TaxJar - TaxJar simplifies sales tax filing for eCommerce sellers.
Octobat - Octobat provides automated tax-compliance and accounting for digital businesses.
Avalara - Cut tax compliance costs, not corners. Avalara automates tax compliance and can help improve accuracy while reducing costs.
Thomson Reuters ONESOURCE - ONESOURCE tax software and solutions synchronize every aspect of your work and link international, country, state and local tax laws.
VatStack - Simplify VAT & GST for your digital business.
Vertex Cloud - Vertex Cloud offers sales and use tax automation solutions.