Every VPN connection runs on an underlying protocol that determines how your traffic gets encrypted, tunneled, and delivered. Most business VPN providers today let you choose between WireGuard and OpenVPN, and the choice actually matters — it affects speed, battery life on mobile devices, and how easily your connection recovers when you switch networks mid-call. This guide breaks down the practical differences we found after testing both protocols side by side across the same VPN provider and hardware, and gives a clear recommendation for different team situations.
This is a companion piece to our VPN comparison guide, which covers choosing a provider. This guide assumes you already have a provider and are deciding which protocol setting to use.
What a VPN protocol actually does
A VPN protocol is the set of rules that governs how your device establishes an encrypted tunnel to the VPN server, how it authenticates that connection, and how it handles the ongoing exchange of encrypted packets. Two devices using different protocols cannot connect to each other directly — the protocol has to match on both ends, which is why most VPN apps let you pick a protocol in settings rather than having one baked in permanently.
OpenVPN has been the industry standard for over a decade, built on well-tested, widely audited open-source code. WireGuard is newer, designed from the ground up to be simpler, faster, and easier to audit, with a codebase that is a small fraction of the size of OpenVPN’s.
What we tested
We connected to the same VPN server location using both protocols, back to back, across three scenarios: a stable home broadband connection, a mobile hotspot with a moderately weak signal, and a network switch mid-session (moving from Wi-Fi to mobile data, simulating someone leaving their home office and continuing a call from their phone).
We measured raw throughput, connection re-establishment time after a network switch, and battery drain on a mobile device left connected for several hours in the background.
Speed: WireGuard wins consistently
WireGuard delivered noticeably faster throughput in every test we ran, typically 15-30% higher than OpenVPN on the same connection and server. This gap is consistent with WireGuard’s leaner codebase, which processes packets with less overhead. On a stable home connection the difference was noticeable but not dramatic; on the weaker mobile hotspot connection, the gap widened, since OpenVPN’s additional overhead compounds when bandwidth is already constrained.
For teams doing video calls, screen sharing, or transferring large files over the VPN regularly, this speed difference is not just a benchmark number — it is the difference between a call that stutters occasionally and one that runs smoothly.
Reconnection after a network switch
This was the most dramatic difference we found. When switching from Wi-Fi to mobile data mid-session, WireGuard reconnected almost instantly — typically under two seconds, often without any noticeable interruption to an active video call. OpenVPN took considerably longer to re-establish the tunnel, in some tests over ten seconds, during which time active connections dropped and needed to be manually re-established by whatever application was using them.
For remote and hybrid teams where people frequently move between networks — leaving a co-working space, switching from office Wi-Fi to a phone hotspot during a commute — this reconnection speed has a real impact on day-to-day usability, far more than the raw throughput numbers.
Battery life on mobile devices
WireGuard’s simpler packet processing also translated into measurably better battery life during our extended background connection tests. Over a six-hour period with the VPN connected but the phone otherwise idle, the WireGuard connection used noticeably less battery than the equivalent OpenVPN session. This matters specifically for team members using a VPN throughout the workday on a phone that also needs to last through in-person client meetings, calls, and everything else a workday involves.
Where OpenVPN still has an edge
WireGuard is not strictly better in every scenario. OpenVPN’s longer track record means it has been audited far more extensively over a longer period, and some highly regulated industries specifically require or prefer protocols with that longer audit history for compliance reasons. If your team operates under specific regulatory requirements that name OpenVPN or an equivalent proven protocol explicitly, that requirement should take priority over the performance benefits described above.
OpenVPN also has more configuration flexibility for advanced network setups — custom port configurations, more granular routing rules, and broader compatibility with older enterprise firewall and networking equipment that may not yet support WireGuard.
Encryption: different approaches, similar strength
WireGuard uses a fixed, modern set of cryptographic algorithms — ChaCha20 for encryption, Poly1305 for authentication, and Curve25519 for key exchange — chosen specifically for their combination of strong security and fast performance on modern hardware. This fixed approach is part of why WireGuard’s codebase is so much smaller: it does not need to support the wide range of configurable cipher options that OpenVPN does.
OpenVPN supports a much broader range of configurable encryption ciphers, which offers flexibility but also creates more room for a misconfiguration — an administrator choosing a weaker or outdated cipher option for compatibility reasons, for example. In practice, most modern OpenVPN deployments default to strong, current ciphers, but the configurability itself is a meaningful difference in how much can go wrong at setup time.
