Rabby Wallet Extension: Complete Breakdown of Which 90+ EVM Chains Are Supported and Why Missing Yours Matters

A developer working across Ethereum, Polygon, and Arbitrum has a practical problem: switching between wallets for each network creates friction, increases key management complexity, and multiplies the surface area for mistakes. A multi-chain wallet promises to solve this by consolidating access to dozens of blockchain networks under a single interface. But not every wallet supports every chain, and discovering which networks are actually available—and which are not—often happens only after setup is complete.

Rabby Wallet, developed by the DeBank team, positions itself as a comprehensive solution for managing digital assets across 90+ EVM-compatible chains. The platform delivers this through browser extensions for Chrome, Brave, Edge, Opera, and Arc, as well as native applications for iOS and Android. But coverage of “90+ chains” requires clarity: which specific networks are included, how complete is the support, what happens when a user needs access to an unsupported chain, and does the wallet’s architecture actually deliver the seamless experience that multi-chain support implies?

The EVM standard and why it matters for wallet compatibility

The Ethereum Virtual Machine (EVM) is not a single blockchain. It is a computational standard that defines how smart contracts execute, how transactions are structured, and how addresses work. The Ethereum Foundation’s official documentation describes the EVM as the runtime environment that processes code and state changes across the Ethereum network. What makes this relevant for wallet design is that dozens of independent blockchains—Polygon, Arbitrum, Optimism, Base, Avax-C, Gnosis, and others—use the same EVM standard to maintain compatibility with Ethereum’s tooling, address formats, and smart contract ecosystem.

A wallet built for the EVM can theoretically support any blockchain that implements the same standard by simply adding a new network configuration: a chain ID, a few RPC endpoints, a block explorer link, and perhaps a name and native token symbol. In practice, the distinction between “can support theoretically” and “actually supports in production” is significant. A wallet that lists “90+ chains” may mean that the developers have added 90 configurations; it does not necessarily mean that every chain has been tested, that liquidity exists for common tokens, that the user interface clearly displays which chain is active, or that recovery and backup work identically across all networks.

DeBank, the team behind Rabby Wallet, has focused on broad EVM coverage rather than limiting support to the largest or most liquid networks. This approach creates both opportunity and risk. The opportunity is that a user can manage assets across emerging or less centralized chains without abandoning their primary wallet. The risk is that lesser-used chains may have unreliable RPC endpoints, inaccurate price feeds, or limited exit liquidity, turning a multi-chain wallet into a potentially expensive puzzle when funds need to move back to Ethereum or another major network.

Core supported networks: The tier-one list

Rabby’s support starts with the networks where the majority of users keep assets and where liquidity is deepest. Ethereum mainnet is the foundation; all other EVM chains derive compatibility from its technical model. Polygon (formerly Matic) is the second-largest by adoption, running as a sidechain with its own validator set and offering significantly lower fees than Ethereum layer one. Arbitrum and Optimism are both Ethereum layer-two solutions, but they differ in their technical approach. Arbitrum uses optimistic rollup technology with fraud proofs, while Optimism uses a similar model with slightly different sequencer economics. For a user managing assets on both, the wallet must distinguish between them clearly because bridging tokens from one L2 to another requires an intermediate step through Ethereum or a third-party bridge.

Other major networks in the tier-one category include Binance Smart Chain (BSC), which runs as an independent sidechain but maintains EVM compatibility; Avalanche’s C-Chain, a separate subnet within the broader Avalanche ecosystem; Fantom, Gnosis Chain (formerly xDai), and Base, which is Coinbase’s Ethereum layer-two launched in 2023. Polygon zkEVM is also supported, representing a different technical approach to scaling using zero-knowledge proofs rather than optimistic rollups. rabby wallet extension displays a straightforward network switcher that places these major networks at the top of the list, reducing the need to scroll through dozens of smaller chains when switching accounts.

Coverage of these tier-one networks means that a user holding assets across Ethereum, Polygon, Arbitrum, Optimism, and Avalanche can view balances and execute transactions from a single wallet interface. The practical value is substantial. Instead of importing recovery phrases into five separate wallet applications, a user can maintain one set of credentials and switch networks by selecting from a dropdown menu. Hardware wallet integration applies across all supported networks, so a Ledger or Trezor user does not need separate hardware signing for Ethereum versus Polygon transactions.

Extended network support: From 20+ chains to 90+

Beyond the tier-one networks, Rabby supports dozens of additional EVM-compatible chains that appeal to specific user communities, region-specific platforms, or experimental Layer-2 solutions. This extended list includes Linea (another Ethereum L2 backed by Consensys), Scroll, Mantle, Manta, Celo, Moonbeam, Moonriver, Harmony One, Tron, Aurora, Cronos, Evmos, Klaytn, Optimism’s OP Sepolia testnet, and numerous others.

