Rainbow

Rainbow is a non-custodial mobile and browser extension wallet for Ethereum and EVM-compatible networks, founded in 2019 and headquartered in Brooklyn, United States. It is built for users who want direct control over their private keys while managing tokens, NFTs, and DeFi interactions across Ethereum mainnet and its Layer 2 ecosystem. The wallet is notable for its design-focused interface and integration of built-in swap and bridge functionality.

Security

• Non-custodial: Private keys are stored locally on the device. Rainbow has no server-side access to seed phrases or private keys at any time.
• Backup options: On iOS, keys can be encrypted and backed up to iCloud; on Android, to Google Drive.
• Open source: Both the mobile app and browser extension codebases are publicly available on GitHub under the rainbow-me organisation. This allows independent security researchers to review the code for hidden functionality or vulnerabilities.
• Flashbots MEV protection: Ethereum mainnet swaps are routed through Flashbots Protect by default, reducing exposure to front-running and sandwich attacks.
• Hardware wallet support: Compatible with Ledger hardware wallets. All transactions require physical confirmation on the device.
• Approval management: Built-in tools to monitor and revoke outstanding DeFi smart contract permissions.

Regulation

Rainbow operates as a self-custodial software wallet — not as a custodial service, exchange, or money transmitter. It holds no regulatory registrations with bodies such as the FCA or FinCEN. No KYC is required to use the wallet.

Incident History

No security breaches affecting Rainbow's wallet infrastructure have been publicly reported. Reported user losses involving Rainbow have stemmed from external phishing campaigns or users approving malicious DeFi contracts — not from flaws in Rainbow's own codebase. The open-source codebase enables ongoing community-led review.

Token Launch (2025–2026)

In December 2025, Rainbow announced the $RNBW token, conducting an ICO with CoinList targeting a $3M raise at a $100M fully diluted valuation. Fifteen percent of the total token supply was allocated to an airdrop for active historical users. The token is a separate product from the wallet and carries its own risk considerations.

Availability

Rainbow is available globally on iOS, Android, and as a Chrome browser extension. It supports Ethereum mainnet and a broad set of EVM-compatible Layer 2 networks including Optimism, Arbitrum, Base, Polygon, BNB Smart Chain, and Avalanche. Non-EVM chains such as Bitcoin and Solana are not supported.