Datadog is the top pick for teams that need metrics, traces, logs, and security in one place and can absorb a bill that compounds per host. If you are watching costs or only need error tracking, Sentry at $26/month or Grafana Cloud's genuinely unlimited free tier will handle most teams without the overhead.
Our Top Pick
All Options Compared
| Feature | Datadog | Sentry | Grafana Cloud | Logtail |
|---|---|---|---|---|
| Free tier | Free available | Free available | Free available | Free available |
| Paid price | $15.00 USD/mo | $26.00 USD/mo | $19.00 USD/mo | $30.00 USD/mo |
| Infrastructure Monitoring | — | — | — | |
| Apm | — | — | — | |
| Log Management | — | — | — | |
| Real User Monitoring | — | — | — | |
| Synthetic Monitoring | — | — | — | |
| Security Monitoring | — | — | — | |
| Alerting | — | |||
| Anomaly Detection | — | — | ||
| Self Hosted | Enterprise only | — | — | |
| Free Trial Days | 14 | — | — | — |
| Error Tracking | — | — | — | |
| Performance Monitoring | — | — | — | |
| Session Replay | — | — | — | |
| Source Maps | — | — | — | |
| Release Tracking | — | — | — | |
| Data Retention | — | 14-90 days by plan | — | — |
| Sdk Languages | — | 100+ languages | — | — |
| Sso | — | Business+ | — | — |
| Prometheus Compatible | — | — | — | |
| Logs Ingestion | — | — | — | |
| Distributed Tracing | — | — | — | |
| On Call Scheduling | — | — | — | |
| Dashboard Templates | — | — | — | |
| Grafana Agent | — | — | — | |
| K8s Integration | — | — | — | |
| Data Retention Free | — | — | 13 months metrics | — |
| SSO support | — | — | Pro+ | — |
| Open Telemetry Native | — | — | — | |
| Sql Querying | — | — | — | |
| Live Tail | — | — | — | |
| S3 Archival | — | — | — | |
| Trace Support | — | — | — | |
| Metrics Support | — | — | — | |
| Mcp Server | — | — | — | |
| Soc2 Type2 | — | — | — | |
| Free Retention | — | — | — | 3 days |
| Score | 8/10 | 8/10 | 8/10 | 8/10 |
1. Datadog — Best Overall
Datadog is the monitoring platform that other tools benchmark against. The Pro tier starts at $15 per host per month billed annually, but the real cost comes from buying multiple products: APM is priced separately from infrastructure at $36 per host per month, and log ingestion adds $0.10 per GB on top of retention fees. A 50-host team with APM and logs enabled can clear $5,000 a month before touching enterprise features.
What justifies that cost is breadth. Datadog covers infrastructure metrics, application traces, log management, real user monitoring, synthetic tests, and security monitoring from a single interface with over 750 integrations. APM trace-to-log correlation actually works: you click a slow trace and land directly on the logs from that request. Anomaly detection and forecasting run without manual threshold configuration, which saves real time on-call.
The free tier caps at 5 hosts with 1-day metric retention. That is enough to evaluate it, not to run anything real. There is no self-hosted option, so if your data cannot leave your cloud, this is a non-starter.
2. Sentry — Best for Error Tracking
Sentry does one thing better than anything else on this list: it tells you exactly what went wrong in your code. Stack traces include local variable values at the time of the exception, not just a traceback. Session replay links a video-like reproduction of the user session to the error that caused it, so debugging a production crash means watching what the user actually did rather than reconstructing it from logs.
The Developer plan is genuinely free with 5,000 errors per month and no time limit, and no credit card is required. The Team plan is $26 per month flat with unlimited users, which is unusually good value for a SaaS monitoring product. The catch is the quota model: if a noisy service generates a spike in errors, you hit your ceiling and Sentry drops events unless you enable pay-as-you-go overages. You can filter and deduplicate at the SDK level to control volume, but it requires attention.
Data retention on the Team plan is 14 days. Debugging something that happened three weeks ago requires the Business plan at $80 per month.
3. Grafana Cloud — Best Free Tier
Grafana Cloud's free plan is the most generous in observability: 10,000 active Prometheus metric series, 50 GB of logs per month, and 50 GB of traces per month, all without a credit card. The 14-day retention on logs and traces is the main constraint. For teams already running Prometheus, migration is a remote_write config change and nothing else.
The platform runs the full LGTM stack: Loki for logs, Grafana for dashboards, Tempo for distributed tracing, and Mimir for long-term metrics storage. Grafana dashboards are the visualization standard across the industry; the query experience and panel variety outperform most hosted alternatives. Native Kubernetes integration and support for 17 additional data sources including AWS CloudWatch means it fits into existing stacks without rebuilding anything.
Pro billing starts at $19 per month as a platform fee with usage-based charges on top. Metrics cost $8 per 1,000 active series beyond the free 10k, and a cardinality spike from an application deployment can turn a $19 month into a $200+ one fast. The alert manager and on-call setup is more complex than Datadog or Sentry, and LogQL has a real learning curve if you come from simpler tools.
4. Logtail — Best Value for Logs
Logtail, now part of Better Stack, is built on ClickHouse, which means SQL queries against logs that actually work at scale. A $30 Nano plan gets 40 GB of logs, traces, and metrics per month with 30-day retention. At equivalent data volumes, Logtail's pricing is roughly 80 times cheaper than Datadog's log ingestion rates, according to the company's own comparison, and the math on Datadog's $0.10/GB plus retention fees holds up.
The trade-off is scope. Logtail is not a full observability platform in the Datadog sense: there is no real user monitoring, no synthetic testing, and no infrastructure agent beyond OpenTelemetry. What it does cover is logs, traces, and metrics in one place via OpenTel, with a live tail that filters by attribute without writing a query, and SQL access for anything more complex. The MCP server is a notable detail: you can query your telemetry from Claude or any LLM tool that supports it.
The free tier retains logs for only 3 days, which is too short for weekend debugging. US pricing is 50% higher than European pricing, which is not obvious until you read the pricing page carefully.
How We Ranked These
We ranked primarily on observability coverage and value at realistic usage volumes, not on free-tier limits alone. Datadog leads because it is the only tool here that covers the full stack (metrics, traces, logs, RUM, security) in a single platform with trace-to-log correlation that works in production. Sentry ranks second because error tracking with variable capture and session replay is a distinct capability the others do not match. Grafana Cloud and Logtail rank by use case: Grafana for teams on Prometheus wanting managed dashboards, Logtail for teams prioritizing log cost over platform breadth.