Open-source Heatmap.com 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.

OpenPanel is a web and product analytics platform, released as open source, that sets out to combine the depth of Mixpanel with the simplicity of Plausible. It is presented as an alternative to Mixpanel and Google Analytics, with optional self-hosting and cookieless tracking by default.

Its feature list covers funnels and cohorts, user profiles with session history, session replay that has privacy controls, real-time dashboards, built-in A/B testing, event and funnel alerts, custom dashboards, revenue tracking for purchases, subscriptions and lifetime value, SDKs and an API for web, mobile and server-side tracking, integrations such as Google Search Console, and an MCP server so AI clients can query user data. A comparison table in the README sets it against Mixpanel, GA4 and Plausible.

OpenPanel is written in TypeScript and licensed under AGPL-3.0. It can be self-hosted for full control of data, and a hosted version with sign-in is also available. The project emphasizes transparent pricing with no hidden costs or usage limits. It suits product teams that want privacy-friendly analytics with product-level depth.

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.

Swetrix is an open-source web analytics platform presented as a privacy-respecting alternative to Google Analytics. It is cookieless and designed to comply with GDPR without consent banners, with anonymized data and no cross-device tracking, and it has been developed in the open since 2021.

Beyond traffic statistics such as top pages, locations, devices, traffic sources and UTM campaigns, it offers custom events and properties, sessions and user flows, funnels, real-user performance metrics, client-side error tracking and session replays. The README says some features, such as network intelligence and session replays, are available on the cloud service. A lightweight tracking script feeds a real-time dashboard.

Swetrix is built with TypeScript, NestJS, Redis, MySQL and ClickHouse and is licensed under AGPL-3.0. You can try it on Swetrix Cloud, which is free to start, or self-host it with Docker. A live demo and documentation are available. It suits website owners and product teams who want analytics, error tracking and performance data in one privacy-focused tool.