Sei Wallet Guide: SEI on the EVM, Addresses and Fees

Sei addresses: 0x today, sei1 in the past

Keylo gives you a standard 0x address for Sei, the same one you see on Ethereum and other EVM chains. Historically, every Sei account also had a Cosmos-style sei1 address derived from the same public key, and the two were linked once the account sent its first transaction. Many exchanges and older wallets, such as Compass and Keplr, worked only with sei1 addresses.

With SIP-3, Sei is phasing out the Cosmos side: inbound IBC transfers and native Cosmos transactions are being switched off, and bech32 deposits are on their way out. If you still hold SEI at a sei1 address in an older wallet, follow Sei's official migration guidance to move it to an EVM address, and stop giving out sei1 addresses for deposits.

What SIP-3 means if you used Sei before

SIP-3 is a Sei governance proposal from 2025 that is being carried out in stages: first no new CosmWasm contracts, then switching off IBC transfers, and finally removing native Cosmos transactions so only EVM addresses can start a transaction. Staking and governance carry on through EVM interfaces. The goal is a simpler protocol ready for Sei's next performance upgrade, known as Giga.

If you only ever used MetaMask-style wallets on Sei, nothing changes for you. If you held SEI or tokens through Compass, Keplr or an exchange's Cosmos-side listing, check where those funds are now. IBC tokens such as ATOM or the old USDC.n need to leave Sei through official routes, and SEI at a sei1 address should be moved to an EVM address with Sei's migration tools. Exchanges were asked to upgrade their own systems for customer balances.

How to create a Sei wallet with Keylo

Keylo's servers only ever hold the encrypted wallet. They never see your password, phrase or keys, so Keylo cannot move your SEI or rescue a lost phrase. You can also import an existing 12- or 24-word phrase; if it came from MetaMask or another EVM wallet, the same 0x address appears because Keylo uses the default Ethereum path.

1. 1

   Open create a wallet in your browser. Keylo runs on phones, tablets and computers without an extension.

2. 2

   Register with your name, email, phone and a strong password, and confirm your email.

3. 3

   Keylo generates a 12-word recovery phrase locally and encrypts it with a key derived from your password before saving it.

4. 4

   Pick Sei from your networks to see your SEI balance and 0x address.

5. 5

   In Settings, re-enter your password, reveal the phrase and write it down. Keep it offline.

How to receive SEI

Some exchanges kept separate listings for Sei's Cosmos and EVM sides during the transition, sometimes with similar names. If the withdrawal form will not accept a 0x address, you are probably on the old Cosmos option. Look for an option that names Sei EVM, or ask the exchange's support which network it uses, before sending anything sizeable.

1. 1

   Open SEI on the Sei network and tap Receive.

2. 2

   Copy the 0x address or show its QR code. Keylo shows the Sei network name right beside it.

3. 3

   When withdrawing from an exchange, choose the Sei EVM network and paste the 0x address. Avoid any option that asks for a sei1 address.

4. 4

   Watch Activity. Sei finalises in under a second, and each transaction links to the explorer.

How to send SEI

Keylo only sends to 0x addresses on Sei. If a recipient gives you a sei1 address, ask for their EVM address instead; with Cosmos transactions being retired, a sei1 address is no longer a safe destination for new payments. For exchange deposits, copy the 0x deposit address the exchange shows for Sei EVM, and check whether it asks for anything extra before you confirm.

1. 1

   Open SEI or a Sei token and tap Send.

2. 2

   Paste or scan a 0x recipient address. Keylo checks the checksum and warns you about contract addresses.

3. 3

   Enter the amount or tap Max to send everything minus the fee.

4. 4

   Choose slow, normal or fast, then check the summary showing the exact amount and network fee.

5. 5

   Confirm. The transaction is signed in your browser and broadcast to Sei.

Gas fees on Sei

Every Sei EVM transaction pays gas in SEI. The model will look familiar if you know Ethereum: a gas limit multiplied by a price per unit, with fees that are a small fraction of a SEI for ordinary transfers. Because Sei executes non-conflicting transactions in parallel and produces blocks every few hundred milliseconds, congestion that pushes fees up is rare compared with older chains.

Keylo's slow, normal and fast options adjust the price you offer, and the review screen shows the network fee before you sign. Keylo adds nothing to normal sends. Token transfers still need SEI for gas, so keep a little SEI on hand even if you mostly hold stablecoins.

Speed is the other side of the fee story. Sei typically finalises a block in around 400 milliseconds, and a finalised block is not rolled back, so the fast option rarely makes a visible difference. Where you will notice delay is at the edges: exchanges batching withdrawals, or bridges waiting for confirmations on the other chain before releasing funds.

Tokens and stablecoins on Sei

Sei tokens are ERC-20 contracts reachable from your 0x address. Circle issues native USDC on Sei's EVM, which replaced an older IBC-bridged version called USDC.n. Sei's own guidance has urged USDC.n holders to migrate, because IBC assets lose their path home once IBC transfers are disabled. If you hold any IBC-based token on Sei, check its status on Sei's official channels.

As on every EVM chain, symbols can be copied freely. Compare any token's contract address on the explorer with the address the issuer publishes before you trade or accept it, and treat unexpected tokens that appear in your wallet as possible bait rather than free money.

Swap or bridge SEI

Swaps and bridges on Sei come through LI.FI in Keylo. With native USDC on Sei, the common trades are SEI to USDC and back, while bridges bring funds over from Ethereum, Arbitrum or Base. The quote screen shows which DEX or bridge is used, the expected output, the minimum received and each fee, including any small service fee. Background is on swap and bridge.

Keylo follows bridge transfers until they arrive, and if a route cannot finish, the protocol returns the funds to the sending wallet. Keylo does not offer SEI staking; if you want to stake, use Sei's official staking interface with a wallet it supports, and understand the unbonding period first.

Sei safety tips

• Use your 0x address for all new deposits; sei1 addresses belong to the retiring Cosmos side.
• Beware of fake migration sites. Only follow links from Sei's official website or documentation.
• Expect a different address when importing a Cosmos wallet phrase, because of the different coin type.
• Check token contracts, especially stablecoins, before trading.
• Never share your phrase or password. Keylo support never asks for them.
• Enable two-factor authentication and keep an eye on new-login alerts.

Frequently asked questions