Thomson Reuters ONESOURCE vs Zamp
No clear leader: Zamp (52.3) and Thomson Reuters ONESOURCE (51.8) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.
Capabilities
Feature-by-feature on the axes that matter for tax software. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Thomson Reuters ONESOURCE
A comprehensive cloud solution that automates tax preparation, trade documentation, and financial reporting for accounting firms and companies, helping reduce compliance risks and operational costs.
Zamp
A platform that automates sales tax calculations, registrations, and filings across the US and Canada, backed by dedicated tax experts who manage compliance end-to-end.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Thomson Reuters ONESOURCE
Pricing not documented yet.
Zamp
Free tier with API sandbox and consultation. Paid plans available via custom quote.
- FreeFree
- One-time nexus analysis
- Jurisdiction-by-jurisdiction risk summary
- Product taxability review
- Taxability classification by product/service
- State and country-specific rule application
- +2 more
- U.S.Contact sales
- Rooftop-accurate tax calculations
- Real-time address validation
- Product-specific taxability rules
- Proactive nexus monitoring and registration
- Automated state registrations
- +6 more
- GlobalContact sales
- All U.S. plan features
- Canada GST/HST/PST/QST calculations
- Federal and provincial rate determination
- Buyer location validation
- Digital vs. physical product tax logic
- +5 more
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
- SAP
Thomson Reuters ONESOURCE
- QuickBooks Online
- Pagero
Zamp
- NetSuite
- Shopify
- Stripe
- WooCommerce
- Amazon
- Chargebee
- Checkout Champ
- eBay
- Etsy
- BigCommerce
- QuickBooks
- Rillet
- Recurly
- Sage Intacct
- Salesforce Commerce Cloud
- Zoho
Thomson Reuters ONESOURCE or Zamp: which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.