DeFi vs. SEC: Should Non-Custodial Platforms Be Regulated Like Exchanges?
The debate over how decentralized finance should be regulated has resurfaced, this time focusing on whether non-custodial DeFi platforms ought to be treated the same as traditional securities exchanges.
At the center of the clash are two very different visions of market structure. On one side, DeFi advocates argue that autonomous code and non-custodial tools are fundamentally unlike intermediaries and therefore fall outside existing exchange rules. On the other, major Wall Street players insist that if a platform helps trade tokenized securities, it should face the same regulatory obligations as any other venue handling those assets.
DeFi advocates push back on “intermediary” label
On April 1, the DeFi Education Fund (DEF), a policy and advocacy organization focused on decentralized finance, submitted a detailed letter to the U.S. Securities and Exchange Commission. The group urged the regulator not to treat decentralized protocols and non-custodial platforms as if they were traditional exchanges or broker-dealers.
DEF’s legal officer, Ayan Dow, stressed that tools which simply provide liquidity or operate autonomously through smart contracts are not “performing exchange functions” in the conventional sense. Because these systems do not hold customer assets or exercise discretionary control over trades, DEF argues they should not be regulated as if they were middlemen standing between buyers and sellers.
The core of DEF’s argument is definitional: in their view, a non-custodial application does not fit within the legal meaning of an “intermediary” or “exchange.” These platforms often consist of open-source code deployed on public blockchains, with no central operator managing order flow or assets. Users interact directly with the protocol, retaining control of their funds through their own wallets.
The burden on developers
A major concern raised by DEF is the potential impact on software developers. If the SEC were to classify protocol creators as intermediaries merely because they wrote or deployed the code behind non-custodial platforms, developers could face heavy compliance obligations without actually controlling the systems in question.
In many DeFi architectures, once smart contracts are deployed, they become self-executing and non-upgradeable, or any upgrades are governed collectively by token holders rather than by a single developer or company. Treating these developers as if they were running an exchange, DEF argues, would impose an “overwhelming regulatory burden” on individuals who do not have the practical ability to monitor transactions, perform know-your-customer checks, or freeze assets.
Because of this, DEF urged the SEC to clearly carve out “disintermediated software” from the scope of any new rules. That would include automated market makers (AMMs), smart contracts that execute trades algorithmically based on liquidity pools, and developers who do not retain control or custody over user assets.
Wall Street’s call for a “level playing field”
DEF’s letter was, in part, a direct response to positions taken by the Securities Industry and Financial Markets Association (SIFMA), a prominent trade group representing traditional financial institutions.
SIFMA has argued that the SEC should regulate DeFi platforms and AMMs not based on how decentralized they are, but on what they actually do in the market. From that perspective, if a protocol facilitates trading in tokenized securities, it should fall under the same regulatory umbrella as centralized venues offering comparable services.
According to SIFMA, this approach would preserve “technology neutrality” in securities regulation: rules should apply uniformly to similar economic activities, regardless of whether they are enabled by centralized databases or public blockchains. In that sense, the group is less concerned about the label “DeFi” and more focused on the underlying function-trading, matching orders, or enabling price discovery in securities markets.
Citadel’s alignment with stricter DeFi oversight
SIFMA’s stance mirrors earlier calls from Citadel Securities, one of the largest market makers in traditional finance. In the previous year, Citadel publicly urged regulators to apply strict oversight to DeFi platforms involved in trading tokenized securities.
Citadel’s position is framed as a defense of investor protection and market integrity. The company points to a series of high-profile failures, hacks, and scams in the crypto and DeFi sectors as evidence that loosely regulated trading venues can pose substantial risks to retail participants.
However, there is also a structural element at play. Citadel earns a large share of its revenue by acting as a centralized intermediary, particularly for major retail brokerage platforms. A world in which DeFi substantially reduces or eliminates intermediaries could directly challenge that business model. From DEF’s perspective, this creates an inherent conflict of interest: traditional players that profit from intermediation may be incentivized to oppose technological models designed to minimize middlemen.
Competing narratives: investor protection vs. innovation
Both sides of the discussion invoke investor protection and fairness, but they define these aims differently.
Supporters of stricter regulation argue that anyone facilitating securities trading-human or software, centralized or decentralized-should be subject to standards that safeguard investors. They highlight the opacity of many DeFi projects, the prevalence of rug pulls, and the difficulty of recovering funds once smart contracts are exploited. In their view, leaving tokenized securities trading in a lightly regulated environment invites abuse and undermines trust in markets.
