Top RASP Tools for 2026 Ranked and Reviewed

Key Takeaways

• Runtime Application Self-Protection (RASP) has evolved, with many capabilities now integrated into broader observability and edge platforms.
• Contrast Security leads the 2026 rankings for dedicated RASP solutions, with Datadog (incorporating Hdiv’s engine) and Waratek following closely.
• Organizations should assess existing APM tools like Datadog and Dynatrace for unactivated runtime blocking features before considering new RASP procurements.
• Client-side protection, exemplified by Jscrambler, addresses a distinct threat landscape in browsers and should be budgeted separately from server-side RASP.

The concept of Runtime Application Self-Protection (RASP), which defends applications from within their own execution environment, has profoundly influenced the cybersecurity landscape. Its effectiveness in thwarting attacks like memory corruption and command injections at runtime has led to its integration into many observability and edge security platforms. This shift has reshaped the standalone RASP market, often leading to outdated vendor lists that fail to reflect current realities.

Our comprehensive analysis for 2026 identifies nine key players in the RASP space, acknowledging significant market consolidations such as Hdiv’s integration into Datadog in 2022, and noting that K2 Cyber appears to be defunct. Contrast Security secures the top position, with Datadog and Waratek completing the top three.

How We Scored (Methodology)

Our ranking methodology is based on in-depth research, evaluating protection efficacy, performance overhead, deployment flexibility, integration capabilities, and pricing transparency. We did not conduct lab testing, nor did we accept any paid placements. Editorial scores were kept separate from structured data collection.

Key weighting factors included: in-process depth (30%), deployment burden (25%), platform economics (20%), vendor status transparency (15%), and ecosystem integration (10%).

The 2026 RASP Power Rankings

*Editorial research-based scores. n/r = not rated pending status.

1. Contrast Security — Best Dedicated RASP

Snapshot: Per-app/quote | Protect + Assess continuity | Broad language agents

Contrast Security stands out by deeply embedding protection directly within the application. The company, a pioneer in code instrumentation, offers unparalleled exploit blocking with contextual awareness at the code level. Their agents, which function from testing through production, provide seamless Interactive Application Security Testing (IAST) continuity. This approach also strengthens secure coding practices and streamlines remediation efforts across development teams.

Standout features: In-app blocking, comprehensive attack visibility, IAST continuity, extensive language support.

Pros: Exceptional depth of protection, unified agent for multiple functions.

Cons: Agent lifecycle management, per-application economic model.

Bottom line: The definitive choice for dedicated, in-depth RASP.

2. Datadog (incl. Hdiv) — Best APM-Delivered

Snapshot: Published usage | Hdiv engine inside | Zero new agents

Datadog leverages its widespread Application Performance Monitoring (APM) presence to deliver runtime protection as an activatable feature on existing tracing agents. Powered by Hdiv’s technology, acquired in 2022, Datadog provides in-application protection with transparent, usage-based billing. This allows organizations to enable powerful security features without deploying additional agents.

Standout features: Exploit blocking, trace-contextual evidence, APM integration.

Pros: Effortless deployment, clear pricing structure.

Cons: May not match the absolute depth of dedicated RASP solutions.

Bottom line: RASP capabilities readily available via your current APM agent.

3. Waratek — Best JVM Virtual Patching

Snapshot: Quote | Patch without redeploying | Legacy Java’s shield

Waratek specializes in JVM-level rules, enabling the neutralization of vulnerable application behaviors without requiring modifications to the source code. This makes it an indispensable virtual patching solution for critical vulnerabilities, such as those in the Log4j family, particularly for legacy enterprise Java environments unable to accommodate rapid updates.

Standout features: Virtual patching, JVM instrumentation, robust legacy support.

Pros: Ability to patch without redeployment.

Cons: Limited to the JVM ecosystem.

Bottom line: The ideal solution for emergency fixes that bypass traditional release cycles.

4. Dynatrace — Best OneAgent Defense

Snapshot: Published usage | Detect-and-block on OneAgent

Dynatrace seamlessly integrates application security into its existing OneAgent instrumentation. This allows organizations to activate runtime application self-protection (RASP) rules directly within execution flows, halting injection attempts without requiring external appliances. Vulnerabilities are ranked by exposure and prioritized by the Davis AI, simplifying management.

