Sentry and Datadog look like competitors. They are not the same purchase. Sentry sells errors by the event: every time an SDK catches a bug, the meter runs. Datadog sells hosts by the month and logs by the gigabyte. The honest comparison is a workload, priced both ways, with the crossover volume stated. Figures as read on November 15, 2026.
Two different purchases wearing one label
The confusion starts with the word observability. Sentry is error monitoring with tracing, logs, replays and profiling attached: its centre of gravity is the error, grouped into an issue. Datadog is an observability suite: infrastructure monitoring, APM, log management, real user monitoring and more, sold as separate products with separate meters on one platform. Sentry answers "what broke, and where." Datadog answers "what is happening across the whole system." The first is a subset of the second.
The existing three-way comparisons on this site answer a different question. Our Sentry vs Rollbar vs Bugsnag comparison prices three error trackers against each other. Our Datadog vs Grafana Cloud vs New Relic playbook prices three observability suites against each other. This playbook crosses the categories: when does the tracker suffice, and when is the suite the honest comparison — priced on the same workload, not two different ones.
What each vendor actually meters
Sentry's meter is the event. Errors are sent every time an SDK catches a bug, and the plan includes a base quota: 5,000 errors a month on the free plan, 50,000 on Team and Business. Usage above the quota is billed at pay-as-you-go rates that fall as volume rises. The meter also runs on the attached products: 5 GB of logs and 5 GB of application metrics included, then $0.50 per gigabyte each; 5 million spans; 50 replays included. Our editorial analysis found the rate card the most transparent in the category — every band is published, and the page's own calculator shows the same $26 a month base and $312 a year total.
Datadog's meters are threefold. Infrastructure Monitoring is per host per month: Pro $15 a host billed annually, $18 on-demand; Enterprise $23, $27 on-demand. APM is per host per month on top: $31 a host billed annually with Infrastructure Monitoring, $36 standalone; APM Pro $35 with infrastructure, $41 standalone; APM Enterprise $40 with infrastructure, $47 standalone. Log Management is per gigabyte ingested plus per million events indexed: ingest starts at $0.10 per gigabyte, and Standard Indexing at 15-day retention is $1.70 per million log events a month. Metering rules from the billing documentation: a host is a physical or virtual OS instance, metered each hour on a high-watermark plan, and a billable APM host is one actively generating traces — uninstrumented DBs, caches and queues do not count even with APM enabled.
| Meter | Sentry | Datadog | Authority |
|---|---|---|---|
| Primary unit | Error event | Host, per month | sentry.io/pricing; datadoghq.com/pricing |
| Included volume | 5,000 errors free; 50,000 on Team/Business | 1M indexed spans per APM host/month | sentry.io/pricing; datadoghq.com/pricing |
| Overage price | $0.0003625 down to $0.0001500 per error | $0.10/GB ingested; $1.70/M events indexed | sentry.io/pricing; datadoghq.com/pricing |
| Second meter | Logs $0.50/GB beyond 5 GB | APM $31/host/month with infrastructure | sentry.io/pricing; datadoghq.com/pricing |
Sentry's rate card, worked at three volumes
Sentry's Team plan is $26 a month billed annually and includes 50,000 errors. The pay-as-you-go bands above that are $0.0003625 an error from 50,000 to 100,000; $0.0002188 from 100,000 to 500,000; $0.0001875 from 500,000 to 10 million; $0.0001625 from 10 million to 20 million; and $0.0001500 above 20 million. Each volume pays the cheaper rate only on the errors inside that band.
At 100,000 errors a month:
At 1 million errors a month:
At 10 million errors a month:
The Business plan is $80 a month billed annually and includes the same 50,000 errors, so the $54 a month difference buys no errors at all — it buys SAML and SCIM, unlimited custom dashboards against Team's 20, advanced quota management, and 1,000 metric monitors against Team's 20. At 1 million errors, Business costs $279.40 against Team's $225.40 — pay it for the administration, not the volume.
Business minus Team is $54 a month, $648 a year, for zero extra errors.
Sentry's plan comparison, above: 5,000 errors on the free plan against 50,000 on the paid plans, and the 5 GB log quota with $0.50 per gigabyte beyond it.
The free plan costs $0, is limited to one user, and includes 5,000 errors with a 30-day lookback — 5 percent of 100,000 errors a month. New users also get 5,000 free session replays a month for their first 3 months. The free tier is a trial, not a tier a production application lives on. Sentry's own documentation is candid: repeated events count against the quota, and inbound filters stop a noisy error from eating it. Spike protection exists because the meter has no ceiling of its own.
Datadog's three meters, worked on one workload
Take a concrete workload and hold it fixed: 10 hosts, 100 GB of logs ingested a month, 10 million log events indexed at 15-day retention, and 1 million errors a month. The host count is the load-bearing choice — Datadog's bill is set by hosts, not by errors.
Infrastructure Monitoring Pro at $15 a host and APM at $31 a host, both billed annually:
The log bill has two parts. Ingest is $0.10 per gigabyte; indexing at 15-day retention is $1.70 per million events. The $15 is per host, not per CPU or per GB of RAM.
Datadog's log pricing, above: the $1.70 per million indexed events and the $0.10 per ingested gigabyte the log math below is built from.
