Add Stytch to sponsors.

sponsors/index.html

@@ -103,6 +103,8 @@ <h1>Sponsors</h1><p>Passport is an open source project.  Ongoing development is
                 <p><b>Drag and drop your auth</b><br>Add authentication and user management to your consumer and business apps with a few lines of code.</p></a></div>
             <div class="item"><a rel="sponsored" href="https://fusionauth.io/?utm_source=passportjs&amp;utm_medium=referral&amp;utm_campaign=sponsorship"><img id="fusionauth" src="fusionauth.png">
                 <p><b>Auth. Built for Devs, by Devs</b><br>Add login, registration, SSO, MFA, and a bazillion other features to your app in minutes. Integrates with any codebase and installs on any server, anywhere in the world.</p></a></div>
+            <div class="item"><a rel="sponsored" href="https://stytch.com?utm_source=oss-sponsorship&amp;utm_medium=paid_sponsorship&amp;utm_campaign=passportjs"><img src="stytch.png">
+                <p><b>API-first AuthN, AuthZ, and Fraud Prevention</b><br>The most powerful identity platform built for developers. Easily build and secure a modern auth flow with user & org management, multi-tenant SSO, MFA, RBAC, device fingerprinting, and more.</p></a></div>
           </div>
           <div class="bronze">
             <div class="item"><a rel="sponsored" href="https://altruistiq.com/"><img src="altruistiq.svg"></a></div>