how sixty compares — Platform-native monitoring
Sixty vs Vercel
Real page timings with one checkbox, and an agent that investigates your logs when something spikes. It stops where your database starts.
What Vercel is good at
It is already there, it takes one toggle, and the numbers are real — genuine Core Web Vitals from genuine visitors, attributed to routes, with none of the sampling arguments that come with synthetic testing. For finding out whether your pages are slow for the people loading them, it is the shortest path that exists, and it is anonymised in a way that keeps it out of your consent banner.
The platform has grown well past that. Observability Plus dropped its base fee in April 2026 and now bills only for the events you collect, and Vercel Agent reviews your pull requests, investigates production anomalies against your logs and metrics, and validates the patches it proposes in a sandbox before they reach the PR. If everything you run is on Vercel, a genuinely large amount of this is a switch rather than an install.
Vercel costs $10 per project per month for Speed Insights; Observability Plus and Agent are usage-only, as published on their pricing page in August 2026. Sixty is €14.99 a month, flat.
What Sixty does differently
The boundary is the database, and it has not moved. Speed Insights measures the browser; Observability measures your functions; the Agent reasons over logs and metrics. None of the three has anything to say about the query inside the function that started returning thirty thousand rows, because the row count was never in a log line for the Agent to find. For the kind of app this page is written for — a front end, a Postgres, and some functions in between — that is where the regressions live.
The second gap is that all of it starts from something looking wrong. An investigation begins when an anomaly alert fires, and page timings are a symptom that arrives late: a query whose result set grew by a thousand times barely moves the clock on a warm database with a small table, so the vitals stay green and nothing spikes for weeks, and then real data arrives and the page stops loading. Sixty watches the shape rather than the clock, which is why it can say something on the day of the deploy rather than after the incident.
And it only covers what you deploy to Vercel. Sixty is the same product whether your app is on Vercel, Render, Fly, Railway or a box — the release marker is picked up from all of them — and the browser half works with no server of yours at all.
Side by side
The same 12 questions the full comparison asks of every tool, with the two rows Sixty loses left in.
| What is being compared | Sixty | Vercel |
|---|---|---|
| What you set upBefore it can tell you anything at all. | Nothing. One command, no dashboards, no thresholds | Nothing — a toggle, a component, and the Agent is opt-in |
| Time to the first findingInstall to a sentence that names a cause. | Your next deploy | Minutes for page timings. The Agent starts when an anomaly alert fires |
| Compares one release to the lastAutomatically, without being asked a question. | Yes — every finding is one release against the one before | Partly — you can view timings per deployment |
| Rows per call, queries per renderThe shape of what your database work returns, not how long it took. | Yes, this is the core signal | No — the database is not in scope |
| Page vitals per routeLargest paint, interaction response, layout shift. | Yes, broken down by country | Yes — Speed Insights is the strongest part of it |
| Failures that report successEmpty results, refused requests, buttons wired to nothing. | Yes — this is most of what it finds | No — an anomaly alert needs something anomalous in the logs first |
| Names the change that caused itThe pull request in that deploy, not just the deploy. | Yes — the pull request in that deploy that touched the file the finding runs in | It knows the deployment and the commit. Not which change did it |
| What your coding agent is handedThey all have an MCP server now. This row is what comes through it. | The before and after of the shape, the release that changed it, and the stack frames — unprompted, over MCP | Vercel Agent: a root-cause summary from logs and metrics, and patches sandbox-validated on the PR |
| Data collected about your usersWhat ends up on somebody else’s server because you installed it. | None. No IDs, no cookies, no URLs. Session replay is off by default; switched on, every word is masked in the browser before it is sent | Speed Insights is anonymised; Web Analytics counts visitors |
| Infrastructure, logs, containersHosts, pods, queues — the layer under the application. | No | Your Vercel functions only |
| Runtimes it measuresServer-side. Browser coverage is separate and mostly universal. | Node, Python, Go, Ruby and PHP, on Postgres, MySQL or MongoDB. Existing OpenTelemetry collectors add traces and metrics from any OTEL runtime; native agents remain higher fidelity. Any front end, any backend language | Anything you deploy to Vercel |
| Where the bill startsList price for a comparable product, read August 2026. | €14.99 a month, flat | $10 / project / month, then usage |
Which one to pick
Pick Vercel when
- All you want is Core Web Vitals for pages you deploy on Vercel.
- You would rather not add anything: it is a toggle in a dashboard you already use.
- You want AI code review on pull requests in the same place you deploy.
- Your app has no database of its own, or nothing behind it worth measuring.
Pick Sixty when
- Your slow page is slow because of what the query behind it returns.
- You want the browser and the database explained by the same finding.
- You deploy somewhere other than Vercel, or in more than one place.
- You want the cause named against a deploy, not an investigation that starts when something spikes.
These are not mutually exclusive and the honest answer is often both. Nothing here refuses to run alongside Vercel, and a lot of people keep it.
Questions people actually ask
Does Sixty replace Speed Insights?
For page timings it measures the same things — largest paint, interaction response, layout shift, per route — and adds a country breakdown, so a page that is only slow in Brazil reads as a network problem instead of a mystery. What makes it a replacement rather than a duplicate is that the same finding continues down into the query that caused it.
Vercel Agent investigates production. Is that not the same idea?
The same ambition, from the opposite end. The Agent is triggered by an anomaly and works backwards through logs and metrics to explain it, which is a good way to handle a spike you can see. Sixty has no trigger, because the failures it exists for do not produce one: it holds a baseline for every operation and compares each release against the last, so the finding exists before anything has looked wrong to anybody.
Does Sixty work outside Vercel?
Yes. The release marker is picked up automatically from Vercel, Render, Railway, Fly and GitHub Actions, and the browser agent needs no server at all — it works with any backend in any language, including apps with no backend of their own.
The other comparisons
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.
Product analytics, with error trackingSixty vs PostHog
Probably already in your app, and probably costing you nothing. It watches the funnel and the crash — not the query underneath either of them.
Full-stack observability platformSixty 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.
OpenTelemetry-native observability and AI SRESixty vs Dash0
A complete OTEL-native home for traces, metrics, logs and infrastructure, with Agent0 investigating and fixing incidents. Sixty is the narrower release detector.
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.