The rise of neobanks and digital wallets had already altered the way millions of people manage money. From sending funds in seconds to paying bills with a tap, these all-digital services have simplified banking.
Yet that convenience carries serious risks.
Cybercriminals love targeting fintech apps. Why? Because they house something very valuable — money and personal data. Even a single security breach can cost a neobank millions of dollars, and users’ trust in the brand can be irreversibly damaged overnight.
That’s where security audits are supposed to come in.
A security audit is essentially a deep check-up for your app or platform. It scans for weaknesses before hackers can find them. For neobanks and digital wallets, such audits are not optional — but a survival tool.
In the following, we’ll go over 9 critical tools that security teams, fintechs and developers use to conduct deep neobank & digital wallet security audits. If you are working to create the next great fintech company, or leading a digital bank already in operation, this guide is meant for you.
Why This Is Such a Big Deal
Neobanks operate entirely online. There is no bank branch to walk into. Meaning all transactions, logins and data migration is done through digital means. If those channels aren’t safe, nothing is secured.
These wallets, such as Apple Pay or Google Pay, or lesser-known fintech wallets, hold sensitive payment credentials. A single weakness in the system can leave tens of thousands — if not millions — of users exposed.
Here’s a fast look at what is on the line:
| Risk Type | Potential Impact |
|---|---|
| Data breach | Loss of user data, legal penalties |
| Account takeover | Financial losses, loss of customer trust |
| API vulnerabilities | Unauthorized access to backend systems |
| Weak encryption | Plaintext leakage of transaction information |
| Compliance failures | Regulatory fines, revocation of license |
Frequent security audits can catch these things early. The platforms below help you do that faster, more intelligently, and more comprehensively.
1. Burp Suite — The Swiss Army Knife for Web Application Testing
What Makes It a Fintech Favorite
Burp Suite, developed by PortSwigger, is one of the most widely used web application security testing tools. It’s been around for years and years, and security professionals place enormous faith in it.
For neobanks and digital wallets, Burp Suite is great for finding issues in web and API interfaces. Because most neobanks are highly dependent on APIs to link their frontend apps with backend banking systems, this is vital.
Burp Suite functions by acting as a man-in-the-middle, so you can use it to intercept traffic between your browser and the target application. It intercepts requests, exposes them to testers, and then helps identify vulnerabilities like SQL injection, cross-site scripting (XSS), or broken authentication.
Useful Features for Auditing Digital Wallets
- Automated scanning for common vulnerabilities
- Deep-dive analysis with manual testing tools
- API-level security testing built into the platform
- Detailed reporting for compliance documentation
The Professional and Enterprise versions include more advanced scanning capabilities for larger fintech businesses. The community edition is free and ideal for smaller teams who are beginning their audit journey.
2. OWASP ZAP — The Free, Open-Source Security Tool Powerhouse
Built for Developers, Loved by Auditors
OWASP ZAP (Zed Attack Proxy) is a free, open-source penetration testing tool maintained under the umbrella of the Open Web Application Security Project. It’s one of the most highly recommended platforms for teams who do not want to spend a fortune on enterprise-grade security testing.
For lean neobank teams, ZAP is a real gift. It checks for security vulnerabilities in web apps and APIs and generates clear, actionable reports.
How It Benefits Neobank Security Teams
ZAP is very helpful during development. Developers can include it in their CI/CD pipelines, so security checks get done automatically every time code is pushed. This is known as “shift-left security” — catching problems earlier in the development process.
Key capabilities include:
- Active and passive scanning modes
- General-purpose spider to cover all parts of a web application
- A fuzzer for testing application behavior with unexpected inputs
- Jenkins, GitHub Actions and other DevOps tool integrations
If your neobank team does DevSecOps, ZAP should be sitting at the top of your toolkit.
3. Veracode — Static and Dynamic Analysis at Scale
Going Deeper Into the Codebase
Veracode is a cloud-based platform for application security testing. It’s not just mere surface-level scanning — it digs deep into your application’s actual source code.
That is incredibly valuable for neobanks building custom apps. Veracode does both Static Application Security Testing (SAST), which tests code without running it, and Dynamic Application Security Testing (DAST), which tests the application as it is running in real time.
What Sets Veracode Apart
The platform also has Software Composition Analysis (SCA) to monitor all the third-party libraries and open-source components your app leverages. A lot of neobanks are built on top of other people’s code packages, and those packages can contain hidden vulnerabilities.
| Testing Type | What It Tests |
|---|---|
| SAST | Source code pre-deployment |
| DAST | Application behavior in live environment |
| SCA | Third-party libraries and dependencies |
| Penetration Testing | Real-world attack simulation |
Veracode also helps with compliance. It maps findings to standards such as PCI-DSS, GDPR and SOC 2 — all of which are very important to companies in the financial services space. For more insights into how neobanks handle compliance and financial security, BankProfi is a great resource to explore.
4. Qualys — Cloud-Based Vulnerability Management
Keeping the Entire Infrastructure Secure
Qualys has a more expansive notion of security. Unlike merely application monitoring, it watches everything: servers, cloud environments, containers and endpoints.
