What Is ISV (Independent Software Vendor)?

An ISV's core business is software, not payments, payment acceptance is a feature built into the product, not the product itself. That's the structural difference from a classic ISO, whose entire business is selling and supporting merchant processing accounts. The PayFac model is the mechanism most ISVs use to embed payments without becoming a full acquirer in their own right, letting sub-merchants inside the software start accepting cards without each one going through a separate, individual underwriting process.

The research behind this glossary found ISVs named as a distinct target buyer by three separate merchant-services appointment-setting vendors: Launch Leads, Pearl Lemon, and TopLead all list PayFacs and ISVs alongside classic ISOs and agents on their own service pages, evidence that appointment-setting demand in this niche extends beyond the traditional agent sales floor into software companies building payments into their own products.

That extension comes with a different buying motion. An ISV's appointment-buying decision is more likely feeding a partnerships or business-development conversation, integration talks, channel relationships, than staffing a direct merchant-facing sales floor the way an established ISO managing MLS agents does. The research found no competitor building a clearly separated, ISV-specific segment page or content track for this distinction, an open gap.