# NATS vs NSQ

**Leader by vioscaleAI score:** NATS

| Attribute | NATS | NSQ |
|---|---|---|
| **vioscaleAI score** | 67.8 (58% (medium)) | 37.5 (37% (low)) |
| activity.commits_last_30d | 100 | 0 |
| adoption.dependent_repos | 24,884 | 39 |
| adoption.github_stars | 20,867 | 25,772 |
| adoption.package_downloads_weekly | 1,353,667 | - |
| content.faq | `[{"answer":"NATS enables components of a distributed software system to send messages to each other. It is an open-source project maintained by the Cloud Native Computing Foundation and can be deployed across cloud environments, on-site servers, edge computing devices, and embedded systems. It is indexed under Message Queues.","source":"https://nats.io","question":"What is NATS?","confidence":0.6},{"answer":"NATS 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://nats.io","question":"Is NATS free to use?","confidence":0.6},{"answer":"NATS supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://nats.io","question":"What platforms does NATS support?","confidence":0.6},{"answer":"Yes. NATS can be deployed cloud / SaaS, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://nats.io","question":"Can NATS be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed GDPR for NATS. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as NATS not holding them. Always confirm compliance directly before you rely on it.","source":"https://nats.io/privacy","question":"What security certifications does NATS have?","confidence":0.7},{"answer":"Yes. NATS 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/nats-io/nats-server","question":"Is NATS open source?","confidence":0.95}]` | `[{"answer":"Distributed message queue system designed for high-throughput, real-time message delivery across fault-tolerant clusters without centralized brokers. Supports both load-balanced queuing and publish-subscribe messaging patterns with minimal operational overhead and configuration complexity. It is indexed under Message Queues.","source":"https://nsq.io/","question":"What is NSQ?","confidence":0.6},{"answer":"NSQ is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.","source":"https://nsq.io/","question":"Is NSQ free to use?","confidence":0.6},{"answer":"NSQ supports the web, Windows, macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://nsq.io/","question":"What platforms does NSQ support?","confidence":0.6},{"answer":"Yes. NSQ can be deployed on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://nsq.io/","question":"Can NSQ be self-hosted?","confidence":0.6},{"answer":"Yes. NSQ 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/nsqio/nsq","question":"Is NSQ open source?","confidence":0.95}]` |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | An open-source, lightweight messaging platform that combines pub/sub, request/reply, and persistent streaming capabilities into a single system for building high-performance distributed applications. | A platform for distributing messages across interconnected systems with built-in redundancy and automatic failover to prevent single-component failures and maintain continuous operation. |
| features.capabilities | `{"hosting":"self","paradigm":"pubsub","message_replay":true,"persistent_log":true,"consumer_groups":true,"geo_replication":true,"managed_offering":true,"horizontal_scaling":true}` | `{"hosting":"self","ordering":"none","paradigm":"queue","protocol":"TCP","persistent_log":true,"consumer_groups":true,"geo_replication":false,"kafka_compatible":false,"managed_offering":false,"delivery_guarantee":"at_least_once","horizontal_scaling":true}` |
| integrations.count | 12 | 1 |
| integrations.list | `[{"name":"Stripe","category":"payments"},{"name":"Apache Kafka","category":"messaging"},{"name":"Apache Spark","category":"data_processing"},{"name":"Apache Flink","category":"stream_processing"},{"name":"RabbitMQ","category":"messaging"},{"name":"Prometheus","category":"monitoring"},{"name":"RisingWave","category":"stream_database"},{"name":"Caddy","category":"web_server"},{"name":"Deepstream","category":"messaging"},{"name":"Synadia","category":"platform_service"},{"name":"Gatling","category":"load_testing"},{"name":"Yii","category":"web_framework"}]` | `[{"name":"statsd"}]` |
| language.primary | Go | Go |
| license.spdx | Apache-2.0 | MIT |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"cli":true,"web":true}` | `{"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://nats.io","retrievedAt":"2026-10-13T15:14:05.510Z"}` | `{"type":"open_source","sourceUrl":"https://nsq.io/","retrievedAt":"2026-09-10T16:02:27.919Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| pricing.transparent | - | yes |
| release.cadence_days | 1 | 84 |
| release.history | `[{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.15.1","date":"2026-10-09T08:40:47Z","type":"stable","version":"v2.15.1"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.8","date":"2026-10-09T08:40:31Z","type":"stable","version":"v2.14.8"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.15.1-RC.2","date":"2026-10-06T10:57:55Z","type":"prerelease","version":"v2.15.1-RC.2"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.8-RC.2","date":"2026-10-06T10:56:59Z","type":"prerelease","version":"v2.14.8-RC.2"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.15.1-RC.1","date":"2026-09-28T17:12:45Z","type":"prerelease","version":"v2.15.1-RC.1"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.8-RC.1","date":"2026-09-28T17:12:29Z","type":"prerelease","version":"v2.14.8-RC.1"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.15.0","date":"2026-