For neobanks that are hosted on cloud services like AWS, Google Cloud or Azure, Qualys is a very good fit. It automatically finds vulnerabilities throughout your whole setup and grades them by level of risk.
Real-Time Monitoring for Financial Platforms
One of the main things that separates Qualys from the competition is its continuous real-time monitoring. Instead of running audits once a quarter, Qualys is watching 24/7. For a neobank that’s transacting around the clock, this sort of always-on protection is crucial.
It also has a strong compliance module for ensuring that your infrastructure meets regulatory requirements. This is a big deal for digital wallet companies that work across many countries with varying financial rules.
Key Qualys strengths:
- Instant visibility with cloud agent-based scanning
- Container security for modern microservices-based applications
- Web Application Firewall (WAF) integration
- Compliance monitoring over PCI-DSS, ISO 27001, and more
5. Checkmarx — Code Security That Starts From the Very Beginning
A Sense of Security From Day One
Checkmarx is a solution developed to enable development teams to write secure code. It plugs directly into the tools that developers already use — such as Visual Studio Code, IntelliJ and GitHub — so security feedback is immediate while code is being written.
This can be a game changer for any neobank’s engineering team. Developers don’t need to wait for a separate security review. When they write code that could open a vulnerability, they receive instant alerts.
A Perfect Fit for Agile Fintech Development
The vast majority of newer neobanks operate in fast-paced agile environments. Checkmarx is designed for this. It keeps up with rapid development cycles without getting in the way of teams.
The platform covers:
- Proprietary code scanning (SAST)
- Open-source security (SCA)
- Infrastructure-as-code security — checking cloud configuration files
- API security testing
Checkmarx also offers a risk-based view of findings, so teams can focus on what is most important to fix rather than getting lost in a sea of low-priority alerts.
6. Synack — Crowdsourced Penetration Testing
The Force of a Global Security Community
Synack does something radically different. Rather than relying on automated tools, it empowers fintech firms with a curated network of white-hat hackers from across the globe.
These security researchers — called the Synack Red Team — actually try to hack into your systems, just like a real attacker would. Except they’re doing it with your permission, and everything they uncover is reported back to you so that you can fix it.
Why Pen Testing Is Non-Negotiable for Digital Wallets
Automated scanners are indeed formidable, but they have their limitations. They can overlook complex, logic-based bugs that require human ingenuity to find. There are things a good pen tester does that no automated tool ever would.
This is very important for digital wallet security audits. Payment flows, authentication mechanisms and session management are all rife with complex logic that is best tested by human hands.
Synack combines human intelligence with its AI-guided platform — LaunchPoint — to coordinate testing, manage findings and track remediation over time.
Benefits of using Synack:
- A pool of 1,500+ verified global security researchers
- Continuous testing, not one-time snapshots
- Intelligent tasking to direct testers toward highest-risk areas
- Structured reporting with clear remediation steps
7. HackerOne — Bug Bounty Programs for Ongoing Security
Turning the Security Community Into Your Ally
HackerOne is the number one hacker-powered security platform, helping organizations find and fix critical vulnerabilities before they can be criminally exploited. It is used by companies including Google, Microsoft and thousands of fintech firms to invite ethical hackers to identify and report security issues in return for rewards.
For neobanks and digital wallet companies, running a bug bounty program through HackerOne ensures an additional level of continuous security testing. It is not a substitute for formal audits, but it makes an amazing complement to them.
How Bug Bounties Work at Neobanks
Your company decides what’s in scope — which apps, APIs and systems the researchers can test. You set the reward levels based on the severity of bugs reported. Researchers submit findings through HackerOne’s secure platform. Your team then reviews and corrects the problems.
It’s an ongoing, relatively inexpensive way to stay sharp on security in between formal audit cycles.
HackerOne also provides managed bug bounty programs, which handle triage and coordination — perfect for smaller neobank teams without dedicated security personnel.
8. IBM Security AppScan — Enterprise-Grade Application Testing
Trusted by the Biggest Names in Finance
IBM Security AppScan (now part of HCL AppScan following an acquisition) has a long history in the financial services sector. It is designed for large and complex businesses with both cloud-based and on-premise deployment options.
For high-growth neobanks, or those partnered with traditional banking players, AppScan delivers the enterprise-grade security testing that aligns with the strictest regulatory requirements.
Deep Compliance Capabilities
Compliance reporting is another area where AppScan truly excels. It has the ability to produce comprehensive reports directly mapped to PCI-DSS, OWASP Top 10, GDPR and other leading standards. For fintech companies that must present audit results to regulators or banking partners, this is a huge time-saver.
AppScan capabilities at a glance:
| Feature | Description |
|---|---|
| SAST | Source code scans for vulnerabilities |
| DAST | Live application testing |
| IAST | Combined dynamic and static analysis |
| Mobile support | iOS and Android fintech apps |
| Compliance reports | Auto-generated for major standards |
The mobile testing capability is especially relevant for digital wallets, most of which are accessed through a mobile app interface.
