Relia vs Datadog
Datadog: a full observability platform priced per product, per host and per volume. Relia: one agent that watches your whole product and tells you only what needs you.
Checked on against Datadog's own pricing page and docs. List prices in USD. Sources
Where they differ most
Pricing
Relia$12 a month, flat
Datadog$15 per host a month, per product
Free plan
Relia500,000 units, 5 uptime monitors
DatadogInfrastructure on up to 5 hosts
AI
ReliaIncluded in every plan
Datadog$1.30 per AI credit
Side by side
| Relia | Datadog | |
|---|---|---|
| Free plan | $0: 500,000 units a month (a request or a log line is 1 unit), 7 days of history, 3 services, 5 uptime monitors. | Infrastructure Free: up to 5 hosts with 1-day metric retention. APM, logs, RUM and synthetics start as free trials. |
| First paid plan | Growth, $12 a month: 5 million units, 30 days of history, 10 services, 20 uptime monitors. Pro is $29. | Priced per product. Infrastructure Pro is $15 per host a month billed annually ($18 month to month); APM is $31 per host ($36). |
| As you grow | Over the limit, normal traffic is sampled 1 in 10 and errors are always kept; nothing is cut off. Growth and Pro can add paid use at $2 per million units, with a limit you set. | Each product has its own unit: hosts, GB of logs ingested ($0.10), millions of indexed logs, thousands of sessions, test runs or seats. Hosts are metered hourly. |
| What it watches | Requests and traces, errors, logs, database calls, servers, browser sessions, web vitals, uptime checks and AI-agent runs. | Infrastructure, APM, logs, real user monitoring and session replay, synthetic tests, error tracking and many more products. |
| Uptime and status page | Uptime and synthetic checks, and a public status page kept current from Relia's own checks. | Synthetic API tests at $5 per 10,000 runs (annual). Public status pages are part of its Incident Response suite. |
| On-call | On-call rotation with escalation, Slack mentions and PagerDuty. | On-Call at $20 per seat a month and Incident Management at $30 per seat (annual). |
| What the AI does | Turns what it sees into incidents written in plain words with the evidence cited, writes fix plans with a brief for your AI assistant, and checks after you deploy whether the fix worked. | Bits AI: Bits Investigation runs a root-cause investigation when an alert fires; Bits Code can propose a fix. |
| Does it change your code | No. It has no access to your repository and never opens pull requests. A rollback or restart through your deploy platform runs only after you approve it. | Bits Code can create pull requests on GitHub, GitLab and Azure DevOps. It never auto-merges them. |
| AI price | Included in every plan, with monthly counts: Free has 300 incident write-ups, 3 fix plans and 30 questions. | AI credits at $1.30 each on demand; an investigation uses about 6.5 credits. |
| Setup | npm install relia-sdk, then npx relia init (Python: pip install relia-sdk, then python -m relia). | The Datadog Agent on each host, installed through Fleet Automation. |
Choose Datadog if
- You run many hosts and teams and want one vendor for every kind of telemetry.
- You need the breadth of its products and integrations, and someone to tune them.
- Per-host and per-volume pricing fits how your company budgets.
Choose Relia if
- You are a small team without an SRE and want one flat monthly price.
- You want to be told what needs you, in plain words, instead of building dashboards and monitors.
- You want the AI included in your plan, and nothing touching your code.
Switching from Datadog
Can I run Relia next to Datadog while I decide?
Yes. Relia installs as its own SDK and removes nothing, so you can run both while you compare. If your app already runs an OpenTelemetry tracer provider, Relia adds itself to it instead of starting a second one.
How long does setup take?
About five minutes: npm install relia-sdk, then npx relia init, which signs you in, asks what to watch and writes one file. Python apps use pip install relia-sdk, then python -m relia.
Does Relia change my code or open pull requests?
No. Relia has no access to your repository and never opens pull requests. It never acts on your servers on its own either: a rollback or restart it proposes through a platform you connected runs only after an owner or admin approves it. It writes a fix plan from the incident's evidence, with a brief you can copy into your AI assistant, and after you deploy it checks live traffic to tell you whether the fix worked.
What happens when I go over my plan's units?
Nothing is cut off. Normal traffic is sampled 1 in 10 and errors are always kept. On Growth and Pro you can switch on paid extra use at $2 per million units, with a limit you set.
How soon does Relia know what normal looks like for my app?
It starts learning from the first request and builds its picture of normal from about four weeks of your own traffic.
Sources
Every statement about Datadog on this page comes from these pages, read on 20 October 2026. Prices and plans change; if something here is out of date, tell us at relia@alaknandainfoplus.com.