Choosing the right pricing model is as important as choosing the right price. The three dominant SaaS pricing models each have different revenue characteristics, scaling dynamics, and friction profiles.
Flat-rate pricing
Model: One price for all features, regardless of users or usage.
Examples: Basecamp ($299/mo for unlimited users), Buffer (flat plans).
Pros: Simple to explain, low cognitive load, easy to budget for customers.
Cons: Leaves money on the table from high-value customers, can't capture revenue as the customer grows, hard to expand MRR without explicit upsell motions.
Best for: Early-stage products trying to minimize friction, products with high per-user cost economics, products where usage is hard to define.
Per-seat pricing
Model: Charge per active user, team member, or license.
Examples: Slack, Notion, Linear, most B2B SaaS.
Pros: Revenue grows naturally as the customer adds users. Simple unit of value. NRR expands automatically without a sales conversation.
Cons: Discourages broad adoption (teams cap seats to save money). Creates per-seat shadow IT: team members share logins. Doesn't capture value from power users vs casual users.
Best for: Collaboration tools, workflow tools where the value is tied to team size.
Usage-based pricing
Model: Charge based on API calls, rows processed, messages sent, compute time, etc.
Examples: Twilio, Snowflake, AWS, OpenAI.
Pros: Perfectly aligns cost with value delivered. Removes the buyer's risk of "paying for what we don't use." Best NRR expansion possible (usage grows with customer revenue).
Cons: Unpredictable revenue and cash flow. Makes financial modeling harder. Customers may manage usage to minimize bills (reducing perceived value).
Best for: Infrastructure, APIs, platforms where usage is the obvious value metric.
Hybrid models
Many mature SaaS products use hybrid pricing: a flat platform fee + per-seat or per-usage charges. This provides a revenue floor (the platform fee) while capturing upside as the customer scales.
Use the SaaS Pricing Calculator to model your gross margin floor and three-tier pricing structure regardless of which model you choose.