9. Assumptions and Open Inputs
This idea came from the 30 Sept 2026 micro-SaaS idea catalog (C3). No founder brief was supplied. There's no stated team, hours per week available, price, geography or traction. Here's what I assumed, and how the verdict changes if each assumption is wrong.
9.1 Assumptions made
| Input | Assumption used | If actually different… |
|---|---|---|
| Source tool | Airtable, chosen from a 14-source scan (02) | If you have deep access to another tool's users (you're a ClickUp consultant, say), that tool's odds can beat Airtable's despite the incumbent. |
| Hours per week available | Two columns: ~15 hrs/week, and full-time | Under 10 hrs/week: multiply the ~15 hrs/week odds by ~0.6. Reliability and videos are what slip. |
| Skills | You can build a Node/TypeScript backend with OAuth and queues | If you'd hire the build, add ~$8–15k and a quarter's delay. The odds drop by about a third. |
| Price | $19 / $39 / $79, blended ~$32 | At Sync2Sheets' ~$22 blended, every "customers needed" figure rises ~45%. |
| Churn | 5–7% a month | Above 8%, the $5k level needs more trials than Airtable search likely gives. |
| Install-to-paid | ~0.2% cumulative (Sync2Sheets, including its free years), better with a trial-only funnel | This is the least certain number in the model. Measure it by day 90. |
| Geography | Global listing, USD pricing, mostly English-speaking buyers | Doesn't change the product. Paddle handles tax. |
| Stage | Idea. No code, no users. | Any existing Airtable client base or audience changes the day-30 checkpoint entirely. |
| Funding | None, and none needed | Doesn't change the plan. |
9.2 Inputs that would change the verdict most (please supply)
- Hours per week available, and for how many months.
- Can you build and run the sync backend yourself? Which stack?
- Access to Airtable users: consultants, teams, communities you're already in, or an existing audience.
- Any existing product, audience or channel (a YouTube channel, newsletter or community role) that could bring the first 30 trials.
- Your "good outcome" number: $3k, $5k or $10k MRR. The ladder says these are very different bets.
- Appetite to sell the business at month 24–36, or to run it long term.
9.3 Definitions used throughout
- MRR: monthly recurring subscription revenue, with annual plans divided by 12.
- Paying customer: one paying subscription (usually one team or one Google account).
- Churn: monthly logo churn among paying customers.
- Install: a Marketplace install count, which is cumulative and includes free and domain installs.
- Tier A / Tier B: see 01.
- Plateau MRR: new payers a month × ARPU ÷ monthly churn.