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Comparison · DevOps
NATS vs Stirling-PDF
A side-by-side editorial comparison of NATS and Stirling-PDF — release velocity, themes, recent moves, and the top alternatives to consider.
NATS vs Stirling-PDF: at a glance
What is NATS?
NATS second release candidates add a config reload check and faster redelivery queues.
NATS keeps the 2.14 and 2.15 lines in step, and on November 6 both got a second release candidate. The RCs make filtered filestore scans skip non-matching messages, stop redelivery queues from copying whole backlogs on each dequeue, and fix AckAll and gateway interest bugs. 2.15.3-RC.2 also adds a -t --test_reload flag that tells operators whether a config change needs a restart.
What is Stirling-PDF?
Stirling PDF plans to drop LibreOffice for its own converter within two weeks
Stirling PDF 3.0 in late September added the PDF Processor for bulk jobs, optional AI and free OAuth SSO. Releases since have come about every two weeks: group signing by default in 3.1.0, a Page Editor in 3.2.0, viewer and annotation work in 3.2.x. 3.3.0 lets users pick the beta Stirling Office Convert in many more tools and adds Windows ARM64, lighter mobile scanning and caching.
NATS vs Stirling-PDF: editorial side-by-side
NATS
5.0DEVOPS
NATS second release candidates add a config reload check and faster redelivery queues.
◆ Current state
NATS keeps the 2.14 and 2.15 lines in step, and on November 6 both got a second release candidate. The RCs make filtered filestore scans skip non-matching messages, stop redelivery queues from copying whole backlogs on each dequeue, and fix AckAll and gateway interest bugs. 2.15.3-RC.2 also adds a -t --test_reload flag that tells operators whether a config change needs a restart.
◆ Where it's heading
The project is in a hardening stretch on both lines, with JetStream efficiency and correctness fixes landing alongside small operator tools. Account-hash subject mappings from RC1 remain the main new routing feature heading to release.
◆ Prediction
Expect 2.15.3 and 2.14.10 final releases shortly, carrying the RC2 fixes and the reload check.
Stirling-PDF
5.0DEVOPS
Stirling PDF plans to drop LibreOffice for its own converter within two weeks
◆ Current state
Stirling PDF 3.0 in late September added the PDF Processor for bulk jobs, optional AI and free OAuth SSO. Releases since have come about every two weeks: group signing by default in 3.1.0, a Page Editor in 3.2.0, viewer and annotation work in 3.2.x. 3.3.0 lets users pick the beta Stirling Office Convert in many more tools and adds Windows ARM64, lighter mobile scanning and caching.
◆ Where it's heading
The project is replacing third-party dependencies with its own components. 3.3.0 says Office Convert should become the default next week and LibreOffice should be removed the week after, which would shrink the install and change conversion results for every user.
◆ Prediction
Expect Office Convert to become the default converter in the next release, then LibreOffice removed, as 3.3.0's notes lay out. Conversion bug reports will decide whether that schedule holds.
Alternatives to NATS and Stirling-PDF
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 NATS or Stirling-PDF.
Gravity Wiz
Gravity Wiz previews Flowcrafter, a visual workflow canvas for Gravity Forms.
GitLab
GitLab sells Orbit as the evidence layer for agent pilots and AI-code rules.
Zed
Zed 1.27 writes commit messages in your repo's style and trims agent memory use.
Z-Wave JS UI
Z-Wave JS UI 11.26 picks up zwave-js 15.32 and finishes the move to Node 24.
Sanity
Sanity cuts the Studio plugin out of Context so agent Insights fit any React app.
See all NATS alternatives → · See all Stirling-PDF alternatives →
Recent activity from NATS and Stirling-PDF
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 3d agoNATSNATS 2.14.10 RC2 backports JetStream redelivery and ack fixes
- 3d agoNATSNATS 2.15.3 RC2 adds a config reload check, faster redelivery
- 4d agoStirling-PDF3.3.0 Conversion upgrades, bug fixes and several minor improvements
- 7d agoNATSNATS 2.14.10 RC1 backports account-hash subject mappings
- 7d agoNATSNATS 2.15.3 RC1 adds account-hash subject mapping functions
- 14d agoNATSNATS 2.15.2 patches certificate-trust CVE via Go update
- 14d agoNATSNATS 2.14.9 picks up Go security update
- 16d agoStirling-PDF3.2.2 new annotations and other minor changes and improvements
- 18d agoStirling-PDF3.2.1 Viewer improvements and bug fixes
- 25d agoStirling-PDF3.2.0 New Multi-tool, better passworded PDFs and lots of improvements
- 1mo agoStirling-PDF3.1.0 Stirling Sign, signature improvements, Stirling Office Convert (beta) and text editor upgrades
- 1mo agoStirling-PDF3.0.2 bug fixes and dependency updates
Frequently asked questions
What is the difference between NATS and Stirling-PDF?
They serve adjacent needs but don't currently overlap on shipped themes. NATS and Stirling-PDF are shipping at a similar cadence (velocity 5.0 vs 5.0, 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 NATS better than Stirling-PDF?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. NATS and Stirling-PDF are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other DevOps products to evaluate alongside.
What are the best alternatives to NATS?
Top NATS alternatives in DevOps are ranked by recent ship velocity. Browse the "NATS alternatives" section above for the current picks, or visit /alternatives/nats for the full list with editorial commentary on each.
What are the best alternatives to Stirling-PDF?
Top Stirling-PDF alternatives in DevOps are ranked by recent ship velocity. Browse the "Stirling-PDF alternatives" section above for the current picks, or visit /alternatives/stirling-pdf for the full list with editorial commentary on each.