Open-source Hotjar alternatives

PostHog is an open-source platform that bundles the tools product teams use to understand and improve what they ship. It captures event data, user sessions and errors in one place, and its newer self-driving mode aims to turn signals such as errors, rage clicks and failed queries into researched reports and pull requests that engineers review and merge.

The product suite includes product analytics with autocapture or manual instrumentation and SQL analysis, web analytics with a dashboard resembling Google Analytics, session replays for web and mobile, feature flags, experiments with statistical measurement, surveys, error tracking, logs, a data warehouse and a customer data platform. The back end is Python and the front end is React and TypeScript.

PostHog's repository license is listed as 'Other' on GitHub, so check which parts are open source and which are enterprise-only. It can be self-hosted, and the company also runs a managed cloud service. It suits product and engineering teams that prefer a single tool over separate analytics, flagging and replay vendors.

OpenReplay is an open-source experience platform that you host on your own infrastructure. It combines session replay, DevTools-level debugging context, product analytics and live cobrowsing, so teams can see how real users navigate, where they struggle and what errors they hit without sending sessions to a third party.

Because everything stays in your own cloud, it is pitched at teams that cannot hand customer data to an external vendor. Data can be masked, obscured or skipped at capture time before it reaches your servers, and a private mode redacts everything by default. A lightweight tracker sends data asynchronously to limit the impact on page performance, and SDKs cover frameworks such as React, Angular, Vue, Svelte, Next.js and React Native.

The README states it can be self-hosted for free on AWS, GCP, Azure and other platforms. The repository lists its licence as Other and its topics also reference feature flags, web vitals and real-user monitoring, so it spans debugging, product and support use cases.

Clarity is a behavioral analytics library written in TypeScript with two main goals: privacy and performance. It watches DOM mutations and user interactions in the browser to generate aggregated insights about how visitors view and use a website, across modern devices and browsers. It is released under the MIT license.

The data it captures supports session replay and heatmaps, which help product and design teams see where features succeed or fail. The README says the same code powers Microsoft's hosted behavioral analytics service at clarity.microsoft.com, where a live demo is also available, so the repository represents the client-side collection library rather than a full self-contained analytics backend.

The community is invited to help build a privacy-first, high-performance behavioral analytics library. It suits web teams who want to understand user behavior, improve conversion and retention, and review the code that runs on their pages before adding it to a site.

Talivia is an analytics platform that ties website traffic to revenue. This repository holds the focused open-source edition of the product at talivia.com: a self-hosted version that combines core web analytics, session replay, website collaborators, shared analytics, import and export, and customer revenue from Stripe, LemonSqueezy, Polar, Dodo, Yolfi, or a manual payment API. It is released under the MIT license and positions itself as an alternative to Datafast.

The open-source edition is a subset of the complete product. Talivia Cloud offers managed hosting and extra integrations, including Google Search Console, Bing Webmaster Tools, GitHub activity, and social mentions from X, Reddit, TikTok, and others. Documentation covers product and integration guides.

It is written in TypeScript and was created in 2026, so it is a young project that reached version 1.0.0. Talivia suits founders and small SaaS teams who want to see which traffic sources and pages lead to paying customers, while keeping analytics data on their own infrastructure.

Fusion is a self-hostable, open-source platform for analyzing how people use web products and for engaging with them. It is described as an alternative to Mixpanel, Amplitude, Hotjar and Fullstory. The README states that the project is no longer maintained, so it is better treated as a reference or starting point rather than a supported product.

It combines a low-code analytics engine with visual analytics. Events such as page views, button clicks and form submissions are captured automatically once a tracking snippet is added, and visual recordings of user interactions are supported. Custom dashboards allow different chart types and timescales. For engagement, it offers live chat, in-app push notifications, email and micro-surveys, and email campaigns that can be triggered automatically.

Fusion is meant to be self-hosted, with the README providing Docker-based commands for production and development, and its pitch is avoiding large SaaS bills while keeping user data in your own hands. The stack includes JavaScript, Python and PostgreSQL. The repository lists its licence as other, so terms should be read before reuse.