Postman

Hasura is an engine that auto-generates real-time GraphQL and REST APIs on top of existing databases like Postgres. It handles authorization and event triggers without backend boilerplate. Founded in 2017, it is widely used to speed up API development.

Novu is an open-source, API-first notification infrastructure that orchestrates multi-channel messaging across email, SMS, push, in-app inbox, and chat from a single workflow. It ships an embeddable notification inbox component plus digest, preferences, and...

Knock is a notification infrastructure platform that provides APIs to power multi-channel messaging across email, SMS, push, in-app, and chat without building a system in-house. It includes visual workflow tooling so product and marketing teams can...