“Should we go subscription or usage-based?” This is the most common pricing question SaaS founders bring us. And most answers amount to following whichever camp is currently fashionable.
Below are five decision axes for choosing between them, drawn from work with companies that have actually made the switch.
The essential difference
On the surface the two models differ only in the charging unit. In practice they decide how the company operates in its market.
| Subscription | Usage-based | |
|---|---|---|
| Revenue predictability | Very high | Low, variable |
| Barrier to adoption | Medium to high | Very low |
| Customer cost predictability | High | Low, creates unease |
| Margin stability | Medium | High, usage and cost aligned |
| Sales cycle | Long, contract negotiation | Short, self-serve |
| LTV predictability | High | Medium |
Subscription gives the company revenue stability. Usage gives it margin stability. Which you need more determines the answer.
Five decision axes
Axis 1: does value scale with usage?
The first question to ask. If the customer gains more the more they use the product, usage-based follows naturally.
- Usage fits — API calls, cloud infrastructure, payment processing, AI tokens. Value comes from consumption.
- Subscription fits — collaboration tools, CRM, design tools. The value is that it is there at all.
Axis 2: does your cost scale with usage too?
If serving one more unit costs you money, usage-based pricing is how you protect margin.
- Infrastructure, AI API, and transaction fees rise with usage → usage-based
- Build once and sell without limit (classic SaaS) → subscription
Axis 3: how wide is the variation between customers?
If your heaviest customer uses fifty times what your lightest does, a single flat fee will either lose money on one end or fail to sell on the other.
- Wide variation → usage-based or hybrid
- Narrow variation → subscription
Axis 4: how much does the customer value cost predictability?
In enterprise procurement, an unpredictable bill often fails the approval process regardless of the total.
- SMBs and self-serve developers accept usage-based readily
- Enterprises prefer subscription, or usage with a cap
Axis 5: how badly do you need revenue predictability?
Before a funding round or with a board watching ARR, subscription revenue carries a weight that usage revenue does not.
- Seed to Series A — predictability matters most. Subscription is the safe answer.
- After Series B — lowering the barrier and recovering value from large accounts matters more. Move to usage or hybrid.
- Growth-stage SaaS — hybrid is the default (subscription plus overage).
The third answer: hybrid
Answer those five axes honestly and it is surprisingly rare for the decision to fall cleanly to one side. Which is why hybrid is becoming the SaaS default in 2026.
How the hybrid model works
- A flat base subscription, for example $99 per month for a Pro tier
- A stated allowance included in the tier, for example 10,000 API calls per month
- Usage above that charged per unit, for example $0.001 per call
- Upgrading a tier brings a larger allowance and a lower overage rate
This gives the company revenue predictability from the subscription part and margin stability from the usage part, while the customer gets both cost predictability and flexibility. AWS, Datadog, and Twilio all take this shape.
How pricing should evolve by stage
| Stage | Model that fits | Why |
|---|---|---|
| Seed to Pre-A | Simple subscription, 1–2 tiers | Predictability and validation first. Keep complexity down. |
| Series A | Subscription, 3–4 tiers | Segment optimisation begins |
| Series B | Introduce hybrid | Recover value from large accounts, lower the entry barrier |
| Series C and beyond | Hybrid plus enterprise custom | Room to negotiate large deals |
Three mistakes to avoid
- Do not copy a competitor’s model. Same market, different cost structure and value metric, different answer.
- Do not change everything at once. Apply the new model to new customers and migrate existing ones in stages.
- Do not let usage-based read as “cheap”. Price has to reflect value. Set the unit rate too low and the margin disappears.
Closing
Subscription and usage-based are not enemies. They are different answers for different stages of the same business. What matters is answering honestly about where your company is now and what your value metric actually is.
And not carrying one answer forever. A pricing model evolves with the company.
📩 If you want a read on which pricing model fits your company, start with the Pricing Check.