Two details are easy to miss. First, each APM host includes 1 million indexed spans a month at 15-day retention, so the 10 hosts carry 10 million indexed spans before any span overage. Second, buying APM standalone costs $36 a host rather than $31 — a $5 penalty per host, $50 a month on this workload and $600 a year — and the attached model requires Pro or Enterprise Infrastructure Monitoring on every APM host.
The reference workload, priced both ways
Sentry Team is $225.40 a month. Datadog is $487 a month. The suite costs $261.60 a month more; over three years the gap is $9,417.60.
At a different error volume the table tells a different story. At 100,000 errors, Sentry is $44.13 — less than a tenth of the Datadog total — because the suite's bill does not fall with the error count. Datadog's infrastructure-only price is $150 a month for the same 10 hosts, $75.40 cheaper than Sentry at 1 million errors — but it buys no error tracking at all.
The crossover is where the two curves meet. Sentry's bill is $26 plus banded pay-as-you-go charges; Datadog's is $487, fixed by hosts. The pay-as-you-go charges through 500,000 errors are $18.13 plus $87.52, or $105.65, so the remaining distance to $487 is $355.35 at the $0.0001875 band, which buys 1,895,200 more errors.
Below about 2.4 million errors a month, the tracker is cheaper; above it, the suite is cheaper, because Sentry's meter keeps running on every error while Datadog's does not. The crossover moves with the host count — fewer hosts pull it down, more hosts push it up — so fix the host count first.
The decision table: error volume against host count
| Situation | Buy | Monthly cost at stated volumes | Authority |
|---|---|---|---|
| Under 100K errors/month, under 10 hosts | Sentry Team | $44.13 at 100K errors | sentry.io/pricing |
| 1M errors/month, 10 hosts, logs needed | Sentry Team | $225.40 | sentry.io/pricing |
| 1M errors/month, 10 hosts, full observability needed | Datadog Pro + APM + logs | $487 | datadoghq.com/pricing |
| Over 2.4M errors/month, 10 hosts | Datadog | $487, fixed by hosts | Both pricing pages |
| Over 2.4M errors/month, 50 hosts | Sentry Team | $1,912.90 at 10M errors vs $2,327 Datadog | Both pricing pages |
The 50-host row deserves a line of its own: at 50 hosts Datadog is 50 times $46, or $2,300, plus $27 in logs — $2,327 in total — while Sentry at 10 million errors is $1,912.90. The suite that was cheaper at 10 hosts is more expensive at 50, because its meter is hosts.
Founder & CEO Insight — Enow A. Jovial
The traps that move the bill after signup
Four traps move these bills after the purchase. First, Sentry's repeated events count against the quota, so one noisy error in a loop can consume the month's allowance; inbound filters and spike protection must be configured before the incident, not during it. Second, Datadog's high-watermark host metering means an autoscaling event bills at the peak. Third, Datadog's APM price depends on the purchase path — $31 attached, $36 standalone — and the attached path requires Infrastructure Monitoring on every APM host, so a team that buys APM alone pays the standalone premium and the new host bill. Fourth, Datadog's Error Tracking has no standalone price: it ships inside APM and RUM, so a team that wants only Datadog's error tracking buys the APM meter. Our OpenTelemetry pipeline playbook covers the collection layer that feeds either vendor.
Operator boundaries: who should not buy which
A solo developer should not buy Datadog: one host with APM and logs costs $46 a month before a single error is tracked, against Sentry's free tier at $0. A team under 100,000 errors a month should not buy Datadog for error tracking alone: Sentry Team at $44.13 does the job for a tenth of the price. A team over 2.4 million errors a month on a small fleet should not stay on Sentry's pay-as-you-go bands. And a team that needs error tracking without APM should not buy Datadog at all — the APM meter is the entry ticket.
Execution checklist: run the trial on your own numbers
- [x] Step 1: Count last month's errors and hosts. Those two numbers decide the vendor, not the feature list.
- [x] Step 2: Price Sentry from the bands. Base $26, 50,000 included, then $0.0003625, $0.0002188 and $0.0001875 per error by band. Under $100 a month, Sentry wins.
- [x] Step 3: Price Datadog from the hosts. Infrastructure Pro $15 plus APM $31 per host, then logs at $0.10 a gigabyte ingested and $1.70 per million events indexed. Standalone APM is $36, not $31.
- [x] Step 4: Find your crossover. Divide the Datadog total minus $26 minus $105.65 by $0.0001875 and add 500,000. Below that number, buy Sentry; above it, buy Datadog.
- [x] Step 5: Check the Business-plan question separately. Business is $54 a month more than Team for zero extra errors. Buy it only for SAML, SCIM and the 1,000 metric monitors.
- [x] Step 6: Configure the controls before the first incident. Ship the SDK through CI/CD with inbound filters and spike protection on Sentry, and host-count alerts on Datadog.
- [x] Step 7: Annualise the decision. Run the three-year totals through the ROI calculator — at 1 million errors the gap is $9,417.60, the budget for the migration either way.
Sentry is cheaper until about 2.4 million errors a month on a 10-host fleet; Datadog is cheaper past that line, because one meter counts errors and the other counts hosts. Buy the tracker when the errors are the smaller number; buy the suite when the fleet is. Price it from your own error count and host count — the vendors publish the rates.