The fastest way to turn a business idea into a testable plan.
Build your Lean Canvas —
in 5 minutes flat
Describe your idea in your own words, in any language. LEANSpark asks the right questions, fills out your canvas, and tells you what to test first.
No credit card required.
From the creator of Lean Canvas — used by 1M+ entrepreneurs worldwide.
On your own
- Google “how to fill out lean canvas”
- Guess what goes in each box
- No idea if your assumptions are right
The AI-powered way
- Tell the AI your idea in your own words, any language
- It asks clarifying questions and builds your canvas
- It stress-tests each box and tells you what to validate first
Your canvas is step one
A canvas is a set of guesses. LEANSpark checks which ones your idea rests on, then helps you test them, one job at a time.
-
Start here Free
Know where you stand
A full stress test of your idea, all 7 tests, with a report and the first fix for each.
- LEANSpark
- Does the checking.
- You
- Tell it about your idea.
-
Step 1 Starter · $25/month
Find out if your idea is worth pursuing
Know if it’s worth pursuing, and what to fix, within about 2 weeks.
- LEANSpark
- Runs the test and drafts the fixes.
- You
- Decide what to change.
-
Step 2 Pro · $50/month
Land your first paying customers
Find out if they’ll pre-order or sign an LOI.
- LEANSpark
- Drafts your interview plan and analyses every interview you bring.
- You
- Have the conversations.
-
Step 3 Power · $100/month
Grow it into a real business
Find and fix what is holding back growth.
- LEANSpark
- Reads your numbers, proposes each experiment and tracks the results.
- You
- Run the business.
Every step runs the same proven loop: plan, test, check, decide. Built on Lean Canvas and Running Lean.
Your canvas, and an honest check of what to fix first, free. Then find out if your idea is worth pursuing.
Start your canvas →Free — under 5 minutes.
What is a Lean Canvas?
Lean Canvas is a 1-page business model template created by Ash Maurya in 2010. It adapts Alexander Osterwalder's Business Model Canvas for startups operating under conditions of extreme uncertainty.
While the original Business Model Canvas maps an existing business holistically, Lean Canvas focuses on what matters most at the early stage: identifying and testing your riskiest assumptions before you build.
The 12 blocks of a Lean Canvas
- Customer Segments — Who has the problem and who will pay
- Problem — The top 3 problems your customers face
- Existing Alternatives — How customers solve these problems today
- Unique Value Proposition — The single, clear message that turns a visitor into a customer
- Solution — Your top 3 features that address the top problems
- Key Metrics — The numbers that tell you how your business is doing
- Channels — How you reach your customers
- Early Adopters — The specific subset of customers you target first
- Cost Structure — Your fixed and variable costs
- Revenue Streams — How you make money
- Unfair Advantage — What can't be easily copied or bought
- High-Level Concept — The X for Y analogy that makes your idea instantly understandable
Why Lean Canvas instead of Business Model Canvas?
Lean Canvas replaces four boxes from the original BMC — Key Partners, Key Activities, Key Resources, and Customer Relationships — with startup-specific ones: Problem, Solution, Key Metrics, and Unfair Advantage.
These substitutions matter. Early-stage ventures need to understand their problem deeply before worrying about key partners. They need to define metrics before cataloging resources. Lean Canvas captures what's most uncertain — and most risky.
For a detailed comparison, see Lean Canvas vs Business Model Canvas.
Who uses Lean Canvas?
Over a million entrepreneurs, accelerators, and universities worldwide use Lean Canvas. It's a core component of the Running Lean methodology. Organizations like MassChallenge, Techstars, and hundreds of university programs use it to coach founders through early-stage validation.
Lean Canvas + AI
LEANSpark brings the Lean Canvas to life with AI. Instead of staring at nine empty boxes, you describe your idea in your own words, in any language. The AI builds your canvas, then stress-tests it across 7 dimensions — Clarity, Desirability, Viability, Feasibility, Defensibility, Mission, and Timing — and tells you which assumptions to validate first.
It's the only AI startup tool built by the person who invented the methodology.