The distinction between a “supported” network and a “tested and actively maintained” network becomes important here. Rabby’s development team cannot audit the security practices, RPC endpoint reliability, or consensus mechanics of 90+ independent blockchain projects. What they can do is accept network configuration submissions, verify that the chain ID and basic parameters are correct, and allow users to add custom networks if they are not listed by default. This is why examining the actual current list—available through the official wallet interface—is more reliable than assuming that a published “90+” figure represents comprehensive support for every possible EVM-compatible chain.

Several of the extended networks have particular relevance for specific user groups. Harmony One appeals to users in Asia-Pacific regions where the network has commercial partnerships. Celo is designed around mobile-first access and real-world payments in developing markets. Tron, while maintaining EVM compatibility through a separate mode, historically used a different virtual machine, creating potential confusion if documentation is not precise. A user adding one of these networks to Rabby should verify the official network parameters through the chain’s documentation rather than relying solely on configuration files, especially when moving significant value.

Hardware wallet integration across all supported networks

One of Rabby’s most significant practical advantages is that hardware wallet integration works consistently across all supported networks. Users can connect a Ledger, Trezor, Keystone, OneKey, GridPlus, or BitBox02 device and then switch between Ethereum, Polygon, Arbitrum, and dozens of other chains without needing to reconnect the hardware device or manage separate derivation paths for each network.

Ledger’s official documentation describes the standard derivation path for Ethereum and EVM-compatible chains: `m/44’/60’/0’/0/n`, where the `60’` component identifies the Ethereum standard. Because Polygon, Arbitrum, and most other EVM chains use this same path, a hardware wallet that generates keys for Ethereum can sign transactions for any EVM-compatible chain without additional setup. Rabby implements this standard correctly, which means that a user can restore a hardware wallet, select the EVM app on the device, and then access accounts on multiple chains through a single interface.

The security model here is important to understand. The hardware device remains responsible for signing transactions; Rabby never has access to the private keys. When a user confirms a transaction, Rabby sends the unsigned transaction data to the hardware device, which displays it on screen and requires physical approval. This means that the quality of Rabby’s transaction simulation and risk warnings becomes even more valuable for hardware wallet users, because the device’s small screen may not display all transaction details. If Rabby’s interface clearly highlights a suspicious transaction—such as an approval with unlimited token allowances or a swap with extreme slippage—the user is more likely to catch the mistake before hardware confirmation.

Transaction simulation, approval management, and risk detection

Rabby includes transaction simulation as a core security feature, showing the user what will happen before they sign. If a transaction would fail due to insufficient balance, incorrect parameters, or smart contract reversion conditions, the simulation typically detects and displays this. If a transaction attempts to approve a token with unlimited allowances—a common vector for wallet drains—Rabby’s approval decoder flags this and suggests limiting the approval to the amount actually needed.

The approvals manager deserves specific mention because token approvals are one of the highest-leverage security decisions a blockchain user makes. When a user interacts with a decentralized exchange, a lending protocol, or a bridge, they typically grant the protocol’s smart contract permission to spend some or all of their tokens. That approval is permanent unless explicitly revoked. If the protocol is later compromised or the user no longer intends to use it, the old approvals remain active, and anyone controlling the contract can drain the wallet. Rabby’s interface for reviewing and revoking approvals reduces the overhead of auditing this risk, especially as the number of tokens and networks grows.

The wallet also includes an EVM address checker and token approval decoder, tools that help users verify that addresses are correct before sending and understand exactly what permissions they are granting. These features are particularly valuable across multiple networks because address checksums—the uppercase and lowercase letters in Ethereum addresses that encode error detection—function identically across all EVM chains. A user can copy an Arbitrum address and safely use it on Polygon or Base without format conversion.

Gas accounts and stablecoin-based fee payments

One of Rabby’s distinctive features is the Gas Account, which allows users to pay transaction fees from a balance of USDC or USDT instead of requiring the native token of each chain. This significantly reduces friction for users managing assets across multiple networks. Instead of maintaining a balance of ETH for Ethereum transactions, MATIC for Polygon, ARB for Arbitrum, and OP for Optimism, a user can simply keep a stablecoin balance and let Rabby handle the conversion at transaction time.

The mechanics require either a swap or a pre-funded gas relay service. When a user initiates a transaction on a network where they lack native tokens, Rabby can swap a small amount of stablecoin for the network’s native token in the background, then use it to pay the transaction fee. Alternatively, the Gas Account feature may route transactions through a relay service that accepts stablecoin payment upfront and broadcasts the transaction on behalf of the user. The specific implementation depends on network liquidity and available services, but the user-facing result is that gas fees are deducted from a stablecoin balance at a transparent rate, rather than forcing the user to pre-position native tokens on every chain.

This feature has a direct security implication for approval management. If a user needs to revoke multiple token approvals across different networks, they might otherwise need to maintain small balances of several native tokens just to pay the fees. The Gas Account reduces this cost, making it more practical to audit and clean up old approvals across all the networks where the user has ever interacted with protocols. In that sense, it is a security multiplier: it removes the economic disincentive that might otherwise prevent users from maintaining good approval hygiene.