9. Nessus by Tenable — The Industry’s Gold Standard Vulnerability Scanner
Scanning Everything From Servers to Containers
Nessus has long been a venerable tool in the security industry. Maintained by Tenable, it is one of the most reliable and robust vulnerability scanners in the world. It spans a hugely diverse array of assets: servers, cloud workloads, containers, network devices and more.
For neobanks with more complicated infrastructure, Nessus offers the type of wide coverage you need to avoid missing anything.
Why Nessus Works for Fintech Environments
Nessus is great for finding misconfigured systems, systems missing patches and insecure network services — all of which are common entry points for attackers. It’s also fast. Large scans that could take hours with different tools can finish considerably quicker using Nessus.
The tool also delivers ready-to-use templates for various compliance standards, enabling you to launch audits tailored for financial services organizations. According to OWASP’s official security guidelines, combining multiple scanning approaches significantly reduces risk exposure for financial platforms.
Nessus strengths for neobank audits:
- More than 170,000 plugins covering nearly every vulnerability ever reported
- Rapid, reliable scans with minimal risk of false positives
- Policy compliance auditing
- Fully customizable reports suitable for security teams and regulators
Which Platform Should Your Neobank Use?
Not all platforms on this list will be the best fit for every organization. Here’s a guide to help you decide:
| If You Are Looking For… | Consider… |
|---|---|
| Web and API security testing | Burp Suite or OWASP ZAP |
| Code-level security at development | Checkmarx or Veracode |
| Infrastructure and cloud security | Qualys or Nessus |
| Human-led penetration testing | Synack |
| Ongoing community-driven testing | HackerOne |
| Enterprise compliance reporting | IBM AppScan |
Fully grown neobanks will generally not bet the farm on a single platform. A multilayered approach provides the most comprehensive security coverage.
Building a Security Audit Routine That Actually Works
Choosing the best tools is just taking care of half the equation. You also need a routine that turns security into a habit, not something you do once.
Here’s a rough framework many fintech security teams follow:
Weekly: Automated vulnerability scans using a tool like Nessus or Qualys. Monitor for alerts and patch critical vulnerabilities as soon as possible.
Monthly: Application security testing using Burp Suite or OWASP ZAP. Review API endpoints for new vulnerabilities introduced by recent code changes.
Quarterly: Full penetration testing using Synack or an equivalent platform. Assess compliance position and revise documentation.
Ongoing: Bug bounty program through HackerOne. Code-level security scanning with Checkmarx integrated into every development sprint.
It is this kind of layered, regular approach that sets apart fintech companies that stay secure from those that end up making headlines for all the wrong reasons.
Neobank & Digital Wallet Security Audits: Your Questions Answered
Q: How frequently should a neobank conduct a security audit? At least one formal security audit should occur annually. But the top fintech companies conduct continuous automated scans and quarterly penetration tests to keep ahead of threats.
Q: Should we use free software such as OWASP ZAP in a neobank? Free tools like ZAP are great for testing in the development phase and for smaller teams. But as your neobank grows, you’ll probably want paid platforms with more sophisticated features, stronger support and compliance reporting capabilities.
Q: What’s the difference between a vulnerability scan and a pen test? A vulnerability scan is automated — it locates known security holes in your system. A penetration test is more comprehensive and includes human testers actively trying to exploit those weaknesses to determine how far they can go. Both are essential elements of a comprehensive security audit strategy.
Q: Do digital wallet apps need mobile-specific security testing? Absolutely. Mobile apps are exposed to a spectrum of issues that differ from those typical on web applications — for example, insecure storage of data on devices, weak local authentication and exposed APIs. Both IBM AppScan and Burp Suite support mobile testing as well.
Q: What compliance standards should a neobank pay attention to? The most significant ones are PCI-DSS (for payment card data), GDPR (privacy of European users’ data), SOC 2 (service organization controls) and ISO 27001 (information security management). Choosing the correct security audit platform will allow you to monitor compliance across all of these.
Q: Are these security platforms in reach for small fintech startups? A lot of them have tiered pricing or free alternatives. OWASP ZAP is completely free. HackerOne and Synack both have flexible pricing. Using open-source tools and graduating to other options as your business scales is entirely legitimate.
Q: What is the distinction between a bug bounty program and a security audit? A bug bounty program is live and community-run — researchers find and report bugs when they come across them. A security audit is formalized, time-determined and exhaustive. Both have an important — though different — role to play.
Wrapping It All Up
Security is not one of those things that you set and forget — especially in the high-stakes realm of neobanking and digital wallets.
The 9 platforms listed here are all unique in their own way. Burp Suite and OWASP ZAP are great for web and API testing. Both Veracode and Checkmarx really get into the code. For your infrastructure, Qualys and Nessus are the go-to options. Synack and HackerOne unlock the potential of human creativity in your security program. And IBM AppScan brings it all together with enterprise-level compliance reporting.
The top neobanks do not wait for a breach to get serious about security. They bake security into every level of their operation — from the initial line of code to the live production environment.
Begin with the tools that fit your current size and budget. Add more layers as you grow. And integrate security audits into your culture, not just as something to check off the list once a year.
Your users trust you with their money. That trust is worth protecting.
