Open Source Session Replay: Self-Hosted Tools and Deployment Guide

Open Source Session Replay is a self-hosted technology that records and reconstructs user interactions on websites or web applications. It helps product, engineering, and UX teams to gain full control over user data and identify usability issues, debug errors, and improve the user journey.

It has often been discovered that the biggest usability issues were not reported by users at all. This is because they were often hidden inside hundreds of browsing sessions until session replay revealed them. After analyzing those recordings, better solutions for improving the website have been proposed.

This guide is written for beginners as well as developers and product teams. By the end of this article, you'll understand: What session replay actually is, why open source solutions are becoming popular, how self-hosting improves privacy and security, which tools are great in 2026, and how analytics platforms like Eyenaz become even more powerful when combined with session recordings.

In simple words, open-source session replay can record visitors interacting with your website so you can replay their experience later. It is like a security camera, but instead of recording people, it records interactions inside your website.

A session replay may capture:

• Mouse movements

• Clicks

• Scrolling behavior

• Page navigation

• Form interactions

• JavaScript errors

• Network requests (depending on the platform)

• Performance issues

Unlike traditional analytics that give you many numbers and charts, session replay helps you understand the reasons behind the actions of your website users.

For example, Google Analytics may tell you that 45% of your users leave your checkout page, but session replay shows you what happened before they leave your site. Maybe a button wasn't working well, a form validation had problems, a page loaded too slowly, or the users couldn't find the next step. For this reason, session replay has become an essential part of modern UX analytics.

One of the main reasons is the control it gives you over your data, but there are also other benefits like reduced long-term costs and the ability to customize. Many commercial session replay platforms often keep customer recordings on their own cloud infrastructure.

For organizations that work with sensitive data, this raises important questions about:

• GDPR compliance

• Data residency

• Customer privacy

• Security audits

• Vendor lock-in

Organizations can use open source solutions to host their recordings directly on their own infrastructure.

This means:

• Your data stays inside your servers.

• You decide retention policies.

• You control masking rules.

• You choose deployment architecture.

This level of control is important for startups, enterprises, and government organizations.

Self-hosted refers to the setup where you install and operate the software on infrastructure that you own or control. This means you don’t have to rely on another company’s servers, and your recordings are kept safe within your own environment.

Common deployment options include:

• Docker

• Kubernetes

• AWS

• Google Cloud

• Azure

• DigitalOcean

• On-premise servers

These days, a lot of open-source replay platforms have officially supported these deployment methods, which really simplifies the installation process compared to a few years ago.

In most cases, session replay doesn’t record videos as you might think. It tracks browser events and reconstructs the experience after that. This makes recordings smaller, faster, searchable, and easier to analyze.

Its workflow looks like this:

1. Visitor opens your website.

2. The JavaScript tracker captures DOM events such as clicks, scrolling, form interactions, and mouse movements.

3. Events are securely sent to storage.

4.     Later on, the replay engine will reconstruct the session.

Unlike traditional screen recording, modern session replay solutions use event tracking to reconstruct user interactions more efficiently.

Selecting the best platform depends on your objectives, your technical skills, and the infrastructure you have available. Below, you’ll find a comparison table of the best tools in 2026:

OpenReplay focuses primarily on session replay, while others like rrweb provide the underlying recording engine. Platforms such as PostHog and Matomo combine analytics with replay capabilities, whereas Eyenaz complements session replay by offering web analytics, click heatmaps, and scroll heatmaps for a broader understanding of user behavior.

Eyenaz

Eyenaz is a product analytics platform that complements session replay by providing additional insights through web analytics, click heatmaps, and scroll heatmaps. Many beginners often assume that all analytics platforms automatically track user sessions.

With Eyenaz, you can analyze:

• Click Heatmaps

• Scroll Heatmaps

• User click distribution

• Page engagement

• Visitor behavior trends

• Website analytics

Imagine that only 18% of your visitors reach the bottom of a landing page. A scroll heatmap inside Eyenaz can show you where they lose their attention. If you combine that with Session Replay, now you can find out why they stopped.

Maybe they:

• Became confused

• Couldn't find the CTA

• Faced a layout issue

• Waited for a page that didn’t load

This combination provides deeper behavioral insights than using analytics or session replay separately. A workflow looks like this:

1. Analyze traffic with Eyenaz

2. Find pages with poor engagement

3. Open Session Replay for affected users

4. Watch real interactions

5. Improve UX

6. Measure improvements again using Eyenaz

OpenReplay

OpenReplay is one of the best open-source session replay tools. It focuses on session replay and also offers developer-oriented debugging features.

Advantages

• Fully open source

• Self-hosted

• Excellent DevTools integration

• Network monitoring

• Console logs

• Co-browsing

• Privacy controls

Disadvantages

• Infrastructure is larger than lightweight solutions.

• No native heatmaps.

• Analytics capabilities are limited compared to other analytics platforms.

OpenReplay is a great choice for engineering teams that are looking for debugging and user-session investigation.

rrweb

Many popular products use rrweb to implement their replay functionality. Instead of offering pre-built dashboards, storage, and search options, rrweb provides developers with the foundational elements to build custom replay systems from the beginning.

Advantages

• MIT License

• Extremely flexible

• Lightweight

• Large community

• Used across many well-known products

Disadvantages

• Requires development effort

• No dashboard

• No analytics

• No storage layer

• No UI

If you want to build your own platform, rrweb is often the best choice for a strong foundation. However, most teams prefer to use ready-made solutions instead.

PostHog

PostHog combines product analytics with session replay in one platform, and it’s very useful for startups that are using PostHog for feature flags, funnels, and product analytics.

