USDPAY vs send21

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

USDPAY compared with send21
Detail	USDPAY	send21
What it does	Non-custodial USDT payment gateway where funds go directly to your wallet	Non-custodial crypto payment links and API for people and AI agents
Stage	Not given	Not given
Founded	Not given	Not given
Based in	US	Not given
Pricing model	Freemium	Paid
Pricing	Free plan: $0 per month + 0.9% per confirmed payment. Pro plan: $29 per month + 0.5% per confirmed payment.	One fee per payment: 0.49% on $0-$10, 0.39% on $10-$50, 0.29% on $50-$100, 0.19% on $100-$500, 0.14% on $500-$2,000, 0.09% on $2,000-$10,000, 0.04% on $10,000-$50,000, 0.02% on $50,000-$100,000, 0.01% above $100,000. Minimum $0.01, maximum $100. No subscription, setup fee or monthly minimum.
Key features	Hosted payment checkout page Payment links REST API for invoice creation Support for BEP20, TON and TRON TRC20 networks Instant payment webhooks AML wallet screening Multi-wallet support Unlimited invoices On-chain payment confirmation	REST API with scoped keys and batch drafts up to 25 per call Support for Bitcoin PSBT and batching wallets like Safe No KYC required, encrypted email storage only Idempotency keys for safe retries Shopify connection with custom app and setup help Fee collected separately on Ethereum and EVM chains via Safe batching
What makes it different	Non-custodial: funds go directly to merchant wallet, never held by USDPAY Transparent pricing with no setup or payout fees Multiple blockchain networks for cost flexibility Optional AML screening for risk assessment	Not given
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	25 no change since last check	6 +2 (up) since last check
Trust Flow (Majestic)	18	15
Citation Flow (Majestic)	21	28
Referring domains (Majestic)	34	35

4 details filled in for both companies.

More alternatives to USDPAY More alternatives to send21