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Auth0 is rebuilding identity around actors that operate on someone else's behalf.
Alternatives · software development tools
Undertow alternatives
The best Undertow alternatives in software development tools, ranked by Sparkpulse's velocity_score.
Updated Aug 11, 2026
Looking for the best alternatives to Undertow? Sparkpulse tracks and ranks 12 alternatives in software development tools by shipping velocity — how frequently each ships meaningful updates, verified from official changelogs. For reference, Undertow shipped 0 meaningful updates in the last 30 days and carries a velocity score of 0.0 out of 10 in 2026. The alternatives below are ranked the same way, so you're comparing real release momentum, not marketing claims.
About 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.
Velocity 0.0 · Last update 2h ago
Top 12 alternatives to Undertow
Ranked by recent ship velocity. Tap any card for the full editorial breakdown, or pivot to a head-to-head.
DEVOPS
Betaflight grew a real autopilot: waypoint missions, geofence RTH and MAVLink ground control
DEVOPS
OceanBase is rebuilding itself as a RAG backend without giving up the HTAP story
DEVOPS
Sanity is paying down its runtime weight while wiring agents into the content layer.
DEVOPS
Meilisearch shipped 1.52, then spent the same day reverting most of it.
DEVOPS
Gravity Forms shipped 3.0 with accessibility on by default, then went back to add-on maintenance.
DEVOPS
Jakarta REST implementation in pure maintenance across two parallel branches.
DEVOPS
Rust Arrow ships monthly, with release-candidate commits cluttering the feed between them.
DEVOPS
ROS 2's release feed announces binary packages and tells you almost nothing else.
DEVOPS
Z-Wave driver where the hard problems are now smart locks and device quirks.
DEVOPS
Dapr is running three maintenance branches at once and shipping no new surface.
DEVOPS
Two maintenance branches, patched in lockstep, with release notes that say nothing but a checksum.
Undertow vs alternatives — shipping velocity at a glance
Velocity score (0–10) and meaningful releases shipped in the last 30 days, from official changelogs. Higher = shipping faster.
| Product | Velocity | Sparks · 30d | Focus areas | Latest release |
|---|---|---|---|---|
| Undertow (baseline) | 0.0 | 0 | http-serverjavahttp2 | — |
| Auth0 | 10.0 | 2 | agent-identitydelegationtoken-exchange | Custom Token Exchange - Session Delegation is now available in Open Early Access |
| Betaflight | 6.3 | 1 | fpvflight-controllerautopilot | Betaflight 2026.6.1 ships AUTOPILOT mode and waypoint missions |
| OceanBase | 6.3 | 1 | distributed-databasehtapvector-search | v4.6.0_CE |
| Sanity | 6.3 | 1 | mcpagentsbundle-size | Sanity UI v4.0.0: Smaller bundles, subpath imports, and a required stylesheet |
| Meilisearch | 6.3 | 0 | search-engineshardingdynamic-search-rules | — |
| Gravity Forms | 6.3 | 0 | wordpressformsaccessibility | — |
| RESTEasy | 5.0 | 0 | jakarta-eerest-apijava | — |
| Apache Arrow Rust | 5.0 | 0 | apache-arrowrustparquet | — |
| ROS 2 | 5.0 | 0 | roboticsmiddlewaredistribution | — |
| Z-Wave JS | 5.0 | 0 | z-wavehome-automationsmart-locks | — |
| Dapr | 5.0 | 0 | workflowsactorsmaintenance | — |
| SimpleSAMLphp | 5.0 | 0 | samlidentitysecurity-releases | — |
The 12 best Undertow alternatives, in depth
1. Auth0 · velocity 10.0
Auth0 is rebuilding identity around actors that operate on someone else's behalf.
Over the last 30 days Auth0 shipped 2 meaningful updates vs Undertow's 0, most recently “Custom Token Exchange - Session Delegation is now available in Open Early Access”. Its velocity score of 10.0/10 blends that with longer-term release cadence.
Where Undertow leans on http server, java and http2, Auth0 focuses on agent identity, delegation and token exchange.
Over the last 30 days Auth0 has been shipping faster than Undertow — a point in its favour if release momentum matters to you.
2. Betaflight · velocity 6.3
Betaflight grew a real autopilot: waypoint missions, geofence RTH and MAVLink ground control.
Over the last 30 days Betaflight shipped 1 meaningful update vs Undertow's 0, most recently “Betaflight 2026.6.1 ships AUTOPILOT mode and waypoint missions”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Undertow leans on http server, java and http2, Betaflight focuses on fpv, flight controller and autopilot.
