Final End of Life Date Announcement for Twilio Voice JS SDK 1.x

For years, Twilio Voice JS SDK 1.x has helped customers power countless voice calling experiences. But as with any long-standing tool, there comes a time to pass the torch.

Twilio will officially sunset Voice JavaScript SDK version 1.x on September 10, 2025. To continue building [and delivering] seamless voice experiences, customers should migrate to version 2.x before this date. 

Why upgrade?

Voice JS SDK 2.x was built based on customer feedback and real-world cases in mind. Since its release it’s brought meaningful improvements, such as:

• Support for modern JavaScript Frameworks

• Ability to send messages to and receive messages from your backend (User Defined Messages)

• Improved connection handling with automatic recovery without dropping the call

As SDK 1.x begins to wind down, customers may start to experience service degradation or intermittent disruptions. After September 10, 2025, version 1.x will no longer be maintained or supported. 

Migrating early is the best way to ensure uninterrupted service. The Voice JS SDK migration guide makes it easy to get started, and SDK 2.x is the best way to ensure your voice experience stays reliable and up to date.

We’re grateful to the customers who have relied on SDK 1.x and we’re excited for what’s possible with version 2.x and beyond.