What is the Lean Canvas?

A one-page business model layout of nine blocks, created by Ash Maurya and adapted from the Business Model Canvas under a Creative Commons BY-SA 3.0 licence. It replaces four blocks of the original — key partners, key activities, key resources and customer relationships — with problem, solution, key metrics and unfair advantage. The swap exists because a business that does not exist yet cannot answer operational questions honestly, while the risk it actually faces is whether the problem is real.

What is the difference between the Lean Canvas and the Business Model Canvas?

Four blocks differ. The Business Model Canvas asks about key partners, key activities, key resources and customer relationships, which describe how an operating business delivers value. The Lean Canvas replaces them with problem, solution, key metrics and unfair advantage, which describe whether a business should exist at all. Use the Lean Canvas before product-market fit and the Business Model Canvas after it — the first is about risk, the second is about operations.

Is this Lean Canvas template free, and is anything uploaded?

It is free and opens directly in the page — no account, no sign-up, and nothing uploaded, because the app runs entirely in your browser. You can verify that by disconnecting from the internet before filling it in. The demo lets you edit everything; what it holds back is taking the work out again — PNG, PDF and Markdown exports, saving a file to disk, and automatic backup — which come with a free account — $0 forever, no card.

The Lean Canvas

Q: In what order should you fill in the Lean Canvas?

Problem and customer segments first, together, because a problem only means something for a named person. Then unique value proposition, then solution — deliberately after the promise, so features are answers rather than starting points. Then channels, revenue and costs, and unfair advantage last, since it is usually the only block you cannot answer on day one and pretending otherwise wastes the exercise.

Nine blocks for a business that does not exist yet. Below: what each block really asks and how it gets filled in badly, a worked example filled end to end, and the canvas itself — editable right here, no account, nothing uploaded. Plus the question most guides dodge, which is when this is the wrong canvas.

Open the canvas → Read the nine blocks

Opens the real app with the canvas already laid out. No sign-up, no upload, no install.

What it is, and why four blocks changed

The Lean Canvas was created by Ash Maurya as an adaptation of the Business Model Canvas. It keeps the one-page format and five of the original blocks, and replaces four of them: key partners, key activities, key resources and customer relationships give way to problem, solution, key metrics and unfair advantage.

That swap is the entire point, and it is worth understanding rather than memorising. The four blocks it removes describe how an operating business delivers value — they assume there is something to deliver and someone already buying it. A company that has not launched cannot answer them honestly. It can only guess, and a canvas full of confident guesses about logistics is worse than an empty one, because it looks finished.

The four blocks it adds describe whether the business should exist. That is the risk a new venture actually carries: not "can we run this" but "is this problem real, for someone specific, and can we reach them". Read that way, the Lean Canvas is not a simplified Business Model Canvas — it is a risk register wearing the same layout.

The nine blocks, and the trap in each

These are the nine prompts exactly as they appear in the canvas that opens below. Each gets the question it really asks, and the specific way it gets filled in badly.

1. Problem

"The top three, ranked. Plus: what do they use today instead? 'Nothing' is an answer, and a hard one."

The trap: writing the absence of your product as the problem. "They don't have a dashboard" is not a problem; "they find out about churn a month late" is. The second half of the prompt is the sharp one — if today's alternative is genuinely nothing, you are not competing with a tool, you are competing with indifference, which is far harder and needs to be known on day one.

2. Customer segments

"Who exactly, and which ones are the early adopters — the impatient minority."

The trap: naming the eventual market instead of the first ten customers. The early-adopter half is what makes this block useful: you are looking for the minority already hacking together a workaround, because they will forgive a rough product. A segment with no impatient minority inside it has no entry point.

3. Unique value proposition

"Why you and not the other one — in a single sentence a customer would say out loud."

The trap: a sentence only a founder would say. "AI-powered workflow orchestration" fails the read-aloud test. The constraint is not brevity, it is voice — if your customer would not phrase it that way to a colleague, it is positioning you wrote for yourself.

4. Solution

"One line per problem above. If a line matches no problem, cut the feature."

The trap: filling this block first. It sits fourth on purpose — most people arrive with the solution and reverse-engineer a problem to justify it. The second sentence is a rule with teeth: a feature matching no listed problem is not a bonus, it is scope you are paying for. This is the block where the canvas is most likely to tell you something you did not want to hear.

5. Channels

"How you reach them — one path you can repeat, not five you tried once."

The trap: listing every channel that exists. Five channels tried once is a list of experiments, not a channel strategy. One repeatable path is worth more than five plausible ones, and writing only one forces the honesty.

6. Revenue streams

"What they pay, when, and how often it repeats."

The trap: "freemium" or "subscription" as an answer. Those are shapes, not streams. The three parts — what, when, how often — are three separate facts, and the third is the one that decides whether you are building an asset or a treadmill.

7. Cost structure

"What it costs to run for a year, and what it costs to acquire one customer."

The trap: answering only the first half. Cost per acquired customer is the number that sits directly against revenue, and leaving it blank is how a canvas can look complete while hiding the only arithmetic that matters.

8. Key metrics

"The one number that tells you it is working. Not signups."

The trap: the prompt names it, and people write it anyway. Signups measure your marketing, not your product. The useful metric is usually the first moment a user gets the value you promised — and if you cannot name that moment, that gap is the finding.

9. Unfair advantage

"What cannot be copied or bought. If you can name it easily, it probably can."

The trap: writing "our team" or "first mover". Both can be bought or overtaken. This is the block most people cannot honestly fill on day one, and leaving it empty is a legitimate answer — an empty box you revisit in six months is worth more than a comfortable sentence that stops you looking.

