Getting your first 100 users is the hardest part of building a startup. Not because the tactics are complicated, but because most founders skip the unsexy work and go straight to ads, landing pages, and SEO before they've talked to a single real customer.
This guide covers the approaches that actually produce results in the early days, with specific examples and honest trade-offs.
Why the first 100 users are different
Your first 100 users are not a scaling exercise. They are a validation exercise. You are trying to answer: does this thing work for real people?
According to a CB Insights analysis of startup failures, 35% of startups fail because there's no market need. The first 100 users tell you whether you're in that 35% before you've burned your runway.
These users will be harder to acquire than your next 10,000. They don't know you. They have no social proof to rely on. You need to earn each one manually.
The goal is not efficiency. The goal is learning.
Start with people you already know
Every founder has a network. Most don't use it because it feels awkward. Get over that.
Write a list of every person you know who could plausibly benefit from your product. Include:
- Former colleagues and managers
- People from your industry who follow you on LinkedIn
- Friends who have complained about the problem you're solving
- Classmates from university or bootcamps
Then send them a personal message. Not a mass email. A direct message that says something like:
"Hey [name], I've been building [product] for [specific person type]. I thought of you because [specific reason]. Would you try it and give me honest feedback? Takes about 10 minutes."
This works because it's targeted and direct. Paul Graham famously told early Airbnb founders to "do things that don't scale" — personally reaching out to your network is exactly that.
Target: 20-30 users from personal outreach alone.
Find online communities where your users already hang out
Your target users congregate somewhere. Reddit, Facebook groups, Slack communities, Discord servers, niche forums. Find those places before you try to reach them anywhere else.
Here's how to do it without getting banned for spam:
- Join the community and spend one week reading, not posting. Understand the culture and what they complain about.
- Answer questions with real, useful answers that have nothing to do with your product.
- When relevant — and only when relevant — mention that you built something that addresses exactly what someone asked about. Link to it.
A good example: Buffer's Leo Widrich manually posted guest content in 150+ online communities and publications in the early days. Buffer went from 0 to 100,000 users in less than a year.
One warning: do not paste the same message across multiple subreddits or groups on the same day. Moderators will ban you, and your reputation in that community is gone permanently.
Target communities to check: Reddit (search for your problem as a keyword), Product Hunt, Indie Hackers, Hacker News, relevant Facebook Groups, niche Slack workspaces.
Cold outreach done right
Cold outreach gets a bad reputation because most people do it badly. Done well, it is one of the most direct paths to early users.
The mistake most founders make is leading with their product. Flip that. Lead with the problem.
A cold email that works:
- Subject line: specific and short ("Quick question about [their exact role/problem]")
- Opening line: one sentence about them, not you
- Body: explain the problem you think they have in plain language
- Ask: one clear request — a 15-minute call or a free trial, not both
According to Woodpecker's research on cold email benchmarks, emails with personalized subject lines get 26% higher open rates than generic ones. That one stat is worth thinking about when you're tempted to send a batch-and-blast campaign.
Tools to find emails: Apollo.io, Hunter.io, LinkedIn Sales Navigator (free trial available).
Target: 50-100 outreach messages to get 10-20 responses and 5-10 users.
Get on Product Hunt and Indie Hackers
These two platforms exist specifically for early-stage products looking for their first users.
Product Hunt: A well-prepared launch can bring 500-1,000 visitors in a single day. Key preparation steps:
- Build relationships with active Product Hunt users at least 2-3 weeks before launch
- Prepare a clear tagline (under 60 characters), a demo GIF or short video, and 5+ screenshots
- Launch on a Tuesday, Wednesday, or Thursday. Mondays and Fridays underperform
- Ask your network to upvote and comment on launch day, not the week before
Indie Hackers: Post a "roast my product" or "looking for beta users" thread. The community is genuinely helpful and more likely to give useful feedback than most places on the internet.
Neither platform will guarantee 100 users on its own. But together they add a meaningful chunk, especially if your product appeals to developers, makers, or small business owners.
Direct outreach to potential users on LinkedIn and Twitter/X
If your product serves a specific professional type (e.g., HR managers, freelance designers, SaaS founders), LinkedIn is a direct line to them.
A simple process that works:
- Use LinkedIn's search filters to find people who match your ideal user (job title + company size + location)
- Send a connection request with a short note — not a sales pitch, just "I'm building something for [their role] and would love to connect with people in this space"
- After they connect, send one message asking for 15 minutes of feedback. Frame it as research, not a sale.
On Twitter/X, search for people tweeting about your problem using keywords. Reply to their tweets with a genuine response, then follow up in DMs if it makes sense.
This approach is time-intensive. Budget 1-2 hours per day for outreach. Keep a simple spreadsheet tracking who you've contacted, what you said, and their response.
Create content that attracts your target user
This one takes longer to pay off, but it compounds.
Write one piece of content per week that directly addresses the problem your product solves. Post it where your users already read — a blog, a LinkedIn article, a Reddit post, a Twitter thread.
The goal is not SEO at this stage. The goal is to be found by people actively researching the problem.
For example: if you built a tool that helps freelancers invoice clients faster, write a post titled "Why freelancers lose money on invoicing (and what to do about it)." Post it to r/freelance, LinkedIn, and your own blog. At the end, mention your product.
According to HubSpot's State of Marketing report, companies that blog get 55% more website visitors than those that don't. That stat applies to B2B SaaS companies, but the underlying logic holds for any content-driven approach: publishing something useful brings in people who are already thinking about your problem.
Focus on topics that have high intent, not high traffic. A post that gets 200 reads from exactly the right people is worth more than a viral post that brings 5,000 people who don't care.
Turn early users into a referral engine
Once you have 20-30 users, your job shifts. You need to make those users happy enough that they tell other people.
This does not require a formal referral program. At this stage, it requires:
- Personally following up with each user after their first week. Ask what's working and what isn't.
- Fixing obvious friction points fast. Speed of response signals that you care.
- Asking directly: "Do you know one or two other people who deal with this problem? I'd love an intro."
Most founders don't ask for referrals because they assume happy users will refer automatically. Some do. Most don't unless asked.
Dropbox's referral program gave both parties extra storage and drove 3,900% growth over 15 months. You don't need that level of formalization to start. A simple ask gets you further than most founders expect.
Track every referral manually in a spreadsheet until you have enough volume to justify a tool like ReferralHero or Viral Loops.
What to avoid
A few approaches waste time at this stage:
Paid ads before product-market fit: If you don't know exactly who your user is and what message resonates, you will burn money optimizing ads for the wrong audience.
Building in public without engaging: Posting your progress on Twitter is useful, but it's not a substitute for direct outreach. Passive audiences don't convert.
Waiting for press coverage: Journalists at major outlets don't cover pre-traction startups. Niche newsletters and podcasts are more realistic and often more effective.
Over-optimizing your landing page: Your landing page matters less than the quality of your product and the clarity of your value proposition. Spend your first weeks talking to users, not A/B testing button colors.
Tracking your progress
Keep a simple spreadsheet with four columns: channel, contacts reached, users acquired, quality (measured by whether they came back after the first use).
Update it every week. This tells you which channels are producing and which are wasting your time. Most founders find that 1-2 channels produce 80% of their early users. Double down on those.
The first 100 users won't come from a single campaign or a viral moment. They come from a week of outreach, a helpful Reddit comment, a well-timed Product Hunt launch, and a friend who told a colleague. Track where each one came from so you know where to put your energy next.