Stripe Atlas Taxes - Help file your business taxes

Avalara - Cut tax compliance costs, not corners. Avalara automates tax compliance and can help improve accuracy while reducing costs.

Taxfyle - Stop doing your taxes, leave it to the professionals.

TaxJar - TaxJar simplifies sales tax filing for eCommerce sellers.

neo.tax - automated R&D tax credits for startups = extra month of burn

Vertex O Series - Centralize and streamline indirect tax management across the enterprise.