Now in early access

The cofounder
you can afford.

A desktop app with a persistent AI brain that remembers your business, tracks your goals, generates websites, writes your content, and gets smarter every session. Bring your own LLM. Pay once. Own it forever.

Get Second Founder See How It Works

$49 one-time. Runs locally. No subscription required. Add your own API keys for cloud AI.

The Transformation

Drag to see the difference.

On the left, running a business alone. On the right, running it with Second Founder.

Before Doing it all yourself
edit_note
Content
10 hrs/week writing posts, emails, scripts
trending_up
Ads
Spend $1000 learning before one sale
mail
Email
Another learning curve, another bill
smart_toy
AI Tools
ChatGPT forgets you every time

You're doing 6 jobs at once.

You need a cofounder. You can't afford one.

After With Second Founder
edit_note
Content
Ideas generated, posts scheduled to 5+ platforms
trending_up
Ads
Copy from customer research, monitored daily
mail
Email
Welcome, cart recovery, nurture - all automated
psychology
AI That Knows You
Remembers everything, gets smarter every week

Your AI cofounder handles it all.

You focus on what only you can do.

chevron_left chevron_right

Drag the handle to compare

Under the Hood

Not a chatbot.
A second brain.

Most AI apps are blank slates. Second Founder has a persistent memory vault that grows with every session. Here's what's actually happening behind the scenes.

The Brain (what's stored)
## Key Numbers
| OYM price | $27 | spring sale |
| Ad budget | $75/day | CBO |
| Target CPA | $35 | kill at 3x |
## Open Items
- [ ] Film origin story VSL
- [ ] Deploy landing page
## Rules (confirmed)
R1: Never use fake scarcity
R5: Creative > campaign type
## Hypotheses (testing)
H7: "Stuck" = #1 pain word

Real data from a real user's vault. Every session reads this first.

The Output (what you get)
SF
Good morning. Here's where you stand:
Your campaign has been running for 3 days at $75/day. No sales yet — that's normal for the learning phase. Based on your $27 price point, you need 50 conversions in 7 days to exit learning. At current pace, you won't hit that.
My recommendation: switch to optimizing for ViewContent first. Your pixel needs data, and view events happen 10x more often than purchases. Once the pixel has 50+ events, switch back to Purchase optimization.
Claude Sonnet Standard

Not generic advice. Strategy built from YOUR data, YOUR pricing, YOUR ad account.

Your Goal: Hit $10K/month from my music course
Second Founder tracks every step and suggests what's next
12%
3 sales ($85 revenue) Next: Film origin story ad 8 ads running
The Difference

Generic AI vs. Second Founder.

Same question. Wildly different answers. Because Second Founder knows your business, your audience, your numbers, and your goals.

Fitness Coach Prompt: "Give me content ideas for this week"
Generic AI

1. Share a behind-the-scenes post
2. Post a motivational quote
3. Ask your audience a question
4. Share a tip related to your niche
5. Post a throwback photo

Second Founder

Your "5-min morning stretch" reel hit 62K views. Vault says Wednesdays @ 7am get 3x engagement.

1. Follow-up routine targeting the same audience
2. Myth-busting carousel on stretching (your top format)
3. Client transformation — Sarah K. just hit her 90-day mark
Music Producer Prompt: "Write me an ad for my course"
Generic AI

Ready to make professional beats? Learn beat-making from an experienced producer. Our step-by-step course covers melody, drums, mixing, and more. Perfect for beginners and intermediate producers. Enroll today and start creating!

Second Founder

Hook: "I made my first beat in 47 minutes using 4 Splice loops."

• Targets #1 pain point: overwhelm from too many tutorials
• Body uses language from Reddit threads your vault scraped
• CTA matches your current sale price
• 3 hook variations for A/B testing, formatted 9:16
Any Business Prompt: "How's my business doing?"
Generic AI

I'd be happy to help analyze your business! Could you share your recent revenue, ad spend, conversion rates, and any other KPIs? Once I have that data I can provide insights and recommendations.

Second Founder
Revenue 3 sales ($117, +40% WoW)
Ads $52 spent, ROAS 2.25x
Content Tutorial reel hit 45K views
Email Welcome sequence converting at 8.4%
Action: Double down on tutorials, pause ad set #3 (fatigued), test new hook from top comment
How It Works

From idea to revenue.
In days, not months.

1
Install in 5 minutes

Basic: Download the desktop app, one-click Ollama setup. Pro: Install the Claude plugin and connect your accounts.

2
Tell it your goal

Second Founder asks 5 questions to understand your niche, your stage, and your monetization route. Then it customizes everything for you.

3
It builds. You approve.

Content ideas, email sequences, ad copy, business strategy. Your vault stores every decision and learns your voice over time.

4
Pro: It runs. Automatically.

Auto-post to 5+ platforms, send email sequences, monitor your ads, track sales, get weekly reports. All hands-free.

Your Route

Five ways to make money.
Second Founder knows them all.

During onboarding, you pick your route. Second Founder activates the right skills, generates the right content, and recommends the right automations for your path.

videocam
Influencer

Grow audience, land brand deals, go viral

shopping_bag
Product

Sell courses, digital products, memberships

handshake
Service

Coaching, consulting, freelance clients

code
SaaS

Build apps, validate ideas, get users

explore
Discovery

Not sure yet? We'll figure it out together

What You Get

Everything a cofounder does.

AI Business Brain
+Content writing (posts, blogs, emails, ad copy)
+Business strategy and idea scoring
+Morning briefings and weekly checkups
+Monetization route guidance
+Learns your voice over time
Memory Vault

Persistent knowledge base that stores your profile, brand, decisions, customer insights, and market intelligence. Gets smarter every session. Never forgets.

