# Modal adds Sticky Sessions to its serverless platform

> Modal announced Sticky Sessions on Oct 20, 2026, letting each user session stay on the same container for stateful apps.

Oossa · 2026-10-20 · https://oossa.com/en/modal-adds-sticky-sessions-to-its-serverless-platform

Modal released a feature called Sticky Sessions. It routes every request of a given session to the same container, even as the platform auto‑scales. Developers enable it by adding the @modal.sessioned() decorator to a Modal Server and using the SDK or HTTP API to start sessions. The system encodes routing info in a signed session token, so multiple clients can share the same state without disabling authentication.

## The facts

- Sticky Sessions launched on 2026-10-20 ("Tue Oct 20 2026 02:00:00 GMT+0200").
- Activated via the @modal.sessioned() decorator in Modal Servers.

## Why it matters

It lets voice‑assistant, chat‑room and multiplayer‑game developers keep session state in memory without giving up serverless scaling.

## Sources & references

1. [Serverless routing made sticky](https://modal.com/blog/serverless-routing-made-sticky) – Modal, 2026-10-20

Last updated: 2026-10-20