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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.

Circle vs SiYuan: at a glance

FeatureCircleSiYuan
SectorCollabCollab
Velocity score6.35.0
Sparks · 30d00
Top themescommunity-platform, ai-agents, website-builder, mcpnote-taking, knowledge base, ai agent, databases
Last editorial update2mo ago22h ago
WebsiteVisit →Visit →

What is Circle?

Circle rebuilt itself around an AI that runs the community, and now builds its landing pages too.

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, re-skinned both member and admin surfaces and brought an AI layer with memory, roughly fifty domain-specific skills and project workspaces. August extends that AI outward: it now builds complete pages from a prompt or an existing URL — homepages, sales pages, event pages in the operator's brand — generating copy and images and running SEO audits inside the builder. The rest of the release is retention plumbing: a Get Started onboarding checklist on web and mobile, live emoji reactions in chats and rooms, customizable member directory filters, and native mobile video recording.

Read the full Circle trajectory →

What is SiYuan?

SiYuan 3.8.9 reaches RC, adding AI-agent extraction of images embedded in PDFs.

SiYuan moved 3.8.9 from beta.6 to rc.1 on Oct 28. The RC's only new item is AI-agent extraction of images embedded in PDFs; the rest of its long list matches beta.5's cumulative notes: pinned agent sessions, backlink filtering by database fields, block-reference collection through database automation, resizable table rows, mind-map themes and node copy/paste, TIFF previews and macOS proxy detection.

Read the full SiYuan trajectory →

Circle vs SiYuan: editorial side-by-side

C
Circle
COLLAB
6.3

Circle rebuilt itself around an AI that runs the community, and now builds its landing pages too.

◆ 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, re-skinned both member and admin surfaces and brought an AI layer with memory, roughly fifty domain-specific skills and project workspaces. August extends that AI outward: it now builds complete pages from a prompt or an existing URL — homepages, sales pages, event pages in the operator's brand — generating copy and images and running SEO audits inside the builder. The rest of the release is retention plumbing: a Get Started onboarding checklist on web and mobile, live emoji reactions in chats and rooms, customizable member directory filters, and native mobile video recording.

◆ Where it's heading

The community platform keeps being reframed as a business-operations platform: Discover 2.0 supplies member demand, Circle AI does the structuring work, Circle Studios sells the operating labor outright. The page builder fills the one gap in that loop — the acquisition surface an operator previously built somewhere else — and shipping SEO audits with it says Circle intends to own how communities get found, not just how they run. Circle MCP in April remains the tell that the operator was always expected to be an agent. Underneath, the retention items this month are the unglamorous half of the same funnel argument.

◆ Prediction

The fifty Circle AI skills are the surface most likely to open next, either to operator-authored skills or to skills invoked through Circle MCP rather than only in the Circle UI. Expect page building and Discover to connect, so a generated sales page feeds the marketplace listing directly.

S
SiYuan
COLLAB
5.0

SiYuan 3.8.9 reaches RC, adding AI-agent extraction of images embedded in PDFs.

◆ Current state

SiYuan moved 3.8.9 from beta.6 to rc.1 on Oct 28. The RC's only new item is AI-agent extraction of images embedded in PDFs; the rest of its long list matches beta.5's cumulative notes: pinned agent sessions, backlink filtering by database fields, block-reference collection through database automation, resizable table rows, mind-map themes and node copy/paste, TIFF previews and macOS proxy detection.

◆ Where it's heading

The 3.8.x line keeps turning databases and mind maps into structured tools that act on the block graph, and the built-in agent is gaining reach into document content such as PDFs. The release cadence is fast and noisy, with most builds repeating the same cumulative notes.

◆ Prediction

A stable 3.8.9 is likely within days, with little added beyond fixes now that it has reached RC.

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.

See all Circle alternatives → · See all SiYuan alternatives →

Recent activity from Circle and SiYuan

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

  1. 1d agoSiYuanSiYuan 3.8.9 RC1: AI agent extracts images from PDFs
  2. 1d agoSiYuanSiYuan 3.8.9 beta 6 (same notes as beta 5)
  3. 1d agoSiYuanSiYuan 3.8.9 beta 5: full notes incl. pinned agent sessions
  4. 2d agoSiYuanSiYuan 3.8.9 beta 4 improves LaTeX paste and import
  5. 2d agoSiYuanSiYuan 3.8.9 beta 3 (same notes as beta 1)
  6. 2d agoSiYuanSiYuan 3.8.9 beta 2 (same notes as beta 1)
  7. 2mo agoCircleAugust release: AI website builder, live reactions, and more
  8. 3mo agoCircleCircle Eclipse is available to everyone ⚡
  9. 4mo agoCircleCircle Eclipse 2026: Introducing Circle AI, Discover, Studios, and more ⚡
  10. 5mo agoCircle📲 May release: Public webinars, new custom app builder templates, and more
  11. 6mo agoCircle🔗 April release: Circle MCP, AI agent upgrades, and more ⚡
  12. 7mo agoCircle🗺️ March release: Member map, video recorder, and more

Frequently asked questions

What is the difference between Circle and SiYuan?

They serve adjacent needs but don't currently overlap on shipped themes. Circle is currently shipping more aggressively (velocity 6.3 vs 5.0), 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 Circle better than SiYuan?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Circle is currently shipping more aggressively (velocity 6.3 vs 5.0), 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 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.