The PostHog alternative that shows you what to fix

• Know which recording to open. Sequential ranks new sessions. Evidence puts sessions that broke for the person first, then sessions where the person struggled, then the rest.
• Answers in each replay. In each judged replay, the judge's reading tells you what the person came to do, how the session ended and where they struggled. Click a moment, and the replay goes to that moment.
• Problems counted exactly. Cases come from fixed rules over your events and replays. Sequential groups the same problem across sessions and counts exactly how many people hit it, every 15 minutes by default.
• Measure your release. Record the release and name the case that it fixes. Sequential then counts the same problem before and after that release. It states what changed, for example Improved or Fixed.
• Keep your PostHog tracking calls. Change the key and the host in the posthog.init call. Your capture, identify and autocapture calls stay as they are.
• Your coding agent gets the evidence. Connect Claude Code, Cursor, Codex or another MCP client. Ask in plain words, and your agent gets the problem, how many people had it and the replays.

The PostHog install guide says what each part of posthog-js does when it sends to Sequential. Read it before you switch.

1. 01

   Change two values

   In the posthog.init call you already have, the project token becomes your Sequential PostHog ingest key, and api_host becomes the Sequential API URL. Remove a ui_host if you set one.

2. 02

   Add the recorder line

   For web replay, add the recorder line after the SDK on every page that you want to replay. The recorder reads PostHog's session id when the PostHog SDK is on window.posthog, so your PostHog events show under the replay, in time order.

3. 03

   Check that events arrive

   Your project's Setup page shows a PostHog line with "receiving" when the first event arrives. Events usually show within about a minute.

posthog.init('YOUR_POSTHOG_INGEST_KEY', { api_host: 'https://YOUR_SEQUENTIAL_API_HOST' });
<script src="https://YOUR_SEQUENTIAL_API_HOST/rec/recorder.js/YOUR_REPLAY_INGEST_KEY"></script>

Your coding agent can do the install. Copy one prompt into your coding agent. It adds Sequential to the analytics you already run, runs your build and tests, and lists every file it changed. You read the diff.

• Ask. Type one plain sentence, for example "tried to pay and was blocked by a payment error". Sequential lists the sessions that likely show it, strongest first.
• Fix briefs. Every case comes with a fix brief: what users hit, where, the evidence, since when, and how Sequential checks the fix after the release.
• Release check. The case shows both rates, for example "Before 2026.10.09: 123 of 300 (41%) sessions hit it. After: 10 of 82 (12.2%)." Session counts are exact.
• Calibration. Your team marks each of the judge's readings Right or Wrong. After at least 20 checks on a question's current wording, "How often people agree with the judge" shows if its answers are right as often as the judge says, on your own sessions.
• Changes. Changes is a timeline of what your company changed: releases, product changes, prices, campaigns and incidents. Sequential shows what happened near a change.
• Backend SDK for Node. @usesequential/node sends events from your server. Sequential puts them on the same person as the browser events, and a server error opens a case at its first occurrence.

Sequential is not affiliated with PostHog. PostHog is a trademark of its owner. Facts about PostHog come from its public pages, checked on 2026-10-22.