DC Universe (now defunct)
(launched in 2018)
DC Database; IMDb; official website; TV Tropes; Wikipedia

This service provided access to both live-action and animated DC Comics movies and TV series, as well as digital comic books. It also included original online content. In 2020, the site was changed to "DC Universe Infinite", solely for digital comics. Future seasons of some of DCU's original shows moved to HBO Max.

stuff I've seen:

Harley Quinn (s1-2; watched on Max/HBO Max; Break Room of Geeks s1, s2)

stuff I want to see:

Doom Patrol (s1-2; moved to HBO Max)
Stargirl (s1; moved to The CW) (Max)
Swamp Thing (s1)
Titans (s1-2; moved to HBO Max)
Young Justice: Outsiders (s3 of Young Justice, the first two season of which aired on Cartoon Network; moved to HBO Max)