Highlight

Website: https://highlight.io
Tagline: Open-source full-stack monitoring: errors, replay, logs.
Categories: Observability & Errors, User Experience Monitoring

Overview

Highlight is an open-source monitoring platform built around three signal types: error tracking, session replay, and logs. The pitch is that you install one tool instead of stitching together a separate error tracker, a replay vendor, and a log service — and because all three live in the same place, an error report can be read next to the session that produced it.

One thing to know before evaluating: the highlight.io homepage currently serves LaunchDarkly's marketing site, not Highlight's product page. The page title reads "Runtime Control for AI-Era Software | Feature Flags & AI Agent Control | LaunchDarkly," and the navigation links to LaunchDarkly pages (feature flags, experimentation, agent control). This matches LaunchDarkly's acquisition of Highlight. If you evaluate Highlight today, expect to be routed through LaunchDarkly's site and demo process.

What it does

• Error monitoring — catches and reports application errors (listed under Observability & Errors).
• Session replay — records user sessions so you can see what a user did before a problem occurred (listed under User Experience Monitoring).
• Log management — collects application logs alongside errors and replays.
• Open source — the tagline identifies it as open-source. The current homepage doesn't display repository or license details, so check GitHub if self-hosting matters to you.

Pricing

The scraped homepage doesn't show pricing. Since the site now routes through LaunchDarkly, current pricing would come from LaunchDarkly's site or a demo request.

Alternatives

• Sentry (sentry) — error tracking and performance monitoring for every stack; the closest match if errors are your primary need.
• LogRocket (logrocket) — session replay plus frontend performance and errors; the closest match on the replay side.
• Datadog (datadog) — full-stack observability covering metrics, traces, logs, and RUM; a commercial option if you want logs and monitoring from one vendor.
• Axiom (axiom) — serverless logging and observability; relevant if log volume and cost are the main concern.

FAQ

Is Highlight open source? The tagline describes it as open-source. The current homepage doesn't show repository links or license information (it serves LaunchDarkly's site), so verify the current state of the codebase on GitHub.

Is Highlight free? The homepage doesn't display pricing. Check with LaunchDarkly or request a demo through their site.

What does Highlight monitor? Errors, session replays, and logs — the three signal types named in its tagline, spanning frontend and backend.

Can I self-host Highlight? The homepage doesn't say. Open-source projects can generally be self-hosted, but the current site doesn't confirm what's available — check the GitHub repository.

Who owns Highlight? Highlight was acquired by LaunchDarkly; the highlight.io domain now serves LaunchDarkly's website, and support routes through LaunchDarkly's help center.