For a small team without a dedicated security engineer reviewing every configuration option, WireGuard’s fixed, modern defaults remove an entire category of potential misconfiguration simply by not offering the option to configure it incorrectly in the first place.
Compatibility with older devices and operating systems
OpenVPN has broader support across older operating system versions and legacy hardware, simply due to having been available for much longer. If your team includes anyone working from an older company laptop that has not been updated in several years, or specific embedded/IoT devices that need VPN connectivity, verify WireGuard support before assuming it will work identically across your entire device fleet.
Modern operating systems — recent versions of Windows, macOS, iOS, Android, and current Linux distributions — all have solid WireGuard support at this point, either natively or through well-maintained apps. The gap only really shows up on hardware or software that has fallen significantly behind on updates, which is itself often a separate security concern worth addressing regardless of VPN protocol choice.
Our recommendation
For most small teams and remote workers: Use WireGuard as your default protocol. The speed, reconnection time, and battery benefits are substantial enough to matter in daily use, and WireGuard has now been widely audited and adopted across the industry to the point that the “too new to trust” concern from a few years ago no longer holds up.
For teams with specific compliance requirements: Check your regulatory obligations before switching. If OpenVPN is explicitly named in a compliance framework your business must follow, stay on OpenVPN for the affected systems even if WireGuard is available as an option.
For teams with older network hardware: Verify your firewall and router hardware supports WireGuard before switching everyone over. Older enterprise networking equipment sometimes has better-tested OpenVPN support, and a failed migration mid-workday is worse than simply staying on the protocol that already works reliably.
What this means day to day
Protocol choice is one of those settings that most people never think about until it causes a problem — a dropped call during a commute, a laptop that dies faster than expected during a long travel day, a VPN connection that takes noticeably longer to reconnect after switching networks in a coffee shop. None of these are dramatic failures on their own, but they add up to a meaningfully worse day-to-day experience across a team using a VPN for hours every workday.
The good news is that switching is usually low-risk and reversible, which is why we recommend most teams simply try WireGuard as a default rather than treating this as a high-stakes migration decision. If something breaks for a specific person or use case, switching back is typically a single setting change rather than a lengthy reconfiguration process.
How to switch protocols without disrupting your team
Most business VPN providers let you set a default protocol at the account level, with the option for individual devices to override it. Rather than switching everyone simultaneously, a safer rollout looks like this:
1. Test WireGuard yourself for a few days across your typical work patterns, including any specific tools or client VPN whitelisting your role depends on.
2. Roll out to a small group of teammates who are comfortable reporting issues, rather than the whole team at once.
3. Confirm any client-side IP whitelisting still works, since some clients whitelist a specific VPN exit IP that could differ between protocols depending on your provider’s server architecture.
4. Once confirmed stable, update the default protocol setting for the team and communicate the change, including how to manually switch back to OpenVPN if any individual runs into an issue.
Frequently asked questions
Is WireGuard less secure because it is newer?
No — WireGuard uses modern, well-regarded cryptographic primitives and has undergone substantial independent security review since its release. Its smaller codebase is actually considered a security advantage by many researchers, since a smaller amount of code is easier to audit thoroughly than a much larger, more complex one.
Can we run WireGuard and OpenVPN at the same time for different team members?
Yes, most providers support this without issue, since the protocol choice is generally per-connection rather than an account-wide lock. This is actually a reasonable way to roll out a switch gradually, as described above.
Does the protocol choice affect which VPN provider we should use?
Not directly — nearly every major business VPN provider now supports both protocols. Provider choice should still come down to the factors covered in our VPN provider guide: audited no-logs policies, kill-switch reliability, and admin tooling, with protocol as a setting you choose after picking a provider.
Will switching protocols break our existing VPN configuration?
Typically no, if you are using a standard business VPN app rather than a fully custom self-hosted setup — switching is usually a setting within the same app rather than a full reconfiguration. For self-hosted VPN servers, switching protocols is a more involved change and should be tested in a non-production environment first.
Does WireGuard cost more than OpenVPN with our provider?
No — both protocols are typically included at no extra cost as a setting within the same subscription plan for virtually every business VPN provider we have tested. Protocol choice is a configuration option, not a pricing tier.
For more on building a complete security stack for your team, see our hardening guides and full tool reviews section.