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FIO Protocol review

Freemium#12 of 21 in Blockchain Domain Services

FIO replaces long wallet addresses with handles and adds encrypted crypto payment requests.

7.0/10Editor score
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FIO Protocol7.0 Visit FIO Protocol

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

FIO Protocol gives people and applications human-readable FIO Handles and FIO Domains in place of blockchain public addresses. The web-based FIO App supports registering and managing them, mapping handles to blockchain addresses, sending encrypted payment requests and metadata, transferring ownership, staking tokens, and wrapping domains. Its free plan and address-mapping features make it a fit for users who want a simpler identifier for crypto payments, while application developers can use the REST API to resolve handles. The protocol runs on the public FIO Chain and is open source.

The product’s standout focus is linking identity with payment communication. FIO Requests let users send encrypted crypto payment requests, and FIO Data provides encrypted transaction metadata. NFT signatures and attestations add identity-related functions, while token transfer and staking are also supported. These capabilities make FIO broader than a handle lookup alone, but they are centered on FIO’s own protocol and chain. Buyers should consider whether those protocol-specific functions fit the wallets and applications they intend to use.

The free plan covers FIO Handles, while the listed FIO Domain plan is for an NFT domain used as a Web3 identity and allows transfer and trading. The official app page displayed a price of 7.51 USDC when checked, and domain pricing is dynamic, so the amount may vary. FIO Domains intentionally have no extensions. Web, API, cloud, and browser-extension access are listed, with ticket, community, and documentation support. Choose FIO if free human-readable handles, address mapping, and encrypted payment requests are priorities; look elsewhere if a domain extension is essential or if the specific FIO protocol features do not match your intended ecosystem.

FIO Protocol pros and cons

  • Where it wins
    • Maps human-readable FIO Handles to blockchain public addresses
    • Supports encrypted FIO Requests and transaction metadata
    • Offers REST API handle resolution and an open-source protocol
  • Where it doesn't
    • FIO Domains have no extensions
    • FIO Domain pricing is dynamic and shown in USDC
    • Domain pricing may vary over time

FIO Protocol fact sheet, pricing and score →

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