# Glowroot vs Skylight

| Attribute | Glowroot | Skylight |
|---|---|---|
| **vioscaleAI score** | 50.1 (53% (medium)) | 53.9 (49% (low)) |
| activity.commits_last_30d | 10 | - |
| adoption.dependent_repos | 13 | - |
| adoption.github_stars | 1,358 | - |
| content.faq | `[{"answer":"Glowroot is a Java application performance monitoring (APM) tool that captures request traces, provides continuous profiling, response time analysis, and database monitoring with extensive library and framework instrumentation. It is indexed under APM Tools.","source":"https://glowroot.org","question":"What is Glowroot?","confidence":0.6},{"answer":"Glowroot is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://glowroot.org","question":"Is Glowroot free to use?","confidence":0.6},{"answer":"We have confirmed browser-based access to Glowroot. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://glowroot.org","question":"What platforms does Glowroot support?","confidence":0.6},{"answer":"Yes. Glowroot can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://glowroot.org","question":"Can Glowroot be self-hosted?","confidence":0.6},{"answer":"We have confirmed 39 integrations for Glowroot, including Apache Camel, Cassandra, EJB, Elasticsearch, Grails, Hibernate, Apache HttpClient and Apache HttpAsyncClient, plus 31 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://glowroot.org","question":"What does Glowroot integrate with?","confidence":0.6},{"answer":"Yes. Glowroot is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/glowroot/glowroot","question":"Is Glowroot open source?","confidence":0.95}]` | `[{"answer":"An application performance monitoring platform designed for Ruby apps that tracks performance metrics, identifies bottlenecks, profiles code execution, and analyzes database queries to help developers optimize application speed and reliability. It is indexed under APM Tools.","source":"https://www.skylight.io","question":"What is Skylight?","confidence":0.6},{"answer":"Skylight offers a free tier, so you can start without paying. Paid plans start at $20 per month. Pricing changes often, so verify at source before relying on it.","source":"https://www.skylight.io/pricing","question":"Is Skylight free?","confidence":0.6},{"answer":"We have confirmed browser-based access to Skylight. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://www.skylight.io","question":"What platforms does Skylight support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Skylight, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://www.skylight.io","question":"Can Skylight be self-hosted?","confidence":0.6},{"answer":"We have confirmed 9 integrations for Skylight, including Sidekiq, DelayedJob, ActiveJob, Sinatra, Grape, GraphQL, MCP and GitHub, plus 1 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://www.skylight.io","question":"What does Skylight integrate with?","confidence":0.6},{"answer":"We have independently confirmed GDPR for Skylight. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Skylight not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.skylight.io/privacy","question":"What security certifications does Skylight have?","confidence":0.7},{"answer":"Skylight is available worldwide. Its primary market is the United States.","source":"https://www.skylight.io/pricing","question":"Where is Skylight available?","confidence":0.5}]` |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true}` |
| description.long | A lightweight APM solution for Java applications that helps identify performance bottlenecks and understand application behavior with low overhead and straightforward deployment options. | A service that tracks how Ruby applications perform in production, showing developers where their code spends time and what changes affect response speeds, with tools to spot slow endpoints and prevent performance regressions. |
| features.capabilities | `{"hosting":"self","languages":"Java","otel_support":"none","db_monitoring":true,"code_profiling":true,"error_analytics":true,"distributed_tracing":true,"auto_instrumentation":true}` | `{"rum":false,"hosting":"cloud","languages":"Ruby, Rails, Sinatra, Grape","db_monitoring":true,"code_profiling":true,"error_analytics":true,"anomaly_detection":true,"auto_instrumentation":true}` |
| integrations.count | 50 | 7 |
| integrations.list | `[{"name":"Apache Camel"},{"name":"Cassandra"},{"name":"EJB"},{"name":"Elasticsearch"},{"name":"Grails"},{"name":"Hibernate"},{"name":"Apache HttpClient"},{"name":"Apache HttpAsyncClient"},{"name":"AsyncHttpClient"},{"name":"OkHttp"},{"name":"JavaMail"},{"name":"JAX-RS"},{"name":"JAX-WS"},{"name":"JDBC"},{"name":"JMS"},{"name":"JSF"},{"name":"JSP"},{"name":"Kafka"},{"name":"JUL"},{"name":"Log4j"},{"name":"Logback"},{"name":"MongoDB"},{"name":"Netty"},{"name":"Play Framework"},{"name":"Quartz Scheduler"},{"name":"Redis"},{"name":"Servlets"},{"name":"Spring Framework"},{"name":"Struts"},{"name":"Vert.x"},{"name":"Tomcat"},{"name":"TomEE"},{"name":"Wildfly"},{"name":"JBoss EAP"},{"name":"Jetty"},{"name":"Glassfish"},{"name":"Payara"},{"name":"WebLogic"},{"name":"WebSphere"}]` | `[{"name":"Sidekiq"},{"name":"DelayedJob"},{"name":"ActiveJob"},{"name":"Sinatra"},{"name":"Grape"},{"name":"GraphQL"},{"name":"MCP"},{"name":"GitHub","native":true},{"name":"Rails","native":true}]` |
