Side by side
ONESOURCE Sales & Use Tax Compliance vs OpenTax by Invaro
Both stand on ai tax software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Paid Web
ONESOURCE brings return preparation, validation, and filing support into a cloud-based tax compliance workflow. Prospective customers can request a free demo or contact a representative for pricing.
Visit ONESOURCE Sales & Use Tax Compliance Free plan APILinuxMac+3
OpenTax offers a free, no-expiry evaluation for tax computation with explicit rules and a refusal path for cases it cannot answer. Check the state coverage, request allowance, and telemetry details against your needs.
Visit OpenTax by InvaroThe facts
| ONESOURCE Sales & Use Tax Compliance | OpenTax by Invaro | |
|---|---|---|
| Free plan | Not published | Yes |
| Open source | Not published | Not published |
| Runs on | Web | API, Linux, Mac, Self-hosted, Web, Windows |
| Lowest paid plan | Not published | Free or on request |
| Plans published | None | 1 |
| Maker | Not published | Not published |
| Website | tax.thomsonreuters.com | opentax.invaro.ai |
| On ai tax software | #32 of 33 | #8 of 33 |
ONESOURCE Sales & Use Tax Compliance: what it does well
- More than 1,200 signature-ready returns across three jurisdictions.
- Electronic filing in 33 states plus Canada.
- Monthly updates for tax law and reporting changes.
- Integrates with major business systems and ONESOURCE products.
- No local software installation or server maintenance.
What to know first
- Paid product; pricing is on request.
- Requires internet access for cloud use.
OpenTax by Invaro: what it does well
- Supports individual, corporate, and fiduciary returns
- Rules include statutory citations and effective dates
- Can return proofs for offline verification
- Free evaluation has no expiry
What to know first
- Coverage spans 29 states and is growing
- Anonymous calls are limited to 600 requests an hour
- The CLI and MCP package sends an anonymous usage ping
Alternatives to ONESOURCE Sales & Use Tax Compliance Alternatives to OpenTax by Invaro The whole list