Avalara AvaTax
7.6#8 in tax compliance softwareFrom $699 a yearWebAPI
VisitAvalara AvaTax vs OpenSalesTax
OpenSalesTax
7.4#3 in tax engine softwareFree planFree planWebAPILinuxmacOS
VisitWhat both publish
| Fact | Avalara AvaTax | OpenSalesTax |
|---|---|---|
| API access | Yes | Authentication defaults to open access with per-IP rate limiting, while an API-key mode requires an X-API-Key header and supports per-key rate limits and usage tracking. |
| Purpose | AvaTax calculates tax in real time for sales and purchasing workflows across jurisdictions and tax types. | OpenSalesTax calculates how much sales tax to charge on US transactions using public data and per-state modules. |
Avalara AvaTax plans
- Core Compliance$79 a month
- Core Compliance + SST Services$69 a month
- CustomPriced on request
- Tax Calculation and Returns Compliance Package$699 a year
- Tax Calculation (AvaTax)Priced on request
- Core Compliance + SST Services Monthly$69 a month
OpenSalesTax plans
- Free / open sourceFree
- Free self-hosted engineFree
Pick Avalara AvaTax if…
AvaTax suits businesses that need tax calculations across multiple tax types, jurisdictions, and sales or purchasing systems. The listed audiences include small businesses, finance and accounting professionals, enterprise tax departments, developers, and partners.
Pick OpenSalesTax if…
OpenSalesTax suits developers or organizations building US transaction tax calculations who can self-host an API. Users should be prepared to verify calculations with the relevant state Department of Revenue before remitting.