Highlight
Understand and debug customer issues with confidence
Highlight launched on August 4, 2022 with 285 votes, #63 of 3,307 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 4 years on.
In plain words
Highlight is a developer tool that helps teams understand and debug customer issues by combining session replay, error stack tracing, and console visibility. It targets developers and engineering teams who need to quickly identify and resolve problems affecting their users. The platform consolidates multiple debugging perspectives in one place, eliminating the need to piece together information from various sources when investigating customer-reported problems.
written from the facts on this page · September 2026
From the sources
Highlight makes it easy to understand and debug customer issues. With session replay, error stack tracing, and user console visibility, Highlight removes the mystery of debugging.
LaunchDarkly helps teams safely manage code and AI agents in production with feature flags, progressive delivery, automated rollback, and runtime control.
The runtime control layer for AI development, de-risking releases, and enabling systems that heal and optimize themselves. Progressively release changes and roll back instantly based on real-time impact. Automatically keep agents on track, mitigating bad behavior and steering responses in real time. Test prompts and models in production and dynamically route traffic to the best option. Instantly remediate failing code and misbehaving agents (without human intervention). Experiment with code and agents in production and optimize based on real-world results. Ship confidently with automatic recovery and continuous improvement built in. See end-to-end examples of building on the LaunchDarkly…from launchdarkly.com
Does a similar job
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Highlight – Debug customer-facing issues with replay2022 · highlight.io · ▲21Hey HN, I’m Jay, a co-founder at Highlight and a YC alum; excited to share our replay-based debugging tool! TLDR; if you're using a tool like Fullstory for debugging, or you have trouble understanding the actual impact of your errors (e.g. in sentry), you should give us a try! We built Highlight because we constantly found ourselves flooded with errors and support tickets with very little context on why these issues occurred. To make matters worse, there was never an easy (and less annoying way) of reproducing these errors, other than by asking users to send screenshots, videos, etc.…
We’re open-sourcing our session replay tool2023 · github.com · ▲408Hey 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…
An open source performance monitoring tool2024 · github.com · ▲135Hey 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…
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