Buy Sei with a dedicated broker handling the trade from your first question through to settlement into institutional custody.
Buy Sei with a dedicated broker handling the trade from your first question through to settlement into institutional custody.
Create your account Register and verify your identity. No experience needed, and nothing to set up yourself. Most accounts are ready to fund the same day.
Speak to your broker A dedicated broker walks you through how buying Sei works and answers your questions. No order books, no charts, no guesswork.
Fund your account and get your quote Fund in your preferred currency and your broker prepares a live quote, so you know exactly what you’re getting before you commit. Larger orders route through OTC execution.OTC execution.
Buy and settle into custody Confirm with your broker and your SEI settles into institutional custody secured by Fireblocks. Hold it there or withdraw to your own wallet anytime.Fireblocks. Hold it there or withdraw to your own wallet anytime.
General considerations not advice. How you act on them depends on your own circumstances.
Crypto is volatile Sei’s price can move sharply in both directions sometimes within a single trading session. It’s an asset class to approach with capital you’re prepared to see fluctuate in value. General information only not a prediction or recommendation.
General information only — not a prediction or recommendation.
Where it’s held matters Crypto bought on an exchange typically sits on the exchange’s balance sheet. Institutional custody holds your SEI separately a structural difference worth understanding before you buy.
How custody worksBroker vs exchange Buying Sei through a broker works differently from a self-serve exchange order book. Understanding how the two differ helps you choose the path that fits how you want to buy.
See the differenceLarger trades are different Buying a significant amount of Sei in one go can move an exchange’s order book against you. OTC execution is built for size filling large orders without that market impact.
About OTC tradingA plain-English look at what it is, how it works, and what it's used for — so you can understand the asset before you buy.
Sei (SEI) is a Layer-1 blockchain designed specifically for high-performance trading applications, including decentralised exchanges and other latency-sensitive DeFi platforms. The project was announced in May 2022 by Jayendra Jog and Jeff Feng, and its Pacific-1 mainnet launched on August 16, 2023 with SEI airdropped to early users. SEI has a maximum token supply of 10 billion.
How the
Sei
works
Sei’s original architecture (Sei V1) was built on the Cosmos SDK using Tendermint consensus, with two core innovations: Twin-Turbo Consensus, which reduces the time needed to finalise blocks, and built-in transaction parallelisation, which processes independent transactions simultaneously rather than one at a time. Together, these were designed to give Sei the low latency and high throughput required by trading-focused applications. In May 2024, the Sei V2 upgrade added compatibility with the Ethereum Virtual Machine, allowing Solidity smart contracts to be deployed on Sei. It also introduced optimistic parallelisation assuming transactions don’t conflict and processing them in parallel by default, only resolving conflicts when they actually occur and SeiDB, a redesigned storage layer aimed at reducing state growth and improving node performance. A further upgrade approved in 2025, known as SIP-3 or ‘Sei Giga’, is transitioning the network to become EVM-only by mid-2026 deprecating Sei’s original Cosmos-native transaction types, CosmWasm smart contracts, and IBC cross-chain transfers in favour of a fully EVM-based environment. Sei’s own native oracle is also being replaced by external oracle providers including Chainlink and Pyth as part of this transition. On its current mainnet, Sei supports a theoretical maximum of 12,500 transactions per second with finality under 400 milliseconds; the Giga upgrade targets substantially higher throughput.
What
Sei
is used for
SEI pays for gas on the network covering transaction fees for both the legacy Cosmos-based environment and the EVM environment during the transition period, and exclusively for EVM transactions once the Sei Giga transition completes. SEI can be staked to validators to participate in network security and earn staking rewards, and carries governance rights over network parameters and upgrade proposals, including the SIP-3 transition itself. Sei hosts an ecosystem of more than 200 decentralised applications spanning DEXs, lending protocols, and gaming platforms, with total value locked exceeding $400 million as of 2026. The network’s focus on trading performance has made it a venue of choice for applications requiring exchange-like speed on-chain.
Built for trading performance. Sei was designed from the outset for high-frequency, latency-sensitive applications like decentralised exchanges, using Twin-Turbo Consensus and transaction parallelisation. Transitioning to EVM-only. Originally a Cosmos SDK chain with EVM compatibility added via Sei V2, Sei is transitioning to a fully EVM-only environment under the SIP-3 / Sei Giga upgrade by mid-2026. High throughput. Sei supports a theoretical maximum of 12,500 transactions per second with sub-400ms finality on its current mainnet, with the Giga upgrade targeting significant further increases. Fixed maximum supply. SEI has a maximum supply of 10 billion tokens. Approximately 5.3 billion are in circulation as of March 2026, with the remainder on a multi-year vesting schedule. Established DeFi ecosystem. Sei hosts 200+ decentralised applications with over $
Institutional custody Your assets are held by Fireblocks the custody infrastructure used by leading global banks and digital asset platforms using multi-party computation and hardware isolation. Your crypto is kept strictly separate from operational funds.
Custody by FireblocksSpeak to your broker A dedicated broker walks you through how buying Sei works and answers your questions. No order books, no charts, no guesswork.
One broker, start to finishAUSTRAC registered Uptrade is registered with AUSTRAC as a Digital Currency Exchange Provider and operates under its regulatory obligations. The registration number is published and verifiable. DCE100856266-001
DCE100856266-001You can buy Sei through Uptrade with the help of a dedicated broker. Rather than trading on a self-serve exchange, you work directly with a broker who guides the purchase from start to finish and settles your SEI into institutional custody.
There’s no single right way it depends on how much you’re buying and how hands-on you want to be. Buying through a broker suits people who want guidance rather than a self-serve order book, larger purchases, or institutional custody. Compare broker and exchange to see what fits your situation.
Your Sei is held in institutional custody secured by Fireblocks, using multi-party computation and hardware isolation and every transaction requires direct broker-led approval.
Yes. Larger purchases are handled through OTC execution, which is designed to fill size without the slippage that a large order can cause on an exchange order book.
Sei Giga, part of the SIP-3 proposal approved in 2025, is a multi-phase transition to make Sei a fully EVM-only blockchain by mid-2026. It removes the network’s original Cosmos-native transaction types, CosmWasm smart contracts, and IBC cross-chain transfers, replacing Sei’s native oracle with providers like Chainlink and Pyth, and targets a major increase in transaction throughput.
No. Many Uptrade clients are buying crypto for the first time. Your broker walks you through every step, so there’s nothing you need to know in advance.
Uptrade is registered with AUSTRAC as a Digital Currency Exchange Provider (DCE100856266-001) and operates in compliance with its regulatory obligations.
A consultation costs nothing and commits you to nothing. Ask the hard questions your broker will walk you through exactly how it works.
