I just checked and you&#x27;re right. Their website is very misleading on the subject: &quot;The StartCom Certification Authority, provides the StartSSL™ Free certificates instantly, without limitations&quot;. Correct me if I&#x27;m wrong, but &quot;Class 1 certificates are limited to client and server certificates, whereas the later is restricted in its usage for non-commercial purpose only.&quot; is the very definition of a limitation.<p>Thankfully it doesn&#x27;t affect me currently -- I&#x27;m using class 2 certificates -- but I&#x27;ll be doing more research come renewal time.