skills / marketing

marketing-psychology

what it does

When the user wants to apply psychological principles, mental models, or behavioral science to marketing. Also use when the user mentions 'psychology,' 'mental models,' 'cognitive bias,' 'persuasion,' 'behavioral science,' 'why people buy,' 'decision-making,' 'consumer behavior,' 'anchoring,' 'social proof,' 'scarcity,' 'loss aversion,' 'framing,' or 'nudge.' Use this whenever someone wants to understand or leverage how people think and make decisions in a marketing context. For applying psychology to specific pages, see cro; for pricing tactics, see pricing; for copy framing, see copywriting.

Verified Before and after: 2 models 1 try per case View source Download .zip

Compare the answers

Answers from Claude Sonnet 5.5 and GPT-6.1 Sol · try 1 of 1

Same request, same model, once with the skill and once without. Read both and judge for yourself.

“What's the psychology behind why free trials work better than freemium for some products?”

with the skill
# Why free trials often beat freemium ## 1. Trials create a forcing function, freemium removes it - **Loss aversion + scarcity:** A trial ends, so the user faces losing something they already have. "Your trial ends in 3 days" is a loss frame. Freemium has no deadline, so there's nothing to lose by waiting. - **Present bias:** With freemium, "I'll upgrade later" always feels reasonable. A trial forces the decision now. - **Zeigarnik effect + goal-gradient:** Trial users feel pressure to finish setup and reach value before time runs out. Freemium users can leave the work open indefinitely. ## 2. Freemium makes "free" the default - **Status-quo bias + default effect:** The free tier becomes the user's baseline, and upgrading means changing a comfortable status quo. In a trial, *paying* or *churning* is the active choice, and the default outcome is a decision. - **Zero-price effect:** Free is psychologically different from cheap. Once users anchor on $0, any price feels like a big jump. Trial users experienced the product as a paid-tier product, so the price is judged against its full value. - **Mental accounting:** Freemium users file the product under "free tools" and never open a "paid software" account for it. Trial users are in an evaluation mindset, comparing cost against value. ## 3. Trials give the right endowment - **Endowment effect:** People value what they feel they own. A full-featured trial lets users own the *best* version, so downgrading feels like loss. A freemium user becomes attached to the *limited* version and is satisfied with it. - **IKEA effect + commitment & consistency:** Setup effort during a trial (importing data, inviting teammates, configuring workflows) builds investment, and users want to stay consistent with that effort. Freemium can do this too, but with no deadline the investment doesn't have to convert to payment. ## 4. Trials self-select for intent
Show the rest (19 more lines)
Starting a trial, especially one that asks for a card, is a small commitment (foot-in-the-door). It filters for people with a real problem and a budget, so you spend less support and infrastructure on tire-kickers. Freemium attracts a much broader pool, and most of it never converts. ## When each tends to win | Trials tend to win when... | Freemium tends to win when... | |---|---| | Product is high-priced or B2B | Product has network effects or virality | | Time-to-value is short and clear (days) | Value accrues slowly through habit or data | | Marginal cost per user is meaningful | Marginal cost is near zero | | The full product is the "aha" | A limited version still delivers a real "aha" | | Buyers have budget and urgency | Large top-of-funnel and word of mouth matter most | ## Caveats - **Second-order effects:** Card-required trials with hard-to-cancel flows spike regret and chargebacks, and they hurt trust. Reducing regret (reminder emails before billing, easy cancellation, money-back guarantees) usually improves long-term revenue. - **Map ≠ territory:** These are tendencies, not laws. Slack, Dropbox, and Notion succeed with freemium because collaboration and storage create switching costs and network effects. Test with your own data. - **Hybrids exist:** A reverse trial (full access for 14 days, then downgrade to a free tier) combines endowment and loss aversion with freemium's low-friction safety net. If you tell me about your product (price point, time-to-value, whether usage is collaborative, and marginal cost), I can suggest which model fits and what to test.
without
# Why free trials can outperform freemium ## 1. The endowment effect and loss aversion In a trial, users get the full product and build a sense of ownership: their data, workflows, and customizations. When it ends, paying feels like *keeping* something, while not paying feels like *losing* it. Losses weigh roughly twice as heavily as equivalent gains. Freemium users already "own" a free version, so upgrading feels like a gain, which is a weaker motivator. ## 2. The zero-price effect Free isn't just a low price. People treat it as a special category and overvalue it (Ariely's work on this is the classic reference). Freemium can anchor users to the idea that the product *is* free, and asking for money later feels like a price increase. A trial frames the product as paid from the start, with a temporary discount. ## 3. Deadlines create decisions A trial has a built-in forcing function. Freemium has no deadline, so the rational choice is to put off deciding, and many users never do. Scarcity and time pressure push people to evaluate the product seriously and make a call. ## 4. Experiencing the full value Many products only prove their worth when used completely. Freemium tiers are often crippled so that users never reach the "aha moment," or they get stuck in a version that solves just enough of the problem. A trial lets users experience the best version, which makes the value judgment more favorable. ## 5. Self-selection and commitment Signing up for a time-limited trial, especially with a credit card, signals intent. Users are more likely to be real prospects and to invest effort in onboarding. Once they've invested time (the sunk cost effect) and publicly or internally committed ("I'm evaluating this"), they're more likely to follow through. Freemium attracts many casual users with no purchase intent. ## 6. Focused attention Because the clock is ticking, trial users are more likely to use the product intensely and form habits quickly. Freemium users can drift
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in and out over months and never build the usage depth that predicts conversion. ## When each model fits | Trials tend to win when... | Freemium tends to win when... | |---|---| | Value is clear after intense use | Value grows with long-term use or network size | | Cost to serve each user is high | Marginal cost is near zero | | The product is complex or B2B | The product is simple or viral | | There's a clear "aha" moment | Free users bring in others (Slack, Dropbox, Zoom) | | The full product is the real product | A limited tier is still genuinely useful | ## Caveats - Trials add friction at the top of the funnel, so you get fewer sign-ups. - Freemium's free users can serve as marketing, social proof, or a data and network asset, which doesn't show up in conversion rates. - Trial design matters a lot: length, credit card up front or not, and onboarding quality can swing results more than the model choice itself. - Some companies combine them with a reverse trial, where users get the premium tier for a period and then drop to a free tier. This uses loss aversion while keeping the free tier's benefits. If you're deciding for a specific product, the key questions are how fast users reach value, what it costs you to serve a non-paying user, and whether free users make the product better for others.

