Skip to main content
IIdeaPlan
Founder's First Product0 of 9 chapters
0% complete
Chapter 1 of 925 min

Idea Validation

Test Your Idea Before You Build

Idea Validation

Most SaaS products fail because nobody wants them. Not because the code is bad. Not because the marketing is weak. But because the founder built something without validating demand first.

The Validation Paradox

You cannot validate an idea by asking people if they would buy it. Everyone says yes. You need evidence of real intent: money, time, or competitive behavior.

The validation hierarchy, from weakest to strongest:

  1. "I would buy this" (worthless)
  2. "Here's my email" (mild interest)
  3. "I currently pay for X" (validated problem)
  4. "I built a hacky workaround" (desperate pain)
  5. "Here's $100 for early access" (real intent)

Skip the first two. Start at level 3.

Three Validation Methods

Method 1: The Mom Test

Ask questions about their life, not your idea. Bad question: "Would you use a tool that automates your invoices?" Good question: "Walk me through how you handle invoicing today."

Look for pain, not politeness. If they don't complain unprompted, the problem is not urgent.

Method 2: The Landing Page Test

Build a one-page site describing your product. Drive 100-500 targeted visitors (Reddit, LinkedIn, niche forums). Track email signups and "pre-order" clicks (even if no payment is collected yet).

Conversion benchmarks:

  • 1-3% email signup: weak signal
  • 5-10% email signup: moderate interest
  • 10%+ email signup or 1%+ pre-order intent: strong signal

Method 3: The Competitor Revenue Test

Find 3-5 competitors or adjacent products solving a similar problem. Check their pricing pages, G2 reviews, LinkedIn employee count, funding (Crunchbase), traffic (SimilarWeb). If competitors exist and are growing, demand is validated. Your job is differentiation, not demand creation.

Red Flags to Abandon

Stop immediately if:

  • You cannot find paying customers for similar products (no competitors is usually bad, not good)
  • People say "cool idea" but won't give you their email
  • You have to explain the problem for more than 30 seconds
  • The TAM is under $10M (too small to scale)
  • Existing solutions are free and good enough

Green Flags to Continue

Keep building if:

  • 3+ people in 10 interviews mention the problem unprompted
  • Competitors have raised funding or are profitable
  • People currently pay for a partial solution or workaround
  • You find active communities complaining about the problem
  • Someone offers to pay before you even ask

Validation is not a one-time event. It is continuous. The best founders talk to users every week, forever.

TAM Calculator

tool20 min• Required

Calculate the TAM for your SaaS idea. Define your target market, average revenue per customer, and market size. Aim for a TAM of at least $10M.

Finished this chapter?