MQTT.Agent - open protocol for AI agents

Spec
Platform Comparison

CloudSignal vs EMQX Cloud
Same Protocol, Different Audience

Both are MQTT brokers, so your clients are portable in either direction. The real question is whether you want EMQX's industrial IoT toolkit or a developer-first runtime with flat pricing and AI Transport built in.

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Feature-by-Feature Comparison

An honest side-by-side. We call out where EMQX has the stronger story.

Feature
CloudSignal
EMQX Cloud
Protocol
Both speak the same open protocol, so your client code ports in either direction
MQTT 3.1.1 and MQTT 5 (open ISO/IEC standard)
MQTT 3.1.1 and MQTT 5, plus MQTT-SN and proprietary extensions
Pricing model
EMQX Cloud Serverless bills on session-minutes and traffic, which is harder to forecast
Flat monthly tiers with all features included
Per-session and per-data pricing with feature-gated add-ons
Free tier
Both have free entry points. CloudSignal caps free tier users, EMQX caps free tier traffic
Unlimited time, no credit card, 3 MQTT users
Serverless free tier with monthly session and traffic caps
Security model
CloudSignal exposes ACL rules as editable rule sets in the dashboard. EMQX is config-driven
Broker-enforced ACL rule sets with a visual dashboard
Broker-enforced ACLs configurable via files, REST API, or external auth backends
Developer experience
Different audiences. EMQX rewards platform expertise. CloudSignal rewards shipping fast
Built for application developers shipping product features
Built for IoT and platform engineers with deep configuration needs
AI integration
If your roadmap includes AI chat or agent communication, this is a real category difference
AI Transport for Vercel AI SDK with streaming and offline resume
No first-party AI streaming product
Data residency
EMQX has broader cloud coverage. CloudSignal is focused on EU and US for now
EU and US regions with clear residency commitments
Multi-cloud regions including AWS, Azure, GCP, and Alibaba Cloud
Rules and processing engine
EMQX has a mature in-broker rules engine. CloudSignal handles transformations downstream
REST API bridge and webhook delivery
Built-in SQL-based rules engine with bridges to Kafka, databases, and time-series stores
Self-host option
EMQX has a complete self-host and on-prem story today
Fully managed cloud only
Open-source EMQX, EMQX Enterprise, and EMQX Cloud
Vendor lock-in
Both are MQTT brokers at the protocol level
None. MQTT clients run unchanged on any broker
None for core MQTT. The rules engine and bridges are EMQX-specific

Where CloudSignal Pulls Ahead

Both are MQTT brokers, so we focus on where the experience and economics actually diverge.

Predictable Monthly Pricing

EMQX Cloud bills on session-minutes, throughput, and feature add-ons, so a noisy device fleet or a spike in publishes can move your bill. CloudSignal charges flat monthly tiers, so your invoice is the same whether the network is busy or quiet.

AI Transport Built In

CloudSignal ships AI Transport, a drop-in transport for the Vercel AI SDK that streams tokens over MQTT and resumes after disconnects. EMQX has no comparable first-party AI product, so you would be wiring the streaming and resume logic yourself.

Application-First, Not IoT-First

EMQX is excellent if you are deploying to industrial IoT or operating large device fleets. CloudSignal is built for the engineer adding real-time messaging to a Next.js app, a mobile product, or an AI agent. Dashboard, onboarding, and SDKs all reflect that focus.

ACL Rules You Can Edit in the Dashboard

Both platforms enforce permissions at the broker. CloudSignal exposes ACL rule sets as a first-class dashboard surface, so a developer can audit and adjust policies without editing configuration files or shipping a new server build.

How to Decide

Pick the platform that matches your audience and deployment model, not just the feature list.

Choose CloudSignal when…

  • You are building application features and want flat, forecastable pricing
  • You need AI streaming over MQTT with offline resume out of the box
  • You want a developer-first dashboard with editable ACL rule sets
  • You are prototyping and want an unlimited-time free tier
  • You are wiring real-time messaging into a Next.js, mobile, or AI app

Choose EMQX when…

  • You need self-host, on-prem, or air-gapped deployment today
  • You operate millions of devices and need an in-broker rules engine
  • You require MQTT-SN, Sparkplug B, or other industrial protocols
  • You want bridges to Kafka, ClickHouse, or InfluxDB without a separate service
  • You already run EMQX open source and want consistent tooling in the cloud
MQTT, Flat Pricing, AI-Native.

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MQTT clients you already use will work without changes. Try the free tier in minutes, no credit card required.

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