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For SaaS

Trial-period emails

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A sequence that leads to first value instead of nagging about payment.

Works best in ChatGPT / Claudetrialemailonboarding

The prompt

You are an onboarding specialist. Write the trial email sequence.

Product: {what it is}
Trial length: {days}
First-value moment: {what the person must do to see the point}
Where people get stuck: {list it}
What happens at the end: {charge / lockout / downgrade}

For each email:
1. The day it goes out and the reason — an event, not "day three of the trial".
2. A subject under 45 characters.
3. Body under eight lines, one action at the end.
4. Who must not receive it: anyone who already did that action.

Required:
5. An email for those who never came back after signing up.
6. An email two days before the end: exactly what the person loses, concretely.
7. An email after it ends for those who did not pay — with no pressure.

The sequence leads to first value, not to payment: someone who never got there will not pay however often you remind them.

Anything in curly braces is yours to replace.

Example output

Day 0, right after sign-up: "Your first result in 4 minutes" — one link, one action. Day 5, only for those who never returned: "Looks like you did not get to it. What got in the way?" — a question, not a reminder… Two days out: "Your 13 saved prompts stay; access to the PRO collection closes."

Related prompts

Your idea broken down into risks plus a one-week test plan — before you spend months.

Claude / ChatGPTideavalidationmarket
You are a product strategist who has seen plenty of projects die. Assess my SaaS idea honestly, without cheering me on.

Idea: {what the service does}
For whom: {who, as narrowly as possible}
What the person does today without us: {how the job gets done now}
How I plan to charge: {model and price}
Time and money I can spend before first revenue: {resources}

Break it down:
1. The problem: does it hurt regularly, or is it a one-off inconvenience? Answer plainly.
2. Who pays: the user themselves or their manager — and why that changes the product.
3. The three main risks: why this could fail. For each — the cheapest way to test it.
4. What already exists on the market, including a spreadsheet, a notebook and "do nothing" — count those as competitors too.
5. The most dangerous assumption: the one that makes everything else pointless if it's wrong.
6. A one-week test plan: what to do on which day to get a signal without writing code.
7. The kill criterion: what result means the idea should be dropped.

If the idea is weak, say so in the first paragraph.
Show sample result

Most dangerous assumption: that the bookkeeper is allowed to change tools. The finance director decides, not them — so you sell "fewer reporting errors", not "more convenient". Kill criterion: if fewer than 3 out of 20 conversations end in "let me try it", drop the idea.

The smallest set of features you can already sell, plus what's deferred and why.

Claude / ChatGPTmvpprioritieslaunch
Help me draw the boundary of an MVP that can actually be shipped and sold.

Product: {what the service does}
The main scenario: {what the user does from login to result}
Who the user is: {description}
Time available for development: {timeframe}
Who is building it: {one developer / a team / no-code}

Do this:
1. One user path from sign-up to first value — step by step, no branches.
2. The features without which that path doesn't work. Each with a reason why it can't be dropped.
3. Features that feel mandatory but aren't needed in an MVP — and what replaces them for now (manual work, an email, a spreadsheet).
4. What to cut entirely, and why it won't stop you selling.
5. The boundaries: what the product does NOT do. Wordings for the site so nobody expects otherwise.
6. An estimate in weeks, broken down, with a note on where the estimate is least reliable.
7. What can be done by hand for the first few months instead of being automated.

Rule: if a feature can be replaced by a human at launch, it does not belong in the MVP.
Show sample result

Do it by hand: PDF export is done by support on request for the first months. Three requests a week is one hour; automating it would have cost two weeks. Boundary for the site: "We don't replace your accountant — we prepare the data for them."

A feature turned into tasks with testable criteria — including errors and empty states.

ChatGPT / Clauderequirementsticketsspec

This prompt is part of the PRO collection

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Tables, relations and indexes derived from your scenarios — plus where the schema will strain.

ChatGPT / Claudedatabaseschemaarchitecture

This prompt is part of the PRO collection

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