Can I change my plan anytime?

Yes. Upgrades take effect immediately. Downgrades also happen right away, but if your usage exceeds the new plan, a grace period lets you reduce devices/rules/destinations before anything is disabled — newest items first.

See upgrading & downgrading for the full flow.

More in FAQ
Why is my device offline?
Online status is based on recent messages — here is how it works.
Why was my message dropped?
Dropped messages almost always mean a rate limit was hit.
Can I export my telemetry?
How retention works and how to get your data out.
Why isn't my telemetry being stored?
Realtime-only tiers and storage caps both stop persistence.
How is my storage calculated?
Storage scales with devices, tags, and publish frequency.
What is a "tenant"?
Your isolated account space that scopes all your data.