Webiny is an open-source framework for building serverless applications. It provides you with developer tools, libraries, ready-made apps and processes. It's built on top of AWS cloud and uses the latest technologies such as NodeJs, React and GraphQL.
Build Full-Stack Serverless Web Applications with Webiny

It's designed for building websites, apps and APIs that scale to millions of users and run on top of serverless infrastructure like AWS Lambda.

Serverless makes infrastructure easy, Webiny makes serverless easy

BENEFITS :

1.Developer-friendly
Webiny has been made with the developer in mind. It helps them develop serverless applications with ease.

2.Open source
Webiny is created and maintained by an amazing group of people. Being open source means Webiny grows and evolves much faster. Contributors are welcome.

3.It's a community
We have an active community on slack. Talk to the core-team, and get help. Webiny team is always there for any questions.

Check their github : https://github.com/webiny/webiny-js