FIO Protocol is a decentralized layer that links crypto wallet addresses to human-readable names for easier cross-chain transfers.
Fio
Ecosystem guide
The Fio ecosystem
The best dApps on Fio by sector: DeFi, games, NFTs and more. 1 projects tracked, 1 reviewed in full.
Full Fio ranking →- dApps
- 1
- Reviewed
- 1
- TVL tracked
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- Native token
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FIO, short for Foundation for Interwallet Operability, is a blockchain protocol founded in 2020. Rather than hosting a broad range of smart contract applications, it works as a shared layer that links wallet addresses on many chains to short, human-readable names. FIO runs on its own chain, FIO Chain, and is not an EVM network, so Ethereum-style contracts and tooling do not apply here in the usual way.
The native token, FIO, is used to pay for activity on the network, including registering handles and domains and other protocol actions. Project materials describe it as having a capped maximum supply of 1 billion tokens. We do not have reliable price or DeFi TVL figures for this chain, so none are shown on this page.
The FIO ecosystem is known for one idea: the FIO Crypto Handle, written as username@domain, which replaces long public addresses with a single identity that can map to many networks. The FIO Protocol is the only dApp we list on this chain, and it sits in the infrastructure category. It suits readers who want easier cross-chain transfers rather than yield farming, trading or gaming.
Fio ecosystem in numbers
- Tracked
- 1
- Reviewed
- 1
- Total TVL
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- Avg. score
- 5.5/10
Highest rated
- 1
Fio5.5
Reviewed
Top-rated dApps on Fio
By sector
Best Fio dApps by sector
Infrastructure on Fio1
- 1
Guides
Fio guides
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Blockchain Examples and How They WorkLearn how blockchains record and verify transactions, how consensus keeps a shared ledger in sync, and how Bitcoin, Ethereum and other networks put the technology to work. See practical examples, key trade-offs and ways to assess whether a blockchain is a good fit.
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Blockchain for Data: Uses, Limits and How It WorksBlockchains can create shared records that are difficult to alter, but they are not a general-purpose replacement for databases or file storage. Learn what belongs on-chain, how blockchains connect to outside data, and when the trade-offs make sense.
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Casper Network and CSPR: A Practical Guide for 2026Casper Network is a proof-of-stake blockchain, and CSPR is its native token. This guide explains the network’s purpose, how CSPR is used, and what to check before staking or transacting.
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Cosmos Network Guide: Chains, IBC and ATOM in 2026Cosmos is an ecosystem of independent blockchains, not one chain that processes every app and token. Learn how the Cosmos Hub, Cosmos SDK and IBC fit together, what ATOM does, and how to assess transfers, staking and risks in 2026.
Blockchain
How the Bitcoin Lightning Network WorksThe Bitcoin Lightning Network moves payments through channels that sit on top of Bitcoin, so most transfers do not need their own blockchain transaction. Learn how channels, routing, fees and liquidity work, and what to consider before using Lightning.
Blockchain
How to Mine Cryptocurrency on Android in 2026Android phones can run mining software, but their limited processing power, battery drain and heat make profitable mining unlikely. Learn how to assess the risks, try a small proof-of-work experiment safely, and spot apps that only simulate mining or sell cloud contracts.
Fio FAQs
What is the FIO Protocol?
FIO stands for Foundation for Interwallet Operability. It is a decentralized protocol with its own blockchain, built to link long, hard-to-read wallet addresses to short, human-readable names so sending crypto is easier and less error-prone.
What is a FIO address or Crypto Handle?
A FIO Crypto Handle, also called a FIO Address, is formatted as username@domain. One handle can be mapped to wallet addresses on many different blockchains, so a sender only needs to know the handle instead of copying a separate address for each network.
Is FIO an EVM chain?
No. FIO runs its own chain, called FIO Chain, rather than being an EVM network. It is mainly an infrastructure layer for naming and wallet interoperability, not a general-purpose smart contract platform with a DeFi scene.
What is the FIO token used for?
The FIO token is the native asset of FIO Chain. According to the project's own materials, it is used to pay for transaction fees, such as registering handles and domains and performing other protocol actions. Check current fee schedules in a FIO-compatible wallet before registering.
How many dApps are on FIO?
Only one dApp, the FIO Protocol itself, is listed here at the time of writing. The chain is focused on a single infrastructure purpose, so there are no DEXs, lending markets or games to compare. DeFi TVL data is not available for it.
How do I send crypto to a FIO handle?
Wallets and exchanges that integrate FIO let you send to a handle instead of a raw address. Support varies by app, so check that your wallet or exchange lists FIO handle support, and verify the handle with the recipient before sending, since crypto transfers can't be reversed.
Which dApp on Fio has the highest DappsAtlas score?
Fio has the highest score at 5.5/10. Scores weigh security, ease of use, fees and features, and are based only on facts we could verify.
How many dApps are on Fio?
DappsAtlas tracks 1 dApps on Fio. Of these, 1 has a full review.