Idea Engine

After a few weeks, your vault surfaces new product ideas, content angles, and revenue streams based on patterns in your data.

Pro Only
Full Automation
+Auto-post to 5+ social platforms
+Email sequences and cart abandonment
+Ad monitoring and creative pipeline
+Sales tracking and weekly reports
+Video repurposing (long to short)
Pricing

Pay once. Own it forever.

No subscriptions. No monthly fees. The app is yours. Add power-ups when you're ready.

One-Time Purchase
Second Founder

Your AI business partner. Runs locally. Gets smarter every session.

$49 one-time
Get Second Founder
check_circleAI included free — runs locally via Ollama (offline, private) or bring your own Claude/GPT-4o/Gemini key
check_circlePersistent second brain — remembers your business across sessions
check_circleGoal-driven progress bar — works backward from your destination
check_circleSmart routing — auto-picks the right model for each task
check_circleWebsite generation — build landing pages from a text prompt
check_circleAI image generation — create graphics, logos, thumbnails
check_circleContent writing, ad copy, email sequences, business strategy
check_circleIdeas engine, remix brainstorming, morning briefings
check_circleMorph — reads your vault and finds connections you're missing
check_circleLifetime updates. No expiration. Your data stays on your machine.

info Mac, Windows, or Linux. Ollama installed automatically. 16GB RAM recommended.

Everything works out of the box. These make it even better.

All free to connect. Just add an API key and you're set — no extra charges from us, ever.

★
Cloud AI Keys

Add your Claude, GPT-4o, or Gemini API key. Smart routing picks the right model per task. You pay your provider directly — typically $1-5/month.

Free to connect
⚙
Website Builder

Generate full websites from text prompts. Live preview, responsive testing, iterate in chat. Powered by Google Stitch.

Free with Google API key
✎
Image Generation

Create ad graphics, social images, logos, and thumbnails with AI. Powered by Gemini or local Stable Diffusion.

Free with Google API key

No hidden costs. The app is $49. Everything works with Ollama (free, local). If you want faster AI, add your own API key — you pay your provider directly (usually $1-5/month for typical use). We never touch your keys or charge markup. Your data never leaves your machine unless you choose to use a cloud provider.

How We Compare

They build you a website.
We build you a business.

vs. ChatGPT / Claude ($20/mo)

They forget everything. Every conversation starts from scratch. No memory, no goals, no business context. And you pay monthly forever.

vs. Jan / Msty / LM Studio (Free)

Nice chat wrappers. No business brain, no goal tracking, no progress bar, no website builder, no content engine. They're chatbots. We're a cofounder.

vs. AI Website Builders

A website isn't a business. You also need content, strategy, ads, and a memory of what works. We do all of that — and build websites too.

vs. Hiring a Cofounder

$49 once vs. $3000/mo + equity. One scales infinitely. One doesn't. And it never calls in sick.

FAQ

Common questions.

What is Second Founder? expand_more
An AI business partner that learns your business over time. It writes your content, scores your ideas, helps with ads and email, generates websites, and stores everything in a persistent memory vault. It runs on your desktop, remembers everything, and gets smarter every session. Pay once, own it forever.
Do I need to add API keys? expand_more
No. The app works right out of the box with Ollama (free, runs locally on your machine). If you want faster, smarter AI, you can optionally add your own API key for Claude, GPT-4o, or Gemini. You pay your provider directly — usually $1-5/month. Smart routing auto-picks the best model for each task so you never waste tokens. The website builder and image generation are free — they use a Google API key which costs nothing.
Do I need to be technical? expand_more
No. It's a desktop app you download and open. Ollama installs automatically. If you can use email, you can use Second Founder. Adding API keys is optional and takes about 2 minutes.
What businesses does this work for? expand_more
Courses, digital products, coaching, consulting, freelancing, content creation, SaaS, music, art. During onboarding you pick your monetization route and Second Founder customizes everything for your path.
How is this different from ChatGPT? expand_more
ChatGPT forgets you every time. Second Founder remembers everything: your brand, your audience, your numbers, your decisions. Its suggestions get better every week because it has context. It's not a chatbot. It's a system.
What's the BYOK (Bring Your Own Key) model? expand_more
You bring your own API keys from Claude, OpenAI, or Google. You pay those providers directly at their rates (typically $1-5/month for normal use). We never see your keys. We never charge markup. Smart routing automatically picks the cheapest model that can handle each task — simple questions go to fast models, strategy goes to powerful ones. This saves you 50-70% compared to using one model for everything.
Can I build websites with this? expand_more
Yes. Type something like "build me a landing page for my music course" and Second Founder generates a full website with a live preview. You can iterate ("make the hero bigger", "add a testimonial section"), test responsive views (desktop/tablet/mobile), copy the code, or download the HTML file. Requires a Google API key (free tier available).
Is there a subscription? expand_more
No. Second Founder is a one-time purchase of $49. No monthly fees, no recurring charges, no expiration. You own the app forever. The only optional costs are API keys from AI providers (Claude, OpenAI, Google) which you pay directly to those companies at their rates — typically $1-5/month. You can use the app completely free with Ollama (local AI) and never pay another cent.
Who Built This

Built by a solo founder.
For solo founders.

Sungwoo

@heysungwoo → heysungwoo.com

6.5M+ TikTok views

3M+ YouTube views

3x KCON performer

Produced for pH-1 (major label)

Music producer and entrepreneur. Built an AI agent system to run his own business — a beat-making course selling on autopilot. 5 agents, persistent vault, automated workflows.

People kept asking how he does it alone. So he productized it. Not just for musicians — for anyone building alone. Every feature exists because he actually uses it.

Your idea deserves a cofounder.

Start building today. Ship your first product this month.

Get Basic / $39 Get Pro / $29/mo

Basic: one-time purchase. Pro: cancel anytime.