Over the last 30 days Betaflight has been shipping faster than Undertow — a point in its favour if release momentum matters to you.
Full Betaflight trajectory → · Compare Undertow vs Betaflight →
3. OceanBase · velocity 6.3
OceanBase is rebuilding itself as a RAG backend without giving up the HTAP story.
Over the last 30 days OceanBase shipped 1 meaningful update vs Undertow's 0, most recently “v4.6.0_CE”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Undertow leans on http server, java and http2, OceanBase focuses on distributed database, htap and vector search.
Over the last 30 days OceanBase has been shipping faster than Undertow — a point in its favour if release momentum matters to you.
Full OceanBase trajectory → · Compare Undertow vs OceanBase →
4. Sanity · velocity 6.3
Sanity is paying down its runtime weight while wiring agents into the content layer.
Over the last 30 days Sanity shipped 1 meaningful update vs Undertow's 0, most recently “Sanity UI v4.0.0: Smaller bundles, subpath imports, and a required stylesheet”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Undertow leans on http server, java and http2, Sanity focuses on mcp, agents and bundle size.
Over the last 30 days Sanity has been shipping faster than Undertow — a point in its favour if release momentum matters to you.
5. Meilisearch · velocity 6.3
Meilisearch shipped 1.52, then spent the same day reverting most of it.
Its velocity score of 6.3/10 reflects longer-term release cadence.
Where Undertow leans on http server, java and http2, Meilisearch focuses on search engine, sharding and dynamic search rules.
Meilisearch and Undertow have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full Meilisearch trajectory → · Compare Undertow vs Meilisearch →
6. Gravity Forms · velocity 6.3
Gravity Forms shipped 3.0 with accessibility on by default, then went back to add-on maintenance.
Its velocity score of 6.3/10 reflects longer-term release cadence.
Where Undertow leans on http server, java and http2, Gravity Forms focuses on wordpress, forms and accessibility.
Gravity Forms and Undertow have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full Gravity Forms trajectory → · Compare Undertow vs Gravity Forms →
7. RESTEasy · velocity 5.0
Jakarta REST implementation in pure maintenance across two parallel branches.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Undertow leans on http server, java and http2, RESTEasy focuses on jakarta ee, rest api and java.
RESTEasy and Undertow have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
8. Apache Arrow Rust · velocity 5.0
Rust Arrow ships monthly, with release-candidate commits cluttering the feed between them.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Undertow leans on http server, java and http2, Apache Arrow Rust focuses on apache arrow, rust and parquet.
Apache Arrow Rust and Undertow have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full Apache Arrow Rust trajectory → · Compare Undertow vs Apache Arrow Rust →
9. ROS 2 · velocity 5.0
ROS 2's release feed announces binary packages and tells you almost nothing else.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Undertow leans on http server, java and http2, ROS 2 focuses on robotics, middleware and distribution.
ROS 2 and Undertow have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
10. Z-Wave JS · velocity 5.0
Z-Wave driver where the hard problems are now smart locks and device quirks.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Undertow leans on http server, java and http2, Z-Wave JS focuses on z wave, home automation and smart locks.
Z-Wave JS and Undertow have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full Z-Wave JS trajectory → · Compare Undertow vs Z-Wave JS →
11. Dapr · velocity 5.0
Dapr is running three maintenance branches at once and shipping no new surface.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Undertow leans on http server, java and http2, Dapr focuses on workflows, actors and maintenance.
Dapr and Undertow have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
12. SimpleSAMLphp · velocity 5.0
Two maintenance branches, patched in lockstep, with release notes that say nothing but a checksum.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Undertow leans on http server, java and http2, SimpleSAMLphp focuses on saml, identity and security releases.
SimpleSAMLphp and Undertow have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full SimpleSAMLphp trajectory → · Compare Undertow vs SimpleSAMLphp →
Frequently asked questions
What are the best alternatives to Undertow?
The top Undertow alternatives we currently track in software development tools are Auth0, Betaflight, OceanBase, Sanity, Meilisearch, ranked by recent ship velocity.
How is this list of Undertow alternatives ranked?
Alternatives are ranked by Sparkpulse's velocity_score — release cadence + 30-day spark count + sector-relative ship rate.
Can I compare Undertow directly with one of these alternatives?
Yes — every card has a "Compare with Undertow" link to a side-by-side /compare page.