Paywall Parity vs send21

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

Paywall Parity compared with send21
Detail	Paywall Parity	send21
What it does	Set your price once. Price every market intelligently.	Non-custodial crypto payment links and API for people and AI agents
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Paid
Pricing	Not given	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.
Key features	Pricing recommendations based on World Bank PPP data and local price levels Strategy presets: Conservative, Balanced, and Growth dampening options Drift detection alerts when currencies move away from your strategy Dry run preview before publishing any price changes Read-back verification confirms each price change published to the store Pricing matrix showing every market and plan with filtering and bulk editing Protected markets: lock specific markets, plans, or regions from changes Full price history with approvals, economic data, and calculations Covers 170+ Google Play markets in pricing recommendations Plan relationship validation to maintain pricing hierarchies	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
What makes it different	Pricing recommendations grounded in purchasing power data, not currency conversion alone Every recommendation shows its inputs and reasoning for review before publishing Safety-first publishing with dry runs, idempotent writes, and read-back verification Nothing publishes automatically; all changes require explicit user approval Pricing includes all 170+ markets; no per-market or per-product charges	Not given
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)	5 no change since last check	6 +2 (up) since last check
Trust Flow (Majestic)	1	15
Citation Flow (Majestic)	15	28
Referring domains (Majestic)	4	35

3 details filled in for both companies.

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