Read-only, and an export is always enough
QuickBooks Online and Odoo connect directly, and both only read. Every other system works through an order history export, and an export works just as well. It is also how you can test the whole thing before connecting anything.
No order, quote or record is created or changed in your system. Allodial never writes to QuickBooks or Odoo.
Connects directly
LiveEach of these has its own page describing exactly which fields it reads.
Works through an export
ExportEvery other system works through a standard order history export, CSV or Excel, loaded on Imports. The same file runs the free check. Nothing touches the system itself.
Running P21, Eclipse or something else? Every system can export the report the check needs. See the export guides.
Test it before you connect anything
Export two years of sales by customer by month and the free check will show you which accounts went quiet, when each one last ordered normally, and what each of them was worth to you. It runs in your browser, so the file does not leave your machine.