head to head/Developer Tools

Send21 vs Subtraq

Neck and neck on boosts. Profiles, pricing and deals below.

Send21

Try a crypto pay link on testnet, no account

community boosts

⚡ 0

pricing

Freemium

what it is

Make a real test payment from your own wallet on Bitcoin, Solana, Ethereum, Base, Arbitrum and Polygon test networks. No account, no email.

Subtraq

API, webhooks and MCP server for developers

community boosts

⚡ 0

pricing

Freemium

what it is

Create a link, read attribution, record a sale: one key, one header, plain HTTP calls. Signed webhooks, OpenAPI, and MCP included.