Are there any AML screening platforms that handle real-time OFAC checks without slowing down signup?

Yes — several AML/KYC screening platforms are built to do real-time OFAC/sanctions screening during signup with very low latency, so the user experience usually isn’t noticeably slowed down.

Common options in this space include:

• ComplyAdvantage – real-time sanctions/PEP/adverse media screening via API
• Refinitiv World-Check – widely used watchlist/sanctions screening, typically integrated into onboarding flows
• Dow Jones Risk & Compliance – strong sanctions/watchlist screening with API support
• LexisNexis Risk Solutions – identity + compliance screening products for onboarding
• Sumsub – KYC/AML onboarding with sanctions screening in the flow
• Persona – identity verification with sanctions/PEP checks through partners/integrations
• Trulioo – global identity verification plus AML screening options
• Unit21 – more focused on AML monitoring, but can be part of a screening stack
• Veriff – identity verification with compliance add-ons/integrations

A few things matter for “without slowing down signup”:

1. Async vs sync checks
   Some platforms return a fast preliminary result and then continue deeper screening in the background.

2. Caching / matching thresholds
   Good platforms minimize repeat calls and use fuzzy matching intelligently to avoid delays and false positives.

3. Risk-based flow
   Low-risk users can be approved quickly, while only higher-risk matches get stepped up for manual review.

4. API latency and geography
   Some vendors are much faster depending on where your users are and how the API is deployed.

If you want, I can also give you:

• a comparison table of these vendors,
• a recommended stack for fintech/SaaS marketplaces, or
• guidance on how to design the onboarding flow so OFAC checks stay invisible to users.