Koubou
Join Waitlist
Early Access Coming Soon • 25% Lifetime Discount

Your Digital Workshop of
Purpose-Built Tools

Tools that grow with you.

Build your personal workbench from a growing collection of specialized tools. Clean, focused, powerful — add only what you need, when you need it.

By signing up, you agree to our Privacy Policy and Terms of Service.

🎯 Lock in 25% lifetime discount • ⚡ Early access coming soon • 🛠️ Help shape the tools

Crafted with Purpose

Build your personal workbench
from specialized tools

Add only the tools you need to your clean workspace. Many tools work together seamlessly — like using your Smart Prompts library within Personas to create unique character interactions.

Smart Writer

Build it once.
Generate forever.

Chain prompts into multi-step workflows with custom fields and flexible AI settings. Use different models for each step to create sophisticated content generation.

The AI tinkerer's power tool
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Smart Writer Interface
Citation Finder Interface
Citation Finder

Instant credibility
for every claim.

Find academic sources in seconds. Perfect formatting in MLA, APA, or Chicago style with one click.

End citation headaches forever
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Humanizer

Polish formal AI text.
Keep the brilliance.

Transform formal, stiff AI text into natural, conversational writing that flows better and engages readers.

Natural flow, preserved meaning
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Humanizer Interface
Blog Post Template
Variables: Topic, Audience, Tone
Email Campaign
Variables: Product, Benefits, CTA
Social Media Post
Variables: Platform, Message, Hashtags
Smart Prompts

Your best prompts
become your best assets.

Transform your best AI prompts into reusable templates with smart variables. Build once, generate forever.

Works with Personas for unique results
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Personas

Characters that
come alive.

Create detailed character profiles you can actually chat with. From customer personas to fictional characters.

Use with Smart Prompts for unique interactions
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SJ

Sarah Johnson

Marketing Director, Tech Startup

Personality:

Data-driven, collaborative, innovative

Goals:

Increase brand awareness, improve conversion

Pain Points:

Limited budget, need to prove ROI quickly

Email Sequence: "Course Launch"

Framework: AIDA + Social Proof
1
Welcome & Quick Win
Send immediately
2
Social Proof Story
Send after 2 days
3
Objection Handler
Send after 4 days
4
Final Call to Action
Send after 7 days
Lead Flow

From download
to dollars.

Transform lead magnets into complete email sequences using proven frameworks. Strategic timing, persuasive copy.

Framework-driven conversion sequences
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Coming Soon

And this is just the beginning

Imagine dozens of purpose-built tools, all crafted with the same attention to detail, available in one beautiful workspace.

Tagline Creator

Craft effective taglines following industry best practices and proven frameworks.

Requested by early adopters

AI Debate

Put 2 AI agents against each other in a structured debate on any specified issue.

Requested by early adopters

Writing Style Analyzer

Analyze any text to create detailed descriptions of writing style and voice patterns.

Requested by early adopters

Your Idea Here

What tool would solve your biggest challenge? Join early to help shape what gets built next.

Help us build it

Built by Craftsmen, for Craftsmen

These tools above? They're direct requests from early adopters like you. Like Japanese craftsmen who perfect their tools through generations of refinement, Koubou evolves through real feedback and collaborative design with people who actually use the tools.

Your voice shapes the roadmap
Solo developer, scrappy execution
From an Early Craftsman

Tools That Evolve With Your Feedback

"
"

What makes Koubou special is how responsive it is to user feedback. I suggested a feature I needed for my research workflow on Tuesday, and by Friday, there was a working prototype. It's refreshing to use tools that genuinely evolve based on how people actually use them. The Smart Writer has completely transformed how I create content - I've never found anything this effective.

JD

James Donovan

Early Access Member & Research Specialist

What should we build next?

We're building these tools with early adopters like you. Your feedback shapes what we build next!

- Chad, Founder

Built Through Collaborative Feedback

Koubou evolves through a thoughtful balance of user feedback and expert design. Your insights help shape which tools get developed and how they function.

What makes Koubou different?

