A map of the five pressures that decide how much profit any industry can keep for itself, and why two businesses that look alike can have completely different futures.
Every mental model answers a different kind of question. The compass below places Porter's Five Forces on two dimensions: how zoomed out it is (industry-wide vs. your specific firm), and whether it's built to diagnose a situation or to decide what to do next. This helps you know when to reach for it instead of a different tool.
Five Forces lives in the upper-left: it zooms out to the whole industry and it diagnoses structure rather than telling you what to do today. Once you understand the forces, you still need a firm-level tool — like a SWOT analysis or a positioning choice — to decide your next move.
Click each force to open it. Try to predict the one-line definition before you read it — that small act of guessing is what makes the idea stick.
0 of 5 forces opened
How easily could a new competitor set up shop and take your customers?
This force is weak when it's expensive or slow to enter: heavy capital requirements, regulatory approval, strong brand loyalty, patents, or the need for a huge customer base before the economics work (network effects). It's strong when a newcomer could start cheaply and fast — many software categories, local services, and direct-to-consumer brands fall here.
Ask yourself: If I gave a smart, funded competitor six months and no inside knowledge of my business, how close could they get?
How much leverage do the people you buy from have over your costs?
Supplier power rises when there are few suppliers, when switching suppliers is costly, when the supplier's input is critical and hard to substitute, or when the supplier could plausibly become your competitor (forward integration). It falls when inputs are commodities with many interchangeable sources.
Ask yourself: If my main supplier doubled their price tomorrow, how many real alternatives would I have by Friday?
How much leverage do your customers have over your prices and terms?
Buyer power rises when customers are few and large (think: one retailer representing 40% of your revenue), when products are undifferentiated, when switching costs are low, or when buyers have full price transparency. It falls when you serve many small customers who have no realistic alternative and face real switching friction.
Ask yourself: Could any single customer walk away without hurting them nearly as much as it would hurt me?
Could customers solve the same problem a completely different way?
This is easy to miss because a substitute isn't a competitor in your category — it's a different category solving the same job. Video calls substituted for business travel. Email substituted for the fax machine. Streaming substituted for the DVD rental counter. Substitute threat is high when switching to the alternative is cheap and the alternative keeps getting better.
Ask yourself: What job is my customer really hiring me to do — and what else could do that job?
How hard are existing players already fighting each other?
Rivalry intensifies with many similarly sized competitors, slow industry growth (you can only grow by taking share from someone else), high fixed costs that pressure everyone to keep volume up even at thin margins, low differentiation, and high exit barriers that keep weak competitors from leaving. This is the force most people notice first — and often the only one they think about.
Ask yourself: If the whole market stopped growing tomorrow, how brutal would it get in here?
The same five questions, four very different industries. Switch tabs to see how the forces shift.
| Force | Reading |
|---|---|
| New entrants | Moderate — gates, slots, and capital are real barriers, but low-cost carriers still find openings. |
| Suppliers | Very high — essentially two aircraft makers (Boeing, Airbus) and powerful pilot unions. |
| Buyers | Very high — travelers compare prices in seconds and have near-zero loyalty on price-driven routes. |
| Substitutes | Moderate — trains and video conferencing substitute on shorter trips and business travel. |
| Rivalry | Very high — high fixed costs push everyone to fill seats even at thin or negative margins. |
Why it matters: Four of five forces run hot, which is a structural reason the airline industry has produced some of the worst average returns on capital of any major sector, even when individual airlines are well run.
| Force | Reading |
|---|---|
| New entrants | High for simple tools, low for products requiring deep integrations, compliance certifications, or large sales teams. |
| Suppliers | Usually low — cloud infrastructure is a competitive, substitutable commodity. |
| Buyers | High if selling to a few large enterprise accounts; low if selling to thousands of small accounts. |
| Substitutes | Often high — spreadsheets, manual processes, or a competitor's adjacent feature can quietly substitute. |
| Rivalry | Variable — fierce in crowded categories, muted where one product has become the default. |
Why it matters: Two SaaS companies with near-identical products can have opposite economics depending on who they sell to and how deeply the product gets embedded in a customer's workflow.
| Force | Reading |
|---|---|
| New entrants | Very high — modest capital, no patents, no license scarcity in most cities. |
| Suppliers | Low to moderate — many coffee roasters and equipment vendors compete for your business. |
| Buyers | High on price, lower on convenience — most customers choose the nearest decent option out of habit. |
| Substitutes | High — home brewing, office coffee machines, and energy drinks all compete for the same job. |
| Rivalry | High in dense areas, low in underserved neighborhoods. |
Why it matters: A coffee shop rarely wins by being structurally protected — it wins by building a local habit loop (location, speed, relationships) that a Five Forces view by itself won't fully capture.
| Force | Reading |
|---|---|
| New entrants | Very low while patents hold — years of trials and regulatory approval block fast copying. |
| Suppliers | Low to moderate — active ingredient sourcing is usually manageable. |
| Buyers | Moderate — insurers and health systems negotiate hard, but physicians and patients still drive demand. |
| Substitutes | Low while the drug is the best available treatment; rises sharply once alternatives or generics appear. |
| Rivalry | Low during patent protection, then spikes the day the patent expires. |
Why it matters: This is a textbook case of forces that change sharply at a known date — the "patent cliff" — which is why the model works best as a living read, not a one-time snapshot.
Scenario: You're advising a founder who wants to launch a subscription meal-kit service in a mid-sized city. They have a decent recipe and a delivery van. Should they go for it, and what should they watch for?
Almost nothing stops a competitor from copying the recipe idea next quarter: no patents, modest capital, commodity ingredients, and easy-to-hire delivery drivers. Implication: whatever edge the founder builds in month one will likely be copyable by month four. The plan needs a reason competitors can't just copy the playbook — a chef's recipe IP, an exclusive local supplier deal, or a subscriber base that's expensive for a copycat to out-market.
Local farms and specialty food distributors have some leverage, especially for signature or seasonal ingredients. Implication: lock in two supplier relationships per key ingredient, not one, so a bad harvest or a price hike doesn't force a menu rewrite.
Meal-kit customers compare price per meal easily and cancel in two clicks. Implication: the real product isn't the first box, it's reducing the reasons to cancel box six — portion consistency, delivery reliability, and recipe variety matter more than a flashy launch promotion.
Grocery delivery apps, pre-made meal services at the supermarket, and simply eating out all solve the same "I don't want to cook from scratch tonight" job. Implication: the pitch can't just be "meal kits vs. other meal kits" — it has to beat the convenience of a 12-minute grocery delivery app on at least one dimension customers actually care about (cost, health, or time saved).
A city with three existing meal-kit or ghost-kitchen players will be a margin fight from day one. A city with none might mean the founder is early — or it might mean the category doesn't work locally. Implication: the founder's city-selection decision is doing as much strategic work as the product itself.
Nothing here says "don't do it." It says: this industry structure is unforgiving, so survival depends on a specific, defensible edge (a supplier lock, a loyalty mechanic, or a cost advantage) rather than on execution speed alone — because speed is exactly what a low-barrier industry rewards everyone else to copy.
Fill in a few details about a real industry or business you're curious about, and this will assemble a ready-to-use prompt you can paste into any AI assistant to get a tailored Five Forces analysis.
This turns Porter's Five Forces into a reusable instruction set you can keep and hand to an AI assistant any time you need this kind of analysis — no need to re-explain the framework each time.