This is one of the most common architecture questions we get from non-technical founders: "Should I build my own API or just use [existing service]?" The answer depends on what you are trying to do.
When to Use a Third-Party API
If a service already solves your problem reliably, use it. Common examples:
- Payments: Stripe or Paystack. Building a payment system from scratch is dangerous and unnecessary.
- SMS/Email: Twilio, SendGrid, Mailgun. These are solved problems.
- Maps: Google Maps or Mapbox. The complexity of building this is extreme.
- Auth: Auth0 or Firebase Auth for simple cases.
The ROI of building these yourself is negative in almost every case.
When to Build a Custom API
Build a custom API when:
- Your data model is unique and no existing service matches it.
- You need full control over the logic, performance, and cost at scale.
- You are building a platform that other apps will consume (mobile app + web app + partner integrations).
- Third-party pricing becomes a problem at your scale (per-request or per-seat fees).
The Hybrid Approach (Most Common)
Most apps we build use both: a custom REST API backend (Laravel or Node.js) that handles the core business logic, combined with third-party APIs for commoditized services (payments, communications, etc.).
This gives you ownership of what makes your product unique while not reinventing the wheel for infrastructure services.
Getting This Decision Right Early
The architecture decision you make at the start of a project is expensive to undo later. If you are unsure, a one-hour consulting call to map out your integration architecture before you write a line of code can save months of rework.