We’re open-sourcing our session replay tool
Hey HN! We’re open-sourcing highlight.io (https://github.com/highlight/highlight), a session replay and error monitoring tool. Highlight.io gives you a high-precision video-like replay of what users are doing when an error or exception occurs in your web app, along with a full-fledged error monitoring experience (similar to bugsnag, rollbar, etc..). The main value prop of highlight.io is that we help you understand the full context surrounding an error and allow you to drill down to the code path that a user invoked (i.e user clicked button X, sent network request Y, and…
We’re open-sourcing our session replay tool launched on February 22, 2023 with 408 votes, #42 of 3,829 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
Highlight.io is an open-source session replay and error monitoring tool for web applications. It records video-like replays of user interactions at the moment errors occur, combined with error tracking similar to Bugsnag or Rollbar. The tool lets developers see the complete context of failures, including user actions, network requests, and backend code execution paths. It's designed for web developers who need to understand and debug complex issues that span frontend and backend systems.
written from the facts on this page · September 2026
From the sources
highlight.io: The open source, full-stack monitoring platform. Error monitoring, session replay, logging, distributed tracing, and more. - highlight/highlight
In the maker’s words, at launch
Hey HN! We’re open-sourcing highlight.io (https://github.com/highlight/highlight), a session replay and error monitoring tool. Highlight.io gives you a high-precision video-like replay of what users are doing when an error or exception occurs in your web app, along with a full-fledged error…
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Source: Show HN post ↗ · launch text quoted in part
