authentik
The first patch on 2026.8 is twenty-odd fixes and no new surface.
Comparison · Infra & APIs
Skipper vs Stacker
A side-by-side editorial comparison of Skipper and Stacker — release velocity, themes, recent moves, and the top alternatives to consider.
Skipper vs Stacker: at a glance
What is Skipper?
Skipper tags a release per commit, so four versions in an hour can mean one real change.
Skipper is Zalando HTTP router and reverse proxy, and it cuts a version tag for essentially every merged commit. Four tags landed inside one hour on 31 August: three dependency and housekeeping commits and one real optimisation that removed redundant Sprintf calls from route formatting, measured at roughly 14 percent faster route serialisation and 16 percent fewer allocations. The releases before them are the same mix, with the OIDC claim-pruning filter and the atomic Valkey SetWithExpire as the recent capability work.
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.
Skipper vs Stacker: editorial side-by-side
Skipper
6.3INFRA · APIS
Skipper tags a release per commit, so four versions in an hour can mean one real change.
◆ Current state
Skipper is Zalando HTTP router and reverse proxy, and it cuts a version tag for essentially every merged commit. Four tags landed inside one hour on 31 August: three dependency and housekeeping commits and one real optimisation that removed redundant Sprintf calls from route formatting, measured at roughly 14 percent faster route serialisation and 16 percent fewer allocations. The releases before them are the same mix, with the OIDC claim-pruning filter and the atomic Valkey SetWithExpire as the recent capability work.
◆ Where it's heading
Two kinds of change alternate on this feed: filter and backend capability arriving occasionally, and a continuous stream of dependency group bumps between them. The capability side has been concentrated on the proxy edge — OIDC claim handling, load-balancer algorithms, Valkey-backed state — while the performance work targets the route data path itself. Because the tagging is per commit, cadence here says nothing about how much shipped.
◆ Prediction
Given the benchmark-driven optimisation in this batch, further allocation work on the eskip formatting and routing path is the most likely next capability change, with dependency bumps continuing to fill the tags between.
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 Skipper 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 Skipper or Stacker.
incident.io
Alert rate limits stop being per-source and start being per-tenant, by query.
Warp
The essay series keeps running ahead of the products it describes.
Node-RED
Both lines patch on the same day, and the reverted JSONata upgrade finally sticks.
werf
The 3.x line finally ships function: authenticated secret writes and render patches.
Infisical
Folder-level RBAC lands, and approvals finally get a webhook to talk to.
See all Skipper alternatives → · See all Stacker alternatives →
Recent activity from Skipper and Stacker
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoSkipperDependency: CodeQL scanning action bumped to 4.37.9
- 2d agoSkipperRoute formatting sheds redundant Sprintf calls: ~14% faster, ~16% fewer allocations
- 2d agoSkipperDependency: 15-package Go module group bump
- 2d agoSkipperAgent skill files renamed to match the specification
- 3d agoSkipperNew OIDC filter prunes oversized claim arrays before the cookie is written
- 6d agoSkipperValkey SetWithExpire becomes a single atomic command
- 8mo agoStackerUpload your spreadsheet, let AI do the rest
- 8mo agoStackerBuild customer portals using AI Agent
- 9mo agoStackerReorder your navigation with a conversation
- 9mo agoStackerManage create forms with AI
- 9mo agoStackerAsk the AI Builder Agent to bring in data from other tables
- 9mo agoStackerBuild faster with AI and No-Code, together.
Frequently asked questions
What is the difference between Skipper and Stacker?
They serve adjacent needs but don't currently overlap on shipped themes. Skipper is currently shipping more aggressively (velocity 6.3 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 Skipper better than Stacker?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Skipper is currently shipping more aggressively (velocity 6.3 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 Skipper?
Top Skipper alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Skipper alternatives" section above for the current picks, or visit /alternatives/skipper 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.