OPNsense — Firewall/router (Open Source)

OPNsense is an open-source Firewall/router solution from Deciso. Compare it against 1 other Firewall/router tool on FreeSoftwareX — by features, licensing and price — and request a quote or demo free in 2026.

What is OPNsense?

OPNsense is open source — its source code is publicly available and free to use, modify and self-host, usually with an active community and no licensing fees. It is categorised under Firewall/router and published by Deciso. Buyers typically evaluate OPNsense when they need a dependable Firewall/router option and want to weigh the trade-offs between free, open-source and paid tools before committing.

OPNsense alternatives

If OPNsense isn't the right fit, compare these Firewall/router alternatives side by side:

pfSense CE

Frequently asked questions

Is OPNsense free?
Yes. OPNsense is open source and free to use, with no purchase cost for the core product.
What are the best OPNsense alternatives?
Popular Firewall/router alternatives to OPNsense include pfSense CE. See the full list of Firewall/router on FreeSoftwareX.
What type of software is OPNsense?
OPNsense is an open-source Firewall/router tool developed by Deciso.

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