An open source performance monitoring tool
Hey HN. We’re Jay and Vadim from Highlight.io (https://highlight.io). We’re building an open source [1] monitoring platform for web applications. Today we’re excited to be sharing a performance tool we’ve been working on, which helps you inspect the latency of code execution from the client to the server. As engineers at past startups, we often had to debug slow queries, poor load times, inconsistent errors, etc... While tools like Jaegar [2] helped us inspect server-side performance, we had no way to tie user events to the traces we were inspecting. In other words, although we had…
An open source performance monitoring tool launched on February 1, 2024 with 135 votes, #367 of 3,962 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 2 years on.
In plain words
Highlight.io is an open source monitoring platform for web applications that traces code execution latency from client to server. Built by engineers who struggled debugging slow queries and performance issues, it connects user events to server traces to identify bottlenecks across the full stack. Unlike traditional tools that only show server-side performance, it bridges visibility between frontend and backend, helping developers pinpoint where applications actually slow down.
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/README.md at 3cc29388f99716833055d1aaa4a53d938d9e786e · highlight/highlight
In the maker’s words, at launch
Hey HN. We’re Jay and Vadim from Highlight.io (https://highlight.io). We’re building an open source [1] monitoring platform for web applications. Today we’re excited to be sharing a performance tool we’ve been working on, which helps you inspect the latency of code execution from the client to the server.…
Does a similar job
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