Highlight.io was discontinued on February 28, 2026.
Highlight.io
Open-source session replay and errors, hosted service retired
Highlight.io is a uptime & monitoring tool for Developers, offered as open source ($50/mo). Founded in United States in 2021.
About Highlight.io
Highlight.io is an open-source monitoring platform that combines session replay, frontend and backend error monitoring, logging and distributed tracing in one product. It was acquired in 2025 by feature flag vendor LaunchDarkly, which built its own observability product on Highlight's technology. The hosted Highlight.io service was retired at the end of February 2026 and customers were moved to LaunchDarkly Observability; the open-source code remains available for self-hosting.
The core workflow ties a user-facing problem to its root cause: a session replay shows what the user did, and the error that occurred is linked to the backend trace and to the logs emitted during that request. SDKs cover popular frontend frameworks and backend languages, and OpenTelemetry is supported for traces and logs. The code is open source and can still be self-hosted; while it ran, the hosted version offered a free tier with a monthly allowance of sessions, errors and logs and pay-as-you-go pricing above that.
Today Highlight mainly suits teams that want to self-host replay and errors in one tool and can maintain the code themselves, since the project no longer has an official hosted service or vendor roadmap. Teams that want the same approach as a managed product should evaluate LaunchDarkly Observability, especially if they already use LaunchDarkly. Sentry offers deeper error monitoring and its own session replay with a much larger community, LogRocket and PostHog are strong on product-side replay and analytics, and OpenReplay is another self-hostable open-source replay option.
Key features of Highlight.io
- Session replay
- Error monitoring
- Logs
- Traces
- Open source
- Self-hosting
Pros and cons
Pros
- All-in-one full-stack
- Open source
- Self-hostable code still available
- Developer-friendly
Cons
- Hosted service retired in February 2026
- No longer actively developed as Highlight
- Self-hosting effort
- Smaller than Sentry
Highlight.io pricing
Highlight.io uses a open source model.
| Plan | Price | Includes |
|---|---|---|
| Free | $0 | Limited sessions |
| Pay as you go | Usage | Sessions, errors, logs |
How Highlight.io compares in Uptime & monitoring
- Rank by votes
- #1 / 16
- Starting price
- $50
- Free alternatives
- 3
0 votes from members
108% above the category median ($24/mo)
Free or open-source tools in Uptime & monitoring
Highlight.io ranks #1 of 16 uptime & monitoring tools by community votes and is priced above most tools in the category.
Common use cases
- 1Debugging frontend issues with replay
- 2Full-stack error tracing
- 3Startup observability
- 4Self-hosted monitoring
Best for
Teams self-hosting the open-source code.
Not ideal for
Anyone wanting a hosted service; use LaunchDarkly Observability, Sentry or PostHog.
Integrations
- React
- Next.js
- Node
- Python
- Go
- OpenTelemetry
Our take
Highlight's hosted service is gone; former users should move to LaunchDarkly Observability or Sentry.
FAQ
- What is Highlight.io?
- Highlight.io is a Uptime & monitoring tool: Open-source session replay and errors, hosted service retired.
- How much does Highlight.io cost?
- Highlight.io is Open source; there is no mandatory paid plan.
- What does Highlight.io integrate with?
- Highlight.io integrates with React, Next.js, Node, Python, Go, OpenTelemetry and more.
- Which platforms does Highlight.io support?
- Highlight.io is available on web.
- Who is Highlight.io for?
- Teams self-hosting the open-source code.
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