| language.primary | Java | - |
| license.spdx | Apache-2.0 | - |
| market.availability | - | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"web":true}` | `{"web":true}` |
| pricing | `{"type":"open_source","summary":"Open source, free","freeTier":true,"sourceUrl":"https://glowroot.org","retrievedAt":"2026-10-14T22:34:54.547Z"}` | `{"type":"hybrid","plans":[{"free":true,"name":"Free","components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"100,000 traces per month","contactSales":false,"includedLimits":{"traces":"100k/month"}},{"free":false,"name":"Pay-as-you-go","summary":"Starting at $20/month","components":[{"kind":"fixed","amount":20,"period":"month","currency":"USD"}],"description":"Automatic tier adjustment based on monthly traces","contactSales":false}],"summary":"Free tier with 100,000 monthly traces; paid tiers starting at $20/month","currency":"USD","freeTier":true,"sourceUrl":"https://www.skylight.io/pricing","retrievedAt":"2026-08-13T20:48:14.422Z","freeTrialDays":30,"startingPrice":{"amount":20,"period":"month","currency":"USD"},"billingPeriods":["month"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | free |
| pricing.price_level | free | free |
| pricing.transparent | yes | no |
| release.cadence_days | 27 | - |
| release.history | `[{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.8-beta.5","date":"2026-09-08T17:57:35Z","type":"prerelease","version":"v0.14.8-beta.5"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.8-beta.4","date":"2026-08-02T14:53:48Z","type":"prerelease","version":"v0.14.8-beta.4"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.8-beta.3","date":"2026-06-08T12:18:19Z","type":"prerelease","version":"v0.14.8-beta.3"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.8-beta.1","date":"2026-06-08T05:43:46Z","type":"prerelease","version":"v0.14.8-beta.1"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.7","date":"2026-05-11T08:58:46Z","type":"stable","version":"v0.14.7"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.7-beta.1","date":"2026-04-21T14:29:03Z","type":"prerelease","version":"v0.14.7-beta.1"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.6","date":"2026-03-24T11:20:48Z","type":"stable","version":"v0.14.6"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.6-beta.4","date":"2026-03-21T20:01:14Z","type":"prerelease","version":"v0.14.6-beta.4"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.6-beta.3","date":"2026-03-15T20:50:22Z","type":"prerelease","version":"v0.14.6-beta.3"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.6-beta.2","date":"2026-03-14T16:45:03Z","type":"prerelease","version":"v0.14.6-beta.2"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.5","date":"2026-03-08T16:38:11Z","type":"stable","version":"v0.14.5"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.5-beta.4","date":"2026-03-02T08:06:11Z","type":"prerelease","version":"v0.14.5-beta.4"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.5-beta.3","date":"2026-02-18T10:56:36Z","type":"prerelease","version":"v0.14.5-beta.3"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.5-beta.2","date":"2025-11-10T09:13:23Z","type":"prerelease","version":"v0.14.5-beta.2"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.5-beta.1","date":"2025-07-18T14:32:30Z","type":"prerelease","version":"v0.14.5-beta.1"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.4","date":"2025-05-25T16:31:13Z","type":"stable","version":"v0.14.4"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.3-beta.5","date":"2024-09-05T19:57:21Z","type":"prerelease","version":"v0.14.3-beta.5"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.3-beta.4","date":"2024-07-11T20:13:52Z","type":"prerelease","version":"v0.14.3-beta.4"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.2","date":"2024-04-07T14:22:23Z","type":"stable","version":"v0.14.2"},{"url":"https://github.com/glowroot/glowroot/releases/tag/v0.14.2-beta.5","date":"2024-04-03T14:44:24Z","type":"prerelease","version":"v0.14.2-beta.5"}]` | - |
| reliability.status_page | yes | yes |
| security.gdpr | - | yes |
| security.scorecard | 5.2 | - |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.glowroot%3Aglowroot-agent-api&per_page=100","last_12m":0,"max_severity":null}` | - |

## Capabilities (APM Tools)

| Capability | Glowroot | Skylight |
|---|:--:|:--:|
| **Instrumentation** |  |  |
| Auto-instrumentation | ✓ | ✓ |
| Distributed tracing | ✓ | - |
| **Insight** |  |  |
| Service map | - | - |
| Code / continuous profiling | ✓ | ✓ |
| Database monitoring | ✓ | ✓ |
| Error analytics | ✓ | ✓ |
| Real-user monitoring | - | ✗ |
| SLO / error-budget tracking | - | - |
| **Intelligence** |  |  |
| Anomaly / root-cause AI | - | ✓ |
| **Standards** |  |  |
| OpenTelemetry support | None | - |
| **Core** |  |  |
| Language agents | Java | Ruby, Rails, Sinatra, Grape |
| **Deployment** |  |  |
| Hosting | Self-hosted only | Cloud only |

*Source: vioscaleAI. Generated 2026-10-16T19:00:22.736Z. "-" = undocumented, not absent.*