Numerara is built and maintained by Alexander Polekha, an independent developer in Armenia.
The site does one thing: it applies a written set of numerology rules to a birth date and a birth name and shows every sum that produced the six numbers. There are no accounts, no saved charts and no readings. The rules, their page references and the places where published traditions differ are on How we calculate; the letter values are visible in the chart under your result.
That is the whole claim. Numerology is a tradition, not a science. Whether the numbers describe a person or predict anything is not something this site asserts, and the calculator is built so that you can check the arithmetic rather than take it on trust.
Numerara does not run a newsletter and has no user accounts. If something is wrong — a sum that does not follow the stated rule, a name that should have been accepted, an unclear sentence — use the contact form. Please do not include your name or birth date in a message; there is nothing we could check it against, and the form has no access to the calculator fields.
The design is a worksheet on purpose: thin rules, tabular numerals and one accent colour, so the numbers stay the loudest thing on the page.