collectd vs Telegraf
A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | collectd | Telegraf |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Health score | 60 · Good | 95 · Excellent |
| Category | Monitoring & Status | Monitoring & Status |
| License | MIT | MIT |
| Language | C | Go |
| Setup difficulty | Medium | Easy |
| Min. RAM | 32 MB | 64 MB |
| Deployment | bare-metal, binary | docker, kubernetes, binary |
| GitHub stars | ★ 3,365 | ★ 17,825 |
| First released | 2005 | 2015 |
| Replaces | Datadog Agent | Datadog Agent |
What are collectd and Telegraf?
collectd
collectd is a small daemon that periodically collects system and application performance metrics. It stores or forwards the data through a large set of read and write plugins for further processing.
- Minimal resource usage
- Over 100 plugins
- Runs on embedded systems
- Network forwarding support
Telegraf
Telegraf is a plugin-driven agent for collecting, processing, aggregating, and writing metrics and events. It has hundreds of input and output plugins covering systems, databases, IoT sensors, and cloud services.
- Hundreds of input plugins
- Single static binary
- Low resource footprint
- Outputs to many backends
collectd vs Telegraf: key differences
Collectd is written in C, while Telegraf is built with Go. Collectd is the lighter option, starting around 32 MB of RAM against 64 MB for Telegraf. Collectd is the more established project (first released 2005), while Telegraf arrived in 2015. Telegraf has the considerably larger community, at 17,825 GitHub stars versus 3,365. Telegraf lists first-class Docker deployment; collectd does not.
Why pick each one
Choose collectd if…
- Extremely lightweight
- Runs almost anywhere
Watch out for
- Configuration is low-level
- No native dashboard
Choose Telegraf if…
- Huge plugin catalog
- Trivial to deploy
Watch out for
- Configuration can get verbose
- No built-in UI
Frequently asked questions
Is collectd or Telegraf better?
Telegraf is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider collectd if its specific feature set fits your needs better.
Are collectd and Telegraf free and open-source?
Yes. collectd is licensed under MIT and Telegraf under MIT. Both can be self-hosted at no software cost.
Can I run collectd and Telegraf with Docker?
collectd: check the project docs for container support. Telegraf: yes.
Which is lighter on resources, collectd or Telegraf?
collectd has the smaller minimum footprint at 32 MB of RAM, compared to about 64 MB for Telegraf. Real-world usage depends on library size, user count, and enabled features.