Best Self-Hosted Alternatives to Datadog
Datadog is comprehensive observability with a bill that scales right along with your hosts and log volume — it's often the single largest line item on an infra bill once an org is past a handful of services. The self-hosted stacks below cover the same ground — metrics, logs, traces, dashboards — on servers you size and pay for once.
Datadog costs about $180/year and keeps your data on its servers. These researched, open-source alternatives give you the same workflow on hardware you own — here's what each needs to run.
The alternatives
What you give up by leaving Datadog
Leaving Datadog means giving up its single pane of glass across 800+ integrations, elastic ingest that never asks you to size a database, long retention without planning your own storage, and correlated dashboards that just work across metrics, logs, and traces out of the box. Self-hosting — whether an all-in-one like SigNoz or a component stack of Prometheus, Loki, and Grafana — trades that for a bill that stops growing with your data, at the cost of becoming the team that sizes ClickHouse or OpenSearch, plans retention, and gets paged when the observability stack itself falls over. It's a real win for cost-conscious teams with the ops capacity to run it; it's a trap for teams who don't yet have that capacity.
Common questions
Are these Datadog alternatives really free?
The software is open-source and free to run. Your only cost is the server it runs on — often a few dollars a month, less than most SaaS subscriptions.
How much server do I need to self-host one?
Most of these run comfortably on a small VPS — 1–2 GB of RAM is enough for a single-user or small-team setup. Each app's page lists its minimum RAM.
Will I lose features by leaving Datadog?
It depends on the app. The alternatives below cover the core workflow; polish and integrations vary, so check each one's stack and difficulty before you commit.