For the moment Passwordless (<a href="http:&#x2F;&#x2F;passwordless.net" rel="nofollow">http:&#x2F;&#x2F;passwordless.net</a>) seems like the next closest option in terms of not storing password systems and keep auth work minimal. It doesn&#x27;t have the &quot;single sign on&quot; benefits of cross-domain authorization that Persona could have provided and it does still require you to run your own SMTP or SMS connections (as opposed to relying on login.persona.org for that).<p>It certainly sounds like people are considering alternative providers to login.persona.org if you wanted to keep using Persona&#x2F;BrowserID, but I&#x27;m not sure how well received any of them might be without a good branding stance like Mozilla Persona mostly [1] had.<p>[1] Arguably it is a failed brand at this point with almost no consumer recognition, but still better than no brand.