GoToSocial is described as 'ActivityPub social network server, written in Golang' and is a Social Network in the social & communications category. There are more than 25 alternatives to GoToSocial for a variety of platforms, including Web-based, Self-Hosted, Android, iPhone and iPad apps. The best GoToSocial alternative is Mastodon, which is both free and Open Source. Other great apps like GoToSocial are Pixelfed, Bluesky, X and diaspora*.
Decentralized and federated social platform with no ads, focusing on personal interaction, and offering 500 character posts, custom emojis, content warnings, and robust moderation tools.
Federated image-sharing platform with privacy, safety, no tracking or ads, algorithm-free chronological timelines, open-source code, comprehensive moderation, supports self-hosting, ActivityPub protocol, hashtag discovery, responsive mobile access, and ethical data control.
Focused on photos. I've never tried running my own instance, but I get the impression it's more complex than GTS, but not as complicated as Mastodon.
An open social network that gives creators independence from platforms, developers the freedom to build, and users a choice in their experience.
Experience global interaction with public conversations, real-time news updates, live audio Spaces, streaming video, exclusive content monetization, and niche Communities.
Diaspora is a federated social networking service, designed to be a more privacy-aware alternative to Facebook . Share what you want, with whom you want.
Pleroma is a free, federated social networking server built on open protocols. It is compatible with GNU Social, Mastodon, and many other ActivityPub and OStatus implementations.
Friendica is a distributed social network application. Which allow users to connect with others via their own Friendica server, but may also fully integrate contacts from other platforms including Twitter, diaspora*, Pump.io and StatusNet into their 'newsfeed'.
GNU social is a continuation of the StatusNet project. It is social communication software for both public and private communications. It is widely supported and has a large userbase.
The simplest open protocol that is able to create a censorship-resistant global "social" network once and for all.
Solcial is a decentralised social network built for privacy and freedom of speech. It give users the ability to interact with each other without fear of censorship and to allow content creators to monetize their work fairly at market value.
Sharkey is a Misskey fork following upstream changes when possible, with added features. Like any other ActivityPub software Sharkey can interface with the thousands of servers that form the fediverse, an interconnected social network, working in tandem with software such as...
Germany
EU
Canada
United States
Australia
Japan
More features overall, but lacks some of the safety features being built into GoToSocial. And if you want to host your own site, Mastodon takes a lot more server resources and time to maintain it.