Tolgee
Tolgee adds OAuth 2.1 for MCP clients, making agent access a first-class login path.
Comparison · Infra & APIs
Harbor vs Keycloak
A side-by-side editorial comparison of Harbor and Keycloak — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:patch-releases
Harbor vs Keycloak: at a glance
What is Harbor?
Harbor 2.15 patches swap Redis for Valkey and tighten registry security.
Harbor is shipping 2.15.x patch candidates with security and dependency work. 2.15.2 replaced Redis with Valkey as the cache backend and moved to Go 1.26. 2.15.3 added a manifest upload size limit, blocked proxy-cache poisoning through robot-name prefixes and neutralised CSV formulas in scan exports. 2.15.4-rc1 relaxes two defaults that had caused regressions: webhooks can reach private networks and legacy signer pulls are allowed.
What is Keycloak?
Keycloak patches its 26.4 and 26.6 lines in lockstep; the tags carry no notes.
The tracked Keycloak entries are version-set commits for two supported lines, 26.4.x and 26.6.x, cut on the same day in August and again in September. The release feed carries only the version bump, so the fixes inside each patch aren't visible here.
Harbor vs Keycloak: editorial side-by-side
Harbor
5.0INFRA · APIS
Harbor 2.15 patches swap Redis for Valkey and tighten registry security.
◆ Current state
Harbor is shipping 2.15.x patch candidates with security and dependency work. 2.15.2 replaced Redis with Valkey as the cache backend and moved to Go 1.26. 2.15.3 added a manifest upload size limit, blocked proxy-cache poisoning through robot-name prefixes and neutralised CSV formulas in scan exports. 2.15.4-rc1 relaxes two defaults that had caused regressions: webhooks can reach private networks and legacy signer pulls are allowed.
◆ Where it's heading
The patch line is closing abuse paths in a registry many teams expose internally, while walking back defaults that broke existing setups. The Valkey switch shows Harbor following the wider move off Redis after its licence change.
◆ Prediction
Expect 2.15.4 to go final with the restored defaults and a refreshed Trivy; the entries don't show what the next minor release contains.
Keycloak
0.0INFRA · APIS
Keycloak patches its 26.4 and 26.6 lines in lockstep; the tags carry no notes.
◆ Current state
The tracked Keycloak entries are version-set commits for two supported lines, 26.4.x and 26.6.x, cut on the same day in August and again in September. The release feed carries only the version bump, so the fixes inside each patch aren't visible here.
◆ Where it's heading
Keycloak is maintaining two release lines in parallel with roughly monthly patch drops. Without notes in the feed, the entries show cadence and support policy, not product direction.
◆ Prediction
Another paired 26.4/26.6 patch release around early October fits the monthly pattern; the entries don't show what features are in development.
Alternatives to Harbor and Keycloak
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 Harbor or Keycloak.
ToolJet
ToolJet follows AI Builder 3 on LTS with Salesforce and signup fixes.
Tyk
Tyk's release feed is CVE dependency bumps across three maintained lines.
GitHub
GitHub's Copilot push shifts to admin plumbing: billing, account controls and agent access.
Retool
Retool's agent is wiring backends now; the self-hosted release trains keep rolling underneath.
Jackett
Jackett ships daily to keep hundreds of torrent indexers working as sites move.
See all Harbor alternatives → · See all Keycloak alternatives →
Recent activity from Harbor and Keycloak
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoHarbor2.15.4-rc1 restores private-network webhooks and legacy signer pulls
- 16d agoHarbor2.15.3-rc2: second candidate of the security patch
- 29d agoHarbor2.15.3-rc1: manifest size limit and proxy-cache poisoning fix
- 1mo agoKeycloakKeycloak 26.4.16 patch release
- 1mo agoKeycloakKeycloak 26.6.7 patch release
- 1mo agoKeycloakKeycloak 26.4.15 patch release
- 1mo agoKeycloakKeycloak 26.6.6 patch release
- 3mo agoHarbor2.15.2-rc3: Valkey replaces Redis as cache backend
- 3mo agoHarbor2.15.2-rc2: earlier candidate of the Valkey patch
Frequently asked questions
What is the difference between Harbor and Keycloak?
Both compete on the same themes — patch-releases — within Infra & APIs. Harbor 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 Harbor better than Keycloak?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Harbor 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 Harbor?
Top Harbor alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Harbor alternatives" section above for the current picks, or visit /alternatives/harbor for the full list with editorial commentary on each.
What are the best alternatives to Keycloak?
Top Keycloak alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Keycloak alternatives" section above for the current picks, or visit /alternatives/keycloak for the full list with editorial commentary on each.