Sigma Files
Prepares and files sales tax registrations and returns for all 50 US states using AI verification.
951 linking domains
Established
- For
- E-commerce businesses and sellers managing sales tax compliance across multiple US states
- Price
- From $24.90/mopricing page, read 2026-10-11 ↗
- Activity
- Activity not read yet
- Company
- Domain since 2026domain registered
- Runs as
- No-code
- register business for sales tax permits in any state
- prepare and file sales tax returns on state schedules
- verify filings against current state rules before submission
- Domain since2026domain registered
Figure and bar: visits/mo, estimate · year: online since
- #1
Avalara - Avi for Tax Research (AI Assistant)MCP · sign-in
Answers tax questions and classifies items for tax compliance using natural language processing.
2.6MActiveFrom $69/mo - #2
Clemta
Handles US business formation, banking setup, tax compliance, invoicing, and bookkeeping for new companies.
155kActiveFrom $29/mo - #3
TaxGPT (AI Tax Co-Pilot)
Answers tax questions with cited sources, drafts memos, and analyzes tax documents for accountants and tax professionals.
45.1kActiveContact sales - #4
Agicap
Centralizes bank and accounting data to forecast cash positions and automate payments and reconciliation.
31.2kActiveContact sales2016 - #5
Chargeflow
Automatically submits chargeback disputes and prevents fraudulent chargebacks for online merchants.
20.5kActiveFrom $0.20 per use2020 - #6
GlobalDatabaseMCP · sign-in
Verifies companies, owners and filed financials against official government business registries via search, API and CRM connectors.
12.1kActive—
What is Sigma Files?
Prepares and files sales tax registrations and returns for all 50 US states using AI verification. It is listed in the Atlas under Finance.
Who is Sigma Files for?
E-commerce businesses and sellers managing sales tax compliance across multiple US states
How much does Sigma Files cost?
Paid plans start at $24.90/mo, per Sigma Files's pricing page on 2026-10-11.
Is Sigma Files free?
No. Its pricing page showed no free plan on 2026-10-11.
Do people use Sigma Files?
Established.
What are alternatives to Sigma Files?
In Finance, by use: Avalara - Avi for Tax Research (AI Assistant), Clemta, TaxGPT (AI Tax Co-Pilot), Agicap, Chargeflow, GlobalDatabase.
Not quite it? Describe the job
betaFive tools from the Atlas that fit it, each judged against what you wrote.
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.