The first 100 users are the hardest milestone in a product's life. They require manual, high-effort distribution that does not scale — and that is exactly the point. The tactics that get you to 100 users teach you who your actual user is and why they care.
Here is what works.
1. Launch platforms
Product Hunt, Hacker News, and Indie Hackers are the highest-concentration venues for early adopters.
Product Hunt is the fastest path to 500+ visitors in 24 hours if you execute well. A top-10 finish on launch day drives real signups. Prepare 2–4 weeks in advance.
Hacker News — Show HN: Post "Show HN: I built [product] that [does thing]." Keep it factual and technical. HN users respond to honesty and specificity. A thread that stays on the front page for a few hours drives thousands of visits.
Indie Hackers: Post in the "Products" section and in relevant groups. The community is small but exceptionally high-intent — these are people actively looking for tools.
2. Short-form video
TikTok, Reels, and YouTube Shorts drive real user acquisition for SaaS products when done right. The format that works: founder-led demo videos showing a specific problem solved.
One video that hits 50,000 views can drive 200+ signups. This is not hypothetical — it happens regularly for small SaaS products that have a visually demonstrable value.
The catch: you need to make more than one video. Most products that succeed with short-form video post 5–10 videos before finding one that breaks through.
3. Direct outreach to potential users
Find 20 people who have the exact problem your product solves. You can find them in:
- Twitter threads complaining about the problem
- Reddit posts asking for help with the problem
- Communities (Slack, Discord, Facebook groups)
- LinkedIn posts about the pain
Send a short, direct message: "I saw your post about [problem]. I built something for exactly that. Would you try it and tell me what you think? It's free."
This is the most reliable tactic for the first 10–20 users, who become the foundation for everything else.
4. Relevant communities
Most niches have communities where your target users are already gathering:
- Reddit subreddits
- Facebook groups
- Slack communities (e.g., Designer Hangout, Online Geniuses, various vertical Slacks)
- Discord servers
- Forum communities (Indie Hackers, Hacker News, relevant niche forums)
The rule: be a member first, promoter second. Communities that know you exist tolerate a launch post. Communities where you appear only to promote get you banned.
5. Cross-posting and content distribution
If you write about the problem your product solves, post that content everywhere:
- Your X/Twitter feed
- LinkedIn articles
- Medium
- Dev.to (for developer tools)
- Substack (if you have one)
The goal is to appear in every place where someone searching for a solution to your problem might look.
6. Cold email (with caveats)
Cold email works when it is hyper-targeted and personal. A list of 50 people who have publicly expressed the problem your product solves, with a one-paragraph personal note, gets a 20–30% response rate.
Mass cold email to a purchased list is spam and does not work.
The personal, small-scale version is one of the most effective first-user acquisition tactics. It also gives you 50 conversations with potential users, which is more valuable than the signups.
What does not work
- Building a beautiful landing page and waiting: SEO takes months. No one discovers a new product organically.
- Posting once on each channel: Distribution requires repetition. One post is invisible.
- Paid ads before finding product-market fit: You don't know what message converts yet.
- Relying entirely on your personal network: Your friends will sign up and give you polite feedback. You need strangers who actually have the problem.
The pattern
Your first 100 users almost always come from a combination of:
- A concentrated launch event (Product Hunt, HN Show HN, or similar)
- Community posts in 2–3 relevant places
- Direct outreach to 20–50 targeted individuals
- 2–5 short-form videos
The launch event gets the first burst. The community posts and outreach fill in the gaps. The videos build slowly and compound.