Highlight

Highlight is an open-source, full-stack monitoring platform that combines session replay, error tracking, logging and performance monitoring so you can see exactly what is happening — and what went wrong — in your application. Instead of piecing together separate tools, Highlight lets you watch a replay of the user's session, see the errors and logs that occurred, and trace performance issues, all in one place. That end-to-end visibility makes debugging production problems dramatically faster, because you can see the user's actual experience alongside the technical details.

Its strengths are breadth and openness. By unifying session replay with error monitoring, logs and traces, Highlight connects the dots between what a user did and what broke, which is often the hardest part of debugging. Being open source, it is transparent, community-driven and self-hostable, giving teams control over their data — important when monitoring can capture sensitive information. It serves both frontend and backend, so you get a coherent picture across your whole stack rather than fragmented signals from disconnected services.

Highlight is ideal for developers and teams who want comprehensive, full-stack observability — replay, errors, logs and performance — in one open platform, and who value the option to self-host for data control. It sits alongside established monitoring tools but distinguishes itself with session replay and an open-source foundation. If you want to understand and fix issues quickly by actually seeing what your users experienced, with full visibility across frontend and backend, Highlight is a powerful, transparent choice for keeping your application healthy.