send21 vs PARROLI

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

send21 compared with PARROLI
Detail	send21	PARROLI
What it does	Non-custodial crypto payment links and API for people and AI agents	The credit card that pays you in real gold
Stage	Not given	MVP
Founded	Not given	Not given
Based in	Not given	US
Pricing model	Paid	Paid
Pricing	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.	Target APR 7.99%–9.99% for gold-backed credit; ~20%+ APR for card-only start; 2% annual Storage & Ownership Fee; 0% fee on one eligible gold purchase ($5k–$20k) for Founding Members; Gold Rewards: 5% on first $3,000 of eligible spending, then 3% up to $15,000 per year for five-year benefit period.
Key features	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	Invest in allocated physical gold stored in COMEX-approved vault Borrow up to 65% of gold value at 7.99%–9.99% APR Earn 1–5% physical gold rewards on card purchases Fully insured gold holdings through Lloyd's of London Gold redemption within 28 days or physical delivery Works as regular Visa/Mastercard worldwide Real-time gold valuations from Bullion Market pricing Ownership Certificate documenting allocated gold holdings Two entry paths: start with gold or start with card
What makes it different	Not given	Earn real physical gold on everyday card spending instead of cash back Use gold as collateral for lower-rate credit without selling it Card tier and credit line determined by gold holdings, not spending or fees Allocated gold held in your name with independent custody and property-rights protection Flexible entry: start with purchasing gold or applying for card first
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)	10 +1 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	15	0
Citation Flow (Majestic)	28	10
Referring domains (Majestic)	35	2

4 details filled in for both companies.

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