Where did B2B founders find their first 100 customers?
In the founder reports we checked, those selling to businesses got their first customers by contacting people one at a time: through their network, cold email, LinkedIn, partners or direct sales. Launches and Reddit posts show up far more often in the advice, but mostly for consumer and developer products.
The clearest public sample is an Ask HN thread from October 2024 asking founders for the main source of their first 100 users (about 190 comments when checked on 24 October 2026). Of its 43 top-level replies, seven say they sold to businesses or professionals. Here is what each of those seven reported:
| Who they sold to | Where the first customers came from |
|---|---|
| Publishers | First 5 to 10 from emails to friends of friends, the next 50 to 100 from cold email, then mostly word of mouth |
| US enterprise companies | Cold email, with addresses mainly from Apollo, per the founder's follow-up reply |
| Professionals ("B2P") | LinkedIn posts asking who had the problem; about 20 replied and word of mouth did the rest |
| Businesses, via partners | A worldwide network of resellers and integrators who already had the customers |
| B2B SaaS buyers | Direct sales: contacts, LinkedIn and in-person industry events |
| SaaS small businesses (under $100 a month) | Personal network for the first 20, then SEO, word of mouth and a viral loop |
| Website owners (translation) | First customer was the founder's employer, the second came from cold outreach, the first 500 users from niche SEO |
All seven started by talking to people directly. Only the two low-priced products moved to SEO to reach volume, and four of the seven say word of mouth or client advocates followed the first customers. Our post on how B2B companies got their first customers, from Lenny Rachitsky's study finds a similar start for the first ten: the founders' network and going where customers already spend time.
Why do launch and Reddit stories dominate the advice?
Because they are the most visible stories, and they come mostly from products sold to founders, developers or consumers. In the same Hacker News thread, 15 of the 43 top-level replies mention Reddit or a subreddit. The products named in them include a colour-blindness app, a breathing app, a Mac productivity app, a language-learning app and a tool for deploying React apps.
The pattern repeats elsewhere. In June 2025 a founder on Hacker News described reaching their first 100 users through Reddit and founder communities on X, and agreed with a commenter that this works well for products aimed at founders. In a December 2022 Indie Hackers thread, one founder of a landing page builder for startups reported in June 2023 100 customers within hours of a Product Hunt launch. That product was sold to startup founders. If your buyers are finance managers or operations heads, check whether they use Product Hunt at all before you plan around a launch.
Paul Graham, writing about the startups Y Combinator funds, made the case against relying on a launch in a July 2013 essay, Do Things that Don't Scale: "All you need from a launch is some initial core of users." The same essay says recruiting users by hand is the most common unscalable thing founders have to do at the start. A launch helps when your buyers gather in one place. If they don't, it is one day of traffic.
Does your price decide which channel gets you to 100?
It shapes it heavily, going by the founder reports we checked. One founder in the Hacker News thread, who runs a tool for small SaaS businesses at under $100 a month, wrote that if your deal size is less than $1,000 to $2,000 a year you should generally stop cold emailing after the first customers, because outbound sales is not economical at that price. That is one founder's rule of thumb. It fits the two low-priced products among the seven B2B replies above, which both moved to SEO.
| Your price per customer | 100 customers bring in | Channels that fit |
|---|---|---|
| $10 a month | $1,000 a month | Network for the first few, then search, communities, referrals, product loops |
| $100 a month | $10,000 a month ($120,000 a year) | Network and communities first; outbound only for early customer interviews |
| $500 a month | $50,000 a month ($600,000 a year) | Cold email, LinkedIn, partners and events, with signals to pick who to contact |
| $2,000+ a month | $200,000+ a month | Outbound and direct sales, with research on each account before you write |
The revenue column is simple multiplication. It shows why a founder charging $500 a month can spend an hour researching each prospect and still come out ahead, while a founder charging $10 a month cannot.
How long does it take to go from 10 to 100 customers?
At a good early growth rate, roughly eight months to a year. In a September 2012 essay, Startup = Growth, Graham wrote that a good growth rate during Y Combinator is 5 to 7% a week, that 10% a week is exceptional, and that 1% means you haven't figured out what you're doing. Here is how long each rate takes to turn 10 customers into 100 (our arithmetic: weeks = ln 10 / ln(1 + weekly rate)).
| Weekly growth | Weeks from 10 to 100 | About |
|---|---|---|
| 1% | 231 | 4.4 years |
| 5% | 47 | 11 months |
| 7% | 34 | 8 months |
| 10% | 24 | 6 months |
| A flat 2 new customers a week | 45 | 10 months |
The last row is the useful one for a small team. At 10 customers, adding two a week is a 20% weekly rate, and it stays ahead of 5% weekly compounding all the way to 100. Graham warns that a constant number of new customers means your growth rate is falling, which is true. Still, direct outreach is how most of the B2B founders above got going. Our guide to fitting founder-led sales into 30 minutes a day covers running that habit alongside building.
How much outreach does it take to reach 100 customers?
Hundreds to thousands of messages in the reports below, and one commenter says conversion improves with practice. Practitioners give very different numbers, so treat each as one person's report:
- In an r/SaaS thread from July 2026 on getting the first 100 customers with no budget (about 115 comments when checked on 24 October 2026), one commenter wrote: "My first paying customer took me 1200 emails and 30 demos." The same commenter says that, with practice, 10 to 20% of prospects agree to a demo and 10 to 20% of demos convert. On those rates, 100 customers would take between 2,500 and 10,000 prospects contacted (our arithmetic: 100 divided by 4% and by 1%).