A worked example, filled in end to end

Here is one filled for a pre-launch B2B idea — a scheduling tool for independent physiotherapy practices — at the level of specificity the blocks ask for.

Problem

1. Last-minute cancellations leave paid hours empty. 2. Rebooking happens by phone, between patients. 3. No-shows are only noticed at the end of the month. Today they use: a paper diary and WhatsApp — not a competitor, which means the switch has no migration cost but also no budget line.

Customer segments

Solo and two-practitioner physio practices. Early adopters: those already running a waiting list in a spreadsheet — they have proven the pain by building a workaround.

Unique value proposition

"A cancelled slot fills itself before I notice it was empty."

Solution

1. Auto-offer freed slots to the waiting list by SMS. 2. One-tap rebooking, no login. 3. A weekly no-show summary. Cut: the analytics dashboard — it matched no listed problem.

Channels

One repeatable path: the two national physio association newsletters. Not conferences, not ads — those were experiments, not a channel.

Revenue streams

€39/month per practitioner, monthly, no annual option at launch — we do not yet know retention, and annual billing would hide that for a year.

Cost structure

~€48k/year to run (one salary, SMS costs, hosting). Acquisition ≈ €120 per practice, almost entirely the newsletter placements.

Key metrics

Percentage of cancelled slots refilled within 24 h. Not signups, not logins — this is the promise, measured.

Unfair advantage

Empty, honestly. Revisit at 50 practices, when the waiting-list data across practices may become one.

Read what it exposes. Acquisition costs €120 against €39/month, so the model needs a practice to stay past month four just to break even — while there is no retention data and no annual billing to hide behind. That is not pessimism; it is the cost block and the revenue block being made to face each other on one page, which is the whole reason the format exists.

Fill it in here

Below is the real application running in this page, with the canvas already laid out. Click a block and type.

The Lean Canvas, editable — nothing is uploaded, no account

The honest catch: this is the free demo, and it lets you fill in everything. What it holds back is taking your work out again — PNG, PDF and Markdown exports, saving a .tabtree file to your disk, and automatic backup to a folder. Those unlock with a free account: $0, no card.

Adapt it to your case — and know when to stop using it

The Lean Canvas was designed around a specific situation: a small team, an unproven problem, and a product that can be built quickly. The further you are from that, the more it needs bending — and at some point it stops being the right tool at all. That second half is the part guides leave out, and it is more useful than another block-by-block walkthrough.

Fill it in three times, not once. One canvas per customer segment, because the problem block changes completely between segments. A single canvas averaging two segments describes nobody. This is the most common adaptation and the most useful.
Deep-tech and regulated products need the operational blocks back. If approval, certification or a supply chain is the actual risk, the four blocks the Lean Canvas removed are exactly the ones you needed. Use the Business Model Canvas, or keep both side by side.
Marketplaces need two canvases. Supply and demand have different problems, different early adopters and different channels. Forcing them into one canvas hides that you are validating two businesses.
Retire it at product-market fit. Once customers are paying and renewing, the risk moves from "is this real" to "can we run this profitably" — and the canvas that answers that is the Business Model Canvas. Keeping the Lean Canvas past this point is how teams keep re-validating a problem they already solved.

This is the practical reason to keep a canvas as a document rather than a picture. In the editor above you can duplicate the whole canvas to run one per segment, add or split blocks, and put two versions side by side — which is the comparison the format was invented for and the one a printed template makes impossible.

Worth knowing, because it is what people do next: the same document opens as a presentation with F5 — for the investor meeting where you defend the model — and the experiments coming out of it can be tracked on a kanban board or a timeline. Nothing is converted and nothing is lost; they are views of the same file.

Which canvas should you actually use?

Use	When	Why
Lean Canvas (this page)	Nothing is built yet and the real risk is whether the problem is real	Swaps the operational blocks — unanswerable before launch — for problem, solution, key metrics and unfair advantage
Business Model Canvas	The business already runs, or you must show how it pays for itself	The only one of the three putting cost structure directly against revenue streams
Value Proposition Canvas	The model holds but the promise is not landing	Zooms into two blocks only — segment and value proposition — as jobs, pains and gains

All three, plus SWOT, AARRR, the 1-Page Marketing Plan and eight more, are on the frameworks page.

Common questions

In what order should I fill it in?

Problem and customer segments together first — a problem only means something for a named person. Then unique value proposition, then solution, deliberately after the promise so features are answers rather than starting points. Then channels, revenue and costs. Unfair advantage last, and leave it empty if it is empty.

Is the Lean Canvas better than the Business Model Canvas?

Neither is better; they answer different questions. The Lean Canvas is about whether a business should exist, the Business Model Canvas about whether it can run. Teams that pick by preference rather than by stage usually end up with a canvas that avoids their actual risk.

Can I use the Lean Canvas commercially?

The Lean Canvas is by Ash Maurya, adapted from the Business Model Canvas by Strategyzer AG, and published under Creative Commons BY-SA 3.0 — commercial use is permitted with attribution and share-alike on derivatives. That attribution travels inside the template here, at the foot of the canvas, so a copy you export or share keeps it. What you write in your own canvas is yours.

Is this free, and does anything get uploaded?

Free, no account, and nothing uploaded — TabTree is a single HTML file running in your browser. You can prove it by disconnecting from the internet before you start. The demo holds back only the exports and the saving; those come with a free account — $0, no card. The set-up guide covers the rest.

Open the canvas → Get the licence — one payment