collectd vs Process Exporter

A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.

Not the right match-up? Compare collectd with Compare Process Exporter with

CO collectd Lightweight system statistics collection daemon VS PR Process Exporter Prometheus exporter for per-process metrics

Feature	collectd	Process Exporter
Deploy effort	Read-the-docs project	Under-an-hour setup
Health score	60 · Good	25 · At risk
Category	Monitoring & Status	Monitoring & Status
License	MIT	MIT
Language	C	Go
Setup difficulty	Medium	Medium
Min. RAM	32 MB	64 MB
Deployment	bare-metal, binary	docker, binary
GitHub stars	★ 3,365	★ 2,155
First released	2005	2016
Replaces	Datadog Agent	Datadog Agent

What are collectd and Process Exporter?

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

Read the full collectd guide →

Process Exporter

process-exporter exposes per-process and per-process-group CPU, memory, and IO metrics for Prometheus. It enables fine-grained resource attribution on busy hosts.

Per-process metrics
Process group aggregation
CPU, memory, IO data
Prometheus compatible

collectd vs Process Exporter: key differences

Collectd is written in C, while Process Exporter is built with Go. Collectd is the lighter option, starting around 32 MB of RAM against 64 MB for Process Exporter. Collectd is the more established project (first released 2005), while Process Exporter arrived in 2016. Process Exporter 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

collectd details

Choose Process Exporter if…

Released under the MIT license
First-class Docker support for quick deployment
Active community (2.2k GitHub stars)
Written in Go

Process Exporter details

Frequently asked questions

Is collectd or Process Exporter better?

Neither is universally better. collectd has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.

Are collectd and Process Exporter free and open-source?

Yes. collectd is licensed under MIT and Process Exporter under MIT. Both can be self-hosted at no software cost.

Can I run collectd and Process Exporter with Docker?

collectd: check the project docs for container support. Process Exporter: yes.

Which is lighter on resources, collectd or Process Exporter?

collectd has the smaller minimum footprint at 32 MB of RAM, compared to about 64 MB for Process Exporter. Real-world usage depends on library size, user count, and enabled features.