- Another commenter in that thread estimated that one founder can write 30 to 40 good personal messages a day, about 1,000 a month, and that pure cold outreach gets you 5 to 10 customers in the first month. Their plan stacks network, communities, referrals and a launch on top.
- A bootstrapped B2B SaaS founder of 12+ years, answering a July 2026 Ask HN on the first 100 customers without a budget, advised manual outreach every day, to at least 50 people if possible, and asking for a conversation instead of selling.
The spread is wide because the message, the list and the price differ. Two of the three describe daily volume: 30 to 50 or more personal messages a day.
How do signals make outbound repeatable?
Signals tell you who to contact this week and give you the first line. Without them, outbound means guessing from job titles. One of the most upvoted answers in an r/SaaS thread from June 2026 asking how founders get customers from Reddit and X turns the question around, asking where people are already complaining about the problem they solve. That commenter suggests searching for people asking whether anyone knows a tool for the job, or for an alternative to a named product.
Signals worth a daily search:
- Posts asking for a tool, or asking how others handle the problem
- Complaints about a competitor, or a request for an alternative
- Job ads for the work your product automates
- Companies already using a competitor's product, found with tech-lookup sites, as the 12-year founder suggested
Our guide to finding people on Reddit asking for a tool like yours covers the Reddit searches step by step. For the tech-lookup route, see how to find companies using a competitor's software. Siela's AI SDR runs this as a daily routine: it looks for people asking how to solve the problem, comparing tools or hiring for the work you automate, and contacts up to 50 people a day on LinkedIn, 50 on X and 150 by email per Gmail mailbox, within the daily goals you set.
A 12-week plan from 10 to 100 B2B customers
Write down exactly who it is for
One sentence with the role, company type and size, and the problem. If it covers several industries, pick one.
Check your price against the channel table
Under about $100 a month, put most of your time into communities, referrals and search. Above $500 a month, outbound should carry most of the load.
Set a weekly number
Going from 10 to 100 in 12 weeks means 7.5 new customers a week. If that is far above your current pace, set the plan to 24 or 45 weeks instead, as the growth table shows.
Contact 30 to 50 people a day from signals
Personal messages only, each one opening with the post, job ad or tool that surfaced the person.
Ask every new customer for one intro
Four of the seven B2B replies in the Hacker News thread name word of mouth or client advocates as what came after the first customers.
Launch once you have proof
Post on Product Hunt or Hacker News after you have customers and quotes to show, not before.
Review the numbers every Friday: messages sent, replies, calls, new customers, and this week's growth rate against Graham's 5 to 7%.
Frequently asked questions
What channel brings most B2B startups their first 100 customers?
Direct outreach, in the founder reports we checked. In an October 2024 Ask HN thread, the seven replies that sold to businesses all started with their network, cold email, LinkedIn conversations, partners or direct sales. Two low-priced products later moved to SEO and word of mouth. Reddit and launch stories in the same thread came mostly from consumer and developer apps.
Should a B2B startup launch on Product Hunt to get customers?
Launch after you have customers and proof, unless your buyers are founders or developers who browse Product Hunt. Paul Graham's 2013 essay Do Things that Don't Scale argues that all you need from a launch is an initial core of users. For buyers such as finance or operations managers, a launch may bring only a day of traffic rather than a steady source of customers.
How fast should a startup grow from 10 to 100 customers?
Paul Graham wrote in 2012 that 5 to 7% weekly growth is good during Y Combinator and 10% is exceptional. By our arithmetic, 5% a week takes about 47 weeks to go from 10 to 100, 7% about 34 weeks and 10% about 24 weeks. Adding a flat two customers a week takes 45 weeks.
Is cold email worth it for a low-priced SaaS product?
Mostly for the first few customers. One founder in the 2024 Hacker News thread, running a tool for small businesses at under $100 a month, said outbound stops being economical when deals are below roughly $1,000 to $2,000 a year. At that price, the founder moved to SEO, word of mouth and a viral loop after the first 20 customers.
How many cold emails does it take to get 100 B2B customers?
It varies widely. One r/SaaS commenter needed 1,200 emails and 30 demos for a first paying customer, then reported 10 to 20% of prospects taking a demo and 10 to 20% of demos converting. On those rates, 100 customers would take roughly 2,500 to 10,000 prospects. Treat that as one person's experience, not a benchmark.
Sources
- Hacker News: Ask HN: Founders, what was the major sourcing channel for your first 100 users? (16 Oct 2024)
- Hacker News: Reaching my first 100 users without money or audience (3 Jun 2025)
- Hacker News: Ask HN: Should I promote my SaaS to get first 100 customers without budget (14 Jul 2026)
- Indie Hackers: How/Where did you find your first 1, 10 and 100 customer? (30 Dec 2022)
- Paul Graham: Do Things that Don't Scale (July 2013)
- Paul Graham: Startup = Growth (September 2012)
- Reddit r/SaaS: If you had $0 for marketing, how would you get your first 100 customers today? (Jul 2026)
- Reddit r/SaaS: How do SaaS startups actually get their first 100 customers from Reddit and X? (Jun 2026)