Best ISO / Merchant Services Resellers (and How to Vet One)
ISOs (Independent Sales Organizations) resell another processor's network — typically Fiserv, Worldpay, TSYS, or Elavon — under their own brand. The model isn't inherently bad: most US merchants are on an ISO without realizing it. What matters is the markup, the contract, and how the rep handles statement disputes. The ISOs ranked here are ones we've seen produce defensible interchange-plus pricing without three-year handcuffs. ISOs not on this list are not necessarily bad, but they are also not vetted.
- 1National Processing8.2/10
Interchange-plus ISO with low monthly fee and strong restaurant pricing.
Pricing: Interchange + 0.14% + 7¢ (restaurants)Contract: month-to-month✓ Industry-specific public pricing — rare for an ISO✗ Smaller brand vs. Stripe/Square - 2Talus Pay6/10
Mid-market ISO with strong Clover integration and a focus on professional services.
Pricing: Interchange + 0.20% + $0.10Contract: varies✓ Interchange-plus pricing on most direct accounts✗ Pricing varies dramatically by which agent you sign with - 3Maverick Payments6.7/10
California-based ISO with white-label payments tooling for SaaS and ISVs.
Pricing: Interchange + 0.25% + $0.10 (direct)Contract: month-to-month✓ Strong embedded-payments / PayFac-as-a-service offering✗ Best-fit is SaaS / ISV partnerships, not standalone SMBs - 4
Cleveland-based ISO with broad SMB footprint and mixed pricing transparency.
Pricing: Quoted (request interchange-plus)Contract: 3-year✓ 24/7 phone support included✗ Default contract runs 3 years with ETF - 5SignaPay6.5/10
Texas-based ISO known for cash-discount and dual-pricing programs.
Pricing: Interchange + 0.25% + $0.10 (or surcharge model)Contract: varies✓ Mature cash-discount / dual-pricing program✗ Cash discount works poorly in customer-facing service verticals - 6Riverside Payments3.3/10
Vancouver, WA-based ISO with aggressive sales process and high effective rates.
Pricing: Quoted (often 0.15% qualified, much higher effective)Contract: 3-year✓ Easy approval for most SMBs✗ 3-year contract with $495 ETF - 7Moneris (US)6.3/10
Canadian acquirer with limited US operations — listed for cross-border merchants.
Pricing: Quoted (interchange-plus on most plans)Contract: varies✓ Single-acquirer relationship for US/Canada cross-border ops✗ US-only merchants will find better pricing elsewhere
Bottom line
If an ISO rep is in your office: ask for interchange-plus pricing in writing, a month-to-month or 1-year contract maximum, no early termination fee, and a written statement of all monthly fees. If they refuse any of these, you don't have a deal — you have a sales pitch. The names on this list will usually agree to those terms because they have to compete with Helcim and Stax for transparent merchants. Always get a free statement review before signing — we'll mark up the proposed contract against your current statement so you see exactly what changes.
Head-to-head comparisons
Direct comparisons between the top-ranked processors on this list.
Fees that affect this category
Definitions, typical ranges, and how to negotiate them.
- Dual-Pricing / Cash Discount Program Fee$20 to $50 per month
- SurchargingUp to 3% on credit cards (network rule)
- Processor Markup0.15% + 5¢ (best-in-class) to 1.50% + 25¢ (poorly-negotiated tiered)
- Effective Rate1.80% (best-case low-risk) to 4.00%+ (poorly-priced tiered)
- Interchange Downgrades0.20%–0.80% extra cost per downgraded transaction