Cursor
Cursor puts its cloud agent environments behind an API and lets agents ship interactive canvases.
Comparison · Infra & APIs
Sonarr vs Stacker
A side-by-side editorial comparison of Sonarr and Stacker — release velocity, themes, recent moves, and the top alternatives to consider.
Sonarr vs Stacker: at a glance
What is Sonarr?
Sonarr's 5.0 builds move from UI rework to safer restores and keyboard-friendly selects.
Sonarr is iterating on 5.0 builds while 4.0.x receives only occasional patches. 5.0.0.2569 removed Basic Auth, defunct IMDb lists and Kometa metadata, and 5.0.0.2608 fails executables and risky files by default for most indexers. 5.0.0.2635 reworked the UI from Discord feedback, and 5.0.0.2668 now validates a restored database and keeps the previous one until the restore completes, alongside keyboard shortcut fixes and type-ahead in selects.
What is Stacker?
Stacker's AI agent has absorbed every part of app building except the data itself.
Stacker builds internal tools and customer portals on top of existing data. From late October 2025 the entire changelog is one project: an AI Builder Agent that generates and edits apps by conversation. In under seven weeks it went from generating initial pages and layouts to editing tables and fields, creating lookups, rollups and formulas, reshaping create forms, reordering navigation, building white-labelled external portals with custom domains and permissions, and finally taking a spreadsheet upload and configuring a schema and matching layouts from it.
Sonarr vs Stacker: editorial side-by-side
Sonarr
5.0INFRA · APIS
Sonarr's 5.0 builds move from UI rework to safer restores and keyboard-friendly selects.
◆ Current state
Sonarr is iterating on 5.0 builds while 4.0.x receives only occasional patches. 5.0.0.2569 removed Basic Auth, defunct IMDb lists and Kometa metadata, and 5.0.0.2608 fails executables and risky files by default for most indexers. 5.0.0.2635 reworked the UI from Discord feedback, and 5.0.0.2668 now validates a restored database and keeps the previous one until the restore completes, alongside keyboard shortcut fixes and type-ahead in selects.
◆ Where it's heading
5.0 is a hardening release: legacy auth and integrations gone, safer handling of what downloads may land, and now a safer restore path. Four builds in six days, each mixing fixes with small UX work, point to a testing phase that is narrowing toward polish rather than adding scope.
◆ Prediction
Expect more 5.0.0 builds focused on UI fixes and edge cases; when 5.0 replaces 4.x as the default track is not clear from these entries.
Stacker
0.0INFRA · APIS
Stacker's AI agent has absorbed every part of app building except the data itself.
◆ Current state
Stacker builds internal tools and customer portals on top of existing data. From late October 2025 the entire changelog is one project: an AI Builder Agent that generates and edits apps by conversation. In under seven weeks it went from generating initial pages and layouts to editing tables and fields, creating lookups, rollups and formulas, reshaping create forms, reordering navigation, building white-labelled external portals with custom domains and permissions, and finally taking a spreadsheet upload and configuring a schema and matching layouts from it.
◆ Where it's heading
The sequencing is deliberate: each release hands the agent one more thing that previously required the no-code editor, while the company repeatedly reassures users that the full editor still works on AI-built apps. That dual framing — build by conversation, refine by hand — is the position Stacker is defending, and it is a reasonable answer to pure prompt-to-app tools that leave nothing to adjust afterwards. The portal release is the notable widening, since it points the agent at the external-user product rather than internal tools.
◆ Prediction
Every surface except data connection has now been handed to the agent; connecting and mapping an external source — the step still done manually before any of this works — is the remaining gap, and the spreadsheet uploader is the first move toward closing it.
Alternatives to Sonarr and Stacker
Other Infra & APIs 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 Sonarr or Stacker.
Railway
Railway is adding guardrails for teams moving off the dashboard and into code and the CLI.
Jackett
Jackett ships daily to keep hundreds of torrent indexers working as sites move and close.
CircleCI
CircleCI now sizes parallelism to the tests Smarter Testing actually selects.
GitHub
GitHub makes open source license compliance a ruleset-enforced GA for Enterprise Cloud.
Aviator
Aviator's MergeQueue now has an LLM tell flaky failures from real ones and rerun them.
See all Sonarr alternatives → · See all Stacker alternatives →
Recent activity from Sonarr and Stacker
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 7h agoSonarrSonarr 5.0 build validates database restores, adds type-ahead
- 1d agoSonarrSonarr 5.0 build reworks UI from tester feedback
- 2d agoSonarrSonarr 5.0 build blocks executables and risky files by default
- 5d agoSonarrSonarr 5.0 build removes Basic Auth and defunct IMDb lists
- 1mo agoSonarrSonarr 4.0.20: Jellyfin auth header + language DB fix
- 1mo agoSonarrv2.6.5.5620: Multiple Translations updated by Weblate
- 10mo agoStackerUpload your spreadsheet, let AI do the rest
- 10mo agoStackerBuild customer portals using AI Agent
- 10mo agoStackerReorder your navigation with a conversation
- 11mo agoStackerManage create forms with AI
- 11mo agoStackerAsk the AI Builder Agent to bring in data from other tables
- 11mo agoStackerBuild faster with AI and No-Code, together.
Frequently asked questions
What is the difference between Sonarr and Stacker?
They serve adjacent needs but don't currently overlap on shipped themes. Sonarr is currently shipping more aggressively (velocity 5.0 vs 0.0), 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 Sonarr better than Stacker?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Sonarr is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Infra & APIs products to evaluate alongside.
What are the best alternatives to Sonarr?
Top Sonarr alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Sonarr alternatives" section above for the current picks, or visit /alternatives/sonarr for the full list with editorial commentary on each.
What are the best alternatives to Stacker?
Top Stacker alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Stacker alternatives" section above for the current picks, or visit /alternatives/stacker for the full list with editorial commentary on each.