You do not have to use their software.<p>You can use one of the alternate clients people have written, or write your own:<p><a href="https:&#x2F;&#x2F;github.com&#x2F;xenolf&#x2F;lego" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;xenolf&#x2F;lego</a><p><a href="https:&#x2F;&#x2F;github.com&#x2F;ericchiang&#x2F;letsencrypt" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;ericchiang&#x2F;letsencrypt</a><p>Or use this web interface:<p><a href="https:&#x2F;&#x2F;gethttpsforfree.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;gethttpsforfree.com&#x2F;</a><p>Also you can configure it to give you longer lasting certs.