We rely on official provider sources wherever possible — especially pricing pages, plan-comparison pages, and support documentation.
Each calculator also shows the sources used for its important pricing and feature rules, together with the date they were last checked.
Why the dates matter#
Software companies can change prices, limits, and included features at any time. A verification date tells you when we last checked a source; it is not a guarantee that nothing has changed since.
For any purchase decision, use the calculator as a decision aid and confirm the final price and terms on the provider’s own website.