Networking · head to head
OpenVPN vs Splunk
OpenVPN
Networking
Open source VPN protocol with a commercial Access Server product priced per simultaneous connection
- From
- Free
- Rated
- -
The short version
- Only OpenVPN has a free tier, so it costs nothing to try first.
- Each has a real cost: OpenVPN open source OpenVPN, while free, requires real technical skill to configure, secure and maintain without the Access Server admin layer; Splunk no prices are published on any plan; every model requires contacting sales for an estimate
- They diverge on capability: OpenVPN covers Open source core, Splunk covers Log aggregation.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which OpenVPN and Splunk actually diverge.
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 OpenVPN
- Open source core
- Access Server admin UI
- Per-connection licensing
- Free tier
- Cross-platform clients
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.
OpenVPN
- A technical team wanting a fully free, self-configured VPN server using the open source protocol without any vendor relationshipnot Splunk
- A small business wanting a supported, easier-to-administer VPN server, willing to pay per concurrent connection rather than per employeenot Splunk
- An organisation with more staff than typical concurrent VPN usage, since Access Server bills only active simultaneous connections, not total accountsnot Splunk
- An IoT or large-scale deployment needing custom Enterprise pricing above 2,000 connectionsnot Splunk
Splunk
- Log search and analysis across infrastructurenot OpenVPN
- SIEM, SOAR and UEBA for a security operations teamnot OpenVPN
- Application performance and infrastructure monitoringnot OpenVPN
- Cloud, private cloud or on-premises deploymentnot OpenVPN
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
OpenVPN
- Open source OpenVPN, while free, requires real technical skill to configure, secure and maintain without the Access Server admin layer
- Per-connection billing on Access Server means usage spikes, such as an all-hands remote day, can push simultaneous connections over a licensed limit and block new connections until usage drops or the plan is upgraded
- OpenVPN's traditional hub-and-spoke architecture routes traffic through a central server, unlike mesh VPN tools like Tailscale or NetBird that establish direct peer-to-peer connections where possible, which can add latency
- Client configuration and certificate management for the open source version is more manual and error-prone than newer VPN tools with zero-config onboarding
- Access Server pricing above the Growth tier reverts to custom Enterprise quoting, so very large deployments lose the pricing transparency of the lower tiers
- The protocol's throughput is generally lower than newer kernel-integrated protocols like WireGuard under equivalent conditions, which matters for high-bandwidth use cases
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
OpenVPN
Free- Access Server FreeFree
- Up to 2 simultaneous connections
- All features included
- Access Server Growth$7/month
- Per simultaneous connection beyond the free tier
- Annual billing
- Access Server Enterprise/IoT$undefined/month
- Custom pricing for 2,000+ connections
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 OpenVPN if
- You need open source core.
- You want to start without paying.
- You work on Linux, Windows, macOS, iOS, Android.
- You also want access server admin ui.
Choose Splunk if
- You need log aggregation.
- You work on Web, Api.
- You also want real-time monitoring.
Questions people ask
- Is OpenVPN or Splunk better?
- Neither clearly leads. OpenVPN 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, OpenVPN or Splunk?
- OpenVPN has a free tier; the other does not. Paid plans start at Free for OpenVPN and On request for Splunk.
- Does OpenVPN or Splunk run on more platforms?
- OpenVPN runs on Linux, Windows, macOS, iOS, Android. Splunk runs on Web, Api.
- Can I use OpenVPN for free?
- Yes. OpenVPN has a free tier, so you can try it without paying. Splunk starts at On request.
- What is OpenVPN best used for?
- OpenVPN is most often used for a technical team wanting a fully free, self-configured vpn server using the open source protocol without any vendor relationship, a small business wanting a supported, easier-to-administer vpn server, willing to pay per concurrent connection rather than per employee, an organisation with more staff than typical concurrent vpn usage, since access server bills only active simultaneous connections, not total accounts, an iot or large-scale deployment needing custom enterprise pricing above 2,000 connections. Of those, a technical team wanting a fully free, self-configured vpn server using the open source protocol without any vendor relationship and a small business wanting a supported, easier-to-administer vpn server, willing to pay per concurrent connection rather than per employee are not what Splunk is typically brought in for.
- What can OpenVPN do that Splunk cannot?
- OpenVPN covers Open source core, Access Server admin UI, Per-connection licensing, Free tier. Splunk covers Log aggregation, Real-time monitoring, Data visualization, Full-text search.
Answered from the vendors’ own pages
OpenVPN: Is OpenVPN free?
The open source protocol and software are free under the GPL; Access Server, the commercial packaged product, charges per simultaneous connection beyond a free 2-connection tier.
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.
SourceOpenVPN: What counts as a connection for billing purposes?
A simultaneously active connected device, not a registered user account or total device count; unlimited accounts and devices can be created but only the licensed number can be connected at once.
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.
SourceOpenVPN: How does OpenVPN compare with WireGuard-based tools like Tailscale?
OpenVPN uses a traditional hub-and-spoke VPN architecture rather than the mesh, peer-to-peer approach used by newer tools like Tailscale or NetBird.
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.
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