Should you build or buy Application Shielding & Runtime Self-Protection (RASP)?
Application shielding and runtime self-protection (RASP) software hardens a mobile or web app's compiled code against reverse engineering, tampering, and hooking, and monitors the app for attacks while it runs. Banks, payment processors, and any app handling sensitive credentials or transactions buy it to meet fraud and compliance requirements.
A competent team can and should run the platform-backed pieces itself: Play Integrity and App Attest verified server-side, R8 shrinking, sensible root and debugger checks bound to sensitive actions. It cannot cheaply reproduce maintained obfuscation, anti-hooking and anti-tamper with current threat research, nor the evaluated-component evidence a payment program expects, and no independent team is documented doing so. Buy the shield for the high-value apps, keep the attestation layer yours, and treat the $20k-per-app tier as the negotiating anchor.
Build it, buy it, or bridge?
When building makes sense
A competent security team can and should own the attestation layer itself: verifying Play Integrity and App Attest server-side, applying R8 or ProGuard shrinking, and wiring root or debugger checks to sensitive actions rather than routing them through a vendor SDK. That work is genuinely buildable with current tooling and belongs in-house regardless of what else you buy. What's harder to reproduce is the layer above it: maintained obfuscation that keeps up with new reverse-engineering techniques, anti-hooking protection against tools like Frida, and anti-tamper research funded by a team that does nothing else all day. WhatsApp's own custom device-verification system, rolled out to one hundred percent of Android users to catch malware stealing an authentication key, shows what a frontier engineering team with Meta's resources can build. No independently documented case shows a mainstream team reproducing that same depth of protection without buying it.
When buying makes sense
Buying the shielding layer is the clear call for any app processing payments or handling credentials that a bank, card network, or regulator will eventually ask about. What Contrast, Digital.ai, Guardsquare, and Promon actually sell is maintained protection tooling that tracks new attack techniques, threat telemetry drawn from hundreds of millions of devices, and, for payment apps, an EMVCo Software-Based Mobile Payment certification a lab evaluated. Promon holds that EMVCo SBMP certification following a formal evaluation by Riscure's security lab, which is the kind of third-party evidence a payment program actually checks for. Negotiate hard on per-app pricing: Digital.ai's Essential App Protection tier lists at $20,000 a year per app on AWS Marketplace, a useful anchor even if Guardsquare and Promon negotiate by quote. Keep Play Integrity and App Attest running server-side yourself regardless of which vendor you sign.
The desk read
Build-versus-buy analysis for Application Shielding & Runtime Self-Protection (RASP) is being written. In the meantime, the framework that drives every B4 call is on the B4 Index page.
Frequently asked
Is application shielding the same product as RASP, or two separate things?
They're usually one purchase. Vendors like Guardsquare and Promon bundle static shielding, the hardened build, with runtime self-protection, the live monitoring, under a single SDK, so buyers rarely choose between them separately. The distinction matters mainly for understanding what a security audit is actually testing.
Can I use free tools like ProGuard instead of paying for a shield?
For basic code shrinking and obfuscation, yes. What free tools don't cover is maintained anti-hooking protection, anti-tamper research against new attack techniques, and threat telemetry from a large device base, which is what the paid tier is actually buying.
Do I still need Play Integrity or App Attest if I buy a shield?
Yes. Play Integrity and App Attest verify device and app integrity at the platform level, and a competent team should run them server-side regardless of what else it buys. A commercial shield adds anti-tamper and anti-hooking protection on top of that baseline.
Does my payment app need EMVCo certification?
If you process card payments through a software-based wallet or Tap-to-Phone flow, most card networks expect EMVCo Software-Based Mobile Payment evaluation, and using an already-certified shielding component like Promon's can speed that process considerably.