Expense & AP Fraud Detection

Tools built for accounts payable and expense reports that catch duplicate invoices, inflated reimbursements, and fake receipts, adjacent to payroll fraud and often run by the same finance team.

Editor's Pick

Ramp

Free corporate cards, expense, and bill pay, with AI that reads every expense for fraud

The core platform, corporate cards, expense management, and bill pay, is free: $0 per user, no SaaS subscription. Ramp earns on card interchange and optional paid tiers (Ramp Plus and Enterprise add controls like custom approval logic and deeper integrations, quoted per company). The fraud and policy controls live in the free tier, not behind an upsell.8.4/10

BILL

The SMB accounts-payable standard, with the vendor and W-9 controls that make AP fraud hard

Per-user monthly across four tiers: Essentials $49, Team $65, Corporate $89 (the popular tier, adding custom approval policies and two-way PO matching), and custom Enterprise. AR automation is available alongside AP. No free tier, this is a paid workflow platform, not a free spend tool like Ramp.7.8/10

Trustpair

Checks that the bank account you're paying actually belongs to the vendor you think it does

Enterprise-only custom packages: platform access plus a contracted number of vendor evaluations and account validations per year. No self-serve tier — contact the vendor for current pricing; reported entry points sit in the low-to-mid five figures annually, which mid-market buyers regularly find sized above their needs. Liability coverage up to $1M on validated payments is part of the newer US packaging.7.7/10

AppZen

AI that reads every expense report and invoice before you pay it

Reported starting price around $5,000/month, scaling with volume and modules. Enterprise-oriented, custom quotes only.7.5/10

Stampli

Invoice-centric AP automation, with the approval and duplicate controls built around the invoice

Quote-based, Stampli doesn't publish prices, contact the vendor for current pricing. Positioned mid-market, so expect a per-user or per-volume subscription that sits above the free tools and below enterprise audit platforms. Confirm scope and price directly.7.5/10