Avalara AvaTax vs Complyt

Avalara AvaTax calculates tax in real time for sales and purchasing workflows. It covers sales tax, consumer use tax, VAT, communications tax, occupancy and lodging tax, and excise tax, and supports automated return filing and tax registration. Address validation uses geospatial technology to match transactions to tax regions rather than relying on ZIP codes. AvaTax connects with ecommerce, ERP, accounting, sales, and purchasing systems, and its REST API supports calculation, document modification, and address validation. Product taxability codes, AI-assisted item classification, custom rules, exemption certificate management, and jurisdiction-specific tax research support tax decisions. Reporting includes dashboards, natural-language search, and audit-ready trails. The service is available through web and API, with integrations including Shopify, NetSuite, QuickBooks, SAP, and Salesforce. Core Compliance costs $79 per month; Core Compliance + SST Services costs $69 per month for qualifying sellers. Qualified sellers may receive state-funded services in up to 25 states. Pricing also varies by plan and transaction volume.

Complyt is an API and web sales tax engine for business transactions. Its API accepts line items, shipping addresses, transaction status, and related details, then returns a calculated tax amount and applicable rate. The US rate endpoint currently supports supplied addresses in the United States, while documentation describes VAT and global tax for international transactions. Customer records can be classified as retail, reseller, or marketplace, and those categories can affect taxability and nexus thresholds. Complyt distinguishes estimates, which do not count toward nexus thresholds, from invoices, which do. It offers nexus monitoring and an exemptions endpoint for exempt customers. Address Validation checks US addresses against official postal databases and returns suggested matches with confidence scores. Xero integration calculates line-level US sales tax using jurisdiction, nexus, exemptions, and product type; Xero tax calculation requires a US shipping or billing address. API access uses a client ID and secret to obtain a bearer token that expires after 24 hours. Pricing is on request.