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send21 vs Checkslip

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 Checkslip
Detailsend21 logo send21Checkslip logo Checkslip
What it doesNon-custodial crypto payment links and API for people and AI agents Bank slip verification API for transfer confirmation
StageNot given Not given
FoundedNot given Not given
Based inNot given TH
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. Free: 50 credits when phone number is verified. Paid plans: Pack 500 (500 THB, 1,800 credits), Pack 700 (700 THB, 2,700 credits), Pack 1,200 (1,200 THB, 4,800 credits), Pack 1,500 (1,500 THB, 6,400 credits), Pack 3,500 (3,500 THB, 16,000 credits), Pack 5,000 (5,000 THB, 24,000 credits), Pack 10,000
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
  • QR code and slip image verification
  • Bank transaction lookup with reference number, date/time, and amount
  • Sender and recipient bank names and abbreviated names
  • Last 4 digits of account numbers
  • Webhook delivery of results
  • Idempotency key for duplicate request handling
  • Does not store slip images
  • Credit charging only when bank confirms transaction
  • Automatic re-checking for pending transactions
  • Multiple credit pack options from 500 to 50,000 THB
What makes it differentNot given
  • Real-time verification directly from source bank records
  • Does not store or log slip images for privacy
  • Supports duplicate request detection without re-charging
  • Free trial with 50 credits upon phone number verification
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 +1 (up) since last checkNot checked yet no change since last check
Trust Flow (Majestic)150
Citation Flow (Majestic)280
Referring domains (Majestic)350

4 details filled in for both companies.

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