On‑Chain Reputation in Web3: DeBank, Lens, and the New Identity Layer Without KYC

Originally, cryptocurrencies were developed to be trustless. This means that users interacting with digital assets would not have to trust anyone - the rules would be enforced by code and algorithms, rather than individuals, companies, or even governments. However, just because the system is trustless, it doesn’t mean that you don’t care who you are dealing with.

That is also a problem, because the initial crypto industry brought anonymity to participants, which eventually grew into pseudonymity. Still, this was not good enough for the security of users and their funds. An NFT marketplace doesn’t know if the seller is legitimate or a serial scammer. A DAO has no way of knowing if a new voter is an actual contributor or a Sybil bot that runs 50 wallets in the background.

Even the Decentralized Finance (DeFi) sector’s lending protocols have no idea if an anonymous user is repaying their loans responsibly. As such, they don’t know if they should offer them better rates reserved for trustworthy customers.

This is a problem that developers have been trying to solve for a long time now. The trick is to do it in a way that protects the user’s privacy while still giving Web3 services some sort of guarantee that the user is trustworthy, which is where on-chain reputation enters the picture. Instead of identity, on-chain reputation focuses on the user’s wallet history, using it to prove that the user has a verifiable track record. Best of all, it can be done without KYC.

What On-Chain Reputation Really Means

First, we should consider the core concept behind on-chain reputation and what it has to do with one’s crypto wallet.

Your Wallet History is a Digital Track Record

As mentioned, on-chain reputation is a way to measure how trustworthy a user is. This is based on their past activities as recorded through their wallet’s behavior over time. So, instead of using an official, government-issued document like a driver’s license or a passport, you would use your on-chain activity to build your reputation.

Crypto wallets record everything - all transactions, governance votes, every NFT purchase or loan repayment, even interactions with dApps. What’s more, that is all available in the public record, so anyone can view it and verify the behavior of a specific wallet. This might sound unusual to those only familiar with traditional credit scores. However, it is a reliable way to create a behavioral passport that reflects the wallet owner’s reputation without collecting sensitive information.

Attestations, Soulbound Tokens, and Decentralized IDs

In order to make the reputation system possible, several technologies have been put into place. Attestations, for example, represent statements that can be verified and are issued by trusted entities. Through these statements, they confirm certain actions and/or achievements, like completing courses or contributing to projects. One example is the Ethereum Attestation Service that allows applications to issue on-chain attestations. These can be used to prove claims without having to use a centralized database to do so.

Then, there are Soulbound Tokens (SBTs). These are non-transferable tokens that were created to act as unique credentials. Essentially, they are linked to a specific wallet, and they are permanently tied to it. As such, you can’t buy them or sell them. This could make them useful in scenarios where something unique needs to be issued digitally. For example, a university could use SBTs as digital diplomas. Another example could see a DAO use them to recognize long-term contributors without those credentials being transferred to someone else.

Finally, there are Decentralized Identifiers, or DIDs, which enable a framework for managing digital identities in different applications. At the same time, they allow users to control their data. Projects like Spruce ID use them to let users log into different Web3 services and stay in control of their identity. These technologies act as building blocks for on-chain reputation. Through them, Web3 services can check out the user’s history and determine if they are trustworthy and responsible or a risky customer.

Where Things Stand in 2025-2026

While the crypto sector was initially quite excited about on-chain reputation, it has not yet become a daily tool, even for mainstream crypto users as of 2026. The infrastructure is there, but the adoption is still mostly limited. The main reason for this is the fact that the industry doesn’t have a simple and important enough reason for an average user to work on maintaining a reputation profile.

That’s not to say that reputation doesn’t play a role anywhere. It could be really useful for things like undercollateralized DeFi lending. In most situations where users lend money, both in fiat and crypto environments, they must provide collateral. However, on decentralized platforms, the situation is worse because protocols cannot collect the user’s data and measure how trustworthy they are. As a result, a borrower often has to provide more collateral than they borrow.

This could be solved with a reputation system that would tell the protocol that the user has a good reputation when it comes to paying off their debts. Even so, it is important to note that current reputation systems have their limitations. DeBank’s rankings, for example, can offer useful insight into wallet activity, but they mostly measure factors like the size of the portfolio or ecosystem participation. This doesn’t guarantee that the user is trustworthy; it merely suggests that they are a serious player.

