Moquette
Moquette: A compact, free MQTT 3 and 5 broker for self-hosted Java and IoT deployments. Ranked #33 of 39 in Message Broker Software by our editors (6.0/10); pricing: Free plan; best for compact MQTT 3 and 5 broker.
At a glance
- Editor score6.0 / 10
- PricingFree plan
- Best forCompact MQTT 3 and 5 broker
- Free planYes
- Paid fromFree
- Deployment modelSelf_hosted
- Facts checked20 Sep 2026
Where it wins
- Supports MQTT 3 and MQTT 5 with QoS 0, 1, and 2
- Embeds as a dependency in Java projects or runs as a self-contained distribution
- Includes expiry, shared subscriptions, flow control, and access control
Where it doesn't
- Verified platform coverage is limited to Windows and Android
- Self-hosted deployment requires managing the broker environment
- The documentation is dated
Our verdict on Moquette
Moquette is an open-source Java MQTT broker for Internet of Things applications and embedded software. It is designed for teams that need a compact, self-hosted broker supporting both MQTT 3 and MQTT 5. The project can run as a self-contained distribution or be embedded as a dependency in Java projects, making it a fit for JVM-based applications that need broker functionality within their own deployment model.
Its feature set covers core MQTT delivery and session behavior, including QoS 0, QoS 1, QoS 2, session and message expiry, shared subscriptions, request/response messaging, topic aliases, flow control, and subscription options. It also includes will delay, server disconnects, payload format indicators, TLS/SSL configuration, and access control. Delivery guarantees are configurable, while the free and open-source model keeps the product aligned with self-hosted deployments rather than a hosted service plan structure.
Moquette suits developers and IoT teams that value embeddability, MQTT 3 and 5 coverage, and control over deployment. Its main trade-off is platform breadth: verified coverage is limited to Windows and Android, so teams requiring broader documented platform support should evaluate alternatives. The dated documentation may also add friction during onboarding, even though the project shows ongoing maintenance through its 0.18.1 release. Choose Moquette when a focused MQTT broker for Java or IoT software is the priority; choose another product when broader platform coverage or a more guided operating model matters more.
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Moquette pricing
Moquette fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Deployment model | Self_hosted |
| Delivery guarantees | Configurable |
| Dead-letter queues | Not verified |
| Ordering guarantees | Not verified |
| Maximum message size | Not verified |
| Supported protocols | MQTT 3, MQTT 5 |
| Deployment | Self-hosted |
| Platforms | Windows, Android |
| Support | Community, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | moquette-io.github.io |
| Facts checked | 20 Sep 2026 |
Alternatives to Moquette
- RabbitMQA broad, open-source broker for queues, routing, streaming, and hybrid deployments.9.4
- Solace PubSub+ Event BrokerA broad hybrid event broker for teams connecting applications, services and devices.9.2
- Google Cloud Pub/SubA managed cloud pub/sub service with strong delivery controls and usage-based pricing.9.1
See all Moquette alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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