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Comparison · Collab
BookStack vs Double
A side-by-side editorial comparison of BookStack and Double — release velocity, themes, recent moves, and the top alternatives to consider.
BookStack vs Double: at a glance
What is BookStack?
Five security releases in four months, this one closing an import RCE
BookStack's release stream since v26.05 has been almost entirely security patches. This release fixes a range of issues: attachments updatable without permission, XSS through the drawing endpoints, draft endpoints altering non-draft pages, other users' drafts leaking into search results, remote code execution through crafted ZIP imports, and page visibility not updating in recycle-bin scenarios. The feature release it patches, v26.05, added a page contents view, tag API and separately controlled revision permissions.
What is Double?
Double shifts AI economics: 93%-cheaper Standard tier and Claude Opus 5 Expert mode
Double ships on a weekly cadence with broad scope each cycle — Ask Double gains new capabilities (CSV/PDF bank imports, voice input, accruals from transactions), accounting workflows deepen (interactive financial statements across all three statements, revenue share allocations, loan receivables), and the AI model economics shift materially with the September 10 Standard/Auto/Expert tiering. The product ships Scale-tier and standard features simultaneously, signaling active enterprise expansion alongside the core SMB base.
BookStack vs Double: editorial side-by-side
BookStack
5.0COLLAB
Five security releases in four months, this one closing an import RCE
◆ Current state
BookStack's release stream since v26.05 has been almost entirely security patches. This release fixes a range of issues: attachments updatable without permission, XSS through the drawing endpoints, draft endpoints altering non-draft pages, other users' drafts leaking into search results, remote code execution through crafted ZIP imports, and page visibility not updating in recycle-bin scenarios. The feature release it patches, v26.05, added a page contents view, tag API and separately controlled revision permissions.
◆ Where it's heading
The pattern is a substantial feature release followed by a run of point releases that are purely security, each crediting outside reporters. That cadence suggests sustained external scrutiny of the permission and import paths rather than a project shipping features in small increments. Every advisory in this run touches either permission checking or content handling on import and export — the two places where a self-hosted wiki with untrusted editors is most exposed.
◆ Prediction
Nothing in this stream points to the next feature release; on the current pattern the next tag is more likely to be another point release closing reported issues in the same permission and import surfaces.
Double
6.3COLLAB
Double shifts AI economics: 93%-cheaper Standard tier and Claude Opus 5 Expert mode
◆ Current state
Double ships on a weekly cadence with broad scope each cycle — Ask Double gains new capabilities (CSV/PDF bank imports, voice input, accruals from transactions), accounting workflows deepen (interactive financial statements across all three statements, revenue share allocations, loan receivables), and the AI model economics shift materially with the September 10 Standard/Auto/Expert tiering. The product ships Scale-tier and standard features simultaneously, signaling active enterprise expansion alongside the core SMB base.
◆ Where it's heading
The AI Agents private beta — scheduled automation of recurring accounting tasks across clients — is the clearest signal of where Double is heading: not AI-assisted closes but AI-executed ones, with human handoff on review steps. The Double MCP surface gains new actions each week, and the interactive financial statement suite is now complete with Cash Flow, setting the stage for cross-statement analysis. Model tiering changes the adoption math for heavy users, which could accelerate the active-usage cohort.
◆ Prediction
A general release of the AI Agents feature (currently private beta, announced in August) is the most significant move in the pipeline. More Scale features converting to standard tier is the growth pattern visible across the last 6 weeks of releases.
Alternatives to BookStack and Double
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 BookStack or Double.
Wiki.js
Wiki.js 3 beta adds Excalidraw live collaboration and SCIM — v3 production release getting close.
Wiki.js
Wiki.js 3.0 beta is building toward enterprise with real-time collaboration, SCIM, and expanding editor formats.
SiYuan
SiYuan enters a rapid alpha sprint, shipping calendar upgrades, transitive backlinks, and export extensions daily.
Happeo
Happeo is doubling down on intranet SEO content as its primary distribution channel for the mid-market.
Teable
Teable ships connected-app event triggers for automations, deepening its no-code workflow orchestration play.
See all BookStack alternatives → · See all Double alternatives →
Recent activity from BookStack and Double
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoDoubleSeptember 24, 2026
- 9d agoDoubleSeptember 17, 2026
- 16d agoDoubleSeptember 10, 2026 ⚡
- 23d agoDoubleSeptember 3, 2026
- 1mo agoDoubleAugust 27, 2026
- 1mo agoBookStackSecurity release closes a ZIP-import RCE and permission bypasses
- 1mo agoDoubleAugust 20, 2026
- 1mo agoBookStackSecurity release fixes five issues including auth matching
- 2mo agoBookStackURL filtering, redirects and permission checks hardened
- 3mo agoBookStackAttachment metadata leak and file:// export risk closed
- 4mo agoBookStackv26.05 adds page contents view, tag API and revision permissions
- 4mo agoBookStackRate limiting added to MFA verification routes
Frequently asked questions
What is the difference between BookStack and Double?
They serve adjacent needs but don't currently overlap on shipped themes. Double 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 BookStack better than Double?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Double 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 BookStack?
Top BookStack alternatives in Collab are ranked by recent ship velocity. Browse the "BookStack alternatives" section above for the current picks, or visit /alternatives/bookstack for the full list with editorial commentary on each.
What are the best alternatives to Double?
Top Double alternatives in Collab are ranked by recent ship velocity. Browse the "Double alternatives" section above for the current picks, or visit /alternatives/double for the full list with editorial commentary on each.