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WireGuard and OpenVPN are two extremely popular virtual private network (VPN) protocols that use different encryption to keep your data safe. Each protocol has different functions or is better suited for different situations. Regarding security vulnerabilities, attack surfaces, and encryption algorithms, the distinctions in WireGuard and OpenVPN’s codebase may or may not work for what you’re trying to do.
If you’re scratching your head wondering which one is best for you, then you can review our comparison of WireGuard vs. OpenVPN to see the best scenarios for each. We’ll also share the best VPNs that offer these protocols.
You may have seen reviews or even just general information about VPNs and noticed the protocols that were mentioned. You may even switch the protocols on your VPN from time to time without knowing what they mean.
A VPN protocol is a set of rules that dictates how your information is funneled through your VPN. VPN services use these rules to encrypt your data and protect it while you use their service. Different protocols have different rules.
WireGuard is a VPN protocol. WireGuard was originally built for Linux but has expanded to include all major operating systems, including Windows, macOS, iOS, Android, and BSD. It claims its goal is to offer better performance than OpenVPN and IPsec, which it states are “behemoths” with lengthy lines of code that take ages to audit.[1]
According to ExpressVPN, which does not currently support WireGuard, WireGuard is a lighter (less code) and faster VPN connection that’s becoming more widely adopted across VPN platforms. Because of WireGuard’s lighter approach, it can exchange packets faster. Since a packet is the information exchanged between locations (when you type in a website and then your internet browser takes you there), having a lightweight process like WireGuard can get you there faster and with more security.
The only real issue with WireGuard is that it doesn’t obfuscate naturally, meaning that it’s apparent you’re using a VPN, and it doesn’t offer a dynamic IP address. This is why it’s best to use WireGuard with a VPN service like Surfshark, which does these things naturally.
If you like the idea of using the fast, lightweight WireGuard with your VPN, you should check out these providers. They both offer dynamic IP addresses and obfuscated VPN servers to make sure you’re getting the best protection possible.
Where WireGuard prides itself on its lightweight code and speedy data exchanges, OpenVPN is lauded for its heavy security. OpenVPN supports a Community Edition with open-source code, which means the core code that is responsible for its encryption is available for anyone to review and support.
Open-source software tends to be more secure and functional because the community can easily catch any discrepancy or weakness.
Because of the Secure Socket Layer (SSL) encryption OpenVPN uses, it can bypass most firewalls. It even offers a cloud solution for businesses to ensure security and reduce the chance of being attacked by hackers. It’s able to do all this because it’s been tried and tested across the internet in various situations and on many different platforms.
The built-in end-to-end encryption, as well as a kill switch, are on par with some of the best VPN providers that use its services. While OpenVPN isn’t lightweight, it is robust and secure.
The OpenVPN protocol might be bulkier regarding code, but that also means it doesn’t slack in the security department. For anyone looking for a tested and proven security protocol, OpenVPN is a must. The slight speed discrepancy is usually not noticeable to the average user, but the increase in security is undisputed. There are several VPN services using OpenVPN, but these are our favorites:
The biggest notable differences between WireGuard and OpenVPN are speed and security. While WireGuard is generally faster, OpenVPN provides heavier security. The differences between these two protocols are also their defining features. We’ve taken a closer look at each so you can really understand how they work.
WireGuard claims it’s easier to audit because it contains so much less code, but OpenVPN has a Community Edition that allows for continual audits from the open-source community.
With WireGuard, it’s easier to find and fix issues within the code because it’s so paired down. OpenVPN, on the other hand, has more protection for end users because of the amount of safety protocols written into its extensive code.
If you’re a casual user, like most people on the internet, you shouldn’t have a problem with compatibility with either of these protocols. NordVPN, which offers both protocols for various operating systems and platforms, is one of the most frequently used VPNs available. Users can manually switch between both protocols while using NordVPN on computers and mobile devices.
Your VPN can even be installed on your router to cover all your devices simultaneously. If you’re a programmer or developer, you may need to look more into the compatibility features of both protocols, but for the average person, you won’t need to worry.
There’s a notable difference in the encryption used by each of these protocols. OpenVPN uses standard AES-256 encryption, which is military-grade and so secure that cracking the code would take millions of years using our current computing technology.
WireGuard’s cryptography, on the other hand, uses ChaCha20. ChaCha20 has a shorter key length than AES-256. Its supporters claim that longer encryption keys are redundant and that ChaCha20 is just as effective at its current length.
It can be argued that due to WireGuard’s lighter code and shorter encryption key, it’s less secure than OpenVPN, but that really hasn’t been proven in real-world testing. OpenVPN, by nature, is considered to have better security because of its beefy code and open-source edition. That may not necessarily be the case, given the success security experts are having with WireGuard.
The WireGuard protocol has fast speeds. It's the faster of the two just by its nature and because of the lean code. It also processes packets with a simpler interface, cutting out the middleman in the processing stream. This means that less processing is necessary to get from point A to point B, which, in turn, makes it faster.
OpenVPN can’t compete with WireGuard’s speed simply because of the bulk of it, which leads to extra steps in processing packets. With a lot of the differences, we would say that it would be up to personal preference, but regarding speed, WireGuard wins.
As we’ve discussed, OpenVPN uses the classic SSL data protocol for delivery, while WireGuard uses User Datagram Protocol (UDP). The main difference is that SSL requires an authentication procedure called a handshake, while UDP doesn’t need a connection to communicate.
This is another reason why WireGuard is faster. The problem, however, is that there’s no tracking, so there’s no 100% guarantee that the packet will get where it needs to go. SSL is much more secure when it comes to delivery guarantees.
WireGuard is faster than OpenVPN in terms of speed, but OpenVPN may be better than WireGuard in terms of security.
Since WireGuard is still a relatively new protocol, only time will tell if its paired-down code and UDP transport layer will withstand the security provided by OpenVPN’s bulky code and SSL transport.
WireGuard uses UDP as a transport layer. This means it can send packets of information with connectionless communication. While this essentially speeds up your online activity, it also has the potential to reduce security.
With connectionless communication, your packets aren’t guaranteed to arrive at their intended destination.
NordVPN offers both WireGuard and OpenVPN. Few VPNs offer both, but you’ll have a choice when using NordVPN.
If you want to use OpenVPN most of the time for the added security, you can set it as the default and then switch to WireGuard if you need optimal speeds for a certain digital exchange, like P2P or torrenting.
When it comes down to it, the differences between these two protocols are not that noticeable to normal, everyday internet users. If you’re out there just browsing the web and streaming geo-restricted Netflix content, you’ll likely not have difficulty with OpenVPN’s slightly slower speed.
When updating your Pedro Pascal fan blog or sending emails back and forth to your aunt about who’s bringing what to the family potluck, WireGuard’s lighter security isn’t going to make a big difference. The most important thing is that you’re using a VPN to transfer data through these encrypted VPN tunnels.
If you choose one of the best VPNs, like NordVPN, that uses either protocol, you can have fun switching between them. Enable WireGuard for torrenting or online gaming so you ensure the best speeds and switch back to OpenVPN when logging in to your work accounts.
Now that you know the biggest differences between the two, you can approach your security from the best possible angle.
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