Highlight.io

Highlight.io is an open-source, full-stack monitoring platform combining session replay, error tracking, logging and feature flags with AI-powered insights.

Overview

Highlight gives developers everything needed to understand what happens in production: session replay showing exactly what users did, error monitoring with full stack traces, log management and distributed tracing — all open source and self-hostable. Its AI features summarize errors, suggest fixes and surface anomalies across the telemetry data.

Because it is open source, teams can inspect, extend and host Highlight themselves, avoiding vendor lock-in and data sovereignty issues. Modern features like feature flags, AI agent monitoring and product analytics round out a platform aimed at small teams that want big-company observability affordably.

Highlight’s stack covers session replay, error monitoring, logging, tracing, feature flags and product analytics — all open source and self-hostable. Developers replay user sessions with full technical context, and AI summarizes errors and logs to accelerate diagnosis. Modern workloads are covered too, including monitoring for AI agents and LLM features. SDKs support major web, mobile and backend frameworks.

Key Features

• Session replay with console, network and error context
• Error tracking and distributed tracing
• Log management with AI summarization and search
• Feature flags and product analytics
• Open source with self-hosting options
• AI agent monitoring for LLM-powered apps

Pricing

Highlight offers a free tier with usage limits, usage-based paid plans, and a free open-source version for self-hosting.

Who Is It For

Startups and engineering teams that want full-stack visibility with the flexibility and economics of open source.

FAQ

Is Highlight.io free to use?

Yes — free tier in the cloud, and the entire platform is free when self-hosted.

Does Highlight.io offer an API?

Yes — Highlight exposes APIs and SDKs for errors, logs, traces and session data.

How does Highlight.io compare to alternatives?

Open source plus an integrated session replay/observability suite beats assembling separate closed tools.

Can Highlight.io be self-hosted?

Yes — Highlight is open source and can be self-hosted entirely, in addition to its managed cloud offering.

What are the main use cases of Highlight.io?

Highlight.io is used by teams that want to understand production behavior without assembling multiple vendors. Developers replay user sessions to reproduce bugs, monitor errors with full stack traces, and search logs with AI assistance. Product managers use the analytics and replay to see how features are used. Feature flags let teams ship safely, and monitoring for AI agents covers LLM-powered features. Startups favor it for its generous free tier and open-source option, while enterprises value self-hosting and data control.