how sixty compares — Product analytics, with error tracking
Sixty 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.
What PostHog is good at
PostHog has done something nobody else on this page has managed: it made the free tier the actual product rather than a demo. A million events, five thousand session replays and a hundred thousand exceptions every month, with no base fee underneath, is more headroom than most applications will need for their first year — and past it the meter is usage with volume discounts rather than a seat count.
The breadth is real too. Analytics, web analytics, replay, feature flags, experiments, surveys, error tracking, logs, a data warehouse and an AI assistant over all of it, on one bill and one snippet. If the question you have is a product question — who dropped out of the signup, which variant won, what did that user do before they left — this is the tool, and it is open source and self-hostable on top of that.
PostHog costs Free to 1M events, 5k replays and 100k exceptions a month, then usage with no base fee, as published on their pricing page in August 2026. Sixty is €14.99 a month, flat.
What Sixty does differently
It is an analytics product with error tracking attached, and that lineage decides what it can see. Everything in PostHog is an event somebody chose to send: a pageview, a click, a captured exception. That model is perfect for the funnel and it has no opinion at all about the work your server did to answer the request — the query that ran, how many rows came back, how many times it ran. None of that is an event, so none of it is there.
The second thing is that PostHog answers questions and does not ask them. It is the best tool on this page for finding out something you already suspect, and the regression that takes an app down is the one nobody suspected: on the day you built the insight, that query returned thirty rows and looked fine. There is no deploy-over-deploy baseline to trip, because a release is a property you may or may not have sent.
And the privacy trade runs the opposite way from ours by design. Person profiles, IP addresses, device details and session recordings are not a setting PostHog has, they are what PostHog is for — which is exactly why it goes in your consent banner and why some people cannot install it at all. Sixty collects none of it, strips query values and URL paths inside your own process before anything is sent, and correspondingly can never tell you who hit a bug.
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 | PostHog |
|---|---|---|
| What you set upBefore it can tell you anything at all. | Nothing. One command, no dashboards, no thresholds | A snippet, then the insights, dashboards and alerts are yours to define |
| Time to the first findingInstall to a sentence that names a cause. | Your next deploy | Minutes for a crash. Everything else is a question you have to think of |
| Compares one release to the lastAutomatically, without being asked a question. | Yes — every finding is one release against the one before | No — you can break down by a release property if you send one |
| 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 — your database is not in scope |
| Page vitals per routeLargest paint, interaction response, layout shift. | Yes, broken down by country | Yes — web vitals, plus session replay |
| Failures that report successEmpty results, refused requests, buttons wired to nothing. | Yes — this is most of what it finds | Only if you send an event for it yourself |
| 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 | No — it has no connection to your repository |
| 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 | PostHog AI answers questions about your data. Nothing repository-shaped |
| 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 | Person profiles, IP, device, and session replay — this is the product |
| Infrastructure, logs, containersHosts, pods, queues — the layer under the application. | No | No |
| 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 | Everything |
| Where the bill startsList price for a comparable product, read August 2026. | €14.99 a month, flat | Free to 100k exceptions, then usage |
Which one to pick
Pick PostHog when
- Your question is about people — who signed up, who dropped out, which variant won.
- You want feature flags, experiments and surveys without buying three more products.
- The free tier genuinely covers you and you would rather not pay anything.
- You want to own the data, self-host it, or query it as a warehouse.
Pick Sixty when
- What is wrong is on the server, in a query, and nobody thought to send an event about it.
- You want the tool to speak first rather than to be a place where you could have looked.
- You need every finding tied to the deploy that caused it, without instrumenting releases yourself.
- You cannot put another people-tracking script in front of your users.
These are not mutually exclusive and the honest answer is often both. Nothing here refuses to run alongside PostHog, and a lot of people keep it.
Questions people actually ask
Should I run Sixty and PostHog together?
Usually, yes, and they do not overlap much. PostHog tells you what people did and whether the product worked for them; Sixty tells you what your code and your database did and which release changed it. The one thing worth knowing is that they sit on opposite sides of a consent banner — PostHog collects person-level data by design, and Sixty collects none, so the two have very different answers when somebody asks what your site sends about them.
PostHog has error tracking now. Is that not the same thing?
It catches exceptions, which is a real and useful thing, and it is close to free at the volumes most small apps run at. What it shares with every exception tracker is that something has to throw. The failures this product is built around report success — a query that quietly returns thirty thousand rows, a policy that starts filtering everything, a request that comes back 200 and empty — and no exception tracker will ever have a row for those.
Can I just send my own events for slow queries?
You can, and people do, and it works right up until the interesting case. Sending an event requires knowing in advance which operation is worth watching and what counts as too slow — which is the same problem as building a dashboard, moved into your application code. The regression that matters is on the operation you did not instrument, at a threshold you would have set wrong because it was fine when you wrote it.
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.
Platform-native monitoringSixty vs Vercel
Real page timings with one checkbox, and an agent that investigates your logs when something spikes. It stops where your database starts.
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.