite provides web and mobile developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.
Tag: API, database, storage, authentication, serverless
Open Source

AWS Lambda
Compute service that runs your code in response to events and automatically manages the compute resources.
Tag: serverless, AWS
1,000,000 free requests per month Up to 3.2 million seconds of compute time per month