Two offers look alike on a pricing page and behave nothing alike. Knowing which one you are being given changes how you evaluate a tool, and it changes what you may do with what you produce.
The structural difference
A free plan is the product with limits, running indefinitely. You can install it, use it for the two days a month you need it, and never pay. The vendor is betting your usage grows.
A free trial is the paid product on a clock, usually with a card on file. The vendor is betting you will forget to cancel, or that you will have built something you cannot abandon by day fourteen.
The second is not dishonest, but it is a different transaction, and it should change your evaluation plan.
What free plans really cap
Almost never the model. Free tiers usually run the same models as paid ones and cap something else, which is why “the free version is worse” is generally the wrong mental model.
Fireflies is the clearest case: transcription and AI summaries are unlimited on the free plan, and what is capped is storage, 400 minutes shared across the whole team. Gemini gives Deep Research, Canvas, Gems and image generation for free, capped on usage rather than on features. Grammarly corrects spelling, grammar and tone with no expiry, and caps generative prompts at 100 a month.
So the question is not what the free plan can do. It is which number runs out first for you, and how soon.
What free plans quietly take
Three things, and they rarely appear next to the price.
The licence. Suno songs made on the free plan stay non-commercial, and upgrading later does not clear them retroactively. ElevenLabs free output requires attribution. Several image generators watermark exports. If the output is going anywhere public, the free tier is often not a smaller version of the paid one, it is a different licence.
Privacy. Free tiers are where training on user content is most common and where output is most often published publicly by default. Ideogram and Leonardo both publish free-plan generations to a public feed, which matters for anything you have not announced.
Your data going in. An opt-out on a consumer free plan is a setting, not a contract.
When a trial is the honest offer
Some products cannot give the thing away. Midjourney ended its free trial in 2023 and has no free tier at all, because every generation costs GPU time. Synthesia gives 10 minutes of video a month free but locks downloads, which makes it a demo rather than a tier.
Neither is a trick. When the marginal cost of the product is real, a trial is the more truthful structure, and a “free plan” that watermarks everything would be worse.
How to run either one properly
Do not test the demo. Test the thing you would actually ship: your worst recording, your real brief, a 1,500 word piece rather than a paragraph, a two-accent call rather than a solo one. Tools separate on the hard case and look identical on the easy one.
On a trial, decide the cancel date before you start and put it in the calendar. On a free plan, note which number ran out first, since that tells you what the upgrade actually buys.
The free AI tools hub lists every tool here whose free plan has no end date, with its exact caps and the date each price was checked.
