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Comparison · Collab

Flarum vs SiYuan

A side-by-side editorial comparison of Flarum and SiYuan — release velocity, themes, recent moves, and the top alternatives to consider.

Flarum vs SiYuan: at a glance

FeatureFlarumSiYuan
SectorCollabCollab
Velocity score2.56.3
Sparks · 30d00
Top themesforum-software, major-version-rc, query-performance, extension-apiknowledge-management, ai-agent, mcp, cross-platform
Last editorial update18d ago17h ago
WebsiteVisit →Visit →

What is Flarum?

Flarum's 2.0 has been in release-candidate territory for most of a year.

Flarum is an open-source forum framework whose entire recent release history is the 2.0 train — beta.8 in March, then five release candidates from April through July. The candidates ship on a three-to-six week rhythm, and most of them publish nothing beyond a pointer to the changelog file in the tag. The last releases carrying visible detail were the earlier ones, where the work was database and rendering performance plus extension-compatibility fixes.

Read the full Flarum trajectory →

What is SiYuan?

SiYuan stabilises 3.8.1 after a seven-build beta run, all of it widening the agent surface it opened in 3.8.0

SiYuan has just cut 3.8.1 stable, the endpoint of a beta chain that ran six builds in five days. The release groups into three areas: AI integration work - custom editor actions syncing across devices, an Agent panel shortcut, user-level skills read from a shared agents directory, nested rerank API formats and OpenAI Responses API support; editing and database throughput, including virtualised grouped-table rendering and faster document loading; and cross-platform reliability covering HEIF/HEIC previews, PDF export and mobile behaviour. A batch of MCP and publishing-service fixes rounds it out.

Read the full SiYuan trajectory →

Flarum vs SiYuan: editorial side-by-side

F
Flarum
COLLAB
2.5

Flarum's 2.0 has been in release-candidate territory for most of a year.

◆ Current state

Flarum is an open-source forum framework whose entire recent release history is the 2.0 train — beta.8 in March, then five release candidates from April through July. The candidates ship on a three-to-six week rhythm, and most of them publish nothing beyond a pointer to the changelog file in the tag. The last releases carrying visible detail were the earlier ones, where the work was database and rendering performance plus extension-compatibility fixes.

◆ Where it's heading

The substance that is visible points at making large forums viable: eliminating N+1 queries on the discussion list, adding a composite index to fix slow unread-notification counts, and caching scheduler timestamps. Those are the changes a forum makes when instances have outgrown the original query patterns. The steady RC cadence with no beta regression suggests a stabilisation grind rather than continued feature work — but the opaque release notes make the remaining scope hard to read from outside.

◆ Prediction

A 2.0 stable release is the obvious next step, though five candidates without a published scope makes the timing unclear. Watch whether rc.6 arrives on the same three-to-six week spacing or the gap widens.

S
SiYuan
COLLAB
6.3

SiYuan stabilises 3.8.1 after a seven-build beta run, all of it widening the agent surface it opened in 3.8.0

◆ Current state

SiYuan has just cut 3.8.1 stable, the endpoint of a beta chain that ran six builds in five days. The release groups into three areas: AI integration work - custom editor actions syncing across devices, an Agent panel shortcut, user-level skills read from a shared agents directory, nested rerank API formats and OpenAI Responses API support; editing and database throughput, including virtualised grouped-table rendering and faster document loading; and cross-platform reliability covering HEIF/HEIC previews, PDF export and mobile behaviour. A batch of MCP and publishing-service fixes rounds it out.

◆ Where it's heading

This is consolidation of the surface 3.8.0 opened, not an extension of it. The agent, semantic search and MCP endpoint arrived in the 3.8.0 line; 3.8.1 makes them portable and pluggable - skills come from a directory the user controls, editor actions follow the user between devices, and the provider layer now speaks the OpenAI Responses API rather than one bespoke shape. The high beta count against a modest final diff shows a project stabilising a young subsystem rather than building a new one.

◆ Prediction

The next line most likely pushes on the skills directory - discovery, sharing or marketplace distribution of user-level skills - since that is the piece 3.8.1 made user-editable without giving it a distribution path.

Alternatives to Flarum and SiYuan

Other Collab products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Flarum or SiYuan.

See all Flarum alternatives → · See all SiYuan alternatives →

Recent activity from Flarum and SiYuan

Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.

  1. 1d agoSiYuanSiYuan 3.8.1 stabilises the agent, skills and Responses API work
  2. 2d agoSiYuanSlash menu items become configurable; table column widths distribute evenly
  3. 3d agoSiYuanTable headers left-align by default; double-click closes tabs
  4. 3d agoSiYuanUser-level agent skills and virtualized grouped-table rendering
  5. 4d agoSiYuanAI features move to the OpenAI Responses API
  6. 5d agoSiYuanAgent panel gains a shortcut; blockquote input fixed
  7. 1mo agoFlarumFlarum 2.0 release candidate 5
  8. 2mo agoFlarumFlarum 2.0 release candidate 4
  9. 2mo agoFlarumFlarum 2.0 release candidate 3
  10. 2mo agoFlarumFlarum 2.0 release candidate 2
  11. 4mo agoFlarumFlarum 2.0 RC1 fixes discussion-list and notification query costs
  12. 4mo agoFlarumFlarum 2.0 beta 8 smooths discussion loading

Frequently asked questions

What is the difference between Flarum and SiYuan?

They serve adjacent needs but don't currently overlap on shipped themes. SiYuan is currently shipping more aggressively (velocity 6.3 vs 2.5), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.

Is Flarum better than SiYuan?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. SiYuan is currently shipping more aggressively (velocity 6.3 vs 2.5), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Collab products to evaluate alongside.

What are the best alternatives to Flarum?

Top Flarum alternatives in Collab are ranked by recent ship velocity. Browse the "Flarum alternatives" section above for the current picks, or visit /alternatives/flarum for the full list with editorial commentary on each.

What are the best alternatives to SiYuan?

Top SiYuan alternatives in Collab are ranked by recent ship velocity. Browse the "SiYuan alternatives" section above for the current picks, or visit /alternatives/siyuan for the full list with editorial commentary on each.