The open source, fullstack monitoring platform: stop guessing why…

highlight.io is the open source, full-stack monitoring platform. With just a few lines of code, Highlight makes it easy to understand what's slowing down your users and swiftly address errors and regressions on your web app. Imagine that you have a customer reporting an issue on your web app. With highlight.io, you can playback their exact interactions to reproduce the bug and get notified of any future errors that could happen. That being said, we’re just getting started! We have plans to go way deeper into your observability stack to give you all of the visibility you need. Join us on this journey: - Star us on GitHub (https://github.com/highlight/highlight) to keep up with releases and news. - Join our Discord (https://highlight.io/community) to share product feedback and thoughts.

Team Size:8
Location:Irvine, CA
Group Partner:Jared Friedman

Active Founders

Jay Khatri

Cofounder / CEO @ Highlight (formerly founder @ Reploy, S20)

Vadim Korolik

Vadim Korolik is the founder and CTO of highlight.io, the open source session replay and error monitoring framework. A native of the Bay Area, Vadim previously worked at Pure Storage and drive.ai.

Vadim Korolik
Vadim Korolik

Company Launches


highlight.io is an open-source session replay and error monitoring tool that helps teams reproduce hard-to-crack issues and understand product usage. We enable developers to understand WHY bugs are thrown on their web apps to eliminate the noisy alerts they get from more traditional monitoring tools.

highlight.io is already being used in production by 2k+ developers and 80+ companies. Get started for free at app.highlight.io and give us a ⭐️ at github.com/highlight/highlight.

The Problem

How many times have you gotten an alert from Bugsnag or Sentry, and dismissed it because you weren’t sure about what caused it? And how many of you have an endless backlog of errors that your team should triage, but haven’t gotten to yet?

We’ve found that when debugging an issue or customer request, the toolset that you use is responsible for delivering one thing only: context. And if there’s any gaps in this context, engineers are left in the dark.

To solve this, at our last companies, we found a lot of value in instrumenting a session replay-like tool, (similar to Logrocket or Fullstory), paired with an error monitoring tool (like Bugsnag). In fact, we’ve built these sorts of tools ourselves to hackily solve the problem. Enter highlight.io.

The Solution: Session Replay 🤝 Error Monitoring

With a simple yarn/npm import in your frontend and an optional import in your backend, highlight.io gives you session replay and error monitoring out of the box. This means that you can:

  • Replay exactly what a user was seeing at the time of an issue/bug.
  • Reproduce the browser dev-tools for every user session, including the network requests, errors, and more.
  • Access all of the errors and exceptions (both frontend and backend) thrown in your app, paired with session replay.

Lastly, given the privacy-sensitive nature of the product, we have a very powerful privacy API that you can take a look at in our docs here.

💬 What’s Next?

We’re just getting started! We have plans to go way deeper into your observability stack to give you ALL of the visibility you need; that means logs, traces and more! Join us on this journey: