CommaFeed
CommaFeed is patching its way through the attack surface a self-hosted reader inherits
Comparison · Collab
Circle vs SiYuan
A side-by-side editorial comparison of Circle and SiYuan — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:mcp
Circle vs SiYuan: at a glance
What is Circle?
Circle rebuilt itself around an AI that runs the community, not just answers in it
Circle ships a dated monthly release covering web, iOS, Android and its branded-app product, and the last six months have all pointed one direction. Circle Eclipse, announced in June and opened to every customer in late July, is a full re-skin of both member and admin surfaces plus a visual curriculum layout for courses. The AI layer that started as an answer bot now carries memory, roughly fifty domain-specific skills and project workspaces.
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.
Circle vs SiYuan: editorial side-by-side
Circle
3.8COLLAB
Circle rebuilt itself around an AI that runs the community, not just answers in it
◆ Current state
Circle ships a dated monthly release covering web, iOS, Android and its branded-app product, and the last six months have all pointed one direction. Circle Eclipse, announced in June and opened to every customer in late July, is a full re-skin of both member and admin surfaces plus a visual curriculum layout for courses. The AI layer that started as an answer bot now carries memory, roughly fifty domain-specific skills and project workspaces.
◆ Where it's heading
The community platform is being reframed as a business-operations platform: Discover 2.0 supplies member demand, Circle AI does the work of structuring courses and spaces, and Circle Studios sells the operating labor outright. Circle MCP in April was the tell — community data became queryable and actionable from outside tools, which is only worth building if you expect the operator to be an agent. Event and CRM plumbing (public RSVPs, contact notes, custom profile fields on forms) has been quietly upgraded underneath to feed that loop.
◆ Prediction
Expect the fifty Circle AI skills to become the surface that gets extended next — either operator-authored skills or skills that act through Circle MCP rather than only inside the Circle UI.
SiYuan
6.3COLLAB
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 Circle 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 Circle or SiYuan.
Hive
Hive ships in batches, and this one is all planning accuracy and admin control.
Teable
Teable ships daily, and the work has moved from grid features to platform governance.
Simpplr
Simpplr publishes the research that names the gap, then ships the product that closes it.
NetNewsWire
NetNewsWire's 7.1.3 train has moved from rebuilding sync to sweeping up what the rebuild disturbed.
Document360
Document360 rebuilt its API for agents; now it's turning the AI inward on authoring.
See all Circle alternatives → · See all SiYuan alternatives →
Recent activity from Circle and SiYuan
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 22h agoSiYuanSiYuan 3.8.1 stabilises the agent, skills and Responses API work
- 2d agoSiYuanSlash menu items become configurable; table column widths distribute evenly
- 2d agoSiYuanTable headers left-align by default; double-click closes tabs
- 3d agoSiYuanUser-level agent skills and virtualized grouped-table rendering
- 3d agoSiYuanAI features move to the OpenAI Responses API
- 4d agoSiYuanAgent panel gains a shortcut; blockquote input fixed
- 21d agoCircleCircle Eclipse is available to everyone ⚡
- 2mo agoCircleCircle Eclipse 2026: Introducing Circle AI, Discover, Studios, and more ⚡
- 3mo agoCircle📲 May release: Public webinars, new custom app builder templates, and more
- 4mo agoCircle🔗 April release: Circle MCP, AI agent upgrades, and more ⚡
- 5mo agoCircle🗺️ March release: Member map, video recorder, and more
- 6mo agoCircle📣 February release: Public RSVPs, contact notes, and more
Frequently asked questions
What is the difference between Circle and SiYuan?
Both compete on the same themes — mcp — within Collab. SiYuan is currently shipping more aggressively (velocity 6.3 vs 3.8), with 0 editorial sparks in the last 30 days against 1. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Circle 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 3.8), with 0 editorial sparks in the last 30 days against 1. For your specific use case, the alternatives sections above list other Collab products to evaluate alongside.
What are the best alternatives to Circle?
Top Circle alternatives in Collab are ranked by recent ship velocity. Browse the "Circle alternatives" section above for the current picks, or visit /alternatives/circle 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.