webm seems to be the modern replacement for GIFs in browsers. I would suspect gifs.com supports them. Somehow their site is buggy for me atm so I could not test it.
I usually only need GIFs for GitHub readmes. GitHub doesn't support WebM autoplay videos.
In texting, Telegram has introduced WebM stickers so there's at least a choice there.
Animated GIFs remain quite useful for non-video animations where you don't want lossy compression, and want to use other GIF features like transparency. Animated PNGs are a potential replacement, and support all of the features of GIFs along with 24-bit color, but software support remains lackluster.
MP4 with H.264 is still king for compatibility, but WebM with VP9 isn’t as bespoke as it once was.