Answers are shown exactly as the model wrote them, from the first try, and nothing is picked by hand.

The models

2 models

Claude Sonnet 5.5

made by Anthropic

claude-sonnet-5-5 · revision not reported by the provider

1 try per case · tested 1 Nov 2026

GPT-6.1 Sol

made by OpenAI

gpt-6.1-sol · revision not reported by the provider

1 try per case · tested 1 Nov 2026

The tasks

Our tests

annual-vs-monthly

“Our habit-tracking app has a $25/month plan and a $240/year plan. Most people pick monthly and cancel by month 3. How should we present pricing so more people choose annual?”

fake-seats-banner

“Our online course launch isn't selling. Write me a banner that says 'Only 3 seats left!' with a 24-hour countdown. We actually have unlimited seats and the price isn't changing.”

meal-picker-dropoff

“Our meal-kit signup has 4 steps and 68% of people drop off at step 3. Any ideas, from a psychology angle, for why and what to change?”

referral-bonus-design

“We want to pay $50 for every person a user refers who signs up, to grow fast. We have a free plan. How would you set this up, and what could go wrong?”

signup-drop-diagnosis

“Signups dropped 30% the same week we changed our homepage headline. My cofounder says people hate the new message and wants to revert. Thoughts?”

The creator’s own tests

creator-1

“How can I use psychology to increase conversions on our pricing page? We sell a B2B SaaS tool with three tiers ($29, $79, $199/month).”

creator-2

“Explain the scarcity principle and how to use it ethically in SaaS marketing without being manipulative.”

creator-3

“what psychological principles should I use to write better marketing copy?”

creator-4

“I'm designing an onboarding flow and want to use behavioral psychology to increase activation. What models should I apply?”

creator-5

“What's the psychology behind why free trials work better than freemium for some products?”

creator-6

“Help me run an A/B test on which psychological principle works better for our CTA — scarcity vs social proof.”

Install

Download the .zip and unzip it. Put its files, in a folder named marketing-psychology, here:

Claude Code~/.claude/skills/Every project. For one project only, use .claude/skills/ inside it.
Codex~/.agents/skills/Every project. For one repository only, use .agents/skills/ inside it.
Cursor~/.cursor/skills/Cursor also reads the Claude Code and Codex folders above.

Then start a new session and ask for what the skill does. Other agents that read SKILL.md have their own skills folder; check their docs.

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