Best OpenSalesTax Alternatives in 2026
Updated
20 platforms from tax engine software ranked against OpenSalesTax on the same published basis.
- 1OpenSalesTax vs Vatstack
- 2OpenSalesTax vs Zamp
- 3OpenSalesTax vs Kintsugi
- 4OpenSalesTax vs Sovos Tax Determination
- 5OpenSalesTax vs Numeral
- 6OpenSalesTax vs ONESOURCE Certificate Manager
- 7OpenSalesTax vs Stripe Tax
- 8OpenSalesTax vs Avalara VAT Registration
- 9OpenSalesTax vs Quaderno
- 10OpenSalesTax vs Vertex e-Invoicing
- 11OpenSalesTax vs Anrok
- 12OpenSalesTax vs Sphere
- 13OpenSalesTax vs TaxCloud
- 14OpenSalesTax vs TaxJar
- 15OpenSalesTax vs Vertex VAT Compliance
- 16OpenSalesTax vs CCH SureTax
- 17OpenSalesTax vs ONESOURCE Determination
- 18OpenSalesTax vs CCH Tagetik
- 19OpenSalesTax vs Vertex for e-Commerce
- 20OpenSalesTax vs AkuCalc
OpenSalesTax alternatives compared
| # | Platform | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Vatstack | 7.4 | Free plan | $15/mo | API, Web |
| 2 | Zamp | 7.4 | Free plan | Free | API |
| 3 | Kintsugi | 7.2 | Free plan | $75/mo | API |
| 4 | Sovos Tax Determination | 6.9 | No | — | API, Web |
| 5 | Numeral | 6.8 | No | — | API |
| 6 | ONESOURCE Certificate Manager | 6.8 | No | — | API, self-hosted, Web, Windows |
| 7 | Stripe Tax | 6.8 | No | — | API |
| 8 | Avalara VAT Registration | 6.7 | No | — | API, Web |
| 9 | Quaderno | 6.7 | No | — | API |
| 10 | Vertex e-Invoicing | 6.7 | No | — | API |
| 11 | Anrok | 6.6 | No | $50/mo | API |
| 12 | Sphere | 6.6 | No | $100/mo | API |
| 13 | TaxCloud | 6.6 | No | — | API |
| 14 | TaxJar | 6.6 | No | $39/mo | API |
| 15 | Vertex VAT Compliance | 6.6 | No | — | API |
| 16 | CCH SureTax | 5.6 | No | — | — |
| 17 | ONESOURCE Determination | 5.5 | No | — | Web |
| 18 | CCH Tagetik | 5.2 | No | — | — |
| 19 | Vertex for e-Commerce | 5.1 | No | — | Web |
| 20 | AkuCalc | 5.0 | No | — | — |
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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 7.4 out of 10. The others here: Zamp, Kintsugi, Sovos Tax Determination 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 on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it.