Highlight.io vs Checkly
A detailed comparison to help you choose between Highlight.io and Checkly.
Quick Verdict
3.2/5
Highlight.io
0 reviews
4.1/5
Checkly
0 reviews
Checkly is rated higher (4.1 vs 3.2). Open-source full-stack monitoring (session replay, error monitoring, logging, tracing), self-hostable via Docker. Acquired by LaunchDarkly in April 2025; cloud accounts are being migrated to LaunchDarkly Observability. Checkly enables monitoring as code using Playwright for E2E browser checks and HTTP API checks. Define checks alongside your code in TypeScript. Global check locations.
Highlight.io Session replay and error tracking for full-stack debugging | Checkly Monitoring as code with Playwright and API checks | |
|---|---|---|
| Overview | ||
| Rating | 3.2 (0 reviews) | 4.1 (0 reviews)✓ |
| Pricing model | freemium | freemium |
| Starting price | Free tier available | Free tier available |
| Best for | Teams that want open-source, self-hosted session replay plus error, log, and trace monitoring on their own infrastructure — and existing Highlight cloud customers deciding whether to complete the LaunchDarkly migration. | Engineering teams who want to define synthetic and API monitoring tests as code in their repository and run them from global locations |
| Features | ||
| IPv6 | ||
| DDoS protection | ||
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ||
| Tags | ||
| Tags | free tieropen sourceself hostableapi access | free tieropen sourceapi access |
| Visit Highlight.io → | Visit Checkly → | |
Highlight.io
Pros
- + One stack for session replay, errors, logs, and traces with OpenTelemetry-based instrumentation and cross-signal correlation
- + Genuinely usable free tier: 500 monthly sessions and up to 15 seats at $0/month
- + Fully self-hostable from the public repository (Docker hobby stack), keeping session data on your own infrastructure
- + Strong docs for a vendor: architecture notes, self-hosting guides, changelogs, telemetry disclosure
- + Acquired into LaunchDarkly with the founders leading observability there, so the hosted product has a defined continuation path
Cons
- - Standalone product is being absorbed: highlight.io serves LaunchDarkly's site and cloud accounts are being migrated
- - Open-source repository's final community support date is still unannounced, so self-hosters face an uncertain maintenance horizon
- - Thin pricing ladder: nothing between the free tier and $800/month Business, with per-type usage overages and conflicting published quotas
- - No published infrastructure SLA, region map, or uptime record for the hosted product
- - Self-hosting means operating a multi-service stack (database, queue, collectors) with no managed middle tier
Checkly
Pros
- + True monitoring as code: TypeScript + Playwright checks versioned in your repo and deployed via CLI
- + Useful free Hobby tier and clear published plan pricing
- + 22 global check locations plus private locations for internal services on Team+
- + Full check types (HTTP, TCP, DNS, ICMP, SSL/TLS, gRPC, traceroute, heartbeat) with rich alerting and status pages
- + Local test mode in CI catches broken checks before deploy; SOC 2 since 2022
Cons
- - Usage-based billing scales with frequency x locations x checks — overage at $4 per 1,000 runs adds up
- - Developer-only tool: no point-and-click path for non-technical teams
- - Synthetic monitoring only — not a replacement for APM, logs, or metrics platforms
- - No public uptime SLA for the platform itself; best features (1-second checks, parallel scheduling) gated to Enterprise
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