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Comparison · Infra & APIs
Clair vs Fail2Ban
A side-by-side editorial comparison of Clair and Fail2Ban — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:open-source
Clair vs Fail2Ban: at a glance
What is Clair?
Clair 4.10 RC can read SBOMs to match Java vulnerabilities.
Clair cut its first 4.10.0 release candidate on November 13, eleven months after 4.9.0. Its Java indexers can now read CycloneDX SBOM files and treat them as the source of truth, and Red Hat's VEX data now covers Maven advisories, so Java packages in Red Hat images can be matched. It also reduces memory use when many packages share a source package.
What is Fail2Ban?
Fail2Ban finally ships 1.1.1 after 14 months in beta, with a botched deb package on the way out the door
Fail2Ban watches log files for authentication failures and bans the offending addresses through the local firewall. It remains a default component of Linux server hardening, and its release cadence has never matched that prominence — six releases in the eight years before this one. The 1.1.1 final has now landed, closing a beta that had sat unfinished since June 2025, and it installs a systemd-managed socket rather than relying solely on the daemon's own startup.
Clair vs Fail2Ban: editorial side-by-side
Clair
2.5INFRA · APIS
Clair 4.10 RC can read SBOMs to match Java vulnerabilities.
◆ Current state
Clair cut its first 4.10.0 release candidate on November 13, eleven months after 4.9.0. Its Java indexers can now read CycloneDX SBOM files and treat them as the source of truth, and Red Hat's VEX data now covers Maven advisories, so Java packages in Red Hat images can be matched. It also reduces memory use when many packages share a source package.
◆ Where it's heading
Since 4.8 Clair has moved from Red Hat's older OVAL data to VEX, and each release follows Red Hat's security data more closely. 4.10 adds SBOMs as an input, so Clair can match what an image's own manifest declares, not only what it finds on disk.
◆ Prediction
More 4.10 release candidates and then a final are likely; the long gap between releases suggests that could take weeks.
Fail2Ban
2.5INFRA · APIS
Fail2Ban finally ships 1.1.1 after 14 months in beta, with a botched deb package on the way out the door
◆ Current state
Fail2Ban watches log files for authentication failures and bans the offending addresses through the local firewall. It remains a default component of Linux server hardening, and its release cadence has never matched that prominence — six releases in the eight years before this one. The 1.1.1 final has now landed, closing a beta that had sat unfinished since June 2025, and it installs a systemd-managed socket rather than relying solely on the daemon's own startup.
◆ Where it's heading
The pattern is long silences broken by releases that mostly absorb external change — Python 3.12 and 3.13 compatibility in 1.1.0, a Dovecot filter regression in 1.0.2 — with the substance deferred to a ChangeLog the feed does not carry. What is different this time is the contributor list, which runs to a dozen first-time contributors, suggesting the delay was throughput rather than abandonment. The release also had to be re-cut: the first Debian package shipped with wrong paths from a missing systemd-dev build dependency and was pulled and replaced.
◆ Prediction
Given the beta-to-final gap just closed and the volume of first-time contributors merged into it, the useful thing to watch is whether the next release arrives in months rather than years; the entries do not indicate what it would contain.
Alternatives to Clair and Fail2Ban
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 Clair or Fail2Ban.
Payload CMS
Payload's v4 beta.9 keeps every past image crop and raises the Node floor again.
Nautobot
Nautobot 3.3 alpha 2 adds test helpers and a cable location filter after 3.2.9's token-leak fix.
Shuffle
Shuffle tags builds almost daily, but the notes are empty.
KrakenD
KrakenD's community edition is shipping only dependency bumps.
Velociraptor
Velociraptor's recent releases are mostly about patching CVEs.
See all Clair alternatives → · See all Fail2Ban alternatives →
Recent activity from Clair and Fail2Ban
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 13h agoClairClair 4.10 RC reads CycloneDX SBOMs for Java matching
- 3mo agoFail2Ban1.1.1 final lands with systemd socket activation
- 11mo agoClairClair 4.9 moves CVSS data to NVD's 2.0 feeds
- 1y agoFail2Ban1.1.1 beta, superseded 14 months later by the final
- 2y agoClairClair 4.8 replaces Red Hat OVAL data with VEX
- 2y agoClairClair 4.7.4 changes the default layer download location
- 2y agoFail2Ban1.1.0 restores Python 3.12 and 3.13 compatibility
- 2y agoClairClair 4.7.3 requires TLS 1.2 or newer
- 3y agoClairClair 4.7.2 drops the retired CRDA source
- 4y agoFail2Ban1.0.2 fixes a Dovecot filter regression
- 4y agoFail2Ban1.0.1 rolls up filter and action updates
- 5y agoFail2Ban0.11.2 stability and filter updates
Frequently asked questions
What is the difference between Clair and Fail2Ban?
Both compete on the same themes — open-source — within Infra & APIs. Clair and Fail2Ban are shipping at a similar cadence (velocity 2.5 vs 2.5, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Clair better than Fail2Ban?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Clair and Fail2Ban are shipping at a similar cadence (velocity 2.5 vs 2.5, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Infra & APIs products to evaluate alongside.
What are the best alternatives to Clair?
Top Clair alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Clair alternatives" section above for the current picks, or visit /alternatives/clair for the full list with editorial commentary on each.
What are the best alternatives to Fail2Ban?
Top Fail2Ban alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Fail2Ban alternatives" section above for the current picks, or visit /alternatives/fail2ban for the full list with editorial commentary on each.