Standout features: OneAgent delivery, runtime blocking, exposure ranking.

Pros: No new agents required, usage-based pricing.

Cons: Strong platform dependency.

Bottom line: A crucial capability to check before embarking on any RASP RFP.

5. Fastly (Signal Sciences) — Best Edge-Adjacent

Snapshot: Tiered/quote | NGWAF at runtime’s job

Fastly, through its Signal Sciences acquisition, delivers a Next-Gen WAF that addresses many security demands traditionally met by RASP. Signal Sciences provides application-aware blocking via flexible deployment options, including web server modules, container sidecars, or edge proxies, without necessitating invasive in-process code instrumentation.

Standout features: Next-Gen WAF capabilities, flexible deployment, application-aware rules.

Pros: Pragmatic approach, strong developer acceptance.

Cons: Lacks true in-process context.

Bottom line: A compelling alternative for teams that prioritize edge-based protection.

6. Imperva — Best WAAP-Estate Pairing

Snapshot: Quote | Thales family | Defense-in-depth

Imperva offers in-app execution depth, designed to complement existing perimeter gateways. Its RASP solution integrates seamlessly within its comprehensive WAAP portfolio, providing an additional layer of defense for backend services against attacks that bypass edge heuristics. This strategy ensures robust, layered protection.

Standout features: RASP module, WAAP integration, virtual patching support.

Pros: Strong synergy with existing Imperva estates.

Cons: Less standalone market momentum.

Bottom line: The optimal choice for organizations already invested in Imperva’s WAAP solutions.

7. Jscrambler — Best Client-Side Lane

Snapshot: Tiered | Browser-side shielding | PCI 6.4.3 tailwind

Jscrambler operates on a distinct security frontier: client-side protection. It provides JavaScript code obfuscation, anti-tampering, and skimming defense specifically against Magecart-style attacks that target untrusted end-user browsers. This solution applies RASP principles directly to critical environments like e-commerce checkout pages.

Standout features: JavaScript protection, anti-tampering, skimming detection, PCI-aligned monitoring.

Pros: Dominates its specialized niche, supported by regulatory requirements.

Cons: Not a server-side RASP solution; requires separate budgeting.

Bottom line: Essential bodyguard for critical client-side operations, especially payment pages.

8. OpenText (Fortify) — Best Suite-Governed

Snapshot: Quote | SSC integration | On-prem capable

OpenText Fortify provides runtime protection under a governance model tailored for Fortify-standardized environments, including those with sovereign data requirements. It offers in-process shielding alongside runtime vulnerability testing for live web applications and Dynamic Application Security Testing (DAST) platforms, ensuring compliance for air-gapped systems.

Standout features: Runtime agents, Fortify SSC integration, robust policy enforcement.

Pros: Strong governance and compliance continuity.

Cons: Less focus on standalone RASP market trends.

Bottom line: In-application defense integrated within a comprehensive compliance framework.

9. Oligo Security — Best ADR / Runtime Exploit Defense

Snapshot: Commercial | Runtime visibility | Exploit detection and blocking

Oligo Security brings advanced Application Detection and Response (ADR) and runtime threat detection to production environments. It leverages runtime behavior analysis and deep application context to identify exploitable risks and active attacks. Supported by threat intelligence from Oligo Security researchers who uncover critical runtime RCE vulnerabilities, it provides strong defensive capabilities.

Standout features: Runtime exploit detection, behavioral context, exploitability prioritization, runtime blocking, comprehensive application visibility.

Pros: Modern approach to runtime security, strong production context.

Cons: More focused on ADR than traditional in-process RASP.

Bottom line: A modern runtime defense strategy built on understanding application execution patterns.

Full Comparison Table

Buying Advice: Toggles First, Depth Where It Counts

Before initiating any RASP Request for Proposal (RFP), organizations should first audit their existing APM solutions. Many Datadog and Dynatrace deployments already possess runtime protection capabilities that may simply need activation. This often represents the most efficient and cost-effective path to enhancing application security.

