Best Free Error Tracking Tools in 2026
Error tracking is one of the few tools where the free tier is often permanently sufficient, because the metric is errors and a healthy application does not produce many.
That also creates the category's peculiar irony: the free plan works until your software gets worse. A quiet month costs nothing; the week something breaks in production is the week you exhaust the allowance and lose visibility precisely when you need it.
Here is what each free tier covers, checked August 2026.
Quick comparison
| Tool | Free tier | Paid entry |
|---|---|---|
| Highlight | Free cloud tier, self-hostable | Usage-based |
| Sentry | 1 user, 5,000 errors/mo, 5M spans, 50 replays | $26/mo (Team, annual) |
| Rollbar | Free tier by error volume | By volume |
| Bugsnag | Free tier | By plan |
Sentry: the default, with the clearest free tier
Sentry's Developer plan is free for one user, with 5,000 errors a month, 5 million spans and 50 session replays, and Team starts at $26 a month billed annually.
That is the most specific free allowance in the category and it deserves reading closely, because it bundles three products. Errors are the classic offering. Spans are tracing, which tells you which request was slow rather than which one failed. Replays let you watch what the user did before the error, which is the single fastest way to reproduce a bug that only happens to one customer.
Fifty replays a month is small, and it is enough to learn whether you want them.
The one-user limit is what pushes teams to pay. Error tracking is only useful when whoever is on call can see it, so the first colleague costs $26.
Highlight: open source, and self-hostable
Highlight is open source and self-hostable, with a free cloud tier and usage-based paid plans.
Self-hosting is the differentiator, and it matters for a specific reason in this category: error payloads contain your users' data. Stack traces carry variable contents, request bodies and sometimes personal information, and session replays record what people typed. Keeping that inside your own infrastructure is a materially different posture from shipping it to a vendor.
The cloud free tier makes it easy to evaluate before deciding to run it yourself.
The trade is the usual one for self-hosting: you own the uptime of the thing that tells you when your other things are down.
Rollbar: free by volume, straightforward
Rollbar has a free tier with paid plans scaling by error volume.
Rollbar does the core job cleanly: capture, group, deduplicate, alert. Its grouping is good, which sounds minor and is the difference between one issue with four thousand occurrences and four thousand notifications.
It is less broad than Sentry, with no tracing or replay story to speak of. If you want error tracking specifically rather than an observability platform, that focus is a feature and the free tier is worth checking against your actual error volume.
Bugsnag: stability metrics rather than error lists
Bugsnag has a free tier with paid plans by usage.
Bugsnag's distinguishing idea is the stability score: what percentage of your sessions were error-free, tracked as a target rather than a list of incidents. That reframing turns error tracking from a firefighting queue into a metric you can hold a release against.
For teams shipping mobile apps in particular, where you cannot hotfix and a bad release lives in the store for days, that framing is more useful than it sounds.
What free error tracking really costs
Quota exhaustion happens at the worst moment. The allowance is consumed by errors, so a bad deploy burns a month's quota in an hour and then you are blind. Set an alert on quota consumption, not just on errors, and know what your tool does when you hit the cap: some drop events silently.
Sampling changes what you see. At volume, every tool samples. That is correct engineering and it means your dashboard shows a proportion of reality. When you are chasing a rare bug, check the sampling rate before concluding it stopped happening.
Error payloads carry user data. This is the compliance question that gets missed. Stack traces include variable values, request bodies may include personal information, and session replays record real behaviour. All of these tools offer scrubbing; configure it before you send production traffic rather than after someone asks.
Noise is the failure mode. A tool that reports everything trains people to ignore it. Grouping quality and alert routing matter more than raw capture, and they are what separate these products once the free tiers are exhausted.
Source maps are the step people skip
One setup detail decides whether error tracking is useful at all on any front-end code, and it is routinely left undone.
Your production JavaScript is minified, so a stack trace arrives pointing at line 1, column 48,203 of a bundle. That tells you nothing. Uploading source maps at build time lets the tool map that back to the file and line you actually wrote, which is the difference between an error you can fix and a string you can only file.
Every tool here supports it, usually through a build plugin that takes a few lines in your CI configuration. The reason it gets skipped is that errors still appear without it, so nothing looks broken. You only discover the gap during an incident, reading a trace that names no function you recognise.
The same applies in a different form to backend code in compiled or bundled languages. If the trace does not name your source, the tool is recording that something failed without helping you find it, which is most of the value gone for the sake of an afternoon's setup.
How to choose
For most teams, Sentry, whose free tier is the most generous and most legible, and whose $26 Team plan is the natural next step when a second person needs access.
If error data must stay in your infrastructure, Highlight, self-hosted, which is the only option here designed for that.
If you want error tracking and nothing else, Rollbar, whose focus is the point.
If you ship mobile apps, Bugsnag, because the stability score fits release decisions better than an error list does.
Whatever you choose, configure data scrubbing on day one and set an alert on your quota. Both take ten minutes and both prevent the specific failure the free tier makes likely.
Related: our guide to free monitoring tools covers the layer that tells you the service is down at all, and the Dupple reviews directory has current pricing.
FAQ
Which error tracking tool has the best free tier?
Sentry's, and it is also the most clearly specified: one user, 5,000 errors a month, 5 million spans and 50 session replays. That is enough for a small production application in normal operation, and the one-user limit is usually what forces the upgrade rather than the volume.
How much does error tracking cost?
Sentry's Team plan starts at $26 a month billed annually. Rollbar, Bugsnag and Highlight all price by usage rather than a flat entry tier, so the cost depends on your error volume. Checked August 2026.
Is a free error tracking plan enough for production?
For a small application, often yes, until something goes wrong. The risk is structural: a bad deploy generates errors fast enough to exhaust a monthly quota in an hour, leaving you without visibility during the incident. Set an alert on quota consumption so that failure is visible rather than silent.
Can I self-host error tracking?
Highlight is open source and built for it, which is the cleanest option if error data must stay inside your network. Sentry also has a self-hosted distribution, though running it well is a real operational commitment rather than a weekend task.
