OpenVPN vs WireGuard vs Tailscale for SMEs

"VPN" gets used as a catch-all term, but the three tools people usually mean when they say it, OpenVPN, WireGuard, and Tailscale, solve the same underlying problem in genuinely different ways. Picking one isn't really a matter of taste. It's a matter of how much networking you want to own versus how much you want handled for you.

What problem a VPN is actually solving

Most business systems, a file server, an admin dashboard, a database, an internal tool, were never designed to be exposed directly to the public internet. A VPN creates a private, encrypted path into that internal network so the right people can reach those systems from outside the office, without putting them in front of every scanner and bot on the internet.

Staff working from home or a coffee shop need to reach internal tools that only exist on the office network.
A business with more than one location, an office and a warehouse, for example, wants both to behave as one private network.
A contractor or freelancer needs access to one specific server or tool, not a free pass onto your entire network.
You want internal systems to be invisible to the open internet instead of sitting behind a public IP and a firewall rule.

Same goal, three very different tools

OpenVPN and WireGuard are protocols and software you run yourself, on your own server, with your own configuration. Tailscale is a managed product built on top of WireGuard's encryption, but with a coordination layer on top that handles the parts most people find painful about running a VPN in the first place.

OpenVPN: the incumbent

OpenVPN has been the default choice for close to two decades. It's an SSL/TLS-based VPN that runs as software on a server you control, authenticating users with certificates or credentials, and it's supported by nearly every router, firewall, and operating system in existence.

Strengths

Extremely mature and battle-tested, with support baked into almost any router or firewall on the market.
Highly configurable: fine-grained access rules, multiple authentication methods, and routing behaviour you can tune in detail.
Can run over port 443, the same port as normal web traffic, which lets it get through restrictive networks that block most VPN traffic outright.

Weaknesses

A much larger codebase than the alternatives, which means a larger attack surface and more history of vulnerabilities to patch.
Noticeably slower than WireGuard-based options, especially on lower-powered devices, due to older cryptography and a heavier connection process.
Configuration files are dense and unforgiving. Getting client certificates, routing, and firewall rules right usually needs someone who's done it before.

WireGuard: the modern protocol

WireGuard was built from scratch to fix what OpenVPN gets wrong: it's a fraction of the code (roughly 4,000 lines, versus OpenVPN's several hundred thousand), uses modern, fast cryptography, and is now built directly into the Linux kernel. On paper, it's simply a better tunnel.

Strengths

Significantly faster and lighter on battery and CPU, which matters a lot on phones and laptops moving between networks.
A tiny, auditable codebase that's easier to trust and easier to patch than a legacy VPN stack.
Connections re-establish almost instantly after a network change, like switching from wifi to mobile data.

Weaknesses

It's a protocol, not a product. Out of the box there's no user management, access policy, or admin dashboard, you build or bolt on all of that yourself.
Authentication is just a static public/private keypair. There's no built-in way to revoke a single device without editing server config directly.
No native handling for devices with changing IPs sitting behind NAT trying to reach each other directly. You're responsible for that plumbing.

Tailscale: the managed mesh

Tailscale uses WireGuard for the actual encrypted tunnel, but wraps it in a coordination service that handles everything WireGuard leaves out: authentication through your existing Google, Microsoft, or Okta login, automatic key rotation, NAT traversal so devices connect directly without port forwarding, and access rules written as a simple policy file instead of firewall commands.

Strengths

Setup is close to instant: install it, log in with your work account, and a device is on the network in minutes, no server to stand up.
Every device connects directly to every other authorized device (a mesh), not through a single choke-point server, which keeps performance close to WireGuard's.
Access policy is per-user and per-device, so a contractor can be scoped to exactly one internal tool instead of the whole network.
Key rotation, device removal, and audit logs are handled for you, which removes most of the ongoing admin overhead of the other two options.

Weaknesses

It's a third-party SaaS product: your access policy and device coordination depend on Tailscale's control plane being reachable, even though the actual data stays peer-to-peer.
The free tier caps out on users and devices, and per-user pricing adds up for larger teams.
Less low-level control than running your own OpenVPN or WireGuard server, which matters if you have very specific routing or compliance requirements.

If vendor lock-in worries you: self-hosting the coordination layer

The dependency on Tailscale's control plane is the main objection technical teams raise, and it's a fair one. The answer, if it matters enough to you, is Headscale: an open-source, self-hosted reimplementation of Tailscale's coordination server. It speaks the same protocol, so the same client apps and the same mesh networking behaviour work, but the piece that decides who's authorized and how devices find each other runs on infrastructure you control instead of a third party's.

Running Headscale isn't free in terms of effort, you're back to maintaining a server, which is part of what Tailscale exists to avoid. But it's worth knowing this middle ground exists: you can get most of Tailscale's operational simplicity without depending entirely on Tailscale as a company, which matters if your compliance requirements are strict about where control and metadata live.

Performance in practice, not just on paper

The speed difference between WireGuard-based tunnels and OpenVPN is easiest to notice on a mobile device switching networks, walking from a wifi-covered office into a lift, then onto mobile data outside. OpenVPN typically needs to renegotiate the connection from scratch, which can take several seconds and sometimes drops the tunnel entirely until you manually reconnect. WireGuard-based tools, including Tailscale, tend to resume near-instantly, because the protocol was designed around exactly that kind of network change rather than treating it as an edge case.

For a desk-bound server-to-server connection, that difference barely matters. For staff who are actually moving around, between client sites, out in the field, on a phone between wifi and mobile data all day, it's the difference between a VPN that quietly stays connected and one that needs to be manually poked back to life several times a day.

Which one fits your business

In practice, the decision usually comes down to how much networking work you actually want to take on.

Small team, no in-house network engineer, need staff and contractors to reach internal tools quickly: Tailscale. The setup time alone pays for the per-user cost.
Legacy or on-prem infrastructure that needs granular firewall rules, or a network team that already knows how to run one: OpenVPN, especially where it needs to blend in as normal web traffic.
You're building your own infrastructure and want the leanest, fastest tunnel with full control over every setting: WireGuard, self-managed.

The best VPN for a small business is rarely the most powerful one. It's the one someone will actually keep patched and configured correctly six months from now.

For most SMEs without a dedicated IT team, that tips the decision toward Tailscale by default, and toward OpenVPN or self-managed WireGuard only when there's a specific technical reason to run the infrastructure yourself. Secure remote access is a small piece of the broader digital operation, but it's the kind of thing that's invisible when it works and a real liability when it doesn't.