Plan limit reference

Your plan sets these limits (see your exact numbers on Quota & limits):

Limit Controls
max_devices How many devices you can register
min_publish_interval_ms Minimum gap between a device's messages
max_tenant_msgs_per_sec Aggregate messages/sec across all devices
max_msgs_per_hour Per-device hourly cap (if set)
max_dashboards / max_widgets Dashboard and per-dashboard widget counts
max_rules Number of alerting rules
allowed_actions Which rule action types you can use
max_action_fires_per_month Monthly action-fire budget (0 = unlimited)
max_storage Telemetry storage in MB (0 = unlimited)
event_retention_hours How long events are kept
store_telemetry Whether history is stored at all (realtime-only tiers = false)
allowed_egress_types Which integrations you can use

For how the rate limits behave in practice, see understanding rate limits.