head to head · open source
worldmonitor vs alerta
worldmonitor has 86,752 GitHub stars, 13,161 forks, 313 open issues and last shipped yesterday. alerta has 2,529 stars, 374 forks, 34 open issues and last shipped 3 months ago. worldmonitor leads on adoption by 3,330% (86,752 vs 2,529 stars). worldmonitor is written in TypeScript under AGPL-3.0; alerta is written in Python under Apache-2.0. worldmonitor has attracted 15% as many forks as stars, alerta 15%. worldmonitor 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
| worldmonitor | alerta | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 2.5K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | TypeScript | Python |
| Last push | 2026-09-18 | 2026-06-19 |
| Forks | ⑂ 13K | ⑂ 374 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick worldmonitor if
- You weight community size — 87K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick alerta if
- You want the alerta feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and alerta fits your workflow better
About worldmonitor
World Monitor is an open source, real time global intelligence dashboard in TypeScript that aggregates news with AI, monitors geopolitics and infrastructure, and unifies all of it into a single situational awareness interface for analysts, journalists, researchers, and operations teams who need cross domain awareness they can self host.
read the full worldmonitor overview →
About alerta
Alerta is an open source, Apache 2.0 licensed monitoring system in Python that aggregates alerts from any source into a single API driven server and web console, and it is aimed at operations and platform teams that want a scalable, low configuration alert aggregation layer instead of another polling based monitoring stack.
read the full alerta overview →
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Frequently asked questions
Is worldmonitor or alerta more popular?
worldmonitor has 86,752 GitHub stars and alerta has 2,529. worldmonitor has the larger community by that measure.
Are worldmonitor and alerta free?
Both are open source. worldmonitor is licensed under AGPL-3.0 and alerta under Apache-2.0. Neither carries a licence fee.
What is the difference between worldmonitor and alerta?
worldmonitor is written in TypeScript and alerta 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, worldmonitor or alerta?
Choose worldmonitor if you want the larger community (86,752 stars) or its AGPL-3.0 licence terms. Choose alerta if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.