SFS3 patch v3.0.3 and client API v3.1.x now available!

This release focuses on stability, security and better diagnostics:

Security fix: reconnection handshake for encrypted sessions is now hardened: session tokens are regenerated and sent encrypted after a successful reconnect.

Better error reporting: UDP disconnections during RDP failures now return more detailed info, making it easier to debug connectivity issues.

Performance fix: resolved an issue causing extra latency with fragmented RDP packets.

Faster kick handling: kicked users are now disconnected more promptly.

Consistency fixes: cleaned up String vs ShortString usage across system requests.

⚠ Note: client API v3.1.0 is now the minimum required version, so make sure to update your clients!

Download link and full release notes: https://www.smartfoxserver.com/download/sfs3

SFS C# API v3.0.17 is live

We’ve rolled out major improvements to the Audio API and several important fixes. Here’s what’s new:

Audio Enhancements
Better audio quality with our upgraded echo cancellation, noise suppression, and automatic gain control—now powered by WebRTC’s proven audio processing. We’ve added smart audio interpolation to smooth out network hiccups and automatic resampling to handle microphone/speaker mismatches. Plus, we’ve cut garbage collection pressure for smoother performance.

New Features

  • SFSArray now supports IEnumerable
  • Custom configuration file support via ConfigData.Parse
  • Audio Echo Cancellation for Unity

Under the Hood
Fixed a few validation issues, test-only unsafe SSL configuration and debug logging noise.

Get the new API at this url:
https://www.smartfoxserver.com/download/sfs3#p=client

SmartFoxServer 3.0 is available!

Today we’re happy to announce that SmartFoxServer 3.0 beta is available!

The new major release is the next step in the evolution of SmartFoxServer, introducing a wide number of new features, improvements and support for the latest client and server technologies.

As its predecessor SmartFoxServer 3 is available for free with the Community Edition, allowing to test the full range of features and develop your own prototypes and applications. As usual you’ll find the download link in the main download section of the website.

For more details on what’s new in SmartFoxServer 3, please see our product page.

Also, for the entire duration of the beta phase you will be entitled to a 20% discount on every perpetual SmartFoxServer 3 license. Make sure to check our shop for more details.

To learn how SmartFoxServer works check our new example packs and check the new documentation website.

SFS2X price update, starting Feb 2nd, 2026

Starting February 2nd, 2026, we’ll be adjusting our prices for SmartFoxServer 2X. 
We know price increases are never fun to hear about, so we wanted to give you a heads up and some context.

Here’s the thing: we haven’t touched SmartFoxServer 2X prices since the very launch in 2011, fifteen years ago. That’s a pretty long stretch, and we’re honestly proud we’ve been able to hold the line for so long. But as you’ve probably noticed in your own life, the cost of just about everything has gone up significantly during that time and we’ve reached the point where we need to make this adjustment.

If you’ve been thinking about picking up one or more perpetual SFS2X licenses, now’s the time to lock in the current pricing. You’ve got the rest of January 2026 to purchase at our existing rates, before the price update.

We really appreciate your understanding, and even more, we appreciate your continued support over the years. If you have any questions about this change, don’t hesitate to reach out.

Continue reading →

SFS2X Patch 2.20.5 is available!

We have released SFS2X update 2.20.5 which adds the ability to extract custom http headers for websocket or BlueBox connected clients. This can be useful for gathering statistical data, identifying potential spammers or to consult custom headers when running behind a reverse proxy such as Cloudflare, CloudFront and similar.

You can find more details on the new feature in our docs website.

Also, you can find the full release notes and download the patch from our Updates download section.

SFS2X Patch 2.20.3 is available!

We have just released update 2.20.3 which brings a Tomcat security update and introduces a new feature to protect locally stored Admin passwords as hashes.

You can read the full release notes and download the patch from our Updates download section.
Also, you can read more info about the password protection feature here.

There is also a small update for the Java client API (1.8.4) introducing a TCP timeout parameter in the ConfigData object. This allows to let the BlueBox trigger earlier, where needed. You can find the details in our Client API download section.