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send21 vs Payclave

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 Payclave
Detailsend21 logo send21Payclave logo Payclave
What it doesNon-custodial crypto payment links and API for people and AI agents Non-custodial crypto checkout where customers pay with any token and merchants receive USDC or USDT in their own wallet
StageNot given Startup
FoundedNot given 2026
Based inNot given US
Pricing modelPaid Freemium
PricingOne 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. Test mode: free. Live payments: 0.7% per completed payment. No monthly or setup fee.
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
  • Hosted checkout sessions for stablecoin payments
  • Direct settlement to merchant-controlled wallet
  • Independent onchain payment verification
  • Signed webhook notifications with retry delivery
  • JavaScript and React SDKs for integration
  • Separate test and live payment modes
  • Payment links, invoices, and API-based checkout creation
  • Dashboard with payment records and settlement wallet settings
  • API playground for testing checkout flows
What makes it differentNot given
  • Non-custodial: Payclave never holds funds or private keys; settlements go directly to the merchant's own wallet
  • Accept any token: customers pay with whatever supported token they already hold without bridging or swapping
  • Simple flat 0.7% pricing with no monthly fee, setup fee, or payout fee
  • Independent onchain verification before marking payments as complete
  • Developer-friendly with published API, SDKs, and comprehensive guides for integration and reconciliation
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)10 +4 (up) since last checkNot checked yet no change since last check
Trust Flow (Majestic)150
Citation Flow (Majestic)280
Referring domains (Majestic)352

4 details filled in for both companies.

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