Advantages

• Product analytics

• Feature flags

• Funnels

• A/B testing

• Session replay

Disadvantages

• Production self-hosted replay has more deployment limitations than before.

• Larger infrastructure footprint.

• Can become complex for smaller teams.

Highlight.io

Highlight.io is another tool that combines session replay with features such as error monitoring, logs, and tracing. It is a great platform for engineering teams that need more than just user recordings, because it connects technical issues to the experiences of users. When a JavaScript error happens, developers can move from the error log to the specific user session that caused it.

Advantages

• Open source (Apache 2.0)

• Session replay

• Error monitoring

• Logging

• Distributed tracing

• Strong developer experience

Disadvantages

• Smaller community than OpenReplay and PostHog

• Development activity has slowed following its acquisition

• Best for technical teams rather than marketers

If debugging production applications is your top priority, Highlight.io is great for you. However, it's also important for organizations to check the long-term plans of the project before using it.

Matomo

Matomo is popular because of its privacy-first analytics platform. You can access session replay through its premium plugins. Many organizations that are using Matomo love this tool’s privacy because all their data remains on their own servers.

Advantages

• Privacy-first analytics

• Excellent GDPR support

• Self-hosted

• Built-in web analytics

• Heatmaps available

• Large ecosystem

Disadvantages

• Session Replay is not included in the free core product.

• Replay requires a paid plugin.

• PHP/MySQL deployment is heavier than some modern alternatives.

If analytics is already a key part of your workflow and you really value privacy, Matomo is a good option to consider.

Temps

Temps is another self-hosted observability platform that combines session replay, analytics, error tracking, and uptime monitoring in one platform.

Advantages

• All-in-one observability platform

• Session Replay built-in

• Web Analytics

• Error Tracking

• Uptime Monitoring

• Lightweight deployment

• No per-session or per-MAU pricing for self-hosting

• Data remains on your own infrastructure

Disadvantages

• Smaller community compared to more established projects

• Fewer third-party integrations than larger ecosystems

• Best suited for engineering-focused teams

Temps is a strong choice for teams that want to simplify their observability stack, keep complete ownership of their data, and avoid recurring SaaS costs.

FullStory

FullStory provides AI-enhanced behavioral insights via a fully managed SaaS solution. It's good for organizations that prefer a ready-to-use platform. FullStory also features advanced behavioral analytics, heatmaps, and AI-driven frustration detection, which makes it easier for teams to discover usability problems.

Advantages

• Very easy to implement

• Powerful Session Replay

• AI-powered insights

• Heatmaps

• Frustration and Rage Click Detection

• Enterprise-ready experience

• No infrastructure management required

Disadvantages

• No self-hosted deployment option

• Data is stored on the vendor's cloud infrastructure

• Usage-based pricing can become expensive as traffic grows

• Less flexibility than open-source alternatives

Setting up an open-source session replay platform is not that hard today, especially with the templates modern tools offer. Although each project has its specific installation process, the overall workflow is the same:

Most platforms provide a lightweight JavaScript SDK that can be installed with a simple script tag or through package managers such as npm, depending on your application's architecture.

There isn't a best tool for everyone; the right choice depends on your goals. If you want:

1.     The best dedicated open-source replay: OpenReplay

2.     Build your own replay platform: rrweb

3.     Product analytics + replay: PostHog

4.     Privacy-focused analytics: Matomo

5.     Replay + Observability: Highlight.io

6.     Analytics + Heatmaps alongside Session Replay: Eyenaz

When it comes to session replay, it's important to use it wisely, particularly when dealing with personal data. Before you start recording, pay attention to these recommendations:

• Mask passwords and sensitive inputs.

• Avoid recording payment information.

• Respect user consent requirements where applicable.

• Configure data retention policies.

• Limit access to recordings.

• Review recordings only when necessary.

• Document your privacy practices clearly.

Privacy should be designed into your implementation from the beginning, not later.

Open source session replay helps teams better understand user behavior; it’s useful for:

·        SaaS companies: Improve onboarding and retention.

·        eCommerce businesses: Optimize conversions.

·        Product & UX teams: Enhance user experience.

·        Developers: Debug issues faster.

·        Privacy-focused organizations: Keep data in-house.

Conclusion

Open source session replay has become an essential tool for understanding real user behavior. By replaying user sessions, teams can identify usability issues, troubleshoot bugs, optimize conversions, and make data-driven decisions. For organizations that value privacy and data ownership, self-hosted solutions also provide more control.

The most effective optimization strategy is to use analytics and session replay together. While session replay explains what users experienced, Eyenaz provides the broader behavioral context through web analytics, click heatmaps, and scroll heatmaps. Together, they enable product, engineering, and marketing teams to make better decisions to improve the user experience.

FAQs

1.     What is Open Source Session Replay?

Open Source Session Replay is software that records and reconstructs users' interaction with a website, while allowing organizations to self-host the source code.

2.     Is Session Replay the same as screen recording?

No, because most modern session replay platforms do not record videos. Instead, they capture browser events and reconstruct the user's experience.

3.     Why do companies choose self-hosted solutions?

The main reasons are better data privacy, full data ownership, regulatory compliance, better customization, and reduced long-term SaaS costs.

4.     Which session replay tool is best for beginners?

If your primary goal is session replay, OpenReplay is one of the easiest open-source platforms for beginners. If you want to understand overall visitor behavior via analytics, click heatmaps, and scroll heatmaps, Eyenaz is an excellent companion platform.

5.     Does Eyenaz replace Session Replay?

No, Eyenaz complements Session Replay; it means that it can help teams understand user behavior via behavioral analytics, click heatmaps, and scroll heatmaps.