Skylight
What it is
Skylight is a cloud profiler for Ruby and Rails applications that turns runtime performance data into troubleshooting views. It ranks endpoints by “agony,” combining popularity with response time, and plots deployments against performance so teams can inspect changes over time. Background-job analysis covers Sidekiq, DelayedJob, and ActiveJob, while supported Ruby frameworks include Rails, Sinatra, and Grape. Diagnostics can identify allocation-heavy code and repeated queries. Endpoint timelines present aggregated, sanitized SQL queries, and GraphQL requests are grouped by name in the dashboard and event sequences. A weekly report lists improved endpoints, slowdown warnings, and endpoints that have declined over six weeks. Each account includes 100,000 free traces per month. Paid tiers start at $20 per month and adjust to trace volume across applications. A free month is offered without a credit card. Open-source apps may apply for free public performance reporting. Skylight is available through API, Linux, macOS, and web access.
For and against
For
- Ranks endpoints by popularity and response time
- Tracks deployments against performance
- Analyzes Sidekiq, DelayedJob, and ActiveJob
- Includes weekly performance trend reports
- 100,000 free traces monthly
Against
- Real user monitoring is not supported
- Paid tiers adjust with trace volume
- Open-source reporting requires application approval
- Cloud deployment model
The verdict
Skylight focuses on Ruby application performance with endpoint prioritization, deploy context, query diagnostics, and trend reporting. The free trace allowance and trial lower the entry barrier, while paid costs vary with monthly volume.
Who it suits
It suits developers and teams maintaining Ruby or Rails applications and background jobs. Open-source maintainers can also apply for public performance reporting.
Plans and prices
Free allowance
100,000 monthly traces
Read 10 Oct 2026 · skylight.io
Paid tiers
Tiers automatically adjust to monthly trace volume
Read 10 Oct 2026 · skylight.io
Volume pricing
More coverage; contact for pricing information
Read 10 Oct 2026 · skylight.io
On the record
- Background jobs
- Skylight supports performance analysis for Sidekiq, DelayedJob, and ActiveJob queues.skylight.io · read 10 Oct 2026
- Deploy tracking
- Skylight plots deploys on a graph to show how code changes affect performance.skylight.io · read 10 Oct 2026
- Diagnostics
- Skylight can flag allocation hogs and repeated queries that may slow an app.skylight.io · read 10 Oct 2026
- Endpoint prioritization
- Skylight ranks endpoints by “agony,” a combination of popularity and response time.skylight.io · read 10 Oct 2026
- Frameworks
- Skylight supports Ruby frameworks including Rails, Sinatra, and Grape.skylight.io · read 10 Oct 2026
- GraphQL
- Skylight aggregates GraphQL queries by name in its dashboard and endpoint event sequences.skylight.io · read 10 Oct 2026
- Open source
- Open-source apps can apply for free public performance reporting, and setup instructions are sent after approval.skylight.io · read 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.skylight.io · read 10 Oct 2026
- Product
- Skylight is a smart profiler for Ruby and Rails applications that turns performance data into actionable insights.skylight.io · read 10 Oct 2026
- Query analysis
- The endpoint timeline provides aggregated, sanitized SQL queries for troubleshooting.skylight.io · read 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.skylight.io · read 10 Oct 2026
- Trends
- Skylight provides a weekly performance report with improved endpoints, slowdown warnings, and endpoints that have declined over six weeks.skylight.io · read 10 Oct 2026
- Trial
- The signup page offers a free month, and the pricing page says no credit card is required to try Skylight.skylight.io · read 10 Oct 2026