On the other hand, Lens Protocol has created the technical foundation for Web3 identity, but it has a small user base. So, the problem is not to create a reputation system; it lies in making people care about them enough to use them.

Can users manipulate on-chain reputation with multiple wallets?

Yes, it is possible to use multiple wallets to manipulate one’s onchain reputation. In fact, with systems that only measure basic activity metrics, it can be quite easy. Creating many wallets lets bad actors artificially inflate participation. They can even use the wallets to collect rewards. This is known as Sybil behavior, and it is why current reputation systems combine multiple signals to assess if the wallet is legitimate.

Projects Building Web3 Reputation Today

There are quite a few projects live today that are perfect for building a strong reputation. For example:

DeBank

DeBank is a comprehensive Web3 portfolio tracker and DeFi analytics platform. However, the project expanded beyond this into becoming a broader on-chain identity platform. This started two years ago, in July 2024, when it launched DeBank Chain. This is an OP Stack-based Layer 2 that settles to Ethereum. At the same time, it offers an XP loyalty program, which has already distributed around 5 million XP points to active users.

DeBank doesn’t operate as a traditional credit score. Instead, it evaluates the user’s wallet activity and protocol usage to build a profile.

Lens Protocol

Then, there is Lens Protocol, which is a decentralized, open-source social graph for Web3. Its focus is on portable social identity, and in April 2025, the project migrated 650,000 user profiles and almost 12 million posts to Lens Chain. This was around 125 GB of content that needed to be moved to a new chain powered by zkSync technology and Avail. However, instead of locking users into a single platform, Lens Protocol allows creators to carry over things that matter, such as social identity, followers, and even content.

Gitcoin Passport

The next option for building one’s reputation is Gitcoin Passport. As the name suggests, Gitcoin introduced it as its response to Sybil attacks. Gitcoin Passport allows it to stop the attacks without having to force users to go through traditional ID verification. The way it works is fairly simple - users collect verifiable credentials from different sources to build a trust score. The method proved to be a huge success, as Sybil donations reportedly dropped by around 90% after Passport was integrated into Gitcoin Grants. Furthermore, over $50 million in grants was distributed with Passport-based filtering.

Nomis

Nomis is another great choice to consider. This is an on-chain reputation protocol that assigns 0 to 100 scores to Web3 wallets based on their transaction history. It analyzes more than 30 parameters, including the wallet’s balance, age, transaction volume, repayment behavior, and alike. Protocols like Lista DAO have been using Nomis scores as one of the signals for evaluating wallet quality and its user’s past activity. It can reach over 50 major chains and give DeFi applications a standardized way to assess wallet quality without having to rely on centralized credit bureaus for data.

ENS

Finally, there is Ethereum Name Service, or ENS. This protocol is mainly known for replacing long wallet addresses consisting of numbers and letters with readable .eth names. This is an important change that can reduce the number of incorrectly typed addresses, which commonly occur due to human error. With that said, the project also serves as an identity layer, since it attaches a name to a wallet. This can make it easier for individuals, communities, and even apps to recognize trusted identities, since names are far more memorable than seemingly random wallet addresses.

One thing to note is that ENS does not evaluate a wallet’s behavior or assign a reputation score, like DeBank, Gitcoin Passport, or Nomis. Instead, it provides a recognizable identity that other reputation systems can build on.

Each of these projects approaches on-chain reputation from a different angle. For tracking DeFi activity or building a public wallet profile, DeBank is a good place to start. If you wish to focus more on creator ownership and social identity, then Lens Protocol is a place to turn to. For developers and DAO contributors who want to avoid having to rely on KYC, Gitcoin Passport does the trick. Meanwhile, users who want a simple reputation score should try out Nomis. Lastly, if you just want to make your wallet easier to recognize and share in the Web3 space, then ENS is the easiest tool to do that.

Why On-Chain Reputation Got So Much Attention in 2022-2023

The idea of on-chain reputation got a lot of attention a few years ago, in 2022 and 2023, as this was the period when NFT and DeFi hype reached their peak. With a lot of hype came a lot of money, and that always attracts scammers, fraudsters, hackers, and other bad actors looking to exploit the situation.

