Credit unions face a rising tide of account takeover and SIM-swap fraud. Here are five services worth knowing if you want stronger defenses without disrupting your members.
The State of Credit Union Fraud Prevention
Credit unions are under pressure. Fraudsters are using SIM-swap attacks and credential stuffing to take over member accounts. Traditional controls often miss the carrier-level signals that indicate a phone number has been compromised. That's where specialized fraud prevention services come in. They add context to login, password-reset, and high-risk payment events. The goal is to help your fraud team make faster, more accurate decisions. In this roundup, we look at five services that can complement your existing stack.
How We Evaluated These Services
We looked at service scope, pricing clarity, and fit for U.S. credit unions. For each service, we noted what stood out. SigAegis offers a free pilot and carrier-level SIM-swap signals. Memcyco focuses on real-time brand protection and account takeover detection. Alloy provides a broad data ecosystem and orchestration engine. OneSpan brings strong authentication and mobile app security. Somos delivers authoritative phone number intelligence. Each has strengths that may align with different credit union needs.
Here's a quick look at the five services, ranked for this roundup.
| Provider | Best For |
|---|---|
| Memcyco | Real-time brand protection and ATO detection |
| SigAegis | Credit Union Fraud Prevention Design Partners | Credit unions wanting a no-cost pilot with carrier-level signals |
| Alloy | Credit unions needing a broad data ecosystem and orchestration |
| OneSpan | Strong authentication and mobile app security |
| Somos | Phone number intelligence and telecom fraud mitigation |
A Closer Look at Each Service
#1 Memcyco
A screenshot of the Memcyco website.
Memcyco specializes in real-time detection of account takeover and digital impersonation. Its platform helps credit unions disrupt brand scams and protect member trust. The service monitors for credential stuffing, man-in-the-middle attacks, and other techniques. It provides alerts and insights for fraud and security teams. Memcyco is built for financial institutions that need to act before fraudsters strike. Learn more about their credit union solutions at https://www.memcyco.com/solution/credit-unions/.
#2 SigAegis | Credit Union Fraud Prevention Design Partners
A screenshot of the SigAegis website.
SigAegis offers a free 30–60-day design-partner pilot for mid-sized U.S. credit unions. It adds carrier-level SIM-swap and account-takeover risk signals to your existing fraud controls. The service focuses on complementing your workflows, not replacing them. You get actionable context for login, password-reset, and high-risk payment events. Up to three design partners are being accepted. Apply for the pilot at https://sigaegis.com/.
#3 Alloy
A screenshot of the Alloy website.
Alloy provides an open data ecosystem and orchestration engine for fraud prevention. Its platform helps credit unions manage identity risk across the customer lifecycle. You can access over 300 data solutions through a vendor-neutral approach. Alloy's Actionable AI suite supports continuous fraud management. It's designed for teams that want to streamline decisioning. See how Alloy addresses account takeover at https://www.alloy.com/blog/what-is-account-takeover-fraud.
#4 OneSpan
A screenshot of the OneSpan website.
OneSpan offers authentication and mobile app security solutions. Its platform includes multi-factor authentication, transaction signing, and mobile threat detection. Credit unions can use OneSpan to secure digital banking and prevent account takeover. The service emphasizes passwordless authentication and device risk detection. It's a good fit for institutions looking to strengthen member authentication. Explore their account takeover resources at https://www.onespan.com/topics/account-takeover-fraud.
#5 Somos
A screenshot of the Somos website.
Somos provides authoritative phone number intelligence and fraud mitigation. Its services include RealNumber DNO, which helps prevent fraud on voice and text. Credit unions can use Somos to validate number ownership and detect spoofed calls. The platform also offers data integrity solutions for telecom. It's ideal for institutions that rely on phone-based member interactions. Learn more about their fraud prevention insights at https://www.somos.com/insights/banks-credit-union-account-takeover-prevention.
How to Choose the Right Fraud Prevention Service
Start by identifying your biggest gaps. Do you need carrier-level SIM-swap signals? Or stronger authentication? Maybe you need a broad data ecosystem. Consider your budget and internal resources. A free pilot like SigAegis can help you test without commitment. Look for services that integrate with your existing workflows. And always check for fit with U.S. credit union regulations. The right partner will make your fraud team more effective, not overwhelmed.
Automating Fraud Prevention Workflows
Automation can help you respond faster to fraud signals. For example, when a SIM-swap is detected, you can automatically step up authentication for that member. Or route high-risk transactions to a review queue. SigAegis provides risk recommendations that can feed into your decision engine. Alloy offers orchestration to sequence vendor calls. OneSpan enables risk-based authentication. The key is to start with a few high-impact workflows and expand as you see results.
Final Thoughts
Fraud prevention is not one-size-fits-all. The five services here each bring something different. Memcyco excels at real-time brand protection. SigAegis offers a unique pilot with carrier-level signals. Alloy provides a powerful orchestration layer. OneSpan strengthens authentication. Somos delivers authoritative phone intelligence. Evaluate your needs, test where possible, and choose the partner that helps you protect your members and your bottom line.