Side by side
Clarus vs Sigma Files
Both stand on tax compliance software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Paid API
Clarus combines calculation, certificates, licenses, and managed returns in one product suite. Its assisted filing and integration options target businesses with complex, multi-jurisdiction tax operations.
Visit Clarus Paid Web
Sigma Files combines nexus review, permit registration, and automated return filing in one service. Its monthly plans scale by state count, while registration is charged separately per state.
Visit Sigma FilesThe facts
| Clarus | Sigma Files | |
|---|---|---|
| Free plan | Not published | No |
| Open source | Not published | Not published |
| Runs on | API | Web |
| Lowest paid plan | Free or on request | Essential: $24.90 a month |
| Plans published | 3 | 5 |
| Maker | Clarus | Not published |
| Website | clarustaxtech.com | sigmafiles.com |
| On tax compliance software | #90 of 105 | #86 of 105 |
Clarus: what it does well
- Calculates tax across more than 13,000 US jurisdictions
- Supports Canadian tax calculation
- Automates certificate validation and renewal
- API and listed business-system integrations
- Managed monthly, quarterly, or annual returns
What to know first
- Pricing requires a customized quote
- API documentation requires a customer request
- Platform is listed as API
Sigma Files: what it does well
- Covers all 50 US states
- Handles registration and ongoing returns
- AI checks filings against updated state data
- Dashboard stores confirmations and filing records
- Reviews state flags with customers
What to know first
- Ongoing filing requires prior state registration
- Coverage is limited by plan
- Registration costs $149 per state
- No free plan
Alternatives to Clarus Alternatives to Sigma Files The whole list