Introduction

Every SaaS founder dreams of the same thing: building a great product, then finding their first 100 paying users.

But here’s the truth: most early-stage startups struggle with SaaS user acquisition not because their product is bad, but because they don’t know how to get SaaS customers efficiently.

You don’t need a marketing budget or complex ad funnels. You need the right user acquisition strategy for SaaS, powered by organic social media marketing and real human connection.

This blog is your step-by-step guide to acquiring your first 100 SaaS users using LinkedIn, Twitter (X), and Instagram, the three best social media platforms for SaaS startups to build trust, drive awareness, and convert followers into early adopters.

For a deeper overview of early traction frameworks, explore our How to Get Your First 100 SaaS Users: Step-by-Step Guide.

Why Social Media Matters for Early SaaS Growth

In 2025, social media isn’t just for B2C brands anymore; it’s the new SaaS customer acquisition channel. Your early users hang out online. They’re scrolling through LinkedIn, commenting on Twitter threads, and saving Instagram Reels. That’s where you meet them, not in a cold inbox, but in a relatable story or an authentic update about your journey.

Why it matters:

• Build trust fast. Founders who post consistently on social platforms see 3× higher engagement from potential customers.
• Low-cost traction. Social platforms are the best low-cost marketing channels for SaaS startups.
• Instant feedback. You can validate ideas, get feedback, and iterate quickly before scaling.

 According to 2024 data, 75% of B2B buyers research a brand on social media before making a purchase, and 53% rely on it for product education.

For a quick visual breakdown, watch How to Get Your First 100 SaaS Customers: Step-by-Step Guide (2025).

That means your next user could literally be scrolling right past your post — unless you give them a reason to stop.

Platform-by-Platform Growth Playbook

Let’s break down how to get your first 100 SaaS users using three channels: LinkedIn, Twitter (X), and Instagram.

LinkedIn Marketing for SaaS Startups

If you’re building in public, LinkedIn marketing for SaaS startups is your most powerful lever.

Why LinkedIn?

It’s where founders, professionals, and investors discover new tools daily.

Tactics that work:

• Post authentic stories about why you built your product.
• Use LinkedIn carousels to share product lessons and frameworks.
• Comment daily on posts from industry leaders to boost visibility.
• Create “behind-the-build” updates (metrics, failures, lessons).
• End posts with CTAs like: “Join our waitlist” or “Try beta for free.”

Example Template:

“We went from 0 to 100 users in 30 days by posting our journey daily on LinkedIn. Here’s exactly what worked.”

Pro Tip: Combine storytelling with light visuals (charts, milestones). People buy from humans, not logos. Learn more about turning founder storytelling into product traction in our How to Make People Care About Your SaaS Product.

Twitter (X) Marketing for SaaS Products

Twitter (X) remains the best place for founders to build an audience for their SaaS on social media.

Why Twitter (X)?

It’s conversational, real-time, and filled with SaaS founders sharing what works and what doesn't.

Action Plan:

• Share weekly “build-in-public” threads.
• Celebrate small wins (“User #27 signed up 🎉”).
• Tag micro-influencers and reply meaningfully to niche discussions.
• Use polls to gather product feedback (“What’s your biggest onboarding pain?”).
• Ask questions like “What tool do you wish existed?”

Example CTA:

“DM me ‘EARLY’ for beta access, we’re onboarding our next 25 founders this week.”

Why it works:

Founders love helping other founders. When they engage, their followers see your product too, exponential organic reach. For an inspiring example of Twitter-based SaaS growth, check out Positive Human by Relume, and this Twitter marketing breakdown video

Instagram Marketing for SaaS Companies

You might think Instagram is “too visual” for SaaS, but it’s actually a secret growth weapon.

Why Instagram?

It humanizes your brand. It’s where people connect emotionally, not just professionally.

Content Strategy:

• Post Reels showing your product in action.
• Share team culture and milestones (“Our 10th customer just joined 🎉”).
• Create carousels with mini-tutorials or use-case examples.
• Feature user testimonials (with permission).
• Use Taplink or Linktree for quick access to demos or sign-up forms.

Example CTA:

“Try the demo, link in bio.”

Explore creative storytelling examples in Why So Many AI SaaS Projects Fail and What You Can Actually Do About It.

Building the Funnel: Turning Followers into Users

Now that you’ve built visibility, let’s turn engagement into sign-ups.

How to optimize your SaaS social media funnel:

1. Add your main CTA link in all bios (same across platforms).
2. Offer incentives like “early pricing” or “founder access.”
3. Simplify your landing page (1 headline + 1 CTA + 1 benefit list).
4. Measure follower → signup → retention conversion.
5. Use tools like Notion, Google Analytics, or Fathom for tracking.

For an external deep-dive on organic funnels, read How to Get Your First 100 Customers for Your B2B SaaS Business (Medium).

Tracking, Metrics & Iteration

Your first 100 users are just the start; tracking them ensures you know what’s actually working.

Track these metrics:

• Engagement rate (LinkedIn/Twitter)
• Signup conversion (click → trial → active)
• Retention after 7 days & 30 days
• Platform-wise performance

Tools:

• Google Analytics (for UTM tracking)
• Fathom (lightweight, privacy-friendly)
• Notion dashboards or Sheets

Iterate weekly:

• If LinkedIn drives followers but few signups, → improve CTA clarity.
• If Twitter drives beta signups → double down on threads.
• If Instagram drives profile clicks → add stronger hooks in captions.

Watch this quick explainer on SaaS Metrics That Actually Matter (YouTube)

Founder Stories & Real-World Examples

Story 1: LinkedIn Growth

A solo SaaS founder shared daily posts about feature updates and customer pain points. Within 30 days, they reached their first 100 beta users purely via LinkedIn marketing for SaaS startups.

Story 2: Twitter Viral Thread

A dev-founder posted a transparent thread: “What I learned after 10 failures building SaaS.” It reached 250,000 views, resulting in 80 new sign-ups, proof that authenticity beats polish.

Story 3: Instagram Engagement

A SaaS analytics startup began sharing team behind-the-scenes Reels and user feedback highlights. It built trust, got shared widely, and generated 40 trial signups in 10 days.

For more stories of SaaS teams that scaled fast, check Beyond Labs Case Studies.

Conclusion

Your first 100 SaaS users won’t come from paid ads or agencies.
They’ll come from people who believe in your story, trust your consistency, and see themselves in your mission.

To recap your SaaS user acquisition checklist:

• Pick one platform (LinkedIn, X, or Instagram).
• Post 3× a week for 30 days.
• Add one clear CTA.
• Track weekly signups.
• Iterate ruthlessly.

Remember: You’re not just selling software, you’re building a story people want to join.

Your first 100 users will be your biggest advocates if you treat them like partners, not metrics.