Sales Tax Software Compared: Prophit.ai vs Avalara (2026)

Prophit.ai vs Avalara, TaxJar, Vertex, and Anrok: flat $199/month plans compared on pricing model, use tax, included exemption certificates, filing workflows, and AI review.

Flat pricing per organization: $199/month Starter and $599/month Professional, with no per-state, per-filing, or per-transaction fees — plus a published à-la-carte module menu.
Sales-side and purchasing-side exemption certificate management are included in every plan, or standalone from $49/month per side.
AI-native since 2019: AI reads your documents, classifies every transaction for taxability, validates exemption certificates, and answers questions in-app — checked against published state rules, with a person approving every material decision.
Human review is a designed control: filing-ready outputs are approved by a reviewer, and unresolved facts fail closed instead of being guessed.
Marketplace-facilitator sales are recognized and treated distinctly from direct sales, so facilitator-collected tax is not double-counted.
Deliberately US-focused: United States sales and use tax done deeply, rather than global VAT done thinly.