Sightengine
Check user content with moderation and media analysis APIs
Content moderation
Review and manage user-submitted material according to platform rules and community participation standards.
Substack
Publish newsletters, podcasts and video with free or paid subscriptions
Hive Moderation
Automated moderation for user-generated content
Bodyguard
Moderate online conversations and understand audiences
Flarum
Extensible open-source discussion forums
Mastodon
Join conversations across an open social network.