Real-Time Messaging. Secured Before It Reaches Your App.
Notifications, AI chat, presence, and push — with broker-level access control baked in. Not bolted on.
What will you build?
Drop-in SDKs for the most common real-time features
Why Developers Choose CloudSignal
Reliability, offline, and access control — built into the protocol.
Native QoS
Delivery guarantees at the protocol level — fire-and-forget, at-least-once, exactly-once. No retry SDK needed.
Native Offline Queuing
Clients disconnect? Messages queue automatically and deliver on reconnect. No extra infrastructure.
Broker-Level ACL
Access control enforced before messages reach your app. Not in middleware. Not in your code.
Open Protocol
MQTT is an ISO standard. Your code works with any broker. No proprietary SDK lock-in.
Built for AI Agents
Lightweight binary protocol, persistent connections, topic-based routing — exactly what multi-agent systems need.
Retained State
New subscribers get the latest value instantly. No extra API call. No state store to manage.
Security at the protocol level
Other platforms make you wire up auth yourself. CloudSignal plugs into your existing identity provider and enforces access rules at the broker — before a message ever reaches your app. No auth stack? We've got you covered.
- Bring your own auth — Supabase, Auth0, Clerk, Firebase, or any JWT provider
- No auth provider? Built-in token authentication with automatic expiry
- Dynamic ACL policy editor — set per-topic rules with identity variables
- Identity-bound topics — scope access by email, user_id, or agent_id
- TLS encryption on all connections
// ACL v2 Policy { "version": "2.0", "default_action": "deny", "rules": [{ "topic": "/{email}/inbox", "action": "subscribe", "effect": "allow" }] }
Set up in a prompt
Tell your coding agent what you need. It handles the rest.
Simple Pricing. No Surprises.
Start free, upgrade when you're ready. No credit card required.
Starter
Free forever. Build and test without limits.
- 50,000 messages/month
- 25 concurrent connections
- MQTT 3.1.1 & 5.0
- TLS encryption
- Self-service docs
Pro
For developers going to production
- 500,000 messages/month
- 200 concurrent connections
- JWT authentication
- 7-day data retention
- Email support (48h SLA)
- Webhooks & integrations
- Soft limits — never lose a message
Scale
For teams scaling with real users
- 5M messages/month
- 2,000 concurrent connections
- OAuth/OIDC integration
- 30-day data retention
- Email support (24h SLA)
- Onboarding assistance
- EU & US data residency
Need custom volume? Contact us →
Start building real-time. Secured from day one.
Free tier. No credit card. Connect your first app in under 5 minutes.
Questions?