flespi MQTT Broker review
A managed MQTT broker with shared subscriptions and REST controls, priced from €130/month.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
For IoT applications and software services that need a cloud-hosted message broker, flespi MQTT Broker combines protocol support with controls for client access and message flow. It supports MQTT 3.1, 3.1.1, and 5.0 over TCP and WebSockets, with SSL-secured connection options. Token-based authorization and ACLs govern access to topics, while retained messages and persistent sessions support common MQTT patterns. This is a managed service rather than open-source software, and it can be used separately from flespi's telematics services.
Its feature set goes beyond basic message routing. Shared subscriptions offer load balancing and sticky distribution, and a REST API can publish messages and manage sessions. Broker logs are also available through REST or MQTT. The combination may suit teams that want both MQTT client access and API-based broker operations without managing broker hosting themselves. The published platform details describe web and API access, but do not identify third-party integrations, so buyers with a specific ecosystem requirement should verify fit before committing.
According to the vendor's pricing page, the Free plan is for testing and development. Commercial (Start) is €130/month, Commercial (Pro) €400/month, Commercial (Enterprise) €1,000/month, and Commercial (Ultimate) €3,000/month; each paid tier is described as pay-as-you-use. Pricing applies to the broader flespi platform and includes usage-based extras, rather than being standalone broker pricing. The documented active MQTT session limit for the cheapest paid tier is 5,000. The Free plan offers a way to evaluate the service, while the entry commercial tier makes the cost of production use worth weighing against a broker with separately stated standalone pricing. Pick flespi when its managed MQTT capabilities and REST controls align with your platform needs; look elsewhere if you require a standalone broker price or a specified integration ecosystem.
flespi MQTT Broker pros and cons
- Where it wins
- Supports MQTT 3.1, 3.1.1, and 5.0 over TCP and WebSockets
- Combines retained messages, persistent sessions, and shared subscriptions
- REST API supports message publishing and session management
- Where it doesn't
- Paid plans start at €130/month, with usage-based extras
- The Free plan is positioned for testing and development
- The broker is part of the broader flespi platform
flespi MQTT Broker fact sheet, pricing and score →
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