Giving software away and charging later is a standard startup pattern. It works under specific conditions and fails expensively when those conditions are absent.
The free tier is a sales channel
Acquiring business customers through sales staff is slow and costly. A free tier replaces part of that process by letting people try the product without a conversation.
The cost of serving a free user is compared against the cost of the sales effort avoided. Where serving is cheap, the arithmetic favours the free tier.
This only holds if marginal cost stays low. Products with heavy compute or storage per user find the equation reverses as adoption grows.
Free users must do work for the company
A free tier that produces no benefit beyond usage is a subsidy. The useful versions have the free user generating something the company needs.
That might be inviting colleagues, producing public content that attracts search traffic, or building enough dependence that switching later becomes unattractive.
Where none of that happens, free users accumulate as a cost line and the conversion rate stays flat regardless of how many arrive.
The boundary decides the outcome
Setting the limit is the hardest design decision in the model. Too generous and nobody upgrades; too tight and nobody reaches the point of understanding the value.
The usual answer is to gate on scale or on features that only matter to an organisation, such as administrative control, permissions and audit history.
Gating on the core function tends to fail, because the free user never experiences why the product is worth paying for.
Conversion timing shapes the finances
A company acquires free users continuously but converts them slowly, so cost arrives before revenue. The gap must be funded out of capital.
The longer the average time to conversion, the more capital the model consumes, and the more sensitive the company becomes to funding conditions.
This is why companies with strong free adoption can still run into trouble. The model was working, just slower than the balance sheet allowed.
Withdrawing a free tier is costly
Removing or shrinking a free tier after adoption reliably produces public complaint, because users planned around the previous terms.
The users most affected are often the ones who recommended the product, which damages the channel the free tier was built to create.
Companies that set the boundary conservatively at the start rarely need this correction, and they retain the option of loosening it later.