Tax intelligence, where your data lives
KnotTheory.ai builds intelligent tax software — from the agentic cloud platform CPA firms run their practice on, to on-device tax apps that never upload your documents.
A tesseract is a cube in four dimensions. Get a four-dimensional view of your taxes — collect, extract, estimate, file.
For CPA firms, their clients, and individual filers: platform.knottheory.ai
Our Tax Products
One family of tax intelligence — cloud for firms, on-device for individuals and businesses.
Tesseract Tax Cloud New
The agentic tax platform for CPA firms, their clients, and individual filers — AI document extraction, live estimates with cited research, e-signatures, and accounting connectors. Live at platform.knottheory.ai, with native iOS and Android apps.
Tesseract-Tax™
Tax document collector for macOS and iOS — now supporting 8 countries. Scan, import, and organize tax forms with on-device extraction, AI chat, and country-specific tax estimation.
Tesseract-CorpTax
Corporate tax organizer for S-Corps, C-Corps, and LLCs — entity-aware document collection, extraction, and estimation that runs on your own hardware, not ours.
Why KnotTheory for Tax?
Tax documents are the most sensitive files you own. We treat them that way.
Privacy by Architecture
On-device apps never upload your documents. Cloud AI processing runs with zero data retention — never stored, never used for training. Your financials stay yours.
Agentic Extraction
W-2s, 1099s, K-1s, brokerage statements — our AI reads the form the way a preparer does: spatially, field by field, with the tax code in mind.
Built for the Full Return
From document collection to live estimates with cited research to e-signatures — through direct e-file with the IRS. KnotTheory.ai Inc. is an Authorized IRS e-file Provider.
Complex Taxes, Simple Price
AI does the heavy lifting that traditional prep bills by the hour. Multi-state moves, K-1s, stock compensation, side businesses — complicated tax situations handled for a fraction of what they used to cost.
Get in Touch
CPA firm, individual filer, or questions about our apps — we'd love to hear from you.