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
- 5OpenSalesTax vs Sovos Tax Determination
- 6OpenSalesTax vs Vertex e-Invoicing
- 7OpenSalesTax vs CCH SureTax
- 8OpenSalesTax vs ONESOURCE Certificate Manager
- 9OpenSalesTax vs ONESOURCE Determination
- 10OpenSalesTax vs Avalara VAT Registration
- 11OpenSalesTax vs Numeral
- 12OpenSalesTax vs Stripe Tax
- 13OpenSalesTax vs Cbox Tax
- 14OpenSalesTax vs Anrok
- 15OpenSalesTax vs Quaderno
- 16OpenSalesTax vs TaxCloud
- 17OpenSalesTax vs TaxJar
- 18OpenSalesTax vs Sphere
- 19OpenSalesTax vs Vertex for e-Commerce
- 20OpenSalesTax vs Vertex VAT Compliance
- 21OpenSalesTax vs CCH Tagetik
OpenSalesTax alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Vatstack | 6.9 | Free plan | $15/mo | API, Web |
| 2 | Zamp | 6.9 | Free plan | Free | API |
| 3 | Kintsugi | 6.6 | Free plan | $75/mo | API |
| 5 | Sovos Tax Determination | 6.3 | No | — | API, Web |
| 6 | Vertex e-Invoicing | 6.3 | No | — | API, Web |
| 7 | CCH SureTax | 6.2 | No | — | — |
| 8 | ONESOURCE Certificate Manager | 6.2 | No | — | API, self-hosted, Web, Windows |
| 9 | ONESOURCE Determination | 6.2 | No | — | Web |
| 10 | Avalara VAT Registration | 6.0 | No | — | API, Web |
| 11 | Numeral | 6.0 | No | — | API |
| 12 | Stripe Tax | 6.0 | No | — | API |
| 13 | Cbox Tax | 5.9 | No | — | self-hosted |
| 14 | Anrok | 5.8 | No | $50/mo | API |
| 15 | Quaderno | 5.8 | No | — | API |
| 16 | TaxCloud | 5.8 | No | — | API |
| 17 | TaxJar | 5.8 | No | $34.92/mo | API |
| 18 | Sphere | 5.7 | No | $100/mo | API |
| 19 | Vertex for e-Commerce | 5.7 | No | — | Web |
| 20 | Vertex VAT Compliance | 5.7 | No | — | API |
| 21 | CCH Tagetik | 5.6 | 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 6.9 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: documentation depth, a free tier and the platforms it runs on.