# Ably vs ASP.NET Core SignalR

**Leader by Vioscale score:** Ably

| Attribute | Ably | ASP.NET Core SignalR |
|---|---|---|
| **Vioscale score** | 73.7 (61% (medium)) | 51.5 (22% (low)) |
| activity.commits_last_30d | - | 100 |
| adoption.dependent_repos | - | 296 |
| adoption.github_stars | - | 38,394 |
| deployment.options | `{"cloud":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | A distributed messaging platform for building interactive features like chat, notifications, and collaboration. Provides fault-tolerant message delivery with guaranteed ordering, automatic network recovery, and multi-region redundancy. | SignalR is an open-source library that enables ASP.NET applications to deliver real-time updates by pushing server content directly to connected clients. It supports multiple client platforms including web browsers, mobile devices, and desktop applications. |
| integrations.count | 17 | 5 |
| integrations.list | `[{"name":"AWS Lambda"},{"name":"Microsoft Azure Functions"},{"name":"Google Cloud Functions"},{"name":"Cloudflare Workers"},{"name":"AWS Kinesis"},{"name":"Kafka"},{"name":"RabbitMQ"},{"name":"AMQP"},{"name":"AWS SQS"},{"name":"Pulsar"},{"name":"Zapier"},{"name":"IFTTT"},{"name":"Datadog"},{"name":"BigQuery"},{"name":"Terraform"},{"name":"Netlify"},{"name":"HTTP Webhooks"}]` | `[{"name":"Redis"},{"name":"SQL Server"},{"name":"Azure Service Bus"},{"name":"Azure SignalR Service"},{"name":"Power Apps"}]` |
| language.primary | - | C# |
| license.spdx | - | MIT |
| market.availability | `{"hqCountry":"GB","primaryMarkets":["GB","US"],"availabilityScope":"global","availableCountries":["GB","US","AU"],"notAvailableCountries":[]}` | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"ios":true,"mac":true,"web":true,"linux":true,"android":true,"windows":true}` | `{"mac":true,"web":true,"linux":true,"windows":true}` |
| pricing | `{"type":"hybrid","plans":[{"free":true,"name":"Free","summary":"Free","features":["All Ably products included","Community and email support","No commitment"],"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"Proof of concept development","contactSales":false,"includedLimits":{"message_size":"64KiB","message_storage":"1 day","concurrent_connections":"200"}},{"free":false,"name":"Standard","summary":"$29/month plus usage charges","features":["1 day email support SLA"],"components":[{"kind":"fixed","amount":29,"period":"month","currency":"USD"},{"per":{"qty":1000000,"unit":"messages"},"kind":"metered","amount":2.5,"currency":"USD"},{"per":{"qty":1000000,"unit":"channel_minutes"},"kind":"metered","amount":1,"currency":"USD"},{"per":{"qty":1,"unit":"GiB"},"kind":"metered","amount":0.25,"currency":"USD"}],"description":"Production deployment","contactSales":false},{"free":false,"name":"Pro","summary":"$399/month plus usage charges","features":["4 hour email support SLA","Datadog lite monitoring"],"components":[{"kind":"fixed","amount":399,"period":"month","currency":"USD"},{"per":{"qty":1000000,"unit":"messages"},"kind":"metered","amount":2.5,"currency":"USD"},{"per":{"qty":1000000,"unit":"channel_minutes"},"kind":"metered","amount":1,"currency":"USD"},{"per":{"qty":1,"unit":"GiB"},"kind":"metered","amount":0.25,"currency":"USD"}],"description":"Business critical workloads","contactSales":false},{"free":false,"name":"Enterprise","summary":"Custom pricing","features":["24/7 mission critical support","99.999% uptime SLA","Committed use discounts","Datadog integration","SSO and SCIM","CNAME custom domain","Architectural guidance","Regional data routing","Dedicated cluster"],"contactSales":true}],"summary":"Free tier available. Paid plans start at $29/month with per-million message and channel minute billing.","currency":"USD","freeTier":true,"sourceUrl":"https://ably.com/pricing","retrievedAt":"2026-08-19T18:25:09.786Z","startingPrice":{"amount":29,"period":"month","currency":"USD"},"billingPeriods":["month"]}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://dotnet.microsoft.com/en-us/apps/aspnet/signalr","retrievedAt":"2026-08-19T23:11:59.751Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | open_source |
