how sixty compares — Error tracking, plus performance
Sixty vs Sentry
Best-in-class for the crash you can see. The gap is the failure that never throws — and what it stores about the person who hit it.
What Sentry is good at
Sentry is the best error tracker there is, and for the thing it does there is no argument to make against it. A stack trace with your source mapped back onto it, the release it started in, the commit that touched those lines, the breadcrumbs leading up to it, and a replay of the session — when your app throws, Sentry hands you the whole scene, and it does it within minutes of installing.
It has also moved a long way past errors. It detects N+1 database queries as first-class issues, tracks Web Vitals per route, watches for performance regressions across releases, and Seer will now open a pull request against a bug. Of everything on this page it is the closest to what Sixty does, and for most people it is already installed.
Sentry costs Free for one developer; Team from $26 a month, as published on their pricing page in August 2026. Sixty is €14.99 a month, flat.
What Sixty does differently
The difference is what counts as a problem. Sentry is built around the event — something happened, here is where. That model is exactly right for a crash and it has nothing to say about the expensive case: the request that returned 200, the query that succeeded and came back empty, the form that submitted and did nothing, the button wired to no handler. Nothing threw, so nothing is in Sentry, and somebody is still looking at a screen that does not work.
Sixty is built around the comparison instead. It has no concept of an event: it knows what this operation normally returns and how many database calls it normally makes, and it tells you when the last deploy changed that. A query that goes from thirty rows to thirty thousand throws nothing and is on the feed. So is a row-level security rule that started filtering everything, which is the most common way one of these apps breaks and produces no error anywhere.
The other honest difference is privacy, and it cuts both ways. Sentry collects an IP address by default, will hold user IDs if you attach them, and session replay records what somebody did on your page — which is genuinely useful and is why people turn it on. Sixty collects none of it and cannot: URLs are reduced to their shape and query values are stripped inside your own process, before anything is sent. That means Sixty can never tell you who hit a bug. It also means installing it adds nothing to your consent banner.
Side by side
The same eleven questions the full comparison asks of every tool, with the two rows Sixty loses left in.
| What is being compared | Sixty | Sentry |
|---|---|---|
| What you set upBefore it can tell you anything at all. | Nothing. One command, no dashboards, no thresholds | Little for errors. Sampling and alert rules for the rest |
| Time to the first findingInstall to a sentence that names a cause. | Your next deploy | Minutes for a crash. Longer for anything that does not throw |
| Compares one release to the lastAutomatically, without being asked a question. | Yes — every finding is one release against the one before | Yes — release health, and regression detection on transactions |
| Rows per call, queries per renderThe shape of what your database work returns, not how long it took. | Yes, this is the core signal | Detects N+1 spans. Does not measure rows returned |
| Page vitals per routeLargest paint, interaction response, layout shift. | Yes, broken down by country | Yes — Web Vitals per route, plus session replay |
| Failures that report successEmpty results, refused requests, buttons wired to nothing. | Yes — this is most of what it finds | Partly. A 401 or an empty result is not an event unless you make it one |
| Evidence handed to your coding agentNot a dashboard to read — a payload the thing that writes your code can act on. | Yes, over MCP, with the numbers and stack frames attached | Yes — Seer proposes fixes, and there is an MCP server |
| Data collected about your usersWhat ends up on somebody else’s server because you installed it. | None. No IDs, no cookies, no URLs, no replay | IP address by default, user IDs if you set them, replay if you enable it |
| Infrastructure, logs, containersHosts, pods, queues — the layer under the application. | No | No |
| Runtimes it measuresServer-side. Browser coverage is separate and mostly universal. | Node and Postgres. Any front end, any backend language | Everything |
| Where the bill startsList price for a comparable product, read August 2026. | €14.99 a month, flat | Free, then $26 / month |
Which one to pick
Pick Sentry when
- What you need is the stack trace for a crash, with the release and the commit attached.
- You want session replay — being able to watch what the user did before it broke.
- Your app is Python, Ruby, PHP, Go or anything else Sentry has an SDK for.
- You are already there, it is working, and errors are the whole of your problem.
Pick Sixty when
- The things breaking your app do not throw: empty lists, silent 401s, buttons that do nothing.
- You want the shape of a query watched, not just the time it took.
- You cannot or would rather not send anything about your users to a third party.
- You want every finding anchored to a deploy, because that is the only question you ever ask.
These are not mutually exclusive and the honest answer is often both. Nothing here refuses to run alongside Sentry, and a lot of people keep it.
Questions people actually ask
Should I run Sixty and Sentry together?
That is the common answer, and there is no conflict — they watch different things. Sentry catches what throws; Sixty catches what changed shape across a deploy and what fails while reporting success. If you only want one and your app crashes regularly, keep Sentry. If your app does not crash and is still going wrong, that is the case Sixty was built for.
Sentry detects N+1 queries too. What is different?
Sentry finds an N+1 pattern inside a trace — fourteen similar queries in one request, which it flags whether or not that is new. Sixty compares against the previous release: one query per render became fourteen, at this deploy, on this operation. The first tells you a shape is bad; the second tells you which change made it that way, which is the part that decides what you do next.
Does Sixty have session replay?
No, and it never will. Replay means recording what a person did on your page, and the entire design here is that nothing about your users leaves your app — no session IDs, no URLs, no page text. That is a deliberate trade: we can tell you what broke and how often, never who it happened to.
The other comparisons
Sixty vs Datadog
Everything, for everyone, billed per host. Unbeatable if you run infrastructure; a lot of product to carry if you run one app on Vercel.
Full-stack observability platformSixty vs New Relic
The same breadth as Datadog on a friendlier meter, with a genuinely large free tier — and the same afternoon of setup before it says anything.
Open-source stack, hostedSixty vs Grafana Cloud
The most flexible and the most work. Prometheus, Loki, Tempo and OpenTelemetry, hosted for you — and still a project rather than a product.
Front-end analytics, bundledSixty vs Vercel Speed Insights
Real page timings with one checkbox, from the platform you deploy to. It stops at the edge of the browser — nothing under it is measured.