How Sumsub Leveraged Reown Authentication To Expand its Compliance Offering
How a leading verification platform embedded unhosted wallet checks into its Web SDK to meet global Travel Rule requirements
Sumsub is a full-cycle verification platform that enables fraud-free, scalable compliance. Its adaptive, no-code solution covers everything from identity and business verification to ongoing monitoring; quickly adjusting to evolving risks, regulations, and market demands.
Trusted by more than 4,000 businesses to manage identity checks, AML compliance, and ongoing monitoring, its clients include some of the largest names in crypto, such as Bitpanda, Bybit, Wirex, and TransferGo; as well as non-crypto companies like Vodafone, Avis, and Duolingo. As a leading verification provider, its solutions must be fool-proof; serving some of the biggest names in the industry means offering seamless and trusted infrastructure.
This case study dives into how Sumsub leveraged Reown authentication, including what the integration enabled, how Sumsub used it to unlock new capabilities, and why the integration was so important.
The Challenge: From Compliance Gap to Native Wallet Verification
While travel rule compliance for non-crypto companies was something Sumsub already had years of experience with, the newer regulations and infrastructure needed to support crypto clients posed a challenge.
To explain, the EU Travel Rule and equivalent frameworks require crypto companies to prove ownership of self-hosted wallets that process transactions above a certain threshold. As such, Sumsub had to find a way to allow crypto companies to prove ownership of their unhosted wallets embedded directly in their user flows and without interrupting user experience.
The question for Sumsub was how to add this capability to their platform without building custom wallet connection infrastructure. Since wallet connectivity is not their core product, building and maintaining a custom solution would have involved a significant engineering investment. This was simply infeasible for a company serving a broader client base than crypto companies.
To address this infrastructure gap and provide crypto clients with a simple and effective solution, Sumsub used Reown’s authentication feature to provide its users with wallet ownership verification for Travel Rule compliance.
Sumsub x Reown’s Approach: Wallet Ownership Proof, Embedded in the Compliance Flow
Sumsub needed a digital signature flow that:
- Proved a user controlled a specific wallet address
- Embedded into their Web SDK directly
- Provided connections to wallets their clients were already using.
Reown provided all of those prerequisites via its Authentication feature, combining wallet connection and ownership verification into a single user action.
Here’s how Reown Authentication worked for Sumsub:
One signature step to prove wallet control
When a Sumsub client's user needs to verify ownership of an unhosted wallet, Reown’s authentication flow presents a message for the user to sign. Signing the message proves control of the address without requiring the user to create a new account, share credentials, or leave the platform. Subsequently, this allows Sumsub to issue onchain attestations based on that verified ownership, meeting Travel Rule documentation requirements within a single step.
Coverage across 520+ crypto wallets without custom connectors
Sumsub's crypto clients serve users who hold assets in many different wallets. Integrating Reown Authentication gave Sumsub access to 450+ wallet providers through a single SDK integration, bypassing the need to build a custom solution for each wallet its clients requested support for.
Embedded directly in Sumsub's Web SDK
Reown Authentication had to work inside Sumsub's existing developer-facing SDK without requiring any extra setup for clients or leading them off Sumsub’s platform. Using this approach, its clients could enable wallet verification without extra steps, keeping the user experience clean and in-app.
"WalletConnect helps our crypto customers verify and connect their unhosted wallets, keeping payment flows smooth while meeting global Travel Rule requirements and issuing onchain attestations."
Kirill Bondarenko, Lead Product Manager Crypto — Sumsub
The Impact
- Wallet ownership verification added to Sumsub's Web SDKSumsub's crypto clients gained instant access to a Travel Rule-compliant wallet verification flow they could use immediately.
- 520+ wallets accessible from a single integration: Almost every wallet provider a Sumsub's client could need was supported out-of-the-box.
- Uninterrupted user experience:Reown authentication fits seamlessly together with Sumsub’s SDK’s existing flow rather than redirecting users away from the platform.
What the Team Said
The integration lives inside Sumsub's Web SDK, meaning there was no change or complication of their original user experience.
Kirill Bondarenko described the outcome:
"Integrated seamlessly into our Web SDK, it delivers a better user experience and provides access to over 520 crypto wallets unlocking broader connectivity. As our tech partner, Reown enables Sumsub's customers to safely conduct frictionless onchain payments."
Kirill Bondarenko, Lead Product Manager Crypto — Sumsub
What the integration shows more broadly: for a B2B compliance platform, adding wallet-native capabilities does not require owning the wallet infrastructure layer. Reown handled wallet connectivity, to allow Sumsub's team to focus on their core product instead.
When Compliance Tooling Meets Wallet Infrastructure
Travel Rule compliance is now a problem shared by traditional KYC infrastructure and crypto-native technology.
Sumsub's situation is a clear example: they know compliance, they serve thousands of businesses that need it, but building wallet connectors is not their core product. Its integration of Reown Authentication shows what happens when specialists combine knowledge: the compliance logic stays in Sumsub, the wallet connectivity is handled by Reown. And the customer receives the same intuitive user experience they expect from an industry leader.
So what are you waiting for? If you’re building an app that requires crypto compliance—whether you’re a crypto-native app, or a mixed audience solution just like Sumsub—consider Reown Authentication! You can control your flows, bake the functionality into your own platform, and build a seamless experience for your users.
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