Market Validation for SaaS: Customer Interviews, Competitive Analysis & Market Sizing

Customer Interview Techniques

The single most important validation activity is talking to potential customers. But most founders do it wrong — they pitch their idea and ask "would you use this?" That question is worthless because people are polite.

The Mom Test

Rob Fitzpatrick's rules:

1. Talk about their life, not your idea.
2. Ask about specifics in the past, not generics about the future.
3. Talk less, listen more.

Great Questions to Ask

• "What's the hardest part about [doing the thing]?"
• "How do you currently solve this problem?"
• "What have you tried that didn't work?"
• "How much time/money do you spend on this today?"
• "If you had a magic wand, what would the perfect solution look like?"

Competitive Analysis Framework

Many first-time founders panic when they find competitors. Don't. Competition is validation.

What to Research:

• Pricing/packaging
• Customer reviews (G2, Capterra)
• Features vs gaps
• Positioning
• How long they've been around

Where to Find Your Edge:

• Underserved niches
• Simpler UX
• Better pricing
• Integrations
• Faster onboarding

The goal is not to build a "better" version — it's to build a different version for a specific segment.

Landing Page Testing

Create a page describing your product, drive traffic, measure signups.

Your landing page needs:

• Clear headline
• Subheadline
• 3-4 benefits
• Social proof
• Email signup form
• Simple design

Aim for 5-10% conversion. Below 3% = messaging needs work. Above 15% = you're onto something.

Pricing Validation

The Van Westendorp Method — ask 4 questions:

1. At what price would it be too cheap (you'd question quality)?
2. At what price would it be a bargain?
3. At what price would it be getting expensive?
4. At what price would it be too expensive?

The sweet spot falls between "bargain" and "getting expensive."

Market Sizing: TAM, SAM, SOM

• TAM (Total Addressable Market) = everyone who could theoretically use it.
• SAM (Serviceable Addressable Market) = the segment you can actually reach.
• SOM (Serviceable Obtainable Market) = realistic share in 1-2 years.

Always size bottom-up, not top-down.

The Validation Checklist

1. Talked to 10+ potential customers using Mom Test principles.
2. Identified a specific painful problem.
3. Researched 3+ competitors and found unique angle.
4. Created landing page and measured interest.
5. Validated willingness to pay.
6. Estimated SOM using bottom-up sizing.