IDO vs ICO vs IEO
IDO vs ICO vs IEO is one question asked three ways: who runs the token sale, and who holds the money while it runs. In an ICO the project runs it and holds the funds. In an IEO a centralized exchange does both. In an IDO the sale settles through smart contracts on a decentralized exchange. Everything else follows from that.
The 30-second version
The project sells tokens from its own website and keeps custody of the funds. No gatekeeper, no vetting, no listing promise. The format of the 2017 boom.
A centralized exchange hosts the sale, holds the funds, vets the project and lists the token on its own order book. The 2019 correction.
The sale settles through smart contracts and the token lists in a DEX liquidity pool at launch. Since 2019, the default public-round format.
Each format was a reaction to the failures of the one before it, which makes the history the fastest way to understand the differences. Nine dates cover the whole arc.
- The first ICO
Mastercoin runs the first recognizable token sale, raising around 4,700 BTC, roughly half a million dollars at the time.
- Ethereum's ICO
Over 42 days, Ethereum sells about 60 million ETH at roughly $0.31 each, raising $18.3 million and giving the format its template.
- The DAO Report
The SEC states that US securities law can apply to token sales. The warning shot of the era.
- China bans ICOs
The People's Bank of China declares ICOs illegal fundraising and orders projects to refund buyers.
- EOS closes at $4.1B
The largest ICO ever recorded ends after a year-long rolling sale. Together with Telegram's $1.7 billion private raise, two projects account for $5.8 billion.
- The IEO wave begins
Binance Launchpad's BitTorrent sale, about $7.2 million, sells out both sessions in under 15 minutes and gives the IEO its name recognition.
- 22 seconds
Fetch.ai raises $6 million on the same platform in 22 seconds. Of 19,860 submitted buy orders, 2,758 are filled.
- The first IDO
Raven Protocol sells 3 percent of its supply on Binance DEX with a $500,000 hard cap. The allocation clears in seconds.
- The ICO era's bill arrives
Telegram settles with the SEC: $1.2 billion returned to investors plus an $18.5 million penalty. Block.one had already paid $24 million over EOS; Kik later paid $5 million.
ICO: the project sells, the project holds
An initial coin offering is the simplest possible sale. The project publishes an address, buyers send funds, and the team holds the money from the first minute.
Ethereum ran the defining ICO in 2014: a 42-day open sale, about $18.3 million raised, tokens delivered at network launch a year later. It worked because the team shipped. The 2017 bull market industrialized the format without that last part. Thousands of projects raised billions against a whitepaper and a countdown timer, with no vetting, no custody protections and often no working product. A widely cited Statis Group study classified roughly 80 percent of 2017's ICO projects as scams.
The structural flaw was custody plus anonymity: buyers wired money to a team that faced no gatekeeper before the sale and no obligation after it. Regulators answered in sequence. The SEC's DAO Report in July 2017 established that US securities law could reach token sales, China banned the format outright that September, and the enforcement wave that followed settled the rest: Block.one paid a $24 million penalty over the $4.1 billion EOS sale, Kik paid $5 million, and Telegram returned $1.2 billion to its investors. As a US-facing public format, the 2017-style ICO did not survive. The word did, which is why people still say "ICO" when they mean any token sale.
IEO: the exchange steps in
An initial exchange offering moves the whole sale inside a centralized exchange: its platform, its custody, its vetting, its listing.
Binance had quietly hosted two Launchpad sales in late 2017, but the format got its name and its wave in January 2019, when the BitTorrent sale sold out both of its sessions in under 15 minutes for about $7.2 million. A month later Fetch.ai raised $6 million in 22 seconds. Within months, Huobi, OKEx and KuCoin had cloned the model.
The IEO fixed the ICO's two worst defects directly. Custody moved from the project's wallet to the exchange, and a listing team with reputational skin in the game vetted each sale, with the token trading on the exchange's own order book the moment it closed. What it cost was access. You needed an account on that specific exchange, completed KYC, usually a holding of the exchange's own token, and then luck: in the Fetch.ai sale, roughly one submitted order in seven was filled. The exchange had become the gatekeeper, and demand for its gate was the product. The frenzy faded within the year, and the format settled into what it still is: a listing pipeline for exchanges rather than an industry-wide standard.
IDO: the sale moves on-chain
An initial DEX offering settles the sale through smart contracts and lists the token in a decentralized exchange's liquidity pool, open to anyone with a wallet.
The first IDO was small and fast: Raven Protocol sold 3 percent of its supply on Binance DEX in June 2019, a $500,000 hard cap that cleared in seconds. The format found its real footing in 2020, when automated market makers made listing permissionless. Any project could seed a Uniswap-style pool and have a live market the same hour, no listing negotiation required.
Permissionless cut both ways: the venue that admits everyone also admits rug pulls. Launchpads emerged to put a vetting and allocation layer back on top, whitelists, tiers and lotteries deciding who buys before the pool opens. That machinery, and the risks that come with it, are covered step by step in what is an IDO. Mid-sale custody sits with the sale contract rather than any company, and the token starts trading at the token generation event, when the pool is seeded. It is the format the industry kept.
