# Castr vs SRS

**Leader by vioscaleAI score:** Castr

| Attribute | Castr | SRS |
|---|---|---|
| **vioscaleAI score** | 69.4 (61% (medium)) | 47.7 (60% (medium)) |
| activity.commits_last_30d | - | 22 |
| adoption.dependent_repos | - | 0 |
| adoption.github_stars | - | 29,216 |
| content.faq | `[{"answer":"Consolidates live video streaming, hosting, multistreaming to multiple destinations, recording, and monetization into a single platform with 24/7 human support included. It is indexed under Live Streaming.","source":"https://castr.com/pricing/","question":"What is Castr?","confidence":0.6},{"answer":"Castr offers a free tier, so you can start without paying. Paid plans start at $19.99 per month. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.","source":"https://castr.com/pricing/","question":"Is Castr free?","confidence":0.6},{"answer":"Castr supports the web, iOS and Android. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://castr.com/pricing/","question":"What platforms does Castr support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Castr, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://castr.com/pricing/","question":"Can Castr be self-hosted?","confidence":0.6},{"answer":"We have confirmed 5 integrations for Castr, including Wirecast, YouTube, Facebook, LinkedIn and Twitch. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://castr.com/pricing/","question":"What does Castr integrate with?","confidence":0.6},{"answer":"We have independently confirmed GDPR for Castr. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Castr not holding them. Always confirm compliance directly before you rely on it.","source":"https://castr.com/pricing/","question":"What security certifications does Castr have?","confidence":0.6}]` | `[{"answer":"A high-performance server that handles multiple streaming protocols and codec formats, supporting Linux and macOS across various processor architectures. It is indexed under Live Streaming.","source":"https://ossrs.io","question":"What is SRS?","confidence":0.6},{"answer":"SRS offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://ossrs.io","question":"Is SRS free?","confidence":0.6},{"answer":"SRS supports macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://ossrs.io","question":"What platforms does SRS support?","confidence":0.6},{"answer":"Yes. SRS can be deployed on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://ossrs.io","question":"Can SRS be self-hosted?","confidence":0.6},{"answer":"Yes. SRS is published under the MIT 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/ossrs/srs","question":"Is SRS open source?","confidence":0.95}]` |
| deployment.options | `{"cloud":true}` | `{"on_prem":true,"self_hosted":true}` |
| description.long | Consolidates live video streaming, hosting, multistreaming to multiple destinations, recording, and monetization into a single platform with 24/7 human support included. | A high-performance server that handles multiple streaming protocols and codec formats, supporting Linux and macOS across various processor architectures. |
| features.capabilities | `{"pricing_model":"flat_monthly_subscription","architecture_model":"browser_cloud_studio","simulcast_multi_destination_rtmp_output_hub":true,"srt_secure_reliable_transport_protocol_support":true}` | `{"pricing_model":"free_open_source","gpl_or_permissive_oss_license":true,"srt_secure_reliable_transport_protocol_support":true}` |
| integrations.count | 5 | - |
| integrations.list | `[{"name":"Wirecast","native":true,"category":"broadcasting","direction":"inbound"},{"name":"YouTube","native":true,"category":"video","direction":"outbound"},{"name":"Facebook","native":true,"category":"social","direction":"outbound"},{"name":"LinkedIn","native":true,"category":"social","direction":"outbound"},{"name":"Twitch","native":true,"category":"streaming","direction":"outbound"}]` | - |
| language.primary | - | C++ |
| license.spdx | - | MIT |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"ios":true,"web":true,"android":true}` | `{"cli":true,"mac":true,"linux":true}` |
| pricing | `{"type":"subscription","plans":[{"free":false,"name":"Starter","summary":"$19.99/month or $199.99/year (2 months free)","features":["Multiple ingest protocols and SRT","Embedded player and video analytics","Cloud recording and Live-to-VOD"],"components":[{"kind":"fixed","amount":19.99,"period":"month","currency":"USD"}],"contactSales":false},{"free":false,"name":"Standard","summary":"$499.99/year","features":["SRT/RTMP pull links"],"components":[{"kind":"fixed","amount":499.99,"period":"year","currency":"USD"}],"contactSales":false},{"free":false,"name":"Premium","summary":"$199.99/month or $1,999.99/year (2 months free)","features":["Adaptive bitrate and custom transcoding","API access and three team members"],"components":[{"kind":"fixed","amount":199.99,"period":"month","currency":"USD"}],"contactSales":false},{"free":false,"name":"Enterprise","summary":"$3,499.99/year","features":["Low-latency