Symmetry - Symmetry offers software solutions for payroll witholding tax.
TaxJar - TaxJar simplifies sales tax filing for eCommerce sellers.
Sovos Compliance - True Confidence for a Regulated World
Quaderno.io - Quaderno for Stripe is the simplest way to bill your customers without programming a single line of code.
Taxify - Taxify is a sales tax platform for eCommerce.
Avalara - Cut tax compliance costs, not corners. Avalara automates tax compliance and can help improve accuracy while reducing costs.