What is the difference between Chatter API and Connect API in Salesforce?

Hello Madhulika,

Chatter API is REST API for Chatter to display Salesforce data, especially in mobile applications. Responses are localized, structured for presentation, and can be filtered to contain only what the app needs.

Connect API provides apex classes for accessing the same data available in Chatter REST API. Use Chatter in Apex to create custom Chatter experiences in Salesforce

Thanks.

Use Chatter REST API to:

Build a mobile app.
Integrate a third-party web application with Salesforce so it can notify groups of users about events.
Display a feed on an external system, such as an intranet site, after users are authenticated.
Make feeds actionable and integrated with third-party sites. For example, an app that posts a Chatter item to Twitter whenever the post includes #tweet hashtag.
Create simple games that interact with the feed for notifications.
Creating a custom, branded skin for Chatter for your organization.

The ConnectApi namespace (also called Chatter in Apex) provides classes for accessing the same data available in Chatter REST API. Use Chatter in Apex to create custom Chatter experiences in Salesforce.

Thanks