An IEO — an initial exchange offering — is a token sale run by a centralized crypto exchange. Instead of the project selling tokens itself, the exchange hosts the sale on its own platform: it vets the project, handles payments and identity checks, sells the tokens to its users, and then lists the token on its own exchange. In short, an IEO is an ICO with a gatekeeper.
The model was built to fix the biggest problem of the 2017 ICO boom: trust. In the open ICO era, anyone could raise money with a whitepaper and a smart contract, and buyers had no way to tell serious projects from scams. An IEO answers that by putting the exchange's reputation on the line: listing a project implicitly says it passed the exchange's checks. That promise is the whole point of the model — and its main limitation.
An IEO follows a fixed sequence. First, the project applies to the exchange's launch platform and passes due diligence: the exchange reviews the team, tokenomics, code, and legal structure. Approved projects get a sale date and a fixed price. Next, participation opens, usually only to verified users. Many IEOs require holding the exchange's token or winning a lottery for an allocation, since demand usually exceeds supply. Buyers pay through the exchange with its token or a stablecoin, and tokens are credited to their exchange accounts. Finally, the token lists on the same exchange within days.
Notice what is different from an ICO. The buyer never interacts with the project's own smart contract, never sends funds to a project-controlled address, and never wonders whether the sale page is real. The exchange handles custody, settlement, and the listing. That convenience is the product. Our guide to what a token presale is explains how the earliest sale rounds differ from this exchange-run format.
IEOs appeared because the ICO model broke. By 2018, the ICO market had collapsed under the weight of scams, failed projects, and regulatory pressure. Buyers had lost trust, and serious projects had lost a credible way to raise funds. Exchanges saw an opening: they had the users, the liquidity, and the compliance infrastructure to offer token sales as a service. The exchange would do the vetting, and its users would get first access to new tokens.
Binance Launchpad popularized the IEO in early 2019. Its first sale, BitTorrent Token (BTT), sold out in minutes in January 2019, and the sales that followed — Fetch.ai, Celer Network, and others — did the same: a fixed price, a short window, enormous demand, and a token listed on Binance almost immediately. Other exchanges copied the model within months, and for a while in 2019 the IEO was the default way a new token reached the market.
The wave also revealed the model's weak point: access. Because demand dwarfed supply, exchanges rationed allocations through lotteries and token-holding requirements. Most users who wanted in could not get an allocation at all, and those who did often received a small one. The IEO solved the trust problem by centralizing the sale, and in doing so it recreated the exclusivity problem that ICOs had originally removed.
The difference between an IEO and an ICO comes down to who runs the sale. In an ICO, the project runs it: it publishes the terms, collects the funds, and distributes the tokens. Anyone with a wallet can join, and anyone can also be scammed. In an IEO, the exchange runs it: it vets the project, collects the funds, and lists the token. Access is limited to the exchange's users, but the vetting and the listing are built in.
That makes IEOs safer on average but narrower in reach. An ICO can raise from the whole world; an IEO only from the exchange's user base. An ICO lists wherever it can afterwards, sometimes nowhere; an IEO lists on the host exchange by design. And an ICO needs no permission, while an IEO needs the exchange's approval — which is why most projects never get one. Our comparison of presale vs ICO vs IDO puts the three models side by side.
The IDO — an initial DEX offering — is the decentralized answer to the same problem. Instead of a centralized exchange running the sale, the sale happens on a decentralized exchange: tokens are sold into a liquidity pool, and trading starts the moment the pool opens. IDOs keep the openness of ICOs — anyone with a wallet can join, no account needed — while giving buyers an immediate market, which ICOs lacked.
The practical difference is who you trust. In an IEO you trust the exchange's vetting and its custody. In an IDO you trust the smart contract and your own checks, because nobody vets the listing for you. IEOs are more curated and more restricted; IDOs are more open and more exposed. Launchpads have since blended the two: a platform that vets projects like an exchange, but runs the sale on-chain like a DEX.
An IEO is not a guarantee — buyers should not treat the exchange's name as a safety net. First, vetting is not a promise of returns: the listing price is a target, and the market may open below it. Second, allocations are small and rationed, so gains from one IEO are usually modest. Third, the token often depends on the host exchange's ecosystem — a delisting can drain its liquidity. Fourth, the same basic checks still apply: tokenomics, vesting, and a real product.
The checklist before joining any token sale still applies. Confirm the total supply and how much is being sold. Check whether the contracts are audited and the team is public. Look for a live product, not just a roadmap. And size the purchase as a high-risk allocation — never money you need elsewhere. Our guide on how to spot a good presale covers the full checklist.
IEOs still run on the big exchanges, but they are no longer the default route for new tokens. Most launches today happen on launchpads, where the sale is open to anyone with a wallet and the token starts trading on a bonding curve or in a pool the moment the sale fills. The launchpad keeps the useful part of the IEO — a standard sale format and a real product behind it — without the lottery and the account requirement.
Phew works that way. The $PHEW presale is a staged public sale: Stage 1 is $0.01, rising about 20% per stage to $0.0516, with a stated listing target of $0.258. Stage 1's tiered bonus runs +10% under $250, +25% at $250+, +50% at $1,000+, +75% at $2,500+, and +150% at $10,000+ — so $100 in Stage 1 buys 11,000 $PHEW. No vesting: allocations unlock 100% at launch. Payment across 11 chains, October 16 to December 31, 2026. See the PHEW presale stages explained for the full schedule, or join at phew.pro/presale.
IEO stands for initial exchange offering: a token sale hosted and run by a centralized crypto exchange, which vets the project and lists the token afterwards.
In an ICO the project runs the sale itself and anyone can join. In an IEO the exchange runs the sale, vets the project, and limits participation to its own verified users — with a listing on that exchange built in.
Yes. IEOs run on the exchange's own platform, so you need a verified account there, and usually you need to hold the exchange's token or win a lottery to receive an allocation.
On average, yes, because the exchange vets the project and handles the sale. But vetting is not a guarantee of returns, and the listing price can still open below the sale price.
Stage 1 is $0.01 with a tiered bonus of up to 150%, rising each stage to $0.0516 — and the stated listing target is $0.258, with 100% unlock at launch.
Join the presale