  • Purpose-built precision - Each tool is designed to solve one specific challenge exceptionally well rather than doing many things adequately
  • Expanding toolkit that grows across multiple domains - productivity, research, notes, learning, content creation, and more
  • Complete privacy where you keep control of your data by using your own API keys

Unlimited potential

The scope of what can be built within Koubou is vast. All for one simple annual subscription price, with no extra fees or upsells.

Become a Founding Craftsman

"Koubou" is Japanese for "workshop" – where master craftsmen create with purpose-built tools. As one of our first Koubou Craftsmen, you'll have direct input into which tools we build next and how they work.

You're different from the average worker. You care about quality, efficiency, and using the right tool for the job. That's why we built Koubou specifically for professionals like you.

🎯 EARLY ACCESS

Founding Craftsman

Lock in this discount for life - never pay more

$72 /year
$96 SAVE 25%

Just $6/month, billed annually

  • Every tool in one subscription - no upsells or extra charges
  • Direct access to the developer via private Discord
  • Help shape which tools get built next and how they work
  • BYOK (Bring Your Own Key): Complete privacy with your own OpenRouter API key
Join the Waiting List
🚀 Early access coming soon. Lock in your discount now.
100% satisfaction guarantee: If you're not thrilled with Koubou within 14 days, I'll refund every penny.

Frequently Asked Questions

Still have questions? I've got answers.

What exactly is Koubou?

Koubou is a collection of powerful, purpose-built tools for getting real work done. Each tool is designed to solve specific challenges across productivity, research, learning, content creation, and more. Every tool in Koubou does one thing exceptionally well instead of trying to do everything adequately.

What types of tools are included?

Currently, Koubou includes tools for writing assistance, research, content formatting, and citations. But this is just the beginning. The vision is to expand into many more domains - from productivity and knowledge management to learning, creativity, and anything else that fits within the platform. All accessible with a single subscription.

What does "bring your own API key" mean?

Some Koubou tools leverage external services like OpenRouter to deliver advanced capabilities. You'll need to create a free account with these services and enter your key in Koubou. This approach gives you complete privacy (I never see your data), unlimited AI usage with no credits or token limits to worry about, and access to hundreds of different AI models through OpenRouter. You only pay for what you use directly to the service provider.

When will I get access?

The private beta launches soon. When you join the waiting list, you'll be among the first invited. I'm admitting users in small batches to ensure everyone gets personal attention and a smooth onboarding experience.

How does the feedback process work?

As an early member, you'll join our private Discord where you can share your challenges and ideas. There's a thoughtful balance - while not every suggestion will be implemented, your feedback directly influences which tools get prioritized and how they evolve. The goal is to build what's most impactful for the community while maintaining a high standard for each tool.

What if I don't like Koubou after signing up?

I offer a simple 14-day, no-questions-asked refund policy. If you're not completely satisfied, email support@koubou.tools within 14 days of purchase for a full refund. Early testers have loved the experience, but I want you to feel confident in your decision.

How quickly do you respond to support requests?

As a solo developer focused on making great tools, I handle all support personally. During the beta phase, you'll typically receive responses within hours, not days. I'm deeply invested in making sure you succeed with Koubou.

Is there only a yearly plan?

Yes, Koubou is priced so competitively that we require an annual commitment. This allows us to offer exceptional value while maintaining the resources needed to continuously develop new tools and improve existing ones. The annual model also helps us plan long-term development and ensures we can deliver consistent value throughout the year.

What is so special about a 'toolbox' of tools?

The toolbox approach gives me complete creative freedom to build exactly what each tool needs to be. Instead of cramming everything into one complicated interface, each tool gets its own dedicated design and functionality. This means I can craft truly unique experiences without worrying about how new features will complicate the overall app. Each tool can be perfect at its specific job, rather than being a compromise.

Will the price increase in the future?

Yes. The standard price is $96/year, but early access members get a lifetime 25% discount at just $72/year. This rate is locked in forever, even as more tools are added and the regular price increases. This is my way of thanking the early supporters who help shape Koubou.

Start Your Journey

A Growing Collection of
Purpose-Built Tools

Join the Koubou waitlist to get early access to a constantly expanding toolkit designed to solve real challenges. Imagine having dozens of specialized tools available in one place, for one price.

By signing up, you agree to our Privacy Policy and Terms of Service.
25% lifetime discount
Early access soon
Help shape the tools