09-17T13:30:47Z","type":"stable","version":"v2.15.0"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.15.0-RC.2","date":"2026-09-15T16:27:50Z","type":"prerelease","version":"v2.15.0-RC.2"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.7","date":"2026-09-15T15:10:36Z","type":"stable","version":"v2.14.7"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.7-RC.2","date":"2026-09-14T15:48:51Z","type":"prerelease","version":"v2.14.7-RC.2"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.7-RC.1","date":"2026-09-10T16:05:31Z","type":"prerelease","version":"v2.14.7-RC.1"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.15.0-RC.1","date":"2026-09-07T16:35:00Z","type":"prerelease","version":"v2.15.0-RC.1"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.6","date":"2026-08-27T15:21:20Z","type":"stable","version":"v2.14.6"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.6-RC.2","date":"2026-08-26T17:01:24Z","type":"prerelease","version":"v2.14.6-RC.2"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.6-RC.1","date":"2026-08-25T16:47:43Z","type":"prerelease","version":"v2.14.6-RC.1"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.15.0-preview.1","date":"2026-08-24T13:33:40Z","type":"prerelease","version":"v2.15.0-preview.1"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.5","date":"2026-08-12T15:31:27Z","type":"stable","version":"v2.14.5"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.15","date":"2026-08-12T15:30:42Z","type":"stable","version":"v2.12.15"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.4","date":"2026-07-30T13:57:21Z","type":"stable","version":"v2.14.4"},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.14","date":"2026-07-30T13:56:36Z","type":"stable","version":"v2.12.14"}]` | `[{"url":"https://github.com/nsqio/nsq/releases/tag/v1.3.0","date":"2023-12-27T05:04:56Z","type":"stable","version":"v1.3.0"},{"url":"https://github.com/nsqio/nsq/releases/tag/v1.2.1","date":"2021-08-16T01:28:41Z","type":"stable","version":"v1.2.1"},{"url":"https://github.com/nsqio/nsq/releases/tag/v1.2.0","date":"2019-08-28T15:42:22Z","type":"stable","version":"v1.2.0"},{"url":"https://github.com/nsqio/nsq/releases/tag/v1.1.0","date":"2018-08-19T23:53:01Z","type":"stable","version":"v1.1.0"},{"url":"https://github.com/nsqio/nsq/releases/tag/v1.1.0-rc1","date":"2018-07-31T15:11:14Z","type":"prerelease","version":"v1.1.0-rc1"},{"url":"https://github.com/nsqio/nsq/releases/tag/v1.0.0-compat","date":"2017-03-22T19:58:21Z","type":"stable","version":"v1.0.0-compat"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.3.8","date":"2016-05-26T16:57:39Z","type":"stable","version":"v0.3.8"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.3.7","date":"2016-02-24T06:22:01Z","type":"stable","version":"v0.3.7"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.3.6","date":"2015-09-25T14:28:15Z","type":"stable","version":"v0.3.6"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.3.5","date":"2015-04-26T22:40:31Z","type":"stable","version":"v0.3.5"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.3.4","date":"2015-04-26T21:58:36Z","type":"stable","version":"v0.3.4"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.3.3","date":"2015-04-26T21:20:42Z","type":"stable","version":"v0.3.3"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.3.2","date":"2015-02-08T18:08:30Z","type":"stable","version":"v0.3.2"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.3.1","date":"2015-01-22T06:12:20Z","type":"stable","version":"v0.3.1"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.3.0","date":"2014-11-18T15:14:35Z","type":"stable","version":"v0.3.0"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.2.31","date":"2014-08-26T14:51:27Z","type":"stable","version":"v0.2.31"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.2.30","date":"2014-07-29T04:05:10Z","type":"stable","version":"v0.2.30"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.2.29","date":"2014-07-25T12:39:19Z","type":"stable","version":"v0.2.29"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.2.28","date":"2014-04-29T03:25:31Z","type":"stable","version":"v0.2.28"},{"url":"https://github.com/nsqio/nsq/releases/tag/v0.2.27","date":"2014-02-17T14:24:17Z","type":"stable","version":"v0.2.27"}]` |
| reliability.status_page | - | yes |
| security.disclosure_policy | yes | - |
| security.gdpr | yes | - |
| security.scorecard | 7.4 | 3.5 |
| security.vulnerabilities | `{"count":29,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fnats-io%2Fnats-server%2Fv2&per_page=100","last_12m":14,"max_severity":"CRITICAL"}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fnsqio%2Fnsq&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Message Queues)

| Capability | NATS | NSQ |
|---|:--:|:--:|
| **Core** |  |  |
| Messaging paradigm | Pub/sub | Queue |
| **Correctness** |  |  |
| Delivery guarantee | - | At-least-once |
| Ordering guarantee | - | None |
| **Durability** |  |  |
| Durable replayable log | ✓ | ✓ |
| Message replay / rewind | ✓ | - |
| **Interop** |  |  |
| Wire protocol | - | TCP |
| Kafka-protocol compatible | - | ✗ |
| **Scale** |  |  |
| Partitioned horizontal scaling | ✓ | ✓ |
| Geo / cross-region replication | ✓ | ✗ |
| **Consumption** |  |  |
| Consumer groups / competing consumers | ✓ | ✓ |
| Dead-letter queue | - | - |
| **Deployment** |  |  |
| Managed cloud offering exists | ✓ | ✗ |
| Hosting | Self-hosted only | Self-hosted only |
| **Processing** |  |  |
| Built-in stream processing | - | - |

*Source: vioscaleAI. Generated 2026-10-16T19:18:33.020Z. "-" = undocumented, not absent.*