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send21 vs Alphathena

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 Alphathena
Detailsend21 logo send21Alphathena logo Alphathena
What it doesNon-custodial crypto payment links and API for people and AI agents The operating system for personalized portfolio management
StageNot given Not given
FoundedNot given Not given
Based inNot given US
Pricing modelPaid Contact for pricing
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. Platform fee based on AUM tier plus basis points on direct indexing assets. A TAMP typically charges 30 to 50 basis points on all AUM it manages, while Alphathena's platform fee model means you pay for the technology and direct indexing assets, not a percentage of all assets you manage. No 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
  • Over 2,000 benchmarks to track
  • Integration with Schwab, Fidelity, Clearstreet, Interactive Brokers, and Orion
  • Onboarding completed in as little as one week
What makes it differentNot given
  • Pure technology platform that keeps advisors in full control of investment decisions
  • No custodian switch required; clients' assets remain where they are
  • Agentic AI that generates actionable scenarios and handles complex workflows automatically
  • Powers over $10 billion in assets across advisory firms
  • Works alongside existing portfolio management systems without replacing them
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)6 +2 (up) since last check29 no change since last check
Trust Flow (Majestic)1515
Citation Flow (Majestic)2831
Referring domains (Majestic)3594

4 details filled in for both companies.

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