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The Misskey wordmark in black on a white background with green circles
Image from Misskey Hub, licensed under CC BY-SA 4.0.

Comparison of Misskey Forks

The Misskey family of Fediverse servers is quite large. While they all share a common origin there are some notable feature differences between them.

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This page aims to provide a rough timeline of each notable fork and a comparison of their features. The feature comparisons are for the latest stable releases of stable forks and development releases of developing/unmainted forks. If anything on this page is incorrect or out of date I’d appreciate if you could let me know: @pancakes@cats.city.

Featured Forks

Icon Name Version Account Website Repository
Misskey icon Misskey 2024.3.1 None https://misskey-hub.net/en/ https://github.com/misskey-dev/misskey
FoundKey icon FoundKey v13.0.0-preview6 None None https://akkoma.dev/FoundKeyGang/FoundKey
Firefish icon Firefish v20240206 @firefish@info.firefish.dev None https://firefish.dev/firefish/firefish
Iceshrimp icon Iceshrimp (JS) v2023.12.7 None None https://iceshrimp.dev/iceshrimp/iceshrimp
Sharkey icon Sharkey 2024.3.3 @Sharkey@shonk.social https://joinsharkey.org/ https://activitypub.software/TransFem-org/Sharkey
Catodon icon Catodon 24.01-dev @catodon@catodon.social None https://codeberg.org/catodon/catodon

Iceshrimp

In previous versions of this page I referred to Iceshrimp (JS) as just “Iceshrimp”. Iceshrimp (JS) is currently under a feature freeze as most of the development effort is going towards the rewrite, Iceshrimp.NET. However, Iceshrimp (JS) is not unmaintained and still receives security updates and is labeled as stable for this reason. Please be aware that when the timeline says “Iceshrimp” it is referring to Iceshrimp (JS), not Iceshrimp.NET. Iceshrimp.NET will not be included on this page as it is not a fork of Misskey. For more information about Iceshrimp (JS) and Iceshrimp.NET see the README in the repository linked above.

Timeline of Events

The following chart is an approximate history of ActivityPub and Misskey. As well as the forks, their versioning, and differing states of activity.

2016-01-28  ActivityPub W3C First Public Working Draft

2017-02-06  Mastodon v1.0 (included for reference)

2018-04-19  Misskey v0.0.5018
             |
             | (peace in the Misskeyverse)
             |
2022-06-13  Misskey v12.111.1 ------------| (fork)
             |                            |
2022-07-19  Misskey v12.117.1             |
             |    | (fork)                |
2022-07-20   |   Calckey v12.117.1-calc   |
             |    |                       |
2022-08-05   |    |                      FoundKey v13.0.0-preview1
             |    |                       |
2023-06-05   |    |                      FoundKey v13.0.0-preview6
             |    |                       | (unmaintained)
             |    |
2023-06-25   |   Calckey v14.0.0-rc3  ----| (rebrand)
             |                            |
2023-07-20   |                           Firefish v1.0.0, v1.0.1 -| (fork)
             | (version scheme change)    |                       |
2023-09-14   |                            |                      Iceshrimp v2023.09.13-rc1
             |                            |                       |
2023-09-21  Misskey 2023.9.0-beta.10      |                       |
             |    | (fork)                |                       |
2023-10-07   |   Sharkey 2023.9.1.beta4   |                       |
             |    |                       |                       |
2023-11-14   |    |                       |                      Iceshrimp v2023.12.1
             |    |                       |                       |   | (fork)
2023-11-28   |    |                      Firefish v1.0.5-rc       |   |
             |    |                       | (unmaintained)        |   |
2024-01-09   |    |                       |                       |  Catodon 24.01-dev
             |    |                       | (transferred/revived) |   |
2024-02-06   |    |                      Firefish v20240206       |   |
             |    |                       |                       |   |

Feature Compariosn

Comparison of features between Misskey forks
Misskey FoundKey Firefish Iceshrimp (JS) Sharkey Catodon
Status Stable Unmaintained Rolling release Stable Stable In development
General
Authorized Fetch No No Yes Yes Experimental Yes
Full Text Search Built-in or MeiliSearch ElasticSearch Sonic, MeiliSearch, or ElasticSearch Built-in Built-in or MeiliSearch Built-in
Push Notifications Yes Yes Yes Yes Yes Yes
Tutorial Yes Yes Yes Yes Yes No
Integration
Discord No No Yes Yes No Yes
GitHub No No Yes Yes No Yes
Mastodon API No No Partial Yes Yes Yes
TensorFlow Yes No Yes No No No
Webhook Yes Yes Yes Yes Yes Yes
Timelines
Antennas Yes Yes Yes Yes Yes Yes
Bubble/Recommended No No Yes Yes Yes Yes
Channels Yes Yes Yes Yes Yes Yes
Social Yes No Yes Yes Yes Merged into Home
User Lists Yes Yes Yes Yes Yes Yes
Posts
Federation Yes Yes Yes Yes Yes Yes
Editing & History Removed in 2023.10.0 View only Editing only Editing only Yes Editing only
Favorite/Like Button No No Yes Yes Yes Yes
Post Language No No Yes No No No
Module Player No Yes Yes No Yes No
Boost Visibility No No Yes Yes Yes Yes
Report Posts Yes Yes Yes Yes Yes Yes
Markdown
Misskey Flavoured Markdown (MFM) Yes Yes Yes Yes Yes
[MFM] border Yes No No No Yes
[MFM] center <center> only <center> only Yes Yes <center> only
[MFM] fade No No Yes Yes No
[MFM] x4 Yes Yes Yes Yes Yes
Per Note MFM Animation Toggle No No No Yes Yes
Markdown Lists No No No No No
Math Formulas No No Yes Yes Yes
Users
Avatar Decorations Not federated No No No Not federated No
Profile Background No No No No Yes No
Cat Mode & Speak as Cat Cat Mode only Cat Mode only Yes Yes Yes Yes
Link Verification Yes No Yes Yes Yes Yes
Roles Yes No No No Yes No
ListenBrainz Status No No No No Yes No
Feeds Yes Yes Yes Yes Yes Yes
Clips Yes Yes Yes Yes Yes Yes
Gallery Yes Yes Yes Yes Yes Yes
Pages Yes Yes Yes Yes Yes Yes
Post Backfill No No Yes Yes Yes Yes
Mute Users Yes Yes Yes Yes Yes Yes
Block Users Yes Yes Yes Yes Yes Yes
Report Users Yes Yes Yes Yes Yes Yes
Disable Post Indexing No No Yes Yes Yes Yes
Import/Export All notes, Favorite notes, Followed users, User lists, Muted users, Blocked users, and Antennas All posts, Followed users, User lists, Muted users, and Blocked users All posts, Followed users, User lists, Muted users, and Blocked users All posts, Followed users, User lists, Muted users, and Blocked users All notes, Favorite notes, Followed users, User lists, Muted users, Blocked users, and Antennas All posts, Followed users, User lists, Muted users, and Blocked users
Post Import No No Mastodon+ No Mastodon+, Pleroma, Akkoma, Misskey+, Firefish+, Twitter, Instagram, and Facebook No
GDPR Data Subject Access Requests No No No No Yes No
Migration Yes Receive only Yes Yes Yes Yes
Moderation
Approve Users No No No No Yes No
Silence Users Yes No Yes Yes Yes Yes
Mark User Media NSFW No No No Yes Yes Yes

Glossary

Brief descriptions of each feature listed above. I’m keeping them vague as they vary based on software and more broadly across the Fediverse.

Legends

General

Integration

Timelines

Posts

Markdown

Users

Moderation

Special Thanks

Corrections