Signal is based in San Francisco and, last I checked, runs on AWS/Azure. Bsky is similar, US based and operated. Google/Apple could be ordered to delist anything from their stores preventing wide adoption of other apps.
Best I can think of is something very decentralized like Briar or Matrix/fediverse/i2p alternatives. As of right now, adoption of those is limited. If you pulled the lever tomorrow and cut the major platforms, most people wouldn’t even know where to go as a fallback.
Any that are widely in use or accessible?
Signal is based in San Francisco and, last I checked, runs on AWS/Azure. Bsky is similar, US based and operated. Google/Apple could be ordered to delist anything from their stores preventing wide adoption of other apps.
Best I can think of is something very decentralized like Briar or Matrix/fediverse/i2p alternatives. As of right now, adoption of those is limited. If you pulled the lever tomorrow and cut the major platforms, most people wouldn’t even know where to go as a fallback.