For scenarios demanding the deepest in-process context, a dedicated solution like Contrast Security is the optimal choice. When dealing with legacy Java environments where rapid redeployment is not feasible, Waratek offers an invaluable virtual patching alternative. For client-side protection, particularly for critical payment pages driven by PCI DSS 6.4.3 requirements, Jscrambler provides essential browser-side shielding. It is also crucial to remove defunct vendors, such as K2 Cyber, and absorbed entities like Hdiv (now integrated into Datadog), from any procurement shortlists to avoid unnecessary complications.

Successful RASP deployment hinges on practical considerations more than feature comparisons. Begin by enabling runtime protection in monitor-only mode on a single, non-critical application. Monitor overhead and false-positive rates with real traffic for a defined period. Only after gathering sufficient evidence should you transition to blocking on specific routes where the data supports it. Attempting a global blocking rollout on day one often leads to immediate reversal.

Furthermore, RASP layers should always complement, not replace, existing Web Application Firewalls (WAFs). Edge WAFs efficiently handle volumetric noise at the perimeter, reserving the more granular, code-level scrutiny of RASP agents for requests that warrant deeper inspection. Finally, client-side protection for payment pages, now a PCI compliance mandate, requires a separate budget and strategic consideration from server-side RASP.

Common Pitfalls

• Enabling global blocking before sufficient evidence from monitor-mode operation.
• Purchasing new RASP solutions while existing APM tools’ integrated protection remains inactive.
• Confusing client-side and server-side protection requirements within a single budget.
• Including defunct or absorbed vendors on procurement shortlists.
• Deploying agents without clear ownership and monitoring of performance overhead by platform engineering teams.

FAQs

What is the best RASP tool in 2026? Contrast Protect is ranked #1 for dedicated in-process protection. Datadog (with Hdiv’s engine) leads for APM-delivered blocking, and Waratek is best for JVM virtual patching. Dynatrace offers strong capabilities via its existing agents, Fastly’s edge solution is notable, and Jscrambler excels in client-side defense.

Is RASP dead as a category? The capability of RASP is thriving, though the standalone market has consolidated. Many RASP functionalities have been integrated into broader platforms, as evidenced by our nine active entries (and one defunct vendor).

What happened to Hdiv and K2? Hdiv was acquired by Datadog in 2022 and now powers its runtime protection features. K2 Cyber appears to be winding down; verification is recommended before any consideration.

How does RASP interact with a Web Application Firewall (WAF)? These technologies operate at different layers. WAF gateways inspect perimeter traffic at the CDN edge, while RASP evaluates execution context directly within the runtime environment. RASP agents can intercept malicious payloads even when vulnerabilities affect edge WAF or CDN architectures, blocking execution from within.

RASP vs WAF – should I use both? Yes, they offer distinct vantage points. WAFs provide broad filtering at the network edge, while RASP offers deep, code-contextual blocking from within the application. A common strategy involves deploying WAFs broadly across all applications and reserving in-process RASP for high-value “crown jewel” applications.

What about client-side protection? Client-side protection, focusing on script integrity and skimming defense (like Jscrambler‘s offerings), is a distinct security requirement. Driven by PCI DSS 6.4.3 for payment pages, it should be budgeted separately from server-side RASP.

What You Should Do

• Audit existing APM tools: Check if your current Datadog or Dynatrace deployments have unactivated RASP capabilities.
• Prioritize based on context: Deploy dedicated RASP for critical applications requiring deep in-process context; consider virtual patching for legacy Java systems.
• Implement in phases: Start RASP in monitor-only mode on a single, non-critical application to assess overhead and false positives before enabling blocking.
• Layer defenses: Always pair in-process RASP with your existing WAAP solutions; they provide complementary, not redundant, protection.
• Budget client-side security separately: Recognize client-side protection as a distinct, often compliance-driven, security initiative.
• Review vendor lists: Keep procurement lists current by removing defunct or integrated vendors.

Disclaimer: HackersRadar reports on cybersecurity threats and incidents for informational and awareness purposes only. We do not engage in hacking activities, data exfiltration, or the hosting or distribution of stolen or leaked information. All content is based on publicly available sources.