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An IoT backend — MQTT broker, API, and a small database — is lightweight and always-on, which makes it a perfect fit for a budget VPS.

What an IoT backend needs

  • MQTT broker (Mosquitto) — a few MB of RAM, handles thousands of messages.
  • A small database (InfluxDB, SQLite, or Postgres) for telemetry.
  • A public IPv4 so devices anywhere can connect.

The pick: RackNerd 1GB

RackNerd’s 1 GB plan at $21.99/yr runs Mosquitto, Node-RED, and a time-series database together, with full root and a dedicated IPv4. It’s always-on and cheap enough to dedicate to one project.

Typical stack

sudo apt install -y mosquitto mosquitto-clients
sudo systemctl enable --now mosquitto
  • Require TLS and authentication on the broker — unsecured MQTT on the public internet gets abused.
  • Store time-series data efficiently — InfluxDB or TimescaleDB beat a raw SQL table.
  • Expose only what’s needed — keep device management behind a VPN or firewall.

Bottom line: IoT backends are tiny but need to run 24/7. A 1 GB KVM VPS is the sweet spot for cost and reliability.

See RackNerd's current deals