@fabeltjeskrant

Another option is Friendica, where there's effectively no character limit on posts. It is also part of the Fediverse, and Friendica servers federate with Mastodon servers:

https://fedi.tips/friendica-a-flexible-fediverse-server-type-with-long-posts/

Or Write Freely, a Medium-style platform:

https://fedi.tips/writefreely-long-form-writing-platform-for-the-fediverse/