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alt=""
src="https://blog.opensips.org/wp-content/uploads/2026/02/opensips-4.0-revamp-small.jpg"
moz-do-not-send="true">
<h2 align="left"><font color="#003300"> OpenSIPS 4.0.0 </font></h2>
<h2 align="left"><font color="#003300"> goes from beta to
stable<br>
</font></h2>
<p><br>
</p>
<p><font size="+1" color="#003300"><b>It got stable!</b></font></p>
There were two full months of work, of testing, of reporting
and of fixing, but we did it! The <b>OpenSIPS 4.0</b>
release passed all the tests and exams and now it is
labelled as a stable release, the new flagship of the
OpenSIPS project. <br>
Note that 4.0 is the <u>first release in the 4.0 family</u>,
opening the path for <a moz-do-not-send="true"
href="https://blog.opensips.org/2025/07/23/opensips-4-x-the-next-evolution-step/">radical
enhancements and improvements</a>.
<p><font color="#003300"><font size="+1"><b>4.0 Philosophy</b></font></font><br>
</p>
<p>The OpenSIPS 4.0 release addresses old limitations,
deprecated designs or burning needs we accumulated across
years. Concepts we had from day 1 (in SER at that time)
were reworked or removed. Also new concepts were added, to
align OpenSIPS with the challenges of the current days.</p>
<p>So key features :<br>
</p>
<ul>
<li>TCP framework re-design</li>
<li>TLS support refreshing</li>
<li>Versatility (dynamic forking, bond interfaces)</li>
<li>Monitoring and profiling, script and code level</li>
<li>More integration (proxy protocol, IMS interop, WEB3
auth)</li>
</ul>
<div align="center"><span id="ember3975" class="ember-view"><span></span></span><a
href="https://www.opensips.org/About/Version-Overview-4-0-0"
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solid;" moz-do-not-send="true">Read more on 4.0 </a></div>
<p><br>
Any questions? do not hesitate to <a
href="mailto:team@opensips.org">contact us</a>!<br>
</p>
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<pre class="moz-signature" cols="72">--
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext"
href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a>
<a class="moz-txt-link-freetext" href="https://www.siphub.com">https://www.siphub.com</a>
</pre>
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