DeFi proponents, however, counter that overbroad regulation could stifle innovation and entrench existing financial power structures. They contend that open-source, transparent smart contracts can provide a different kind of investor protection: code that behaves predictably, without hidden fees or conflicts of interest, and without the risk of a centralized operator misusing customer assets. From their standpoint, equating non-custodial code with intermediaries ignores the core innovation of DeFi-removing the very middlemen that traditional regulation is built around.
What exactly is a “non-custodial” platform?
A key practical question for regulators is how to define “non-custodial” in a way that reflects technological reality.
Non-custodial platforms typically allow users to interact with financial services directly from their own wallets, meaning they never surrender control of their private keys to a third party. Automated market makers manage liquidity pools and execute trades via smart contract logic, but they do not take possession of user assets in the same way a centralized exchange does.
Yet the line is not always clear. Some DeFi interfaces are run by companies that can restrict access, charge fees, or coordinate governance, even if the underlying contracts are decentralized. Others retain admin keys that allow upgrades or pauses. This grey area complicates any attempt to draw a simple regulatory distinction between “custodial” and “non-custodial” platforms.
Potential models for regulation
The SEC faces a difficult balancing act as it designs any “innovation exemption” or bespoke framework for tokenized securities.
One possible outcome is a functional approach that focuses on the degree of control and discretion a platform or team exercises. Fully autonomous contracts with no upgrade authority might be treated differently from systems where a core team can unilaterally change parameters, freeze user funds, or redirect fees.
Another approach could involve tiered obligations. Front-end operators that provide a user interface to otherwise autonomous contracts might be subject to certain requirements (such as disclosures or geofencing), while the underlying protocol layer remains outside the traditional exchange regime. This could preserve some room for permissionless innovation while still giving regulators touchpoints to address investor risk.
Implications for builders and investors
How the SEC resolves this debate will shape the future of DeFi development in the United States.
If non-custodial platforms are broadly categorized as exchanges, many U.S.-based teams may decide not to launch or maintain DeFi projects, fearing legal liability or the cost of full regulatory compliance. That could push more innovation offshore, with protocols being built and governed entirely outside U.S. jurisdiction.
On the other hand, a well-calibrated framework that recognizes the unique properties of autonomous code could give legitimate builders more clarity and confidence. DeFi projects that are serious about long-term sustainability might be more willing to adopt certain guardrails-such as transparent governance, robust audits, and clear risk warnings-if they know what regulators expect.
For investors, the outcome will influence which kinds of platforms remain accessible and how much due diligence they will need to perform on their own. A tighter regime might limit access to high-risk, experimental DeFi tools but could also reduce exposure to outright frauds. A looser regime would preserve maximum choice but continue to put the burden of risk assessment on individual users.
The broader stakes for tokenized securities
Beyond DeFi itself, this dispute is also about the future of tokenized securities-traditional financial instruments represented on blockchains.
If tokenized assets are confined to heavily regulated, centralized venues, they may end up looking similar to today’s markets, just running on different infrastructure. If, instead, they can trade on permissionless, non-custodial protocols, a more open and globally accessible financial ecosystem could emerge, with 24/7 markets and lower barriers to entry.
SIFMA, Citadel, and other incumbents highlight systemic risk and regulatory consistency. DeFi advocates highlight competition, efficiency, and the possibility of reducing reliance on large financial intermediaries. The SEC will have to decide how much weight to give each of these considerations as it refines its policy.
What comes next?
The Commission is expected to continue gathering input from both traditional institutions and DeFi advocates as it drafts rules or exemptions related to tokenized securities and decentralized trading.
The final framework will likely attempt to reconcile three competing goals: maintaining investor protection, ensuring fair and orderly markets, and not shutting down promising financial innovations before they can mature. Whether non-custodial platforms are ultimately treated like exchanges-or recognized as something fundamentally new-will be a decisive factor in how far DeFi can go within regulated markets.
For now, the standoff between DeFi proponents and Wall Street underscores a larger question: should regulation adapt to new technology, or should new technology be forced to fit into old regulatory molds? The SEC’s answer will resonate far beyond DeFi, shaping the broader evolution of digital finance in the years ahead.