Sigil One is operated by Dylan Fratangeli. For questions or concerns, contact sigilonehq@gmail.com.
Sigil One is a tax exposure modeling tool. It allows you to manually enter data about a potential crypto sale, review the estimated tax exposure under the assumptions you provide, and export that scenario as a CPA-ready worksheet.
Sigil One is not tax filing software. It does not generate tax forms, file returns, populate government documents, provide tax advice, or connect to wallets or exchanges. All input is manual. The estimates produced are based entirely on assumptions you enter and may not reflect your actual tax liability.
Creating and reviewing snapshots is free. Exporting a snapshot or holdings report costs $29 per export. Payments are processed by Stripe and are non-recurring — there is no subscription.
You own the data you enter. We store it to provide the service. You may request deletion at any time by contacting us.
Sigil One is provided as-is. We make no guarantees about the accuracy of any estimate or the suitability of any export for a particular tax situation. You are responsible for verifying all information with a qualified tax professional.
We may update these terms. Continued use of the service after changes constitutes acceptance.