Emitter
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Start | free forever · 1 GB data transfer · 50 unique devices · storage coming soon | Free |
| Scale | $10 per month · 15 GB data transfer · $1.00 per extra GB · 500 unique devices · $0.10 per extra 100 · storage coming soon | $10 a month |
As emitter.io lists them, read 9 Oct 2026. The maker's own page has the final word.
Facts from Emitter's own pages
- Deployment
- Emitter can be deployed as a Docker container or built and run from source; the maker describes single-server and clustered deployment. · emitter.io, 9 Oct 2026
- Filtering and playback
- Subscribers can filter messages, and messages can be stored for a period of time and delivered on demand. · emitter.io, 9 Oct 2026
- Limits
- The pricing page lists 1 GB transfer and 50 unique devices on Start, and 15 GB transfer and 500 unique devices on Scale, with extra usage priced separately for Scale. · emitter.io, 9 Oct 2026
- Message size
- The repository documentation lists a default maximum message size of 64 KB. · github.com, 9 Oct 2026
- Messaging
- Publishers send messages to channels, and subscribers receive copies in real time. · emitter.io, 9 Oct 2026
- Open source
- The download page says Emitter is free and open source under the AGPL license, and also offers a commercial license. · emitter.io, 9 Oct 2026
- Product
- Emitter is a real-time publish-subscribe messaging service for connecting online devices. · emitter.io, 9 Oct 2026
- Protocols
- Emitter supports MQTT and binary or text messages over WebSockets. · emitter.io, 9 Oct 2026
- Reliability
- The maker describes the system as peer-to-peer with no master or slave nodes, designed to continue operating if a node fails. · emitter.io, 9 Oct 2026
- Security
- The maker says Emitter supports per-channel authorization policies and SSL/TLS, encrypts network traffic, and does not inspect messages. · emitter.io, 9 Oct 2026
- Support
- The maker offers support contracts and directs questions to [email protected] and GitHub issues. · emitter.io, 9 Oct 2026
- Use cases
- The maker describes Emitter for gaming, IoT, web applications, dashboards, visual analytics, and mobile apps. · emitter.io, 9 Oct 2026
Where Emitter stands on Freedom251
- Chat APIs#7 of 32