The first 100 is the hardest stretch. You don't have social proof, search rankings, or word-of-mouth yet. The good news: you don't need ads. You need 100 specific people, and you can reach them one by one.
Channel mix that actually works at zero
- Cold-DM your ICP, one at a time. Twitter, LinkedIn, even email. Use the cold-outreach-email skill. Realistic conversion: 10-20% reply, 5-10% try the product. That means 100 DMs → 10 trials → maybe 3 keeps.
- Post in 2-3 niche communities.Not the big subreddits. The 10K-subscriber ones where the rules are friendly. Tell a story, not an ad: "I built X because I kept running into Y. Here's what I learned. Demo: link."
- Hacker News "Show HN". Even 10 upvotes gets you ~50 users. Title formula:
Show HN: ProductName — one-sentence what it does. First comment: who it's for, why you built it. - Indie Hackers + r/SideProject.Saturday Showcase threads are low-friction. Won't blow up but reliably brings 5-20 curious people per post.
- Personal network.The friends-and-family launch is cringe but it works. They're your first 20.
The math, honestly
100 users in 30 days = 3-4 per day. That's doable through manual outreach alone. Aim for 100 DMs per week + 2 community posts per week + 1 podcast appearance / interview if you can swing it. Repeat.
What to avoid
- Buying ads.You don't know who converts yet. Ads burn money learning what manual outreach teaches you for free.
- SEO blog posts. Takes too long. Do them later.
- Generic mass DMs. Personalize the first sentence (their tweet, project, bio). Generic DMs get reported.
- Caring about follower count. 100 paying users with 50 followers beats 10K followers and 0 paying users every time.