If you're a startup founder in 2025, you're not just building a product — you're building distribution.
And the biggest mistake most early-stage builders make? They wait too long to show up online.
You think:
- "I'll post once we have revenue."
- "I'm not good at writing."
- "No one cares what I'm doing yet."
But here's the truth:
Building in public is the new SEO.
Your online presence — especially across Twitter (X), Reddit, and LinkedIn — is what gets you discovered, builds trust, and brings in users before you ever launch.
In this blog, we'll break down:
- Why these platforms matter in 2025
- What to post on each (with real examples)
- How to show up consistently without burning out
- How Cassius AI automates most of this for you
Why Founders Need a Presence on Twitter, Reddit, and LinkedIn
Each platform plays a different role in your startup's growth loop:
🧵 Twitter/X = The Founder's Feed
This is where founders, VCs, creators, and early adopters live. It's ideal for:
- Sharing product progress
- Shipping updates
- Engaging with trends in your space
- Building a personal brand that attracts inbound
🧠 Reddit = The Smartest Place to Find Real Customers
Reddit is where users ask raw, unfiltered questions. It's perfect for:
- Dropping value in niche subreddits
- Answering questions your product solves
- Seeding product discussions
- Driving signups quietly (without spamming)
💼 LinkedIn = The Professional Amplifier
This is where you build credibility and attract:
- Press
- Partnership deals
- Investors
- Early enterprise users
When used right, these platforms compound your credibility. But they each require different types of posts — and different styles of engagement.
What to Post on Twitter as a Founder (2025 Edition)
Twitter (X) is still the fastest place to build founder visibility. But it's noisy — so your content needs to be scroll-stopping, helpful, or human.
🧵 1. Threads
Write multi-part breakdowns of:
- Things you're learning
- Launch results
- Customer feedback
- Tiny experiments
Example:
🧵 We changed one word in our onboarding flow and activation jumped 28%. Here's the breakdown:
These get bookmarked, quoted, and often ranked by AI search tools like Perplexity and ChatGPT.
💭 2. One-liners or insights
Most products fail because the founder doesn't have distribution leverage.
You don't need a better tool. You need a louder signal.
These boost engagement and build familiarity.
🖼️ 3. Screenshots or progress visuals
Just shipped V2 of our dashboard — cleaner, faster, and finally mobile-friendly. Feedback welcome👇
People love behind-the-scenes product visuals.
💬 4. Replies to influencers or niche posts
Find threads in your space and reply with something genuinely helpful — this draws attention back to your profile organically.
What to Post on Reddit as a Founder (Without Getting Banned)
Reddit punishes spam — but rewards relevance. The goal is to blend in, deliver value, and build trust.
🔍 1. Help-first comments on high-traffic threads
Example:
r/SaaS: "What tools do you use to automate marketing as a solo founder?"
You reply:
"I'm testing a co-pilot called Cassius that uses AI agents for Reddit replies, influencer DMs, and SEO blog posts. Too early to say if it's 'the one' — but interesting so far."
You didn't push. You shared a real experience. That's what works.
🧵 2. Thoughtful, standalone posts
Great format:
- Share a founder mistake
- A lesson learned
- A breakdown of your workflow
- A transparent launch debrief
Title Example:
We launched on Product Hunt with zero audience. Here's how we ranked #4 and got 800 users.
Then drop a detailed story with insights, and only mention your tool near the end, naturally.
🤝 3. Engage in non-promo ways too
- Comment on unrelated subreddits (fitness, books, hobbies)
- Ask questions
- Share memes or helpful advice
This gives your account a natural post history — so your product posts don't get flagged.
What to Post on LinkedIn as a Founder
LinkedIn has evolved in 2025. It's not just recruiters and job updates anymore — it's where professional builders share traction, get coverage, and drive serious inbound.
💬 1. Personal reflections with business context
I was scared to launch. I thought I needed everything perfect. But we shipped with bugs, missing docs — and got 78 signups on Day 1.
Here's why starting imperfect was the best decision we made.
These posts often go viral because they mix vulnerability with value.
📊 2. Transparent metrics & results
Month 2 of building Cassius AI:
• 1,500 users
• 4 live agents
• 1 viral Reddit post
• 0 paid ads
Here's what worked👇
Founders, operators, and investors love numbers.
🧠 3. Frameworks, processes, or playbooks
Share your internal operating system.
Here's how we test 10 marketing ideas per week with zero team (using AI agents):
[insert post]
You'll get shares, saves, and DM inquiries.
How to Stay Consistent Without Getting Burnt Out
Content compounds — but only if you stick with it. The problem? Most founders don't know what to say, or run out of steam.
Here's a repeatable strategy:
| Day | Platform | Content Type |
|---|---|---|
| ✅ Monday | X (Twitter) | A lesson or thread |
| ✅ Wednesday | Comment on a few threads in your niche | |
| ✅ Friday | Reflect with a weekly recap or insight |
Even this light schedule will build traction over time. But if you want to go faster without writing everything manually…
Use Cassius AI to Post Across All Three Channels Automatically
Cassius is the AI-powered growth co-pilot for founders — built to turn your product updates, lessons, and ideas into fully-formed content across Twitter, Reddit, and LinkedIn.
Here's how it helps:
| Agent | What It Does |
|---|---|
| 🧵 Twitter Agent | Turn bullet points or voice notes into engaging threads, suggest hooks based on trending formats, auto-schedule based on engagement data |
| 🔍 Reddit Agent | Finds relevant threads, writes human, non-spammy replies, posts on your behalf with natural timing |
| 💼 LinkedIn Agent | Formats your wins, metrics, and insights into viral-style posts, adds light storytelling and CTAs, engages with similar creators |
You don't need to "be a content person" — you just need to keep building, and let Cassius do the rest.
TL;DR — Post Where Your Future Customers Are Hanging Out
If you're a founder in 2025, you can't afford to be invisible.
You don't need to go viral every day. You just need to show up — consistently, honestly, and helpfully.
Twitter builds your voice.
Reddit builds your trust.
LinkedIn builds your authority.
And Cassius helps you do all three — automatically.
▶️ Try the Cassius AI agents now at getcassius.ai
Let your product do the building — let your posts do the compounding.