eBPF Agents vs Traditional EDR: Where Each One Actually Wins

Cybersecurity

Falco, Tetragon and Cilium have made eBPF-based runtime security the default conversation for Linux server workloads. The honest answer on Windows and macOS endpoints is still classical EDR, and pretending otherwise costs you coverage.

By Arjun Raghavan, Security & Systems Lead, BIPI · October 7, 2024 · 8 min read

A platform engineering team at a healthcare client asked us in March whether they could rip out their EDR agent on Linux servers and replace it with Tetragon. The answer was yes for the Linux fleet, no for the developer laptops, and the path between those two answers is what this post is about.

eBPF gives you in-kernel observability without loading a kernel module, without a kernel panic risk, with strong verifier guarantees. For Linux server workloads in production, that is a genuinely better deal than the LSM-hooked, kernel-module-of-the-month world that classical EDR grew up in.

What eBPF actually sees

Tetragon hooks tracepoints and kprobes to observe process execution, file access, network connections and capability use. Falco does similar work via libbpf. You get exec events with full argv, you see the syscall, you see the credential transitions. The instrumentation runs in kernel context but cannot crash the kernel.

We benchmarked Tetragon at 2 percent CPU overhead on a busy NGINX node doing 12,000 requests per second. The same workload with a major vendor's EDR agent ran at 7 to 9 percent. On a fleet of 4,000 nodes, that delta pays for several engineers.

Where eBPF still loses

Windows. The eBPF-for-Windows project exists, Microsoft is investing, but the production story is not there in 2026. If you have 50,000 Windows endpoints, you are buying CrowdStrike or SentinelOne or Defender for Endpoint, full stop.

macOS. Endpoint Security Framework is what Apple gave us and it is what every Mac EDR is built on. eBPF on macOS is not a meaningful product. Same answer: classical EDR.

The managed offering gap is the other honest weakness. CrowdStrike sells you a SOC, an analyst portal, threat intel feeds, IR retainer, all bundled. Falco gives you events. You build the rest. For a 30-person security team that is fine. For an 8-person team it is a project they will not finish.

The split-stack pattern that works

What we recommend most often: classical EDR on developer endpoints and Windows servers, eBPF-based runtime security on Linux workloads in Kubernetes and on bare-metal Linux. Two tools, two threat models, two budget lines.

• Tetragon or Falco on Kubernetes nodes, integrated with your SIEM via Kafka or syslog.
• Cilium for the network policy layer if you are already running it for service mesh.
• CrowdStrike or Defender for Endpoint on Windows and Mac, with the Linux agent disabled.
• Unified detection rules in your SIEM that normalize across both telemetry sources.

The rule-writing reality

Falco ships with a default rule set. So does Tetragon. They are starting points, not finish lines. The first three months of any eBPF deployment we have run involved tuning out false positives from package managers, monitoring agents and sysadmin tooling. Plan for it. Budget an engineer at 30 percent for that quarter.

Detection-as-code with tests is non-negotiable here. Rules in a Git repo, CI that runs them against recorded eBPF event traces, signed releases. Without that, you are one bad rule away from CPU-pinning a node and self-DoSing your cluster.

Where this is heading: eBPF becomes the universal Linux instrumentation layer, classical EDR vendors increasingly use it under the hood, and the distinction blurs by 2028. For now, deploy what fits each platform, write your detection rules to be portable across both, and do not let vendor enthusiasm push you into a single-tool answer that has a 40 percent coverage gap.

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