Module 2: Product-Led Acquisition
Free trials, freemium, and viral loops — how the product itself becomes your best salesperson, and the conversion math that separates funnels that work from funnels that burn signups.
Free trials that convert
A free trial lets the product sell itself: use it free for a fixed window, then pay or lose access. The standard is 14 days — long enough to reach value, short enough to create urgency. Thirty-day trials convert worse more often than not, because urgency evaporates; the user tells themselves they'll 'get to it later' and never does. The trial clock should feel short enough to act on.
The biggest trial decision: credit card upfront or not. Card-upfront trials convert to paid at much higher rates (often 2–3x), because the payment friction is already handled — but far fewer people start the trial at all. No-card trials get 3–5x more signups with lower conversion. The rule of thumb: card upfront when your traffic is qualified and your activation is strong; no card when you're still proving the product and need volume to learn from.
Trial-to-paid benchmarks: 15–25% is good for card-upfront trials; 3–8% is normal for no-card. Whatever your number, the lever is rarely the trial length — it's activation inside the trial. Users who reach the aha moment during the trial convert at multiples of those who don't. The trial doesn't sell the product; the aha moment does. Everything in the trial window exists to get the user there faster.
Typical conversion benchmarks: trial and freemium
Build brief
Trial or freemium for your product? Write which you'd pick and why. Then name the aha moment — the single action after which a user 'gets it.'
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Freemium done right
Freemium is a free tier designed to convert, not a charity tier designed to be comfortable. The free plan must deliver real value — enough that users build a habit and store their work inside your product — while drawing a clear line that growing users will cross. The classic line is usage, not features: give the full product, but limit projects, seats, storage, or volume. When the user grows, the product asks to be paid for. That's the mechanism.
The math: typical freemium-to-paid conversion is 3–5%. With 10,000 free users at 4% converting to a $25/month plan, that's $10,000 MRR — and the free base keeps compounding. Below 2%, the free tier is usually too generous (no reason to upgrade) or the upgrade path is invisible (users don't know the paid tier exists). Freemium fails most often by being too kind, not too strict.
Freemium also has a hidden cost: support, infrastructure, and attention for users who may never pay. The discipline is the free-to-paid line — review it quarterly. If power users can run their whole workflow free forever, the line is wrong. Move one high-value capability behind the paywall, or tighten the usage limit until growing teams feel it. Generosity is a strategy; unlimited generosity is a leak.
Build brief
Where is your free-to-paid line right now (or where would you draw it)? Is it drawn at usage or at features — and could your best user stay free forever?
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Viral loops and the viral coefficient
A viral loop is a cycle: a user invites others, some of those join, and they invite more. The viral coefficient (K) = invitations sent per user × invitation conversion rate. If each user sends 5 invites and 20% convert, K = 1.0 — every user brings one more, and growth compounds without marketing. Below 1.0 the loop decays; above 1.0 it grows on its own. Most products sit far below 1.0, which is fine — the loop just needs honesty about what it is.
Real virality is built into the product's normal use, not bolted on as a 'share' button nobody presses. Collaboration tools are viral because using them requires inviting teammates. Portfolio and publishing tools are viral because the output carries the brand into the world. Ask: does using my product naturally create an invitation? If not, you don't have a viral loop — you have a referral program wearing a costume.
Where loops don't exist, build the next best thing: structured referral incentives (give both sides something real — credit, months free, not swag), public output (let users publish or share what they made), and templates or embeds that travel. Measure invitations per user monthly. If it's near zero, stop calling it viral and invest the energy in trials and onboarding instead — honest strategy beats fashionable strategy.
Build brief
List three places in your product where a user could naturally invite someone else. Which is strongest — and does using your product already require inviting anyone?
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Dev's freemium app has 10,000 free users. 200 pay $20/month — a 2% conversion rate. What's his highest-leverage move?
Your turn: Map your acquisition funnel with your current (or target) conversion at each step: visitor → signup → activated → paid. Circle the step with the biggest drop-off.
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Your next 24 hours
Define your aha moment in one sentence. Then time how long it takes a brand-new user to reach it. If it's over ten minutes, that gap is your next project — Module 3 shows you how to close it.
Steal this template
THE TRIAL EMAIL SEQUENCE — five emails
Day 0 — Welcome: one action to take right now (the aha moment)
Day 2 — Value: the single most-loved feature, in 3 steps
Day 7 — Proof: one customer story with a real number
Day 12 — Urgency: trial ends in 2 days, what they lose
Day 14 — Last call: extend or upgrade, one click
Rule: one email, one job, one call to action.
Cheat sheet
- 14-day trials beat 30-day trials — urgency converts.
- Card-upfront trials: fewer signups, 15–25% conversion. No-card: more signups, 3–8%.
- The trial doesn't sell the product; the aha moment inside the trial does.
- Freemium line: limit usage, not features — growing users should feel the paywall naturally.
- Typical freemium-to-paid is 3–5%. Below 2%, the free tier is too generous or the upgrade path is invisible.
- Viral coefficient K = invites per user × invite conversion. Above 1.0 compounds; most products are far below — be honest about it.