Design a Platform/Marketplace Business Model
Product & Design · 2–3 weeks · Advanced
The job
Design a two-sided marketplace that solves the chicken-and-egg problem.
What the sponsor gets
Each canvas and map from this playbook — Persona Canvas, Value Proposition Canvas, Lean Canvas, Assumption Map, Experiment Canvas, Journey map — exports as a PDF, or as PowerPoint on Pro, straight from the session, and the whole run exports as one PowerPoint for the sponsor. Nothing is redrawn.
The method
Define the two sides and the core transaction
Clearly articulate who the two sides of the marketplace are, what value each side provides to the other, and what the core transaction looks like. If you cannot describe the exchange in one sentence, the model is too complex.
Tip: The side that is hardest to attract is the side you must acquire first — identify it now, because your entire launch strategy depends on it.
Build personas for both sides
Create a Persona canvas for a representative user on each side of the marketplace. Their motivations, pain points, and alternatives differ fundamentally — you are designing two products, not one.
Tip: Interview at least 5 people on each side before building the personas — marketplace assumptions are almost always wrong about at least one side.
Map the dual value proposition
Create a Value Proposition Canvas for each side of the marketplace. The supply side needs a compelling reason to list, and the demand side needs a compelling reason to search here rather than elsewhere.
Tip: If your value proposition to the supply side is "access to demand", you have a chicken-and-egg problem with no solution — find a standalone value for early supply-side adopters.
Model the platform economics
Create a Lean Canvas for the marketplace. Pay particular attention to revenue model (commission, subscription, freemium), cost structure (trust and safety, payment processing), and channels for acquiring each side.
Tip: Marketplaces that charge the supply side struggle to attract early listings — consider making the supply side free until you have proven demand.
Map the platform-specific risks
Identify assumptions about network effects, liquidity thresholds, trust mechanisms, and disintermediation risk. Plot by importance and certainty. The "minimum viable liquidity" assumption is almost always the most critical.
Tip: The biggest marketplace risk is not building the platform — it is reaching the liquidity threshold where supply and demand find each other reliably.
Map the demand-side journey
Create a Purchase Journey for the demand side from problem awareness through to completed transaction and repeat usage. Focus on trust signals, search quality, and the moment of commitment.
Tip: The first transaction is the hardest — design the journey to remove every possible friction point before asking for money or commitment.
Design the supply-side seeding experiment
Create an Experiment Canvas for your strategy to solve the cold-start problem. Test whether you can attract enough supply-side participants to create a credible marketplace before investing in demand generation.
Tip: Many successful marketplaces started by manually curating the supply side — do things that do not scale to prove the model before building the platform.
The canvases and maps
- Persona Canvas
- Goals, frustrations, behaviours, motivations and needs side by side, so the person you are designing for is specific enough to disagree about.
- Value Proposition Canvas
- Customer jobs, pains and gains face the products, pain relievers and gain creators meant to answer them, so fit is something you can check line by line.
- Lean Canvas
- Nine boxes from problem and customer segments through to costs and revenue, so a whole business idea fits on one page and its weakest box shows.
- Assumption Map
- Assumptions plotted by importance and certainty, so the leaps of faith that need testing first stand apart from the safe bets.
- Experiment Canvas
- Hypothesis, design, metrics and success criteria come before results and the decision, so the goalposts are written down before anyone sees the data.
- Journey map
- Stages run across and lanes run beneath them, so the experience reads in the order people live it and each low point lines up with what causes it.
What it doesn't do
It doesn't run the room for you or decide for the client. The steps, canvases and duration are a starting point you adapt; the judgement stays yours.