What Is Sei (SEI)?
Sei is a high-performance layer-1 blockchain that launched its mainnet in August 2023, built from the ground up for fast, low-cost trading and on-chain finance. SEI is the network's native token, used to pay gas, stake with validators, and vote on governance. Sei runs on a delegated proof-of-stake model, and its twin-turbo consensus paired with the redesigned SeiDB storage layer gives the network roughly 400ms block times with near-instant finality - one of the fastest settlement speeds of any public chain.
In July 2024 Sei launched Sei v2 and became the first parallelized EVM blockchain. As of early 2026 Sei pairs an Ethereum-compatible execution layer with a parallel engine that runs independent transactions at the same time, and the planned Giga upgrade is set to push throughput much higher while keeping sub-400ms finality.
What Is Sei EVM?
Sei EVM is the Ethereum Virtual Machine layer introduced with Sei v2. It runs standard Ethereum smart contracts without code changes, so familiar EVM tooling and tokens work on Sei - but with Sei's parallel execution and sub-second finality underneath. Every Sei account has two linked addresses: a native Cosmos address that starts with sei1... and an EVM address that starts with 0x..., mapped to each other through Sei's address-association system. SEI pays the gas on both sides.
Gem Wallet is a self-custodial Sei wallet with full Sei EVM support, so you can hold SEI and Sei EVM tokens, send and receive on the 0x... side of Sei, and interact with the EVM ecosystem - all from one app, with your keys staying on your device.
Sei Address Types
| Address format | Starts with | Used for |
|---|---|---|
| Native (bech32) | sei1... | Cosmos side: staking, governance, native SEI |
| EVM (hex) | 0x... | Sei EVM: smart contracts, EVM tokens, EVM dApps |
Both addresses are derived from the same key and linked on-chain. Source: Sei docs - account linking.
What Is a Sei Wallet?
A Sei wallet is an app that lets you create a Sei address and store, send, and receive SEI and Sei tokens without leaving your funds on an exchange. Because Sei now runs both a Cosmos layer and an EVM layer, a good Sei wallet handles SEI as gas and gives you a working 0x... EVM address for Sei EVM tokens and apps. A self-custodial Sei wallet keeps the private keys on your device, so you - and only you - control the funds.
Gem Wallet gives you a Sei address from a single 12-word recovery phrase, supports Sei EVM, and never asks for an email, account, or KYC. Gem Wallet is open-source and independently audited, so anyone can verify how it protects your keys.
Sei Wallet Features in Gem Wallet
- Sei EVM Support: Gem Wallet supports Sei EVM, giving you a working 0x... address to hold Sei EVM tokens and interact with the Ethereum-compatible side of Sei.
- Full Self-Custody: Gem Wallet keeps your Sei private keys on your device, secured by a single 12-word recovery phrase that also covers every other supported network.
- Store SEI and Sei Tokens: Gem Wallet lets you hold SEI alongside Sei EVM tokens like USDC, with live prices and full transaction history.
- Built-In DEX Aggregator: Gem Wallet lets you swap SEI and other assets right inside the app through an integrated decentralized exchange aggregator - no separate swap site needed.
- Stake SEI for Rewards: Gem Wallet lets you stake SEI to earn rewards and help secure the network, without giving up custody of your coins.
- Buy SEI with a Card: Gem Wallet lets you buy Sei with a credit or debit card and other payment methods, credited straight to your wallet.
- Open Source & Audited: Gem Wallet is fully open-source and independently audited, giving you transparency that closed wallets cannot.
- Mobile-Ready: Gem Wallet is a fast Sei wallet app for Android, iOS, and APK, so you can manage SEI and Sei EVM tokens on the go.
Download the Gem Wallet Sei wallet app today and store, swap, stake, and buy SEI with full Sei EVM support and complete self-custody on iOS, Android, and APK.









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