ICO vs IEO vs IDO, side by side
Four axes decide everything: venue, custody, vetting and access. The rest is detail, so the detail is here too.
| Property | ICO2017 era | IEO2019 era | IDO2019 onward |
|---|---|---|---|
| Venue | The project's own website. | A centralized exchange's launchpad. | A DEX liquidity pool, usually via a launchpad. |
| Who runs the sale | The project itself. | The exchange, end to end. | A launchpad or the project, settled on-chain. |
| Custody mid-sale | The project's wallet. | The exchange. | The sale's smart contract. |
| Vetting | None. Buyer trust only. | The exchange's listing team. | The launchpad. Quality varies widely. |
| Access | Anyone with a wallet, first come first served. | Exchange account, KYC, usually the exchange's token, then a lottery. | A wallet plus the launchpad's tier, whitelist or lottery. |
| Liquidity at listing | None promised. Listing came later, if at all. | The exchange's own order book. | A DEX pool, seeded at TGE. |
| Landmark sale | EOS: $4.1B over twelve months. | BitTorrent: $7.2M in under 15 minutes. | Raven Protocol: $500K cap, cleared in seconds. |
| Typical failure mode | Team disappears with the raise. | Weak demand, later delisting. | Rug pull or a thin, volatile pool. |
| Status in 2026 | Dead as a format. Survives as a word. | Alive on exchange launchpads, often reshaped into launchpool formats. | The default public-round format. |
Read down the custody row and the arc is obvious: funds moved from a founder's wallet to an exchange to a contract. Read down the access row and the second arc appears: the door went from wide open to rationed. What no row shows, because no format ever solved it, is whether the token behind the sale is worth buying. That judgment stayed exactly where it was in 2013: with you.
Which still matters in 2026
One died, one narrowed, one became the default. And all three quietly lost their original job.
The open, unvetted 2017 sale is gone. In the EU, MiCA has required a compliant white paper for public token offers since the end of 2024; in the US, the 2019 to 2020 enforcement wave settled the question earlier. Its retail descendant is the presale, which has rules of its own: the best crypto presales 2026 guide covers how to vet one.
Exchange launchpads still run sales, but many have shifted toward launchpool formats, where users commit the exchange's token to farm an allocation instead of buying one. It is now an exchange product, not an industry standard.
When a project runs a public round today, it is usually an IDO through a launchpad. The mechanics, allocations, tiers and risks are a guide of their own: what is an IDO.
In 2017 a public sale was the fundraise. Today most projects raise their real capital in seed and private rounds months earlier, and the public sale distributes a small slice at a price those rounds already shaped. The formats survived. The moment that mattered moved.
The door before all three
ICO, IEO and IDO are all public sales: the last door into a project before open trading. By the time any of them opens, the seed round, the private sale and often a KOL round have already happened, at earlier pricing, with vesting attached. That earlier layer is where Unitypad operates. The club does not run IDOs. Deal flow is brought by the club community, and Unitypad presents seed and private crypto deals to member tiers, where holding and locking $UNITY determines which rounds you can see and what allocation you can request. Access is never a promise of an allocation, and an allocation is never a promise of returns. What keeps the judgment honest is the record: all 64 positions the club community has taken are logged by name.
IDO vs ICO vs IEO, asked directly
What is the difference between an IDO and an ICO?
In an ICO the project runs the sale itself and holds the raised funds in its own wallet, with no external vetting and no listing commitment. In an IDO the sale settles through smart contracts on a decentralized exchange, usually via a launchpad that vets the project and manages allocations, and the token starts trading in a DEX pool at launch.
Is an IEO safer than an ICO?
It removes specific risks, not risk. An IEO puts custody with the exchange instead of the project and adds a vetting layer, which cuts the exit-scam risk that defined the ICO era. The token itself can still fail, and IEO access depends on the exchange's account, KYC and allocation rules. No sale format makes a token a good investment.
Do ICOs still exist in 2026?
The open, unvetted 2017-style ICO is effectively gone, ended by enforcement in the US and, since the end of 2024, by MiCA's white-paper requirements for public offers in the EU. The word survives as shorthand for any token sale, and the format's retail descendant is the presale, which typically runs with KYC, structured rounds and vesting.
Which came first: ICO, IEO or IDO?
The ICO came first: Mastercoin in July 2013, with Ethereum's 2014 sale defining the template. Exchange-hosted sales existed as early as late 2017, but the IEO got its name and its wave with Binance Launchpad's BitTorrent sale in January 2019. The first IDO followed in June 2019, when Raven Protocol sold on Binance DEX.
Before all
three.
ICO, IEO, IDO: every one is a public sale, the last door in. Unitypad members enter earlier, at seed rounds and private sales brought by the club community, through documented member tiers, with all 64 club positions on the public record.