How I'd grow a SaaS from zero today

If a founder handed me a brand new B2B SaaS today and asked me to grow it, I wouldn't open Google Ads on day one. I wouldn't hire an SEO agency. I wouldn't post on LinkedIn 5 times a day hoping something sticks. I've seen that movie play out enough times to know how it ends — a few thousand dollars gone, a couple of unqualified signups, and a founder who's now convinced "marketing doesn't work for us."

Here's what I'd actually do, in order, over the first 90 days. It's not glamorous, and most of it doesn't feel like "marketing" in the LinkedIn-influencer sense. But it's the version that actually works.

Days 1–14: Talk to people, not tools

Before any marketing happens, I'd spend two weeks talking to 15–20 people who fit the customer profile. Not surveys. Actual conversations — 25 to 40 minutes each, on Zoom, with the camera on. The goal is to find the exact words they use to describe the problem, what they've tried before, and what made them give up.

Most founders skip this step because it feels slow. It's not slow. It's the only way to write copy that doesn't sound like every other SaaS site. Every great landing page I've ever written started as a sentence somebody said to me on a call.

A few questions I always ask in these calls:

• Walk me through the last time you ran into this problem — what were you actually doing?
• What did you try first to solve it, and why didn't that work?
• If you had a magic wand, what would the ideal solution look like?
• Who else on your team is affected by this?
• What would have to be true for you to pay for a tool that fixed this?

The answers to these become your headline, your subheadline, your features list, your objection-handling section, and the angle of your first ad. You're not doing "customer research." You're collecting the raw material for everything else.

Days 15–30: Sharpen the positioning

Pick one type of customer. One. Not "SMBs and enterprises." Not "marketers and sales teams." One. Then rewrite the landing page so that person feels like the product was built for them — because at this stage, it should be.

I know this sounds obvious. It isn't. I'd say 80% of early-stage SaaS sites I audit are trying to talk to three different audiences on the same page. The result is a page that no one feels strongly about. A narrow page that excludes most visitors is the right page. Conversion rates almost always go up when you scare away the wrong people early.

• Who is this for (be specific about size, role and stage)
• What problem are they trying to solve right now
• What does life look like after the product works for them
• Why this product, instead of the workaround they're using today

Write the page in plain English. Read it out loud. If any sentence sounds like something a marketing person would say but a normal human wouldn't, rewrite it. Replace every "streamline," "empower," and "unlock" with the literal thing that happens.

Days 31–60: Pick one channel and go deep

This is where most founders go wrong. They try LinkedIn ads, Google ads, SEO, cold email, podcasts, partnerships and Reddit all in the same month. They get a little bit of nothing everywhere, can't tell what's working, and quit two weeks before any of it would have paid off.

Pick the one channel where your customer already spends time. If they live in their inbox, run cold email. If they Google specific problems, build a few sharp SEO pages. If they hang out on LinkedIn, post and run targeted ads there. Go all-in on one for 30 days.

How to pick the channel: look back at those 20 customer calls. Where did they say they found the last tool they bought? Where do they hang out when they have this problem? That's your channel. Not the one that's trendy. Not the one your competitor is bragging about. The one your customer is already on.

What "go deep" actually means

Going deep on a channel means doing the unsexy reps. For SEO, it's writing 10 pages that solve real searched problems and linking them properly — not publishing one "ultimate guide" and hoping. For cold email, it's building three tight 500-person lists and writing different angles for each — not blasting 50,000. For LinkedIn, it's posting 4 times a week for a month with a clear point of view — not posting once and checking the likes.

30 days of focused work on one channel will teach you more than 90 days of spreading thin across five.

Days 61–90: Double down on what works

By now you should have data. Some signups are coming from somewhere. A specific page is ranking. A specific ad is converting. A specific cold email angle is getting replies.

Take the one thing that's working and multiply it. More pages like the one that ranked. More variations of the ad that converted. More volume on the cold email angle that's getting replies. This is the part where momentum starts to feel real.

Resist the urge to add a second channel here. The instinct is, "Cold email is working, let's also turn on Google Ads." Don't. You haven't even hit the ceiling of the first channel yet. Channels usually have one or two orders of magnitude of growth in them before they tap out. Drain that well first.

Early SaaS growth isn't about having ten channels. It's about having one channel that works, repeated until it stops working.

The numbers I'd actually track

Most early-stage dashboards I see have 40 metrics on them. You don't need 40. In the first 90 days, I'd track exactly five:

• Qualified signups per week (not total signups — the ones that match your ICP)
• Activation rate (of those signups, how many actually used the product)
• Cost per qualified signup (be honest about the time, not just the ad spend)
• Reply or engagement rate on whatever channel you picked
• One leading indicator from the product (a key action that predicts retention)

Five numbers, reviewed every Monday morning, written down somewhere you can see the trend over weeks. That's a marketing dashboard. The other 35 metrics are noise until you have product-market fit.

What I wouldn't do

• Spend money on ads before the landing page converts organic traffic
• Hire an SEO agency before the positioning is clear
• Build a complicated marketing automation setup for 5 leads a week
• Worry about "brand" before there are real customers using the product
• Run a podcast, a newsletter, a YouTube channel and a Twitter strategy all at once
• Hire a content writer before you can clearly explain what to write about

The mindset that actually matters

Early SaaS marketing is a discipline problem more than a creativity problem. The hard part isn't coming up with new ideas — there are infinite ideas. The hard part is saying no to 9 out of 10 of them so you can actually finish the one you started.

Every successful early-stage SaaS I've worked with had the same boring pattern underneath the surface: a clear customer, a clear page, one channel, and a founder who refused to get distracted for 90 straight days. That's it. That's the playbook.

Growth in the first 90 days isn't glamorous. It's a few sharp conversations, a clear page, one channel run honestly, and the discipline to ignore everything else. Do that, and at the end of three months you'll have something most founders never get: a marketing engine you actually understand.