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Comparison · Collab
Double vs Jellyfin
A side-by-side editorial comparison of Double and Jellyfin — release velocity, themes, recent moves, and the top alternatives to consider.
Double vs Jellyfin: at a glance
What is Double?
Double is turning its accounting assistant into the way the work gets done
Double ships weekly, and nearly every release extends Ask Double rather than the surrounding application. In the last two months it has learned to build workpapers by reconciling accounts against supporting documents, import accruals, create and manage client metrics through the MCP and API, take voice input, and — in private beta — reach into Slack, Notion, and HubSpot. The non-assistant work fills in what firms need to trust that: role-based restrictions on editing client properties, and check transactions in AI Transactions.
What is Jellyfin?
Jellyfin renumbers to 12.0 and spends the whole cycle paying down its backend rewrite.
Jellyfin is deep in a 12.0 release-candidate train — five RCs since late June — that exists almost entirely to stabilize the backend rewrite shipped in 10.11.0. The project also renumbered along the way: 10.11.x becomes 12.x, dropping a leading "10." that had made every release read as minor. The outgoing 10.11.x stable line is still getting fixes, but 10.11.11 is down to a single locking change.
Double vs Jellyfin: editorial side-by-side
Double
6.3COLLAB
Double is turning its accounting assistant into the way the work gets done
◆ Current state
Double ships weekly, and nearly every release extends Ask Double rather than the surrounding application. In the last two months it has learned to build workpapers by reconciling accounts against supporting documents, import accruals, create and manage client metrics through the MCP and API, take voice input, and — in private beta — reach into Slack, Notion, and HubSpot. The non-assistant work fills in what firms need to trust that: role-based restrictions on editing client properties, and check transactions in AI Transactions.
◆ Where it's heading
The assistant is moving from answering questions to performing the billable work — tie-out, accrual setup, metric standardization across a whole book of clients. Each release pairs that with an access or permissions control, which is the pattern of a vendor that knows the objection is liability rather than capability. The accounting engine itself keeps advancing underneath, most recently with prepaid contracts paid in installments.
◆ Prediction
Given the review-and-signoff question these features raise, the likely next step is an approval or audit trail around what Ask Double produces rather than another task it can perform.
Jellyfin
5.0COLLAB
Jellyfin renumbers to 12.0 and spends the whole cycle paying down its backend rewrite.
◆ Current state
Jellyfin is deep in a 12.0 release-candidate train — five RCs since late June — that exists almost entirely to stabilize the backend rewrite shipped in 10.11.0. The project also renumbered along the way: 10.11.x becomes 12.x, dropping a leading "10." that had made every release read as minor. The outgoing 10.11.x stable line is still getting fixes, but 10.11.11 is down to a single locking change.
◆ Where it's heading
The RC rounds are getting narrower as the train converges. RC1 was a cumulative dump covering the move to .NET 10, removal of legacy API route middleware and deprecated API members, and an HLS transcode seeking refactor; RC5 is batched database lookups and a fix for image endpoints upscaling past the source resolution. The 10.11.x branch is now being maintained mainly as an upgrade floor — 12.0 refuses to install on anything older than 10.10.7 and runs a multi-minute migration on first boot.
◆ Prediction
With RC5 down to query batching and individual endpoint fixes, a 12.0 final looks near — likely one or two more RCs at most. The plugin story is the loose end: the RCs still tell testers to disable external plugins and reinstall from the unstable repository, and that has to resolve before a general release.
Alternatives to Double and Jellyfin
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 Double or Jellyfin.
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
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.
See all Double alternatives → · See all Jellyfin alternatives →
Recent activity from Double and Jellyfin
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 5d agoDoubleAccruals handles prepaid contracts paid in installments
- 8d agoJellyfin12.0 RC5: SQLite cache and batched lookups cut query load
- 12d agoDoubleRole-based restrictions on editing client properties
- 16d agoJellyfin12.0 RC4: MP4 track detection and SyncPlay queue fixes
- 19d agoDoubleAsk Double reaches Slack, Notion and CRM data in private beta ⚡
- 26d agoDoubleVoice input for Ask Double
- 28d agoJellyfin12.0 RC3 reworks bitrate reporting, speeds book collections
- 1mo agoDoubleCreate and manage client metrics via Ask Double and MCP
- 1mo agoDoubleAsk Double builds workpapers by reconciling accounts to documents ⚡
- 1mo agoJellyfin12.0 RC2 revamps the startup UI, defers heavy DB tasks in scans
- 1mo agoJellyfinJellyfin drops the '10.' prefix and opens 12.0 on .NET 10 ⚡
- 2mo agoJellyfin10.11.11 adds a UserManager lock helper
Frequently asked questions
What is the difference between Double and Jellyfin?
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 Double better than Jellyfin?
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 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.
What are the best alternatives to Jellyfin?
Top Jellyfin alternatives in Collab are ranked by recent ship velocity. Browse the "Jellyfin alternatives" section above for the current picks, or visit /alternatives/jellyfin for the full list with editorial commentary on each.