PixelFed is the Fediverse's alternative to Instagram. You can follow the project at:
PixelFed accounts can be followed from Mastodon, and vice versa.
You can find instances to join at https://pixelfed.org/join
The project's website is at https://pixelfed.org
You can also self-host, or you can get managed hosting from SpaceBear at https://app.spacebear.ee
This is a brand new server run by the main developers of the project as a spin-off of mastodon.social It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!