1. Why Finding Interviewees Feels Difficult
Most early-stage founders fail at customer discovery not because their questions are bad, but because they give up after sending 10 awkward LinkedIn messages with zero replies.
People are busy, defensive against unsolicited sales pitches, and skeptical of vague meeting invitations. However, people love talking about their expertise, their daily frustrations, and the obstacles preventing them from doing great work. If you position your request as an academic or industry research inquiry rather than a disguised sales pitch, your response rates will soar from 3% to 25%+.
To understand the total number of calls you should aim for, see How Many Customer Interviews Do You Need Before Building an MVP? and How to Know If People Actually Want Your Product.
2. The Top 5 Customer Sourcing Channels
1. LinkedIn Sales Navigator (Highest ROI for B2B)
Filter by exact job title, company headcount (e.g. 11–50 employees), geography, and industry. Look for people who have been in their role for at least 1 year, as they have experienced operational friction firsthand.
2. Niche Slack & Discord Communities
Join specialized industry communities (e.g. RevOps Slack groups, Product Managers Discord servers, indie maker forums). Never spam the main channel. Message active members privately or post a transparent request in the #feedback channel.
3. Reddit & Specialist Forum Lurking
Search subreddits related to your domain (e.g. r/accounting, r/logistics, r/ecommerce). Identify users who wrote detailed posts complaining about their current software tools and message them directly.
4. Second-Degree Personal Network Introductions
Post on your personal LinkedIn: "We are doing research on inventory reconciliation challenges for mid-sized apparel brands. Who is the smartest e-commerce ops director in your network?"
5. Competitor Review Section Sourcing
Look at 2-star and 3-star reviews of existing competitors on G2 and Capterra. Find the reviewers on LinkedIn and reach out to discuss their specific complaints.
3. Battle-Tested Cold Outreach Templates
Template 1: The "Peer Research" LinkedIn Message (B2B)
"Hi [First Name], noticed your work leading [Function] at [Company]. I’m conducting an industry research study on how mid-market teams handle [Specific Headache, e.g. reconciling multi-channel inventory discrepancies].
I am not selling anything—strictly compiling qualitative benchmarks on where existing tools fall short. Would you be open to a quick 15-minute conversation this Thursday or Friday? Happy to share our finalized research report with you."
Template 2: The "Community Member" Message (Slack / Discord)
4. The "Snowball" Referral Multiplier
At the conclusion of every successful interview, ask this crucial closing question:
"Who are 1 or 2 other operators in your network who deal with this exact headache every week? Would you feel comfortable making a quick email introduction?"
If you conduct 10 strong interviews and each person introduces you to 1.5 colleagues, you will book 15 additional high-trust discovery calls without sending a single cold message.
5. Sourcing Mistakes That Ruin Response Rates
| Mistake | Why It Fails | Correct Approach |
|---|---|---|
| Pitching Your Solution Early | Triggers sales defenses; prospect declines | Frame outreach entirely around learning about their problem |
| Asking for 60 Minutes | Too high a time commitment for busy professionals | Ask for a strict 15-minute conversation |
| Vague Personas | "Anyone in marketing" yields zero relevance | Target "B2B SaaS Growth Leads at 20–100 person companies" |
6. Sourcing Domain Cohorts via ProdNet
If you are building in a high-friction niche (e.g. healthcare administrators, specialized cloud architects, or B2B enterprise buyers), recruiting qualified discovery candidates manually can take weeks.
ProdNet’s research desk mobilizes vetted domain contributors and target buyer panels on demand. We recruit, schedule, and synthesize customer discovery cohorts so you get verified market feedback in 7 days.