Where “Gmail invite-only launch” started

Google, on Open web, Apr 1, 2004. It reached 2 platforms in 5.3 years.

LineageContestedKey steps, 9 of 16. Lines follow time and platform
Gmail Coming SoonGoogleFirst postAssociated PressPressKevin FoxOpen webBacklashPlatform jumpCommercialPressPeak proxyAfterlifePatient zero