send21 vs uSMART SG

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 uSMART SG
Detail	send21	uSMART SG
What it does	Non-custodial crypto payment links and API for people and AI agents	Smart Trading Easy Investing
Stage	Not given	Established
Founded	Not given	Not given
Based in	Not given	SG
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.	US stocks: from USD $0 commission. SG stocks: from 0.020% of transaction amount. HK stocks: from 0.024% of transaction amount. US options: USD $0 commission per contract, USD $0.40 platform fee per contract (no minimum fees). Futures: USD $0 platform fees, commissions from USD $0.99.
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	Zero commission US stock trading Free real-time Level 2 US market data with 60 levels Fractional shares trading from USD $1 11 advanced order types including Grid Trading Regular savings plan for automated investing Multiple options trading strategies 24/5 trading for index options (SPX, VIX, XSP) Daily stock picks and featured strategies Community learning zone with educational resources
What makes it different	Not given	Zero commission on US stocks and options with transparent fee structure Advanced intelligent trading tools like Grid Trading and automated order types Free lifetime real-time Level 2 market data with 60 levels of depth Fractional shares trading from just USD $1 for portfolio diversification Near 24-hour index options trading and regulated by MAS
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 +4 (up) since last check	35 no change since last check
Trust Flow (Majestic)	15	18
Citation Flow (Majestic)	28	32
Referring domains (Majestic)	35	115

4 details filled in for both companies.

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