Stop Building Everything: Why VPN APIs Make Sense for SaaS Products
One of the hardest decisions in software engineering isn't how to build something.
It's deciding whether you should build it at all.
Authentication? Payments? Notifications? Billing?
Most engineering teams don't build these systems from scratch anymore.
They integrate them.
So here's another question:
If your application needs secure connectivity, should you build your own VPN infrastructure?
It's Easy to Underestimate VPN Infrastructure
At first glance, a VPN seems straightforward.
Encrypt traffic.
Authenticate users.
Route connections.
Done.
Until you start planning for production.
Now you're responsible for:
- Global server infrastructure
- Authentication and authorization
- Multiple VPN protocols
- Key and certificate management
- Monitoring and observability
- Failover and redundancy
- Regional routing
- Compliance and security updates
- Ongoing maintenance
At that point, you're no longer building a feature.
You're operating an infrastructure platform.
The Real Cost Isn't Infrastructure
Cloud costs are easy to estimate.
Engineering time isn't.
Every sprint spent maintaining VPN infrastructure is a sprint not spent improving your product.
Every engineer debugging network issues isn't building features your customers actually notice.
Infrastructure has an opportunity cost.
For most SaaS companies, that's the bigger expense.
Build vs. Buy
Most engineering teams are capable of building a VPN.
The better question is:
Should they?
Before writing the first line of code, ask yourself:
- Does VPN infrastructure differentiate our product?
- Will customers choose us because we built our own VPN?
- Is secure networking part of our core business?
- Are we prepared to operate and maintain this long term?
If the answer is "no," building it may not be the best investment.
APIs Have Changed Modern Software Development
Think about how modern applications are built today.
Need authentication?
Use Auth0, Clerk, or Cognito.
Need payments?
Use Stripe.
Need email delivery?
Use Resend, Postmark, or SendGrid.
Need cloud infrastructure?
Use AWS, Azure, or Google Cloud.
Developers increasingly assemble products by integrating specialized services.
Secure connectivity is following the same path.
Instead of operating VPN infrastructure, many teams are integrating VPN APIs that provide encrypted connectivity while letting engineers stay focused on building their products.
Customers Don't Care How You Built It
Users rarely ask:
"Did you build your own VPN infrastructure?"
They care about outcomes.
They want:
- Secure connections
- Reliable performance
- Fast access
- A seamless experience
The infrastructure is invisible.
The experience isn't.
Engineering Focus Is a Competitive Advantage
Every roadmap has limited capacity.
Every infrastructure project competes with product development.
Choosing to own another infrastructure layer usually means delaying something else.
That's why the real question isn't:
Can we build this?
It's:
Is this the highest-value problem our engineers should be solving?
That's a much harder—and more valuable—question.
Final Thoughts
This isn't really about VPNs.
It's about engineering leverage.
Every mature engineering organization eventually decides which capabilities belong in-house and which are better delivered through integrations.
VPN infrastructure is becoming another example of that decision.
Some companies absolutely benefit from owning the stack.
Many don't.
And that's perfectly fine.
Building less infrastructure often means shipping more product.
Discussion
If your application required secure connectivity today, what would you choose?
- Build your own VPN infrastructure?
- Self-host WireGuard or OpenVPN?
- Integrate a VPN API?
I'd love to hear how your team approaches the build vs. buy decision.
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