Sei Wallet: Use SEI on a 0x Address, Leave sei1 Behind Safely

A Sei wallet today is an EVM wallet that holds SEI, Sei's native coin, and tokens on a standard 0x address. You pay gas in SEI, blocks land in under half a second, and a transfer costs a tiny fraction of a cent. That's simpler than it used to be, because Sei started life as a Cosmos chain with sei1... addresses.

Sei is now finishing its move to EVM only, under a governance plan called SIP-3. If you've only ever used MetaMask-style wallets on Sei, little changes for you. But SEI still sitting at a sei1 address in a Cosmos wallet needs to move before the final upgrade. Facts below are as of October 2026.

Sei at a glance#

How a Sei wallet works#

Sei is a layer 1 built for trading and other high-volume apps. Its Twin Turbo consensus gives sub-second blocks, and its EVM runs transactions that don't conflict in parallel. To a wallet, the EVM side looks like any Ethereum-style network.

One key, two address formats#

Every Sei account has two addresses made from the same public key. The 0x form is for EVM use, and the sei1 form was for Cosmos functions. The Sei account docs compare them to the numeral 2 and the word "two": the same thing written two ways.

The chain only connects the two forms once it learns your public key, a step called association. Sending any transaction does it automatically. Until then they act as separate accounts with separate balances, which is why funds sometimes looked missing.

Your Sei wallet address in Keylo#

Keylo gives you the 0x form only. It derives the key on m/44'/60'/0'/0/0, Ethereum's coin type 60, which MetaMask also uses, so the address matches the one you have on Ethereum and every other EVM chain.

Cosmos wallets usually derived Sei keys with coin type 118 instead. The same recovery phrase then produces a different key and a different address. If you import a Keplr or Leap phrase into Keylo, expect a new 0x address with an empty balance. Your old funds are still at the address that wallet created.

SIP-3: Sei's move to EVM only#

SIP-3 removes Sei's Cosmos side in stages. Governance has already disabled new CosmWasm contracts and IBC transfers in both directions, the last of them in a proposal that passed on July 31, 2026. The final upgrade will turn off Cosmos interfaces, so sei1 transactions can no longer be broadcast. As of October 2026, Sei's migration page still describes that step as ahead and gives no date.

Sei asked exchanges and custodians to finish their own upgrade by June 15, 2026. After the final step, addresses can no longer be associated, so SEI left at an unlinked sei1 address would be stuck. What to do depends on where your SEI sits:

• Keplr or Leap. Move assets from your sei1 address to a 0x address with the Asset Transfer tool on the Sei Dashboard.

• Compass. Sei's docs say no action is needed, because Compass already exposes your assets through the EVM.

• A Ledger or a phrase-only wallet. Sei's guide has you create a new EVM account, fund it with about 0.1 SEI, associate it on the Sei Dashboard, then send your funds to the linked sei1 address it shows.

• Staked SEI at an unlinked address. Associate your addresses, or unbond. Unbonding takes 21 days, so start well before the shutdown.

• An exchange. Ask whether your balance moved to its 0x deposit system.

Send a 1 SEI test before moving a full balance, as Sei recommends. Keylo can't do this step for you, because it never signs sei1 transactions.

How to choose a Sei wallet#

Since SIP-3, the right Sei wallet is an EVM wallet. What's left to decide is how you'll use it.

• Extension and mobile wallets. MetaMask and Rabby come as browser extensions and phone apps, and Sei's docs list both as recommended wallets. They connect to Sei's DEXs, lending apps and staking pages once you add the network.

• Compass. A wallet made for Sei. Its users don't need to do anything for SIP-3, according to Sei.

• Sei Global Wallet. An embedded wallet built into Sei apps. You sign in with Google, X, Telegram or email instead of installing anything, so it lives inside those apps.

• Hardware wallets. A Ledger keeps your key offline. For 0x accounts, Sei's docs point to its Ethereum app; the Cosmos app controls a separate sei1 account.

• Exchange accounts. Handy for buying SEI, but the exchange keeps the keys.

• Web wallets. Keylo runs in a browser tab. It isn't an extension or an app-store app, but you can add it to your phone's home screen.

A good Sei wallet shows the network by name with chain ID 1329, so you never paste RPC links from a forum. It should also tell you plainly which address format it uses. Also avoid any wallet or service that still pushes sei1 deposits.

Keylo fits people who want to hold SEI and USDC, send them, and swap or bridge with the phrase they use on other chains. It's not a fit for staking SEI or using Sei apps, because Keylo can't connect to dapps.

How to create a Sei wallet in Keylo#

Sei is already in Keylo, so you won't add a network or a chain ID.

1. Go to the sign-up page and enter your full name, email, phone number and password, then repeat the password. Tick the terms and tap Create account.

2. Confirm the email if you see "Check your inbox".

3. Choose Create a new wallet. Your browser creates a 12-word phrase and encrypts it with a key derived from your password (Argon2id, then AES-256-GCM). Keylo receives only the encrypted copy.

4. Tap Sei in your asset list to see your SEI balance and 0x address.

5. Record the phrase: Settings, Recovery phrase, then your password. Write the words on paper and confirm the ones Keylo picks.

6. Set up Two-factor authentication and an Anti-phishing code in Settings too.

Do this before your first deposit, because Keylo has no copy it can read, and a password reset won't decrypt the wallet. Without the phrase, the wallet is gone.

Importing a phrase you used on Sei#

Choose Import a recovery phrase and enter 12 or 24 words. A MetaMask phrase shows your first account with its Sei balance, because both use coin type 60. A Keplr or Leap phrase gives a different address, as explained above. Move those funds with the Sei Dashboard first.

