Avalara is ranked 1st in Tax Management Software while Vertex Indirect Tax O Series is ranked 6th in Tax Management Software. Avalara is rated 9.0, while Vertex Indirect Tax O Series is rated 0.0. The top reviewer of Avalara writes "Ensures customers with valid exemption certificates are not charged tax". On the other hand, Avalara is most compared with TaxJar and Taxify, whereas Vertex Indirect Tax O Series is most compared with .
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