playback and HLS for VOD","Dedicated support on annual billing"],"components":[{"kind":"fixed","amount":3499.99,"period":"year","currency":"USD"}],"contactSales":false},{"free":false,"name":"Events","summary":"$7,499.99/year","features":["Branded web app included","Native mobile and TV apps available as add-ons"],"components":[{"kind":"fixed","amount":7499.99,"period":"year","currency":"USD"}],"contactSales":false}],"addOns":[{"name":"DRM"},{"name":"Native mobile and TV apps"}],"summary":"From $19.99/month ($199.99/year with 2 months free). Free 7-day trial on Starter plan.","currency":"USD","freeTier":true,"sourceUrl":"https://castr.com/pricing/","retrievedAt":"2026-09-01T14:45:16.675Z","freeTrialDays":7,"startingPrice":{"amount":19.99,"period":"month","currency":"USD"},"billingPeriods":["month","year"]}` | `{"type":"free","summary":"Free and open-source","freeTier":true,"sourceUrl":"https://ossrs.io","retrievedAt":"2026-09-01T16:07:34.308Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | free |
| pricing.price_level | mid | free |
| pricing.starting_price | `{"amount":19.99,"currency":"USD"}` | - |
| pricing.transparent | yes | yes |
| release.cadence_days | - | 30 |
| release.history | - | `[{"url":"https://github.com/ossrs/srs/releases/tag/v7.0-d0","date":"2026-08-12T20:51:49Z","type":"prerelease","version":"v7.0-d0"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-r1","date":"2026-08-12T18:06:49Z","type":"stable","version":"v6.0-r1"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-r0","date":"2025-12-03T15:36:14Z","type":"stable","version":"v6.0-r0"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-b3","date":"2025-11-03T19:55:15Z","type":"stable","version":"v6.0-b3"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-b2","date":"2025-10-16T15:12:31Z","type":"stable","version":"v6.0-b2"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-b1","date":"2025-09-16T02:13:42Z","type":"stable","version":"v6.0-b1"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-b0","date":"2025-08-12T15:52:35Z","type":"stable","version":"v6.0-b0"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-a2","date":"2025-05-04T01:14:57Z","type":"prerelease","version":"v6.0-a2"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-a1","date":"2024-09-01T08:40:33Z","type":"prerelease","version":"v6.0-a1"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-a0","date":"2024-07-27T04:11:26Z","type":"prerelease","version":"v6.0-a0"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-d6","date":"2024-07-04T08:58:09Z","type":"prerelease","version":"v6.0-d6"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-d5","date":"2024-06-15T10:24:03Z","type":"prerelease","version":"v6.0-d5"},{"url":"https://github.com/ossrs/srs/releases/tag/v5.0-r3","date":"2024-06-15T10:10:00Z","type":"stable","version":"v5.0-r3"},{"url":"https://github.com/ossrs/srs/releases/tag/v5.0-r2","date":"2024-04-03T07:45:39Z","type":"stable","version":"v5.0-r2"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-d4","date":"2024-02-15T14:00:45Z","type":"prerelease","version":"v6.0-d4"},{"url":"https://github.com/ossrs/srs/releases/tag/v5.0-r1","date":"2024-02-15T04:52:45Z","type":"stable","version":"v5.0-r1"},{"url":"https://github.com/ossrs/srs/releases/tag/v5.0-r0","date":"2023-12-30T02:12:44Z","type":"stable","version":"v5.0-r0"},{"url":"https://github.com/ossrs/srs/releases/tag/v6.0-d3","date":"2023-11-20T01:27:34Z","type":"prerelease","version":"v6.0-d3"},{"url":"https://github.com/ossrs/srs/releases/tag/v5.0-b7","date":"2023-11-19T14:38:52Z","type":"stable","version":"v5.0-b7"},{"url":"https://github.com/ossrs/srs/releases/tag/v5.0-b6","date":"2023-10-25T14:01:52Z","type":"stable","version":"v5.0-b6"}]` |
| reliability.sla_pct | 99.9 | - |
| reliability.status_page | yes | - |
| security.gdpr | yes | - |
| security.scorecard | - | 6.2 |
| security.vulnerabilities | - | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fossrs%2Fsrs&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Live Streaming)

| Capability | Castr | SRS |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Architecture model | Browser cloud studio | - |
| Simulcast multi destination rtmp output hub | ✓ | - |
| Remote guest browser invites for interviews webrtc | - | - |
| Custom lower thirds graphics and brand overlays | - | - |
| ISO track recording for isolated guest audio video | - | - |
| Hardware encoding acceleration nvenc quicksync | - | - |
| Srt secure reliable transport protocol support | ✓ | ✓ |
| Multi network unified aggregated chat feed | - | - |
| Chroma key green screen and virtual backgrounds | - | - |
| Ndi network device interface feed ingestion | - | - |
| SOC2 type ii | - | - |
| Gpl or permissive oss license | - | ✓ |
| Pricing model | Flat monthly subscription | Free open source |

*Source: vioscaleAI. Generated 2026-09-11T23:37:59.296Z. "-" = undocumented, not absent.*