Keylo has no Sei testnet, so test with a small real transfer instead. At Sei's fees, that costs almost nothing.

How to receive SEI#

1. Tap Receive and choose Sei. The screen says "Receive on Sei" and shows a QR code.

2. Use Copy or Share on "Your Sei address", or let the sender scan it.

3. On an exchange, choose the Sei EVM network and paste the 0x address. Skip any option that wants a sei1 address or a memo.

4. Watch your SEI balance. On Sei, Keylo's activity list shows only transfers you send from Keylo, so check a deposit on Seiscan through the link next to your address.

Sei finalizes in under a second, so a deposit reaches your balance about as soon as the sender releases it. Keylo's Receive screen also mentions that your address is shared across EVM networks. A sender who picks Ethereum or Base instead still pays you, on that network. You'll see it there in Keylo and can bridge it to Sei.

How to send SEI and Sei tokens#

1. Tap Send and pick SEI or a token on Sei.

2. Paste or scan the recipient into To. Keylo accepts 0x addresses and checks the checksum. A sei1 address won't pass.

3. Enter an amount, or tap Max to send all your SEI minus the fee.

4. Tap Review, then choose Slow, Normal or Fast by their cost.

5. Check the network, the recipient and the fee in SEI.

6. Tap Send. Keylo signs in the browser, shows "On its way", then "Sent", with a Seiscan link.

Keylo simulates each transfer first, so one that would fail stops before you pay. It warns if the recipient is a smart contract, and it refuses to send a token to that token's own contract. If you hold USDC but no SEI, it tells you that you need SEI on Sei for the fee.

Keylo's Sei send has no memo field. That's correct for the EVM side, which never uses memos. If a transfer ever stays pending, Speed up resends it with a higher fee.

Sei network fees#

Sei's EVM charges gas in SEI with Ethereum-style pricing: a base fee and a small priority fee. On October 24, 2026, Seiscan's gas tracker showed a base of 50 gwei plus a 0.3 gwei tip. A plain SEI transfer uses 21,000 gas, so it cost about 0.001 SEI. With SEI near $0.055 that day, the fee came to well under a hundredth of a cent. The tracker priced an ERC-20 transfer at $0.00018.

Sei's docs add one caveat: gas you reserve but don't use may not be refunded in full. Good gas estimates therefore matter, and Keylo estimates each transfer's gas before showing the fee. The three fee levels often cost almost the same on a quiet network, and Keylo adds nothing to a normal send.

Sei is also rebuilding its engine under a program called Giga. Sei 6.6 reached mainnet on August 4, 2026, making a new execution engine (Ares) the default and starting a new storage layer (Eidos). New consensus comes later, and none of this changes how your wallet works.

Tokens, swaps and bridges on Sei#

Tokens on Sei's EVM are ERC-20 contracts, and their gas is paid in SEI. Circle issues USDC directly on Sei at 0xe15fC38F6D8c56aF07bbCBe3BAf5708A2Bf42392. Older IBC tokens from the Cosmos side are a separate matter. With IBC switched off, they can't leave the way they arrived, and Sei's docs say tokens such as USDC.n and USDT.kava can no longer be redeemed off Sei.

Keylo checks your address for a built-in list of popular tokens, such as USDC. As of October 2026, the entry labeled USDT is the old USDT.kava contract, so don't mistake it for redeemable Tether. Add anything else under Settings, Networks, Custom tokens with its contract address, symbol and decimals.

Swaps and bridges go through LI.FI, which compares Sei DEXs and cross-chain bridges:

1. Tap Swap and pick SEI, a Sei token or a coin on another network under You pay.

2. Pick the target network and token under You receive, or paste a contract.

3. Compare routes on output, time and fees.

4. Read the steps, the Minimum you receive and Delivered to, which is your own address.

5. Confirm, then follow progress until the funds land.

Default slippage is 0.5%. A bridge either delivers or refunds, sometimes in a different token that still reaches your wallet. Any Keylo service fee appears on its own line. The Keylo swap and bridge guide covers routes and refunds.

Sei scams and mistakes to avoid#

• Fake migration sites. SIP-3 gives scammers a story. Use only the Sei Dashboard and tools named in Sei's own docs, and never type a recovery phrase into a migration page.

• The wrong address format. Sending to a sei1 address after the final upgrade can strand funds. Use 0x only.

• Mismatched phrases. A Keplr phrase in an EVM wallet shows a different address. That's normal, so don't panic-send from the old wallet to a stranger offering help.

• Approval drainers. Airdrop and points sites ask you to sign approvals. Keylo can't sign website requests, so that attack has no way in.

• Fake support. Keylo staff never ask for your phrase or password. Reach them through Keylo support, and see Keylo's security measures.

Keylo has limits on Sei too. Staking SEI means delegating to a validator, with a 21-day unbonding period. Keylo offers staking only on its Cosmos networks, such as the Cosmos Hub, and it treats Sei as an EVM network, so SEI staking isn't available. With no browser extension and no WalletConnect, it can't reach Sei dapps. It has no NFT view, no hardware wallet pairing and no card purchases. It's non-custodial too, so a lost password plus a lost phrase means nobody can open the wallet. The networks page lists all supported chains.

Before your first real transfer:

1. Your phrase is on paper and confirmed.

2. You hold a little SEI on Sei for gas.

3. The exchange network is Sei EVM, with a 0x address and no memo.

4. Old sei1 funds have moved, or you know where they are.

5. A small test went through first.

Your phrase also works on other networks. The Cosmos Hub wallet guide explains the Cosmos side, and the Monad wallet guide and the Ethereum wallet guide cover other EVM chains.

Sei wallet FAQ#