Kintsugi is an API-based sales tax compliance service from a company founded in 2022 and headquartered in San Francisco.
Alternatives to ONESOURCE Determination
ONESOURCE Determination is built for business tax teams handling global indirect tax. It calculates sales tax, use tax, GST, VAT, and excise tax across more than 205 countries and territories and over 60,000 jurisdictions. Real-time rates, rules, and calculation logic feed high-volume processing, while pre-built and custom connections cover ERP, financial, billing, e-commerce, POS, and payment systems. Reporting, analytics, exemption-certificate management, and certified…
TaxBandits handles electronic filing for payroll and employment forms, including 1099, W-2, 94x, ACA 1095, W-9, and BOI reports.
Tax1099 is an IRS-authorized e-filing and compliance platform for informational returns and other compliance data, offered on the web and through an API.
- 4
LOVAT
LOVAT provides tax and compliance tools for businesses selling across borders, covering VAT, sales tax, EPR, tax registration, marketplace tax, and e-invoicing.
Free planAndroidiOSWebAPI8.5From €27 a month - 5

Numeral
Numeral is an API-based tax service for businesses handling sales tax, VAT, and GST.
Free planWebAPI8.2Free plan - 6
Taxmo
Taxmo is UK bookkeeping and tax software for sole traders, freelancers, contractors, expats, and small businesses.
Free planAndroidiOSWebAPI7.8From £9.99 a month - 7
Oracle Fusion Cloud Expenses
Oracle Fusion Cloud Expenses is paid expense management software for handling reports, approvals, audits, reimbursements, travel authorization, and cash advance requests.
AndroidiOSWebAPI7.7 - 8

Avalara AvaTax
Avalara AvaTax calculates tax in real time for sales and purchasing workflows, with support for sales tax, consumer use tax, VAT, communications tax,…
WebAPI7.6From $699 a year - 9
UFile
UFile prepares Canadian personal tax returns for employment, retirement, rental, investment, and self-employment income.
Free planWebWindows7.6C$20.95 one-time - 10
Auris Tax Compliance
Auris Tax Compliance calculates, files, and tracks federal, state, and local payroll taxes.
AndroidiOSWeb7.6From $89 a month - 11
TaxCalc
TaxCalc is a UK accounting platform for tax compliance, client management and practice operations.
LinuxmacOSWindows7.3 - 12

Zamp
Zamp is a sales tax service with API access, automated filing, return preparation, submission, and direct ACH remittance.
Free planAPI7.2Free plan - 13
GSTZen
Free planWebAPI7.2Free plan - 14
7.1From €150 a year - 15
ADP Workforce Now
ADP Workforce Now is a web and mobile payroll and HR platform presented for organizations with 50–999 and 1,000 or more employees.
AndroidiOSWeb7.1 - 16

Stripe Tax
Stripe Tax calculates and collects sales tax, VAT and GST through an integration, and provides reporting for businesses that file their own returns.
API7.0 - 17
Sovos VAT Compliance
Sovos VAT Compliance brings together tools for local VAT obligations, from e-invoicing mandates to periodic returns.
WebAPIExtensionWindows7.0 - 18

Alphatax
Alphatax is tax compliance software covering corporate tax, VAT, tax provisioning, and Pillar Two reporting.
WebAPIWindows7.0 - 19

Aatrix eFile
Aatrix eFile helps organizations prepare and submit year-end tax filings using payroll or HR data.
WebmacOSWindows7.0From $119 a year - 20
GSTHero
GSTHero is GST compliance software for businesses, tax professionals, and corporate teams.
WebAPIWindows6.9 - 21
Tax Series
Tax Series is web-native corporate tax software for managing corporate income tax processes, with a shared database that reuses information across tax work.
WebAPI6.9 - 22
CCH SureTax
CCH SureTax is a sales and use tax automation platform for retailers and brands selling through multiple channels.
API6.8 - 23
ProFile T2
ProFile T2 is Windows desktop software for preparing corporate T2/CO-17 tax returns.
Windows6.8From $1,190 a year - 24
Symmetry Tax Engine
Symmetry Tax Engine calculates gross-to-net payroll taxes for teams building, embedding, or scaling payroll platforms.
WebAPILinuxmacOS6.7 - 25
Clear GST
WebAPI6.6From $1,000 a year - 26

ExpressGST
WebAPI6.6 - 27
Inprout
WebAPI6.6From ₹1,599 a month - 28
CCH Integrator Indirect Tax
CCH Integrator Indirect Tax is a web-based, cloud-delivered solution for businesses coordinating GST, VAT, and other indirect tax work across countries.
Web6.5 - 29
Vertex O Series for Communications
WebAPISelf-hosted6.5 - 30
ONESOURCE Certificate Manager
ONESOURCE Certificate Manager automates the collection, validation, storage, and renewal of sales tax exemption certificates.
WebAPISelf-hostedWindows6.5


