Can we use our own esign vendor?

Hi guardian604,

Thanks for reaching out here.  Welcome!  Capturing signatures in the QuickBooks Online app provides the option for your customers to sign estimates or invoices from anywhere at anytime with DocuSign.  If you'd prefer to integrate with a different vendor you can review other apps for the best fit for your business.

For additional assistance, please don't hesitate to contact us.  We'd be pleased to have the opportunity to work with you directly and ensure we're on the right track with your QuickBooks goals.

Schedule a Callback or start a Chat: click (?) Help in the upper right in QuickBooks Online > enter "Contact support" > hit Contact Us > provide a brief summary of your situation > hit Let's Talk > choose Get a callback or Start a Chat.
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If you have any other questions, feel free to reach back out.  We're here for you!