Title: There&#x27;s several auth-as-a-service providers on the market right now (Auth0,Firebase,etc). (By auth I mean, all the systems that facilitate password hashing and user authentication, along with SSO integrations.) Their common marketing argument, don&#x27;t reinvent the wheel, and if you try, you&#x27;ll probably get it wrong. This is pretty compelling as getting auth &quot;perfect&quot; seems to require some decent research and understanding. However, when viewing the customer pages of some of these providers, I don&#x27;t see a ton of companies that I&#x27;m familiar with. Out of all the sites and tech tools I use, are they rolling their own auth, all of them? Once a site gets big, does it just get too hard to scale or adapt to the third-party provider?
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