The platform business model
A platform provides infrastructure or tools that other businesses build on top of — it rarely owns the end customer relationship for whatever gets built on it, which is exactly what makes the model scale.
The basics
Infrastructure, not a finished product
Payment rails, developer APIs, and app stores are all platforms — they succeed by being the thing other companies build their own products on top of, rather than selling directly to the platform’s own end customers.
Ecosystem lock-in
Once a business has integrated a platform deeply into its own product, switching costs rise — this is the core of a platform’s moat, distinct from a marketplace’s network effect between buyers and sellers.
Single-customer concentration risk
Platforms often depend on a relatively small number of large business customers for the bulk of revenue — see our infrastructure sector guide for how this affects diligence.
A worked example
A payments-infrastructure platform charges client apps a small integration fee plus a per-transaction fee. Here is the revenue from one mid-sized client.
| Amount | |
|---|---|
| Monthly integration/API fee | $500 |
| Transaction volume processed | $2,000,000/month |
| Per-transaction fee | 0.3% |
| Transaction fee revenue | $6,000/month |
| Total revenue from this client | $6,500/month |
Illustrative — platform pricing structures vary widely, often combining a flat fee with usage-based charges (see our usage-based revenue model guide).
What to check before investing
Ask how many businesses are actually integrated and generating meaningful volume, not just how many have signed up — platform businesses can have impressive logo counts with only a handful of clients driving real revenue.
Also confirm what would happen if the platform’s single largest client left — this concentration risk is one of the more common reasons an otherwise well-built platform business struggles to raise its next round.