head to head · open source
worldmonitor vs alertmanager
worldmonitor has 86,752 GitHub stars, 13,161 forks, 313 open issues and last shipped today. alertmanager has 8,613 stars, 2,469 forks, 419 open issues and last shipped yesterday. worldmonitor leads on adoption by 907% (86,752 vs 8,613 stars). worldmonitor is written in TypeScript under AGPL-3.0; alertmanager is written in Go under Apache-2.0. worldmonitor has attracted 15% as many forks as stars, alertmanager 29%. 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.
← all 8884 open source comparisons
Side by side
| worldmonitor | alertmanager | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 8.6K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | TypeScript | Go |
| Last push | 2026-09-18 | 2026-09-17 |
| Forks | ⑂ 13K | ⑂ 2.5K |
| 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 alertmanager if
- You want the alertmanager feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and alertmanager 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 alertmanager
Prometheus Alertmanager is the Go based, Apache 2.0 alert routing service that receives alerts from client applications such as the Prometheus server, deduplicates and groups them, and routes them to receivers including email, PagerDuty, OpsGenie, Slack and a generic webhook — it is for operations and platform teams that already run Prometheus and need notifications that are neither duplicated nor noisy.
read the full alertmanager overview →
More in Infrastructure & Operations
Related comparisons
More Monitoring & Observability projects
Compare either of these against the rest of the Monitoring & Observability field.
Frequently asked questions
Is worldmonitor or alertmanager more popular?
worldmonitor has 86,752 GitHub stars and alertmanager has 8,613. worldmonitor has the larger community by that measure.
Are worldmonitor and alertmanager free?
Both are open source. worldmonitor is licensed under AGPL-3.0 and alertmanager under Apache-2.0. Neither carries a licence fee.
What is the difference between worldmonitor and alertmanager?
worldmonitor is written in TypeScript and alertmanager in Go. 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 alertmanager?
Choose worldmonitor if you want the larger community (86,752 stars) or its AGPL-3.0 licence terms. Choose alertmanager if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.