# NATS

- **Canonical URI:** https://www.vioscale.ai/software/nats
- **Category:** Message Queues
- **Homepage:** https://nats.io
- **Also known as:** nats
- **Profile claimed by vendor:** no
- **Last updated:** 2026-08-05T13:33:27.196Z

## Vioscale score

**75.9 / 100**, confidence 30% (low).

Composite of weighted, independently-sourced signals (no user reviews, no vendor payment).

| Signal | Score | Weight | Contribution | Evidence present |
|---|--:|--:|--:|:--:|
| capabilities | 67.1 | 0.07 | 4.7 | ✓ |
| github_stars | 81.3 | 0.029 | 2.4 | ✓ |
| integrations | 0 | 0.094 | 0 | - |
| github_activity | 63.1 | 0.105 | 6.6 | ✓ |
| release_cadence | 97.8 | 0.058 | 5.7 | ✓ |
| security_posture | 5 | 0.129 | 0 | - |
| package_downloads | 79.4 | 0.152 | 12.1 | ✓ |
| stackoverflow_activity | 0 | 0.07 | 0 | - |

## Pricing

_As of 2026-08-05, [verify at source](https://nats.io). Independently observed._

Open source · Free tier

## About

NATS is a high-performance, lightweight, open-source messaging system that unifies messaging, streaming, and state into one real-time system for building distributed systems across any cloud or edge environment.

_Independently observed._

## Platform & deployment

- **Platforms:** CLI
- **Deployment:** Self-hosted

## Capabilities

_The capabilities that matter for Message Queues. "-" = undocumented, not absent._

| Capability | Supported |
|---|:--:|
| **Core** | |
| Messaging paradigm | Pub/sub |
| **Correctness** | |
| Delivery guarantee | - |
| Ordering guarantee | - |
| **Durability** | |
| Durable replayable log | ✓ |
| Message replay / rewind | ✓ |
| **Interop** | |
| Wire protocol | - |
| Kafka-protocol compatible | - |
| **Scale** | |
| Partitioned horizontal scaling | ✓ |
| **Consumption** | |
| Consumer groups / competing consumers | ✓ |
| Dead-letter queue | - |
| **Scale** | |
| Geo / cross-region replication | - |
| **Deployment** | |
| Managed cloud offering exists | - |
| Hosting | Self-hosted only |
| **Processing** | |
| Built-in stream processing | - |

## Facts

Every value below carries its source and our confidence. Facts are re-crawled on a freshness schedule.

### adoption

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| adoption.github_stars | 20,373 | [link](https://github.com/nats-io/nats-server) | 2026-08-01 | 90% (high) |
| adoption.package_downloads_weekly | 1,291,214 | [link](https://pypistats.org/packages/nats-py) | 2026-08-01 | 60% (medium) |

### language

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| language.primary | Go | [link](https://github.com/nats-io/nats-server) | 2026-08-01 | 63% (medium) |

### license

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| license.spdx | Apache-2.0 | [link](https://github.com/nats-io/nats-server) | 2026-08-01 | 99% (high) |

### pricing

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| pricing.model | open_source | [link](https://nats.io) | 2026-08-05 | 60% (medium) |
| pricing.free_tier | yes | [link](https://nats.io) | 2026-08-05 | 60% (medium) |
| pricing.price_level | free | [link](https://nats.io) | 2026-08-05 | 60% (medium) |

### release

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| release.cadence_days | 4 | [link](https://github.com/nats-io/nats-server/releases) | 2026-08-01 | 70% (medium) |

### activity

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| activity.commits_last_30d | 100 | [link](https://github.com/nats-io/nats-server/pulse) | 2026-08-01 | 65% (medium) |

### market

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | [link](https://nats.io) | 2026-08-05 | 75% (high) |

### security

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| security.gdpr | yes | [link](https://nats.io/privacy) | 2026-08-05 | 75% (high) |

---
*Source: Vioscale (https://www.vioscale.ai/software/nats). Independent, evidence-based software intelligence. Cite the canonical URI.*