The hype created problems that on-chain reputation was expected to solve, such as airdrop farming. This was considered one of the largest issues of this time. Essentially, when protocols distributed free tokens - usually for promotional purposes - many participants thought of gaming the system by creating hundreds, or even thousands or wallets. With more wallets, they were able to get more coins, which made airdrops expensive for the projects, and it created false representation of its community.

DAO governance saw similar issues. In DAO, users vote on any and all important decisions, and voting power is often based on the amount of the project’s tokens a wallet owns. With that in mind, a single large holder could severely affect decisions, as their voting power could outweigh thousands of smaller, but genuine, contributors combined.

The concept of on-chain reputation got even more attention after Ethereum’s co-founder, Vitalik Buterin, and other researchers published a paper titled “Decentralized Society: Finding Web3’s Soul” in May 2022. In fact, this paper was the origin of Soulbound Tokens, and it argued that Web3 needs a reputation system built around social relationships and achievements.

This was a compelling narrative. If a wallet were the user’s history and résumé, it could be used to verify their trustworthiness and expose the scammers without disrupting the user’s privacy.

Can a Single Wallet really replace a KYC identity check in a regulated financial context?

No, an on-chain reputation score can never be a total replacement for KYC in regulated financial systems. A wallet can show the user’s history, but it doesn’t reveal their identity. In regulated spaces where financial institutions operate, you still need KYC procedures to fully meet regulatory requirements. But, on-chain reputation could become an addition to this system and provide additional context, which could be helpful in risk assessments.

Where On-Chain Reputation Still Has Real Potential

On-chain reputation is unlikely to replace traditional identity systems entirely. However, it can still be valuable, since it can allow blockchain apps to see the user’s history and reward genuine participants without robbing them of their privacy.

DAO governance is one area where reputation systems improve decision-making. This works if DAOs use reputation in addition to token ownership, rather than relying on voting power. For example, if a contributor has written multiple proposals, completed various tasks, participated in discussions, and alike, they could be more influential than someone who just bought a large amount of tokens. This shows that they are a real, active member of the community, rather than just someone who can afford an influential vote.

DeFi lending is another area where reputation has a strong use. Reputation allows protocols to verify the repayment history of a user. Those who have successfully repaid loans in the past would be considered more trustworthy. As such, they could potentially qualify for better terms, lower collateral, and more, as the protocol has evidence of the user’s responsible behavior.

Such reputation-based filtering is also useful for airdrops and other reward systems. This works if projects combine a variety of reputation signals instead of rewarding simple activity. That way, users who run hundreds of wallets would be safely ignored, while real community members would be easier to identify.

Cross-application portability is another important advantage, as it allows different Web3 platforms to adopt reputation standards. This benefits the users, as it allows them to carry their achievements across ecosystems. It still happens that a user who has a flawless reputation on one chain remains unknown and untrusted on another. With the ability to share it across ecosystems, they could build a universal track record once, and use it everywhere they go to prove that they are trustworthy and reliable.

Conclusion

While on-chain reputation systems were created to solve specific problems, those problems are still here, still persisting, even years after the systems were created. A DeFi user who wants an undercollateralized loan still cannot easily prove that they are reliable. Similarly, projects launching airdrops still can’t reliably separate real community members from fake wallets created only to catch rewards.

The tools that can solve these problems exist, but the problem is that they aren’t being used. This means that the industry needs better adoption and stronger anti-Sybil protections.

Moving forward, it is unlikely that wallets will completely replace identity checks. However, wallet-based reputation could be integrated as another layer of trust - one that could unlock special benefits and privileges that users with no reputation or those with a bad reputation wouldn’t have access to. Assuming that this happens and that on-chain reputation becomes a reliable security layer, Web3 might finally be able to move towards creating open systems where trust comes from transparent actions. But, if that future does come to pass, the best thing to do now is to start building a strong on-chain reputation early.

For users who want to prepare for that future, the first step is simple: create a recognizable Web3 Identity early. Start with an ENS name and a Gitcoin Passport - the two fastest, lowest-risk ways to begin building a history today.