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Comparison · DevOps
QGroundControl vs Undertow
A side-by-side editorial comparison of QGroundControl and Undertow — release velocity, themes, recent moves, and the top alternatives to consider.
QGroundControl vs Undertow: at a glance
What is QGroundControl?
QGroundControl rebuilt its flight UI around touch screens, then went quiet for ten months
QGroundControl shipped v5.0 in July 2025 after five release candidates, patched it through 5.0.8 in October, and then published nothing until a v5.1 release candidate at the end of July 2026. The v5.0 release was the substantive event: the Fly View toolbar, instrument selection, multi-vehicle telemetry and application settings were reworked, MAVLink 2 signing arrived, and the build system was converted entirely to cmake with qmake dropped. The patch line that followed was almost purely crash and platform fixes — Mac notarization, Android SD-card permissions for API 30+, parameter-loading crashes.
What is Undertow?
Undertow 2.4.0 clears three CVEs and finally lands long-open HTTP/2 and timeout requests
Undertow's 2.4 line opened in May 2026 with a release that combines three CVE fixes with a backlog of feature requests, several of them years old judging by their issue numbers — in-flight request processing time tracking, comments in the predicate language, a configurable async context timeout replacing a hard-coded one, HTTP/2 GOAWAY connection management, a TLS protocol version exchange attribute, and a method to invalidate all cache paths. The two releases since have been small: a handful of Jiras in 2.4.1, and a 2.4.2 whose entire release note is the sentence that it was tagged.
QGroundControl vs Undertow: editorial side-by-side
QGroundControl
2.5DEVOPS
QGroundControl rebuilt its flight UI around touch screens, then went quiet for ten months
◆ Current state
QGroundControl shipped v5.0 in July 2025 after five release candidates, patched it through 5.0.8 in October, and then published nothing until a v5.1 release candidate at the end of July 2026. The v5.0 release was the substantive event: the Fly View toolbar, instrument selection, multi-vehicle telemetry and application settings were reworked, MAVLink 2 signing arrived, and the build system was converted entirely to cmake with qmake dropped. The patch line that followed was almost purely crash and platform fixes — Mac notarization, Android SD-card permissions for API 30+, parameter-loading crashes.
◆ Where it's heading
The ten-month gap between 5.0.8 and the 5.1 candidate is the clearest signal in these entries: development moved off the release feed rather than stopping, since 5.1 arrives as an RC rather than a patch. The stated design intent from v5.0 — pushing flight-to-flight settings into the toolbar and reserving Vehicle Configuration for initial setup — is a durable direction, and the touch-screen focus points at integrated controllers like Herelink as the target hardware. The RC itself carries no changelog, deferring to an external What's New page.
◆ Prediction
A v5.1 stable release should follow within weeks of the candidate, and on the v5.0 precedent it will be followed by a run of 5.1.x patches concentrated on platform packaging and crash fixes rather than features.
Undertow
0.0DEVOPS
Undertow 2.4.0 clears three CVEs and finally lands long-open HTTP/2 and timeout requests
◆ Current state
Undertow's 2.4 line opened in May 2026 with a release that combines three CVE fixes with a backlog of feature requests, several of them years old judging by their issue numbers — in-flight request processing time tracking, comments in the predicate language, a configurable async context timeout replacing a hard-coded one, HTTP/2 GOAWAY connection management, a TLS protocol version exchange attribute, and a method to invalidate all cache paths. The two releases since have been small: a handful of Jiras in 2.4.1, and a 2.4.2 whose entire release note is the sentence that it was tagged.
◆ Where it's heading
The 2.4.0 pattern — a long-deferred feature backlog shipping in the same release as security fixes — suggests features move when a release has to happen anyway rather than on their own schedule. What did ship points at operational control: timeouts that were hard-coded becoming configurable, connection lifecycle handling for HTTP/2, and attributes exposing TLS and timing detail to whatever sits above the server. Enabling test runs on JDK 25 in 2.4.1 is the only forward-looking item in the two follow-up releases.
◆ Prediction
With three entries and one substantive release among them, there is little to extrapolate from; the JDK 25 test enablement is the one thread that implies more work, pointing at runtime compatibility rather than features as the near-term focus.
Alternatives to QGroundControl and Undertow
Other DevOps 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 QGroundControl or Undertow.
Betaflight
Betaflight grew a real autopilot: waypoint missions, geofence RTH and MAVLink ground control
OceanBase
OceanBase is rebuilding itself as a RAG backend without giving up the HTAP story
Pelican
Pelican now ships roughly once a year, and 4.12 is theme housekeeping
WildFly
WildFly's quarterly train is really a stability ladder, and OIDC keeps climbing it
RESTEasy
Jakarta REST implementation in pure maintenance across two parallel branches.
See all QGroundControl alternatives → · See all Undertow alternatives →
Recent activity from QGroundControl and Undertow
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 11d agoQGroundControlQGroundControl v5.1 - Release Candidate 1
- 1mo agoUndertow2.4.2.Final
- 2mo agoUndertowUndertow 2.4.1 makes the HTTP/1.1 reason-phrase optional
- 2mo agoUndertowUndertow 2.4.0 fixes three CVEs and adds HTTP/2 GOAWAY handling
- 10mo agoQGroundControlQGroundControl v5.0.8 - Stable
- 10mo agoQGroundControlQGroundControl v5.0.7- Stable
- 1y agoQGroundControlQGroundControl V5.0 - Stable ⚡
- 1y agoQGroundControlQGroundControl v5.0 - Release Candidate 5
- 1y agoQGroundControlQGroundControl v5.0 - Release Candidate 4
Frequently asked questions
What is the difference between QGroundControl and Undertow?
They serve adjacent needs but don't currently overlap on shipped themes. QGroundControl is currently shipping more aggressively (velocity 2.5 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 QGroundControl better than Undertow?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. QGroundControl is currently shipping more aggressively (velocity 2.5 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 DevOps products to evaluate alongside.
What are the best alternatives to QGroundControl?
Top QGroundControl alternatives in DevOps are ranked by recent ship velocity. Browse the "QGroundControl alternatives" section above for the current picks, or visit /alternatives/qgroundcontrol for the full list with editorial commentary on each.
What are the best alternatives to Undertow?
Top Undertow alternatives in DevOps are ranked by recent ship velocity. Browse the "Undertow alternatives" section above for the current picks, or visit /alternatives/undertow for the full list with editorial commentary on each.