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Open-source router firmware gives you more control over how VPN runs across your network—from device-level routing to more advanced firewall, segmentation, and customization options. Start with the path that fits how hands-on you want to be.
Control What MattersChoose exactly which devices or traffic routes use VPN.
Go Beyond BasicUnlock stronger routing, firewall, and segmentation options.
Stay FlexibleChange providers, protocols, and setup style over time.
Start the Easy WayUse pre-configured routers if you want simplicity first.
Choose Your Path
Start with the path that fits you
Use this page as the bridge between router shopping and firmware education. Pick the path that matches how much control you want, then go deeper only where it helps.
Most Popular
Pre-configured VPN Router
Best for shoppers who want the fastest route to a secure, working setup without getting buried in firmware decisions first.
Best for routing flexibility, advanced customization, and shoppers who specifically want a firmware-forward setup rather than the easiest plug-and-play path.
This page should help narrow the decision quickly. The deeper comparison lives on the main firmware hub, but these are the three directions most shoppers actually care about.
OpenWrt
Maximum flexibility for custom network builds and users who want the deepest configuration range.
Best forAdvanced customization and routing control
Keep this page decision-focused, not overloaded. These are the questions that matter most before shoppers pick a path.
Do I need open-source firmware to use a VPN router?
No. Many shoppers are better served by a pre-configured VPN router first. Open-source firmware matters most when you want more control over routing, firewall behavior, and advanced customization.
Can I choose which devices use VPN on my router?
Yes. That is one of the main reasons shoppers look at router-level VPN setups and advanced firmware paths in the first place.
Which firmware path is best for Asus users?
AsusWRT-Merlin is often the best place to start if you want more control while staying inside the Asus ecosystem.
What if I already own a router?
Use Flash My Router to see whether your hardware is compatible with a supported upgrade path.
Open-Source Router Firmware for Better VPN Control
Open-source firmware gives you more control over VPN routing, network behavior, and long-term flexibility than most stock routers.
“Router firmware” is the operating system installed on a router that allows you to manage the router settings, enable various features, install VPN, and so much more! Each router firmware is designed with a specific use case, user, and router in mind. Router firmware can range from basic and easy, to complex and advanced.
Can Any Router Firmware Be Used On Any Router Model?
Just like how Android OS is not compatible with Apple products and vice versa, not all router firmware is compatible with every router model.
In some cases, router firmware is designed for a specific piece of hardware in mind, and will only work with that hardware such as the case with the Privacy Hero firmware & router (a custom OpenWRT build). In other cases, the router firmware is designed with a broader variety of models in mind within the same brand, such as Asus Merlin.
Since we understand that each customer is unique, we’re proud to offer a wide variety of router firmware options! When it comes to finding the right firmware for our customers, we take into account a few different factors. Once we have a good understanding of you and your needs, we’re able to narrow down some choices.
1. The VPN Provider
While most router firmware options are compatible with top services such as NordVPN, ExpressVPN, IPVanish, SurfShark, ProtonVPN, CyberGhost, PureVPN & Private Internet Access and more supported VPN providers, there are some exceptions.
If you don’t have a VPN subscription yet, or you think you might want to change VPN providers later on in the future, our team always recommends going with a firmware option that supports all of our supported VPN providers. This leaves you the flexibility to change your VPN provider on the router, without changing the router firmware on the router.
2. Router Use Case
What you plan on using the FlashRouter for plays a large role in the firmware our team will recommend. Whether you’re looking for a FlashRouter that can connect to wi-fi networks on the go or advanced parental controls to keep your little ones safe, we have a firmware option for you!
While there are a number of firmware features that are standard across all of our FlashRouters, such as VPN integration, there are some features that are unique to specific router firmware.
3. Ease Of Use
Most FlashRouters can be pre-configured before we ship them to offer a plug-and-play setup process. In some cases you may need to change your VPN server location or temporarily disable the VPN connection for one or all devices on the router.
A number of router firmware options were created with ease-of-use in mind, which is a great choice to help you learn the ins-and-outs if you are new to VPN, router management, or computers!
With features such as on/off switches for VPN, drop-down menus for various settings options, and easy to view interfaces, beginners and advanced users alike can benefit from an easy-to-use firmware option.
Choosing A Firmware
Now that we know what to consider when we’re choosing a router firmware, we can start comparing our options.
Below, you’ll find all of our firmware options along with some of their key features, VPN provider compatibility, and most popular customer use cases to help you choose a router firmware and narrow down your FlashRouter options.
Privacy Hero
The Privacy Hero Firmware is available exclusively on the Privacy Hero VPN Router and it is a great choice if you’re new to VPN or if you’re looking for a super simple streaming solution!
The Asus Merlin Firmware adds upon your favorite stock firmware features & gives you total control over your VPN setup. Merlin Firmware is a great option for users looking for the most network customization options.
OpenWRT is an open-source firmware project that’s been worked on by countless network professionals around the world with the goal of optimizing home networks and adding on additional security features not found on many stock firmware options.
The ExpressVPN App For Routers is the most user-friendly, plug and play VPN Router option. It is a great choice for beginners or someone looking for a “set it & forget it” type of setup.
