Skylight
Skylight is a cloud-based profiler for Ruby and Rails applications that helps teams identify performance issues.
What Skylight is
Skylight is a cloud-based profiler for Ruby and Rails applications that helps teams identify performance issues. It ranks endpoints by “agony,” combining popularity with response time, and plots deployments alongside performance so teams can see how code changes relate to app behavior. It supports Rails, Sinatra, and Grape, as well as background-job analysis for Sidekiq, DelayedJob, and ActiveJob. Diagnostics can flag allocation hogs and repeated queries. Endpoint timelines show aggregated, sanitized SQL queries, while GraphQL queries are grouped by name in the dashboard and endpoint event sequences. A weekly report highlights improved endpoints, slowdown warnings, and endpoints that have declined over six weeks. Every account includes 100,000 free traces per month. The signup offer is a free month with no credit card required. Open-source apps can apply for free public performance reporting, with setup instructions sent after approval. The listed platforms are API, Linux, macOS, and web. Skylight says communications are encrypted and access to customer information on secure servers is limited to selected personnel and contractors.
Good
- Includes 100,000 free traces per month per account.
- Ranks endpoints using popularity and response time.
- Analyzes Sidekiq, DelayedJob, and ActiveJob queues.
- Offers a free month without a credit card.
Watch out
- Real user monitoring is not offered.
- Free public reporting for open-source apps requires approval.
Who it suits
Skylight suits teams maintaining Ruby applications that want endpoint, query, deployment, or background-job performance insight. Open-source app maintainers may apply for public performance reporting.
Verdict
Skylight focuses on Ruby application profiling, with endpoint rankings, diagnostics, and trace-based pricing. The free allowance and trial provide ways to start, while paid costs scale with monthly trace volume.
Plans and prices
From Skylight's own pricing page, checked 10 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free allowance | Free | 100,000 monthly traces · 100,000 free traces per month for every account |
| Paid tiers | $20 a month | Tiers automatically adjust to monthly trace volume · Starting at $20 per month; billing is based on monthly traces across all apps |
| Volume pricing | Priced on request | More coverage; contact for pricing information · Email [email protected] for volume pricing |
The facts
Each one read from Skylight's own pages, with the date it was checked.
What it does
- Background jobs
- Skylight supports performance analysis for Sidekiq, DelayedJob, and ActiveJob queues.checked 10 Oct 2026
- Deploy tracking
- Skylight plots deploys on a graph to show how code changes affect performance.checked 10 Oct 2026
- Diagnostics
- Skylight can flag allocation hogs and repeated queries that may slow an app.checked 10 Oct 2026
- Endpoint prioritization
- Skylight ranks endpoints by “agony,” a combination of popularity and response time.checked 10 Oct 2026
- Frameworks
- Skylight supports Ruby frameworks including Rails, Sinatra, and Grape.checked 10 Oct 2026
- GraphQL
- Skylight aggregates GraphQL queries by name in its dashboard and endpoint event sequences.checked 10 Oct 2026
- Open source
- Open-source apps can apply for free public performance reporting, and setup instructions are sent after approval.checked 10 Oct 2026
- Privacy and security
- The privacy statement says communications with Skylight are encrypted and access to customer information on secure servers is limited to selected personnel and contractors.checked 10 Oct 2026
- Product
- Skylight is a smart profiler for Ruby and Rails applications that turns performance data into actionable insights.checked 10 Oct 2026
- Query analysis
- The endpoint timeline provides aggregated, sanitized SQL queries for troubleshooting.checked 10 Oct 2026
- Support
- Skylight provides documentation for setup, instrumentation, performance tips, background jobs, and troubleshooting, and directs users with further questions to contact support.checked 10 Oct 2026
- Trends
- Skylight provides a weekly performance report with improved endpoints, slowdown warnings, and endpoints that have declined over six weeks.checked 10 Oct 2026
Money
- Trial
- The signup page offers a free month, and the pricing page says no credit card is required to try Skylight.checked 10 Oct 2026
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