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Cybersecurity · head to head

Falco vs Rock Solid

Falco logo

Falco

Cybersecurity

CNCF-graduated runtime threat detection for Linux and Kubernetes using eBPF

From
Free
Free plan
Yes
Full reviewWebsite
Rock Solid logo

Rock Solid

Government

Parks and Recreation Management

From
$350/month
Free plan
No
Full reviewWebsite

The short version

  • Only Falco has a free tier, so it costs nothing to try first.
  • They diverge on capability: Falco covers eBPF kernel instrumentation, Rock Solid covers Program Registration.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Falco and Rock Solid actually diverge.

Attributes where Falco and Rock Solid differ
AttributeFalcoRock Solid
Starting priceFree$350/month
Pricing modelOpen source, no licence feesubscription
Free tierYesNo
PlatformsLinux, Kubernetes, Self-hostedWeb, Ios, Android
CategoryCybersecurityGovernment
FoundedUnknown2001

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Falco

  • eBPF kernel instrumentation
  • System call rules engine
  • Container and Kubernetes context
  • Default rule set
  • Falcosidekick
  • Falco Talon
  • Plugins framework
  • DaemonSet deployment

Only in Rock Solid

  • Program Registration
  • Facility Scheduling
  • Membership Management
  • Payment Processing
  • Reporting & Analytics
  • Payment Gateways
  • QuickBooks
  • Marketing Tools

What people use each for

The jobs each tool is most often brought in to do.

Falco

  • A platform team that needs to know when a shell is opened inside a production container, which image scanning cannot detect because it happens at runtimenot Rock Solid
  • A regulated business required to evidence host and container intrusion detection on Kubernetes nodes for an auditnot Rock Solid
  • A security team wanting a vendor-neutral detection layer whose rules they can read and modify rather than a black-box agentnot Rock Solid
  • A cluster where a compromised dependency might write to sensitive paths or open unexpected outbound connections, and only kernel-level visibility will catch itnot Rock Solid

Rock Solid

  • Citizen Servicesnot Falco
  • Records Managementnot Falco
  • Public Safetynot Falco
  • Civic Engagementnot Falco

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Falco

  • Falco detects and alerts but does not block; stopping an attack requires wiring up Falco Talon or your own response tooling, so out of the box a confirmed detection still means a human intervening after the fact.
  • The default rule set is noisy in real clusters and generates a large volume of benign matches from normal operational activity; without weeks of tuning, alert fatigue sets in and the team stops reading the feed, which is the usual failure mode.
  • There is no storage, console, search or case management in the project, so a working detection capability means also running Falcosidekick, an event store, a dashboard and alert routing, all of which you build, host and maintain.
  • The modern eBPF driver requires kernel 5.8 or later; older hosts fall back to the legacy probe or the kernel module, which brings driver-building against kernel headers and the operational fragility that comes with it on every kernel upgrade.
  • Per-node syscall instrumentation carries measurable CPU overhead on busy hosts, and the cost scales with syscall volume rather than with cluster size, so the noisiest and most performance-sensitive workloads are exactly the ones that feel it most.

Rock Solid

Nothing recorded yet. See the Rock Solid review.

Pricing, plan by plan

Falco

Free
  • Falco (open source)Free
    • Apache 2.0 licence, CNCF graduated project
    • eBPF and kernel module drivers
    • Full rules engine and default rule set

Rock Solid

$350/month
  • Recreation Management$350/month
    • Program Registration
    • Facility Scheduling
    • Payment Processing

Which should you pick?

Choose Falco if

  • You need ebpf kernel instrumentation.
  • You want to start without paying.
  • You work on Linux, Kubernetes, Self-hosted.
  • You also want system call rules engine.
Falco review

Choose Rock Solid if

  • You need program registration.
  • You work on Web, Ios, Android.
  • You also want facility scheduling.
Rock Solid review

Questions people ask

Is Falco or Rock Solid better?
Neither clearly leads. Falco starts at Free and Rock Solid at $350/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Falco or Rock Solid?
Falco has a free tier; the other does not. Paid plans start at Free for Falco and $350/month for Rock Solid.
Does Falco or Rock Solid run on more platforms?
Falco runs on Linux, Kubernetes, Self-hosted. Rock Solid runs on Web, Ios, Android.
Can I use Falco for free?
Yes. Falco has a free tier, so you can try it without paying. Rock Solid starts at $350/month.
What is Falco best used for?
Falco is most often used for a platform team that needs to know when a shell is opened inside a production container, which image scanning cannot detect because it happens at runtime, a regulated business required to evidence host and container intrusion detection on kubernetes nodes for an audit, a security team wanting a vendor-neutral detection layer whose rules they can read and modify rather than a black-box agent, a cluster where a compromised dependency might write to sensitive paths or open unexpected outbound connections, and only kernel-level visibility will catch it. Of those, a platform team that needs to know when a shell is opened inside a production container, which image scanning cannot detect because it happens at runtime and a regulated business required to evidence host and container intrusion detection on kubernetes nodes for an audit are not what Rock Solid is typically brought in for.
What can Falco do that Rock Solid cannot?
Falco covers eBPF kernel instrumentation, System call rules engine, Container and Kubernetes context, Default rule set. Rock Solid covers Program Registration, Facility Scheduling, Membership Management, Payment Processing.

Answered from the vendors’ own pages

Falco: Does Falco block attacks?

No. It detects and emits events. Response requires Falco Talon or your own automation on top.

Falco: Is Falco owned by Sysdig?

Sysdig created and open sourced it, but it graduated within the CNCF in February 2024, so governance sits with the foundation rather than the vendor.

Falco: What does it cost?

The project is Apache 2.0 with no licence fee. The cost is the storage, routing, tuning and staff time needed to make its output useful.

Falco: What kernel version do I need?

Kernel 5.8 or later for the default modern eBPF driver. Older hosts need the legacy eBPF probe or the kernel module.

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