highlight.io

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

Y CombinatorWinter 2023AcquiredB2BEngineering, Product and DesignDeveloper ToolsSaaSB2BOpen Source

What they do

Problem

Developers lack clear visibility into what is slowing down users and causing errors in web applications, making bugs hard to reproduce and fix.

Solution

highlight.io is an open-source, full-stack monitoring and observability platform that captures session replays and error/performance data to diagnose and prevent issues.

Who it's for

Software developers and engineering teams building and operating web applications.

Founders

Jay Khatri

Cofounder, CEO (acquired by LaunchDarkly)

I currently run the Observability business at LaunchDarkly. I was the CEO at Highlight, which was acquired by LaunchDarkly in March of 2025.

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Vadim Korolik

Founder

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.

LinkedIn · X