STO vs ICO vs IEO
Three acronyms, one blockchain, opposite legal substance. One of them sells enforceable rights under securities law; the other two sell tokens and hope. Here is the split that decided which of them survived.
The verdict, up front
An STO sells a real security – equity, debt, or revenue rights – as a compliance-gated token under securities law, to verified investors, with enforceable documents behind it. A 2017-era ICO sold a new coin with no claim attached, to anyone with a wallet – which is why the era ended in enforcement. An IEO wrapped the same instrument in a crypto exchange's vetting and KYC. If you are raising capital against a real business or asset, it is a security everywhere that matters – the STO is not one of three options; it is the compliant version of the thing you are doing.
| STO (security token) | ICO | IEO | |
|---|---|---|---|
| What is sold | A regulated security – equity, debt, revenue share, or fund interest – issued as a compliance-gated token. | A new coin or 'utility' token, usually pre-product, with no legal claim on anything. | The same kind of token as an ICO, but sold through a crypto exchange's launchpad. |
| Legal footing | Securities law, by design: sold under exemptions (Reg D/S/CF/A+ in the US, prospectus exemptions in the EU) with KYC and investor eligibility enforced. | Usually none claimed – which is why regulators later reclassified many ICO tokens as unregistered securities. | The exchange adds vetting and KYC, but the instrument itself typically still isn't a registered security. |
| Who can invest | Eligible, verified investors per the exemption – accredited investors, or the public via Reg CF/A+ routes. | Anyone with a wallet (the core of the problem). | Exchange users who pass its KYC, often with geo-blocks. |
| Investor's claim | A real one: shares, distributions, repayment – written in offering documents and enforced by the token's own transfer rules. | Whatever the whitepaper implies – rarely enforceable. | Same as an ICO: the token's utility and market price. |
| Transferability | Compliance-gated: the token itself blocks ineligible holders; lock-ups (e.g. Rule 144) are enforced on-chain. | Freely transferable from day one. | Freely transferable after listing, per exchange rules. |
| Era & track record | The institutional era: the mechanics behind today's $33B+ tokenized-RWA market and regulated ATSs. | Peaked 2017–2018; most tokens went to zero and enforcement followed. | The 2019–2021 refinement of the ICO – better vetting, same instrument. |
| When it fits | Raising real capital against a real asset or company, compliantly, from investors who expect enforceable rights. | Bootstrapping an open crypto network where the token is genuinely consumptive – a narrow, real category. | Crypto-native projects wanting exchange distribution and liquidity at launch. |
Go deeper: security vs utility tokens ·the US exemptions compared ·jurisdiction guides ·how Raisable prepares a compliant STO
Questions this raises
Answered plainly.
What is the difference between an STO and an ICO?
An STO (security token offering) sells a real security – equity, debt, or revenue rights – as a compliance-gated token under securities law, to verified eligible investors, with the rights written in offering documents. A 2017-era ICO sold a new coin with no legal claim attached, to anyone with a wallet. Same blockchain plumbing, opposite legal substance – which is why regulators shut down ICOs that were securities in disguise while STOs became the basis of today's regulated RWA market.
Is an IEO safer than an ICO?
Marginally – an IEO (initial exchange offering) runs through a crypto exchange's launchpad, which adds vetting, KYC, and instant listing. But the instrument is typically still a utility-style token, not a registered security: the investor's protection comes from the exchange's diligence, not from securities law. For a claim on a real asset or company, the STO is the only one of the three built for it.
Are STOs and DSOs the same thing?
Yes – DSO (digital security offering) is simply another name for an STO, emphasizing that the security's official record lives on-chain. The terms are used interchangeably across the industry.
Which route should a company raising capital use?
If you are selling a claim on a real business or asset – equity, debt, revenue share – it is a security in every serious jurisdiction, and the STO route (exemptions, verified investors, licensed intermediaries, compliance-gated tokens) is the only one that survives regulatory contact. ICOs and IEOs exist for genuinely consumptive network tokens, which most fundraising tokens are not. When in doubt, get a classification opinion before launch, not an enforcement letter after. General information, not legal or investment advice. Whether any token is a security depends on its structure and applicable law – see Legal & disclosures .
Primary sources: SEC v. W. J. Howey Co., 328 U.S. 293 (1946) – Cornell LII · Securities Act, section 5 - registration – 15 U.S.C. 77e.
