head to head · open source
Sentry vs RedELK
Sentry has 44,806 GitHub stars, 4,857 forks, 2,265 open issues and last shipped today. RedELK has 2,670 stars, 390 forks, 13 open issues and last shipped 2 days ago. Sentry leads on adoption by 1,578% (44,806 vs 2,670 stars). Sentry is written in Python under a custom or non-standard licence; RedELK is written in Python under BSD-3-Clause. Sentry has attracted 11% as many forks as stars, RedELK 15%. Sentry was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (monitoring), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Sentry | RedELK | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 2.7K |
| License | Custom / other | BSD-3-Clause |
| Written in | Python | Python |
| Last push | 2026-09-20 | 2026-09-18 |
| Forks | ⑂ 4.9K | ⑂ 390 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Sentry if
- You weight community size — 45K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick RedELK if
- You want the RedELK feature set and don't need the biggest community
- You prefer the BSD-3-Clause license terms
- Your stack matches Python
- You evaluated both and RedELK fits your workflow better
About Sentry
Sentry is an open source debugging platform for detecting, tracing, and fixing software issues in real time. It lives in the developer infrastructure ecosystem and provides error tracking and performance monitoring across languages, frameworks, and runtime environments.
read the full Sentry overview →
About RedELK
RedELK is a red team's SIEM — an Elasticsearch, Logstash and Kibana based system that collects operational logs from red team teamservers and traffic logs from redirectors into one enriched central location, built for red team operators and for the white teams that need oversight of long running engagements.
read the full RedELK overview →
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Frequently asked questions
Is Sentry or RedELK more popular?
Sentry has 44,806 GitHub stars and RedELK has 2,670. Sentry has the larger community by that measure.
Are Sentry and RedELK free?
Both are open source. Sentry has no licence declared in this registry, and RedELK is licensed under BSD-3-Clause. Both are free to self-host.
What is the difference between Sentry and RedELK?
Sentry is written in Python and RedELK in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Sentry or RedELK?
Choose Sentry if you want the larger community (44,806 stars) or its Custom / other licence terms. Choose RedELK if its feature set, stack or BSD-3-Clause licence fits better. Both are self-hostable.