Definition (canonical)
Freemium is a model where a functional free tier acquires users at scale, and a paid tier monetizes the fraction who need more. The free product is not charity — it is a marketing channel whose cost is servers instead of ads, and whose success is measured in one number: free-to-paid conversion.
The economics — when the math works
Typical freemium converts 2–5% of free users to paid (great products with natural upgrade pressure reach 8–10%). The viability equation: value of converted users must exceed the cost of serving ALL free users plus their support. That works when marginal cost per free user is near zero (software, yes; anything with humans or hardware in the loop, rarely) and the free base compounds other assets: virality (free users invite), network effects, data, SEO content. Freemium is thus a CAC strategy — compare its all-in cost per paid customer against paid channels, not against "free".
Where to draw the paywall
The craft is the limit design. Usage limits (projects, storage, contacts): grow-into-paying — the classic; feature gates (SSO, integrations, reporting): monetize sophistication — the B2B default, with "the enterprise trio" (SSO, audit, permissions) as reliable paid anchors; capacity/seats: teams pay, individuals ride free — monetizes collaboration; outcome caps (responses, sends): pay when it works. Two design tests: the free tier must deliver REAL standalone value (crippled demos acquire nobody) and the paywall must sit on a natural growth path — the user hits it BECAUSE the product worked. If your best users never hit any limit, the wall is in the wrong place.
When freemium kills
Failure patterns: cannibalization — free is good enough for the segment that would have paid (prosumer tools bleed here); support drag — free users generating human costs that eat the model; anchor damage — a market educated that your category costs nothing; vanity trap — celebrating millions of free users with three-digit paying counts. Alternatives worth testing first: free trial (time-boxed full product — higher conversion, less viral reach) and reverse trial (start on premium, drop to free) — data increasingly favors trials for B2B tools, freemium for network products and PLG land-grabs.
FAQ
Freemium vs open source? Different logic: OSS monetizes hosting/support/enterprise around a free core; freemium monetizes tiers of one product — some companies stack both.
Should free users see ads? Rarely worth it in B2B (pennies, brand cost); in consumer scale plays, ads become the actual model rather than freemium.
How long should users stay free? Forever — that's the point; pressure comes from limits and growth, not expiry. If you need expiry, you want a trial.
Related: Pricing · SaaS · Conversion · CAC Reviewed: 2026-07-16 · Sources: SaaS growth canon