Methodology & disclosure

Every price on StackPrice is copied from the vendor's official pricing page, which is linked on each tool page together with the date we last checked it.

A script re-opens each pricing page in a headless browser, saves a dated text snapshot (reading graphics with OCR where a page draws prices as images), extracts plan prices, and compares them with the previous snapshot. When something changes it is logged and reviewed before it appears on the price-change page.

When a vendor does not publish a number, we say unknown rather than guess. Calculator results are estimates based on list prices and simplified counting rules.

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