Which accounts payable add-ons are known for configurable workflows and API availability with existing accounting systems?

A few AP add-ons are especially known for configurable approval/workflow automation and API integrations with popular accounting systems:

• Bill.com

  • Strong workflow/approval routing
  • Broad integrations with QuickBooks, Xero, NetSuite, Sage, and others
  • Good API support for custom integrations

• AvidXchange

  • Highly configurable AP workflows and approval chains
  • Integrates with many mid-market ERPs/accounting systems
  • API/partner integration options available

• Tipalti

  • Very configurable end-to-end AP workflow automation
  • Robust API and integration capabilities
  • Works with major accounting/ERP platforms like NetSuite, QuickBooks, Xero, etc.

• Ramp Bill Pay

  • Workflow approvals with customization
  • Integrates with QuickBooks, Xero, and NetSuite
  • API/integration support is growing, especially in modern finance stacks

• Melio

  • Simple approval workflows
  • Integrates with QuickBooks and Xero
  • API availability is more limited than the larger enterprise tools, but it’s commonly used with existing accounting systems

• MineralTree

  • Configurable AP automation workflows
  • Integrations with accounting systems/ERPs
  • API and integration support for deeper connections

If you want, I can also narrow this down by:

1. SMB vs mid-market vs enterprise, or
2. which ones integrate best with QuickBooks, Xero, or NetSuite.