Highlight
The business, the turning points, and the decisions behind them.
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Sections to complete：02 · 05
01 / WHAT IT BUILT
What the company did
Highlight was a San Francisco developer-tools startup from Y Combinator's Winter 2023 batch, co-founded by CEO Jay Khatri and Vadim Korolik. It built an open-source, full-stack observability platform: front-end session replay, full-stack error monitoring and logging combined in one product so engineers could see both user-side and back-end issues together. It publicly launched in August 2023 with an $8 million seed round led by Afore Capital and Craft Ventures.
02 / FAILURE REASONS
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03 / EVENT HISTORY
Events in the structured record
- Launch and seed round
Highlight publicly launched its open-source monitoring platform and closed an $8 million seed round led by Afore Capital and Craft Ventures, with participation from Y Combinator (W23), Neo, Day One Ventures, Worklife Ventures and Fuel Capital.
- Acquired by LaunchDarkly
LaunchDarkly acquired Highlight in April 2025; co-founders Jay Khatri and Vadim Korolik and the team joined LaunchDarkly to build out its observability offering. The standalone Highlight.io service was retired on February 28, 2026.
04 / CONTEMPORARY REBUILD ASSESSMENT
Difficulty of rebuilding this project today
Material for this section is being gathered and checked. It will appear here once ready.
Overall assessment: Not completed
05 / CAUSAL CHAIN / AFTERMATH
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