Swap functionality, fees, and liquidity considerations

Rabby offers built-in token swaps with a 0.25% protocol fee on most swap pairs, with free swaps specifically for stablecoin-to-stablecoin transactions (USDC to USDT, for example). The swap interface displays quotes from multiple liquidity sources, allowing users to see the best available rate before confirming. This is a convenience, but it also introduces an important caveat: swap rates are not guaranteed until the transaction is signed and broadcast. Market conditions can shift between quote and settlement, creating slippage or failed transactions in volatile conditions.

The practical limitation is that liquidity depth varies significantly across the 90+ supported networks. On Ethereum, Polygon, and Arbitrum, most major tokens have deep liquidity pools and tight spreads. On smaller or newer networks, finding a swap partner for a less common token may be difficult or expensive. A user looking to swap a token that exists primarily on one chain and has minimal liquidity on Rabby’s integrated routes might find it more cost-effective to bridge to a major network first, execute the swap there, and then bridge back. Rabby’s support for 90+ chains does not guarantee that every token has valuable liquidity on every network.

Open-source verification and security audit history

GitHub hosts the open-source code for many blockchain projects, allowing developers and security researchers to review source code, identify vulnerabilities, and verify that published claims match actual implementation. Rabby’s open-source status means that users and auditors can examine the code for transaction signing logic, key derivation, and approval management. The wallet has undergone security audits, which are published reviews by third-party firms identifying and verifying fixes for potential vulnerabilities.

Open source does not mean “perfect” or “every developer has reviewed the code.” It means that the code is available for review, and that professional audits have been performed. For a self-custody wallet—where the user is responsible for their own private keys and recovery—this transparency is material. If a vulnerability exists, the user has the opportunity to review it, understand the risk, and decide whether to use the wallet or upgrade to a patched version. For comparison, closed-source wallets do not offer this option; users must trust the vendor’s security claims without independent verification.

Wikipedia’s cryptocurrency wallet article discusses the security models and trade-offs between custodial services, multi-signature schemes, and self-custody wallets like Rabby. Self-custody places full responsibility on the user for securing the recovery phrase and maintaining the device’s security. If a recovery phrase is stolen or a device is compromised, there is no customer service team that can reverse the theft. The compensating control is that no third party can freeze or take the assets.

What happens when a network is not supported

Despite support for 90+ networks, some EVM-compatible chains remain outside Rabby’s default list. This can happen because the chain is very new, has limited adoption, is primarily a testnet, or is specific to a particular vendor’s ecosystem. When a user needs to access such a network, Rabby allows manual network addition through a custom network dialog. Users supply the chain ID, RPC endpoints, a block explorer URL, and the native token symbol and decimal places.

Adding a custom network is straightforward, but it introduces a vulnerability: if the RPC endpoint is compromised, controlled by a malicious actor, or simply misconfigured, it can display false balances, fabricate transaction history, or cause the wallet to sign transactions on the wrong chain. Users adding custom networks should verify the chain ID and RPC endpoints through multiple official sources—typically the blockchain’s official documentation and GitHub repository—rather than relying on third-party guides that may contain typos or intentional errors.

For chains that Rabby does not support and that users cannot safely add as custom networks, the fallback is to use a chain-specific wallet or a more general-purpose solution. This introduces the friction that a multi-chain wallet is supposed to eliminate. Users who regularly move between Rabby’s supported 90+ networks and an unsupported chain face a choice: accept the inconvenience of switching wallets, or consolidate their activity on networks where Rabby is available.

Avoiding fake Rabby sites and browser extension scams

Rabby’s popularity has created a secondary risk: fraudulent websites and browser extensions impersonating the official wallet. Scammers register domain names similar to “rabby.io,” host phishing pages that mimic the login interface, or publish fake extensions to browser stores. When a user unknowingly uses a fraudulent extension, their recovery phrase, private keys, or seed phrases are captured immediately, allowing the attacker to drain the wallet.

The safest installation path is to visit the official domain rabby.io directly, verify that the URL is spelled correctly, and then download the extension from the legitimate browser store link. For desktop users, the official website provides direct links to the Chrome Web Store, Brave Web Store, and Edge Add-ons. For mobile users, the official App Store and Google Play links are available from rabby.io. After installation, users should enable all available security features, including biometric authentication where supported, and never share their recovery phrase with anyone, including Rabby support staff.

The regulatory environment for self-custody wallets remains uncertain in many jurisdictions. FinCEN, the Financial Crimes Enforcement Network, has issued guidance on wallet regulatory classification, though interpretations vary by context and jurisdiction. The CFTC provides oversight of cryptocurrency futures and certain derivatives, but spot wallet transactions sit in a grayer zone. Users in regulated industries or jurisdictions should consult legal counsel on whether self-custody tools like Rabby create reporting or compliance obligations.