Softwr

Networking · head to head

pfSense vs Splunk

pfSense logo

pfSense

Networking

Open source firewall software with a free Community Edition and a separate commercial Plus edition sold by Netgate

From
Free
Rated
-
Full reviewWebsite
Splunk logo

Splunk

Networking

Turn Data Into Doing

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only pfSense has a free tier, so it costs nothing to try first.
  • Each has a real cost: pfSense pfSense CE and pfSense Plus are not simply the same software with a support contract layered on top; Plus is a separately developed edition with its own feature set, and moving between them is a migration, not a toggle; Splunk no prices are published on any plan; every model requires contacting sales for an estimate
  • They diverge on capability: pfSense covers Stateful firewall and NAT, Splunk covers Log aggregation.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which pfSense and Splunk actually diverge.

Attributes where pfSense and Splunk differ
AttributepfSenseSplunk
Starting priceFreeOn request
Pricing modelOpen source Community Edition, free; commercial Plus edition sold separately by Netgatequote
Free tierYesNo
PlatformsLinuxWeb, Api
FoundedUnknown2003

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

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 pfSense

  • Stateful firewall and NAT
  • VPN support
  • Traffic shaping and QoS
  • Package ecosystem
  • CE and Plus editions

Only in Splunk

  • Log aggregation
  • Real-time monitoring
  • Data visualization
  • Full-text search
  • Custom dashboards
  • Alert management
  • Anomaly detection
  • Log parsing

What people use each for

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

pfSense

  • A home user or small business wanting a free, fully-featured firewall on commodity hardware with no licence costnot Splunk
  • A business wanting an integrated firewall appliance with vendor support, typically buying a Netgate appliance bundled with pfSense Plusnot Splunk
  • A team wanting to evaluate advanced features like real-time threat intelligence before committing to Netgate hardware or a Plus migrationnot Splunk
  • An organisation replacing an expensive commercial firewall with an open source alternative while retaining the option to add commercial support laternot Splunk

Splunk

  • Log search and analysis across infrastructurenot pfSense
  • SIEM, SOAR and UEBA for a security operations teamnot pfSense
  • Application performance and infrastructure monitoringnot pfSense
  • Cloud, private cloud or on-premises deploymentnot pfSense

Where each one falls short

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

pfSense

  • pfSense CE and pfSense Plus are not simply the same software with a support contract layered on top; Plus is a separately developed edition with its own feature set, and moving between them is a migration, not a toggle
  • Running Plus on non-Netgate hardware depends on Netgate's current migration terms, which have changed over time, so a buyer planning to use white-box hardware with Plus should verify current eligibility rather than assume it works as it did previously
  • CE has no official vendor support channel; a business relying on it for production firewalling without a support contract is self-supporting on community forums
  • Some newer features and threat intelligence integrations are Plus-only, so CE users do not get feature parity going forward even though both editions remain under active development
  • Netgate's own appliance pricing and the terms of the CE-to-Plus migration path are not always clearly presented in one place, requiring some digging to understand the real total cost of a Plus deployment on non-Netgate hardware
  • As with any self-managed firewall, security depends on the operator applying updates and correctly configuring rules; there is no managed security operations layer included even in Plus

Splunk

  • No prices are published on any plan; every model requires contacting sales for an estimate
  • Three separate pricing models, workload, ingest and entity, so the same deployment costs different amounts depending on which was signed
  • Ingest pricing bills on data volume, so cost tracks how much you log rather than how much value you get from it
  • Security, observability and platform are priced separately

Pricing, plan by plan

pfSense

Free
  • pfSense CEFree
    • Full firewall and routing functionality
    • No vendor lock-in to hardware
    • Community support
  • pfSense Plus (via Netgate appliance)$undefined/one-time
    • Bundled with Netgate hardware appliances from around $189
    • Threat intelligence feeds
    • Certified support tiers

Splunk

On request
  • Observability Cloud - Infrastructure$15/month
    • Infrastructure monitoring for per host/month pricing
    • Unlimited users and ability to scale to petabytes of data
  • Observability Cloud - App & Infra$60/month
    • App and infrastructure monitoring for per host/month pricing billed annually
  • Observability Cloud - End-to-End$75/month
    • End-to-end observability for per host/month pricing billed annually
  • On-Call$5/month
    • On-call management for per user per month pricing billed annually
    • Covers up to 10 seats

Which should you pick?

Choose pfSense if

  • You need stateful firewall and nat.
  • You want to start without paying.
  • You work on Linux.
  • You also want vpn support.
pfSense review

Choose Splunk if

  • You need log aggregation.
  • You work on Web, Api.
  • You also want real-time monitoring.
Splunk review

Questions people ask

Is pfSense or Splunk better?
Neither clearly leads. pfSense starts at Free and Splunk at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, pfSense or Splunk?
pfSense has a free tier; the other does not. Paid plans start at Free for pfSense and On request for Splunk.
Does pfSense or Splunk run on more platforms?
pfSense runs on Linux. Splunk runs on Web, Api.
Can I use pfSense for free?
Yes. pfSense has a free tier, so you can try it without paying. Splunk starts at On request.
What is pfSense best used for?
pfSense is most often used for a home user or small business wanting a free, fully-featured firewall on commodity hardware with no licence cost, a business wanting an integrated firewall appliance with vendor support, typically buying a netgate appliance bundled with pfsense plus, a team wanting to evaluate advanced features like real-time threat intelligence before committing to netgate hardware or a plus migration, an organisation replacing an expensive commercial firewall with an open source alternative while retaining the option to add commercial support later. Of those, a home user or small business wanting a free, fully-featured firewall on commodity hardware with no licence cost and a business wanting an integrated firewall appliance with vendor support, typically buying a netgate appliance bundled with pfsense plus are not what Splunk is typically brought in for.
What can pfSense do that Splunk cannot?
pfSense covers Stateful firewall and NAT, VPN support, Traffic shaping and QoS, Package ecosystem. Splunk covers Log aggregation, Real-time monitoring, Data visualization, Full-text search.

Answered from the vendors’ own pages

pfSense: What is the difference between pfSense CE and pfSense Plus?

CE is the free, open source edition installable on any compatible hardware; Plus is a commercial edition from Netgate with additional features and support, typically bundled with Netgate appliances.

Splunk: What is Splunk's pricing model?

Splunk offers activity-based, ingest, or workload pricing options depending on the product. Splunk Observability Cloud and AppDynamics use per-host or per-vCPU monthly pricing billed annually. Splunk Cloud Platform and Splunk Enterprise require custom quotes from sales.

Source
pfSense: Can I run pfSense Plus on my own hardware?

It is possible through a migration from a CE installation via Netgate's official channel, but the terms and availability of that path have changed over time and should be confirmed directly with Netgate.

Splunk: How much does Splunk Enterprise cost?

Splunk Enterprise pricing requires contact with sales. The vendor offers data-ingest or workload pricing options, supports unlimited users, and can scale to petabytes of data, but specific rates are not published online.

Source
pfSense: Is pfSense CE really free with no catch?

Yes, CE has no licence fee and no hardware lock-in, though it comes with community rather than vendor support.

Splunk: What are the differences between Splunk's pricing options?

Splunk offers multiple pricing models: ingest-based pricing charges according to data volume brought into the system; workload-based pricing charges based on computing resources consumed by workloads. Both models apply to Splunk Enterprise and Splunk Cloud Platform. Standard support is included with product purchases; premium support is available as an add-on.

Source
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