10 Best Application Security Monitoring Tools in 2026

Buyer-side comparison. Each tool gets a one-paragraph honest read covering what it's good at, where it falls short, and who it fits.

For the broader framing on what ASM is, see the ASM pillar page.

1. Datadog ASM

Tight integration with Datadog APM. The default if you're already on Datadog — flip a flag, signals appear. Detection-only by default; blocking requires the newer ASM Protect (framework-limited) or a separate WAF. Pricing: $17/host/month on top of APM. Best for: Datadog shops, dedicated SOC teams.

2. SecureNow

OpenTelemetry-native ASM combined with an IP firewall in one npm package. One plan at $99 per app per month with every feature included, after a 14-day free trial (no credit card). Single install, no per-host or per-seat charges. Currently Node-only. Best for: Node-heavy SaaS teams, indie hackers, anyone who wants a unified APM + security tool. See the comparison page.

3. Contrast Security

Best-in-class RASP — bytecode-level instrumentation for Java, deep hooks for Python/Node/.NET. Active blocking, not just detection. Heavy enterprise pricing. Best for: Regulated industries (PCI, HIPAA) where active prevention is mandated.

4. Snyk Application Security

Tight loop between code-side findings (SAST/SCA) and runtime exploitation evidence. Per-developer pricing scales with team size. Best for: Existing Snyk customers wanting runtime visibility.

5. Wazuh

Open-source SIEM-like platform with file integrity monitoring, application logs, and OS-level detection. Self-host or use the cloud version (~$0.70/agent/month). Setup is non-trivial; expect 1–2 engineer-weeks. Best for: Cost-conscious teams with engineering capacity to self-host.

6. AWS GuardDuty + Inspector

AWS-native bundled threat detection. Application-layer detection is shallower than dedicated ASM but integrates tightly with VPC Flow Logs, CloudTrail, AWS WAF. Usage-based pricing (~$50–$500/month for moderate AWS deployments). Best for: AWS-native shops wanting native integration over depth.

7. SecureNow dedicated instance + custom rules

OpenTelemetry observability with the option to build custom security detection on ClickHouse. No out-of-box ASM; you write the rules. Self-host free, cloud at ~$0.50/GB. Best for: OTel-native teams comfortable writing detection logic.

8. New Relic Vulnerability Management

Built into New Relic's per-user pricing model. Decent application-side detection, particularly for SAST-style continuous code analysis paired with runtime evidence. Best for: New Relic shops, multi-language stacks.

9. Falco (cloud-native)

CNCF graduated project. Kubernetes-focused — detects suspicious container behavior, syscalls, anomalous starts. Not application-layer ASM strictly. Free open source. Best for: Kubernetes-heavy infrastructure as one layer in a broader security posture.

10. Sysdig Secure

Commercial fork of Falco with enterprise features (compliance reporting, vulnerability management, runtime threat detection). Container-focused. Custom enterprise pricing. Best for: Large Kubernetes deployments with budget for the enterprise tier.

Quick comparison

Quick-pick decision tree

1. Already on Datadog? → Datadog ASM (zero integration cost).
2. Regulated industry, active prevention required? → Contrast Security or RASP-class tools.
3. Node-heavy SaaS, want consolidated tool? → SecureNow.
4. Self-host, willing to invest engineering time? → Wazuh or SecureNow dedicated instance + custom rules.
5. AWS-native, simple needs? → AWS GuardDuty + Inspector.
6. Kubernetes-heavy? → Falco (free) or Sysdig Secure (enterprise) — as one layer.

For everyone else, start with a free trial of one of the consolidated tools and let your real-world detection needs drive the buying decision.

What we don't recommend

A few products show up in vendor decks but don't deserve consideration:

• Anything labeled "next-gen WAF" that's just a re-skinned ModSecurity rule set — not ASM.
• Tools without OpenTelemetry support in 2026 — you're locking yourself into the vendor's data format.
• Per-seat-only pricing for security tools — incentives are misaligned at scale.

Related

• Application security monitoring guide
• Application Security Monitoring Tools — 2026 Buyer's Guide
• ASM vs RASP