| pricing.price_level | mid | free |
| pricing.starting_price | `{"amount":29,"currency":"USD"}` | - |
| pricing.transparent | yes | - |
| release.history | - | `[{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v8.0.30","date":"2026-08-11T19:33:52Z","type":"stable","version":"v8.0.30"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v9.0.19","date":"2026-08-11T21:09:36Z","type":"stable","version":"v9.0.19"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v10.0.11","date":"2026-08-11T21:44:32Z","type":"stable","version":"v10.0.11"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v8.0.29","date":"2026-07-14T21:57:27Z","type":"stable","version":"v8.0.29"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v10.0.10","date":"2026-07-15T00:37:48Z","type":"stable","version":"v10.0.10"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v9.0.18","date":"2026-07-15T00:14:08Z","type":"stable","version":"v9.0.18"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v9.0.17","date":"2026-06-09T19:09:17Z","type":"stable","version":"v9.0.17"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v8.0.28","date":"2026-06-09T18:28:00Z","type":"stable","version":"v8.0.28"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v11.0.0-preview.4","date":"2026-05-12T20:57:10Z","type":"prerelease","version":"v11.0.0-preview.4"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v10.0.9","date":"2026-06-09T19:51:13Z","type":"stable","version":"v10.0.9"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v9.0.16","date":"2026-05-12T18:41:14Z","type":"stable","version":"v9.0.16"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v8.0.27","date":"2026-05-12T18:40:22Z","type":"stable","version":"v8.0.27"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v10.0.8","date":"2026-05-12T18:26:28Z","type":"stable","version":"v10.0.8"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v10.0.6","date":"2026-04-20T18:54:24Z","type":"stable","version":"v10.0.6"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v9.0.15","date":"2026-04-14T20:59:10Z","type":"stable","version":"v9.0.15"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v8.0.26","date":"2026-04-14T20:58:43Z","type":"stable","version":"v8.0.26"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v11.0.0-preview.2.26159.112","date":"2026-04-14T19:57:04Z","type":"prerelease","version":"v11.0.0-preview.2.26159.112"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v9.0.14","date":"2026-03-10T20:18:56Z","type":"stable","version":"v9.0.14"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v10.0.5","date":"2026-03-12T21:03:06Z","type":"stable","version":"v10.0.5"},{"url":"https://github.com/dotnet/aspnetcore/releases/tag/v10.0.4","date":"2026-03-10T20:21:13Z","type":"stable","version":"v10.0.4"}]` |
| reliability.sla_pct | 99.999 | 99.9 |
| reliability.status_page | yes | - |
| security.gdpr | yes | - |
| security.hipaa | yes | - |
| security.scorecard | - | 6.8 |
| security.soc2 | yes | - |
| security.vulnerabilities | - | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40microsoft%2Fsignalr-protocol-msgpack&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Realtime Messaging Infra)

| Capability | Ably | ASP.NET Core SignalR |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Presence | - | - |
| Message history replay | - | - |
| Delivery guarantee | - | - |
| Global edge network | - | - |
| Scaling model | - | - |
| Offline reconnect catchup | - | - |
| Push notification bridge | - | - |
| Auth model | - | - |
| Self hostable | - | - |
| Mqtt support | - | - |
| Deployment | - | - |
| Pricing model | - | - |

*Source: Vioscale. Generated 2026-09-01T17:01:05.143Z. "-" = undocumented, not absent.*