How to Buy Sei (SEI)

Buy SEI on Binance step by step: KYC, deposit, order, withdraw. Covers the SIP-3 EVM-only migration, 0x addresses, staking and the bech32 deadline risk.

Sei (SEI) is a fast layer-1 with a parallelised EVM, designed for trading and high-frequency apps. This guide walks through buying SEI on a regulated exchange and moving it to a wallet you control.

Sei in context: what you are actually buying

Sei is a layer-1 built for trading workloads. Its v2 upgrade went live on 27 May 2024 and made Sei the first fully parallelised EVM, running an Ethereum execution environment alongside the chain's original CosmWasm environment with optimistic parallelisation and a purpose-built storage layer, SeiDB. SEI is the network's gas, staking and governance asset.

The one thing that has changed: Sei is now EVM-only

SIP-3, approved by SEI governance in May 2025, committed the chain to a single EVM execution environment — deprecating CosmWasm contracts, IBC transfers and the native Cosmos transaction layer. For holders, the practical consequence is an address change. Sei historically had two address formats: Cosmos-style bech32 addresses beginning sei1, and standard Ethereum-style 0x addresses. Under the migration, exchanges and custodians had to move balances to 0x addresses, with Cosmos, CosmWasm and IBC functionality deprecated on 15 June 2026. Coinbase, for example, ran its migration window in April 2026, suspended SEI deposits and withdrawals during it, converted balances 1:1 with no fee, and stopped supporting deposits to bech32 addresses afterwards.

What that means when you withdraw

Withdraw SEI to a 0x address from an EVM-compatible wallet. If a wallet or guide still hands you a sei1 address, it predates the migration — do not use it. This is the single highest-consequence detail on the page, and it is worth re-reading your exchange's current SEI deposit and withdrawal notice rather than trusting older instructions.

Listings and fee profile

SEI trades on Binance, Coinbase and Kraken. On-chain, Sei is designed around low latency and cheap execution, so moving SEI between your own wallets costs a negligible amount in gas; the exchange's flat withdrawal fee will usually dominate the total cost of getting coins into self-custody, which is an argument for one larger withdrawal over several small ones.

Staking SEI

SEI is a delegated proof-of-stake asset: you delegate to validators and earn rewards, and undelegating runs through an unbonding period during which the tokens cannot be sold. SIP-3 moved staking to the EVM side of the chain. Our Sei staking guide walks through delegation.

The SEI-specific risk

Sending SEI to a legacy bech32 address, or to an exchange deposit address copied from pre-migration documentation, is the failure mode to guard against. Always re-copy the deposit address from the exchange on the day you send, and test with a small amount first.

What you'll need (prerequisites)

• Government-issued ID
• Bank account or debit card
• Email address
• Authenticator app for 2FA

Step-by-step

1. Step 1: Open an account on Binance

   Visit the official Binance website (also available: Coinbase, Kraken). Click "Sign up", enter your email and a strong password, then confirm the link sent to your inbox.

2. Step 2: Verify your identity (KYC)

   Regulated exchanges require ID verification before fiat deposits. Upload a government-issued ID (passport or driver's licence) and a selfie. Verification usually completes in minutes, occasionally up to 24 hours.

3. Step 3: Enable two-factor authentication

   In your security settings, enable 2FA with an authenticator app (Authy, Google Authenticator or Aegis). Avoid SMS 2FA — it is vulnerable to SIM-swap attacks. Save the recovery codes offline.

4. Step 4: Deposit fiat

   Link a bank account or debit card, or use SEPA / ACH / Faster Payments. Bank transfer is cheapest; card deposits add a 1.5–4% surcharge. Card deposits credit instantly; bank transfers take hours to days.

5. Step 5: Place a market or limit order for SEI

   Go to the SEI/USD (or SEI/USDT) pair. A market order fills immediately at the best available price; a limit order only fills at the price you set — better for larger orders to avoid slippage.

6. Step 6: Withdraw to self-custody

   Transfer your SEI to a wallet you control — Compass, Keplr or MetaMask (Sei EVM). Select the native Sei network when withdrawing, and send a small test transaction first to confirm the address before moving the full balance. Exchanges are custodial: not your keys, not your coins.

Swap instantly, no account

Already hold crypto? Skip the exchange sign-up and swap straight into SEI — a non-custodial, third-party exchange, no account required. The conditional-KYC and affiliate disclosures are rendered inline in the widget and are not optional.

Common errors and fixes

• KYC delayed >24h. Re-upload a clearer photo of your ID with the corners visible and good lighting. Contact support if it still takes longer than 48 hours.
• Bank transfer rejected. Some banks block transfers to crypto exchanges. Try a different bank, a debit card, or an on-ramp like MoonPay / Banxa.
• Withdrawal address rejected. Confirm you copied the full address and selected the native Sei network — sending on the wrong network can lose the funds permanently.
• 2FA code rejected. Your phone clock and the authenticator must be in sync. Re-sync the device clock, or restore 2FA from your recovery codes.
• High withdrawal fee. Compare the exchange's flat SEI withdrawal fee against your order size; batch withdrawals to amortise the fixed cost.

FAQ