Best OpenSalesTax Alternatives in 2026
Updated
20 apps from tax engine software ranked against OpenSalesTax on the same published basis.
- 1OpenSalesTax vs Vatstack
- 2OpenSalesTax vs Zamp
- 3OpenSalesTax vs Kintsugi
- 4OpenSalesTax vs CCH SureTax
- 5OpenSalesTax vs ONESOURCE Determination
- 6OpenSalesTax vs Sovos Tax Determination
- 7OpenSalesTax vs Numeral
- 8OpenSalesTax vs Vertex e-Invoicing
- 9OpenSalesTax vs Vertex for e-Commerce
- 10OpenSalesTax vs Vertex VAT Compliance
- 11OpenSalesTax vs CCH Tagetik
- 12OpenSalesTax vs ONESOURCE Certificate Manager
- 13OpenSalesTax vs ShipVAT
- 14OpenSalesTax vs VAT Engine
- 15OpenSalesTax vs VATCalc Calculator
- 16OpenSalesTax vs AkuCalc
- 17OpenSalesTax vs Avalara VAT Registration
- 18OpenSalesTax vs Cbox Tax
- 19OpenSalesTax vs CereTax
- 20OpenSalesTax vs Complyt
OpenSalesTax alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Vatstack | 6.4 | Free plan | $15/mo | API, Web |
| 2 | Zamp | 6.4 | Free plan | Free | API |
| 3 | Kintsugi | 6.3 | Free plan | $75/mo | API |
| 4 | CCH SureTax | 5.4 | No | — | — |
| 5 | ONESOURCE Determination | 5.4 | No | — | Web |
| 6 | Sovos Tax Determination | 5.4 | No | — | API, Web |
| 7 | Numeral | 5.3 | No | — | API |
| 8 | Vertex e-Invoicing | 5.2 | No | — | API, Web |
| 9 | Vertex for e-Commerce | 5.2 | No | — | Web |
| 10 | Vertex VAT Compliance | 5.2 | No | — | API |
| 11 | CCH Tagetik | 5.1 | No | — | — |
| 12 | ONESOURCE Certificate Manager | 5.1 | No | — | API, self-hosted, Web, Windows |
| 13 | ShipVAT | 5.1 | No | — | Web |
| 14 | VAT Engine | 5.1 | No | — | Web |
| 15 | VATCalc Calculator | 5.1 | No | — | Web |
| 16 | AkuCalc | 5.0 | No | — | — |
| 17 | Avalara VAT Registration | 5.0 | No | — | API, Web |
| 18 | Cbox Tax | 5.0 | No | — | self-hosted |
| 19 | CereTax | 5.0 | No | — | Web |
| 20 | Complyt | 5.0 | No | — | Web |
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Questions about OpenSalesTax alternatives
What is the best alternative to OpenSalesTax?
Vatstack, number 1 in tax engine software with a score of 6.4 out of 10. The others here: Zamp, Kintsugi, CCH SureTax and 16 more.
What is the best free alternative to OpenSalesTax?
Vatstack is the best-ranked alternative with a free plan. 3 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.