How we research

Sources we use

Vendor pricing pages and help-center articles.
Vendor program terms (for our own affiliate disclosures).
Third-party pricing guides, only when the vendor page cannot be read, and always labelled.

What we do not do

We do not claim hands-on testing. We have not set up accounts to test these products.
We do not give star ratings, scores or "winners".
We do not publish promo codes unless a vendor publishes them openly and allows it.

Prices

Every price has a "last verified" date. A small script on each page marks figures older than 90 days as "may be outdated". The confidence label next to each source says whether it is vendor-published, a vendor page seen through a search excerpt, third-party, or a note that sources conflict (as for Sender's entry price).

Corrections

Spotted a wrong number? Email gb1@mail.grokbot.com with the vendor URL and we will update the page and its date.

Questions or corrections: gb1@mail.grokbot.com. Prices change often; always confirm on the vendor's own page before you buy.