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Comparison · Collab
SiYuan vs Radarr
A side-by-side editorial comparison of SiYuan and Radarr — release velocity, themes, recent moves, and the top alternatives to consider.
SiYuan vs Radarr: at a glance
What is SiYuan?
SiYuan's 3.8 branch turns a local-first notebook into an agent-readable knowledge store.
SiYuan publishes near-daily alpha tags whose notes are cumulative, so each release restates the previous one's feature list and appends what is new. The 3.7.4 line was pure enhancement work — Android and HarmonyOS parity, export fidelity, Pandoc packaging, drag-and-drop and font handling. The 3.8.0 line, opened on 4 August, carries four genuinely new features that had no predecessor in 3.7.4: OIDC authentication, an AI Agent, semantic search via embeddings and reranking, and MCP support.
What is Radarr?
Radarr is in steady maintenance, with one new download client the only visible addition
Radarr ships small builds on parallel develop and master branches, typically a handful of commits each. The recent stream is almost entirely correctness work — HTTP request disposal, deferred JSON deserialisation, malformed cookie handling, qBittorrent basic auth, an SQLite busy timeout raised to 1000ms — plus translation updates. The single functional addition is an RQBit download client.
SiYuan vs Radarr: editorial side-by-side
SiYuan
6.3COLLAB
SiYuan's 3.8 branch turns a local-first notebook into an agent-readable knowledge store.
◆ Current state
SiYuan publishes near-daily alpha tags whose notes are cumulative, so each release restates the previous one's feature list and appends what is new. The 3.7.4 line was pure enhancement work — Android and HarmonyOS parity, export fidelity, Pandoc packaging, drag-and-drop and font handling. The 3.8.0 line, opened on 4 August, carries four genuinely new features that had no predecessor in 3.7.4: OIDC authentication, an AI Agent, semantic search via embeddings and reranking, and MCP support.
◆ Where it's heading
The mobile and export grind continues underneath, but the branch cut is where the direction changed. Semantic search plus MCP means the vault becomes queryable by meaning and reachable by external agents, while OIDC is the first real answer for multi-user or organizational deployment — a notable turn for a product built around single-user local storage. The alpha.3 addition of LAN peer-assisted sync acceleration points the same way: sync is being optimized for several devices, or several people, on one network.
◆ Prediction
Expect the 3.8 alphas to keep layering onto the AI Agent and MCP surfaces — most likely which blocks or notebooks an agent may read, since OIDC arriving in the same release implies identity is about to gate access rather than just login.
Radarr
5.0COLLAB
Radarr is in steady maintenance, with one new download client the only visible addition
◆ Current state
Radarr ships small builds on parallel develop and master branches, typically a handful of commits each. The recent stream is almost entirely correctness work — HTTP request disposal, deferred JSON deserialisation, malformed cookie handling, qBittorrent basic auth, an SQLite busy timeout raised to 1000ms — plus translation updates. The single functional addition is an RQBit download client.
◆ Where it's heading
Version numbers are moving quickly through 6.1 to 6.4, but the changes behind them are patch-sized; the major.minor increments track branch mechanics rather than feature milestones. The work that is happening targets reliability under load and with third-party clients, which is where a long-running background service accumulates problems.
◆ Prediction
Expect the develop-branch build cadence to continue with further download client and indexer compatibility fixes; nothing here signals a larger release in preparation.
Alternatives to SiYuan and Radarr
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 SiYuan or Radarr.
Readarr
Six releases of small fixes and translations, then nothing since June 2025.
LibrePhotos
Five repos became one, and the authorization model got a public-safe user view.
Komga
A mature media server whose releases are format edge cases and Kobo plumbing.
Prowlarr
A steady indexer-maintenance cadence: fixes, definitions, translations, repeat.
noVNC
noVNC ships about once a year, and its betas and finals carry identical notes.
See all SiYuan alternatives → · See all Radarr alternatives →
Recent activity from SiYuan and Radarr
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 12h agoSiYuanSiYuan 3.8.0-alpha.3 adds LAN peer-assisted sync acceleration
- 1d agoSiYuanSiYuan v3.8.0-alpha.2
- 1d agoSiYuanSiYuan 3.8 opens with AI Agent, semantic search, MCP, and OIDC ⚡
- 4d agoRadarrRadarr 6.4.1: RQBit download client support
- 4d agoSiYuanSiYuan 3.7.4-alpha.6: tab dragging, child docs, S Pen hover
- 5d agoSiYuanSiYuan 3.7.4-alpha.5: database performance and mobile audio recording
- 5d agoSiYuanSiYuan 3.7.4-alpha.4: S Pen popovers and export file handling
- 10d agoRadarrRadarr 6.4.0 build 10540: HTTP and JSON handling cleanup
- 17d agoRadarrRadarr 6.4.0 develop bump and cookie handling fix
- 24d agoRadarrRadarr 6.3.0 master build: translations and CI fix
- 25d agoRadarrRadarr 6.3.0 develop build: streaming extension probe fix
- 1mo agoRadarrRadarr 6.2.1: qBittorrent basic auth and SQLite timeout fixes
Frequently asked questions
What is the difference between SiYuan and Radarr?
They serve adjacent needs but don't currently overlap on shipped themes. SiYuan is currently shipping more aggressively (velocity 6.3 vs 5.0), with 1 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 SiYuan better than Radarr?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. SiYuan is currently shipping more aggressively (velocity 6.3 vs 5.0), with 1 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 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.
What are the best alternatives to Radarr?
Top Radarr alternatives in Collab are ranked by recent ship velocity. Browse the "Radarr alternatives" section above for the current picks, or visit /alternatives/radarr for the full list with editorial commentary on each.