Porter's Five Forces for marketing: turning each force into a positioning, pricing or channel decision

Porter's Five Forces is a way to judge how much profit an industry lets its players keep, by looking at five pressures: rivalry among existing competitors, the threat of new entrants, the threat of substitutes, the bargaining power of buyers, and the bargaining power of suppliers. Marketers use it to choose which segment to enter, how to position against rivals, how hard buyers will push on price, and which channels give them control.

Where the framework comes from

Michael Porter of Harvard Business School introduced the framework in the Harvard Business Review in 1979 and restated it in the article The Five Competitive Forces That Shape Strategy in January 2008. Its core claim is that industry structure, not only the quality of a company's management, sets the average profitability of that industry. A business in a market with strong forces against it must work harder for the same return, and a marketer who sees those forces early can choose a better place to play.

Each force as a marketing question

Force	What it measures	The marketing question
Rivalry among competitors	How intensely existing firms fight for the same buyers	On what do we differ enough that a buyer can say it in one sentence?
Threat of new entrants	How easy it is for newcomers to arrive	What do we build that is slow to copy: brand, data, relationships, distribution?
Threat of substitutes	Other ways to solve the same problem	What are buyers really comparing us with, including doing nothing?
Buyer power	The buyer's ability to push price down or demand more	Are there few large buyers, or many small ones, and how easily can they switch?
Supplier power	The ability of suppliers and platforms to raise their price or change terms	Which channels, platforms or partners could change the terms we depend on?

Rivalry: decide the one thing you win on

When many similar firms compete, buyers compare on price because nothing else is clear. Rivalry is high when growth is slow, products look alike and exit is costly. The marketing response is to pick one dimension of difference and say it plainly, so a buyer can describe you without looking at your page. Map your three nearest competitors on the two or three attributes buyers name when they choose, and place yourself where the map has a gap. Tie the result to your positioning statement and to the messages you test.

New entrants: build what is slow to copy

Low barriers invite entrants, and new entrants usually come in on price or on a new channel. Barriers that a marketer builds include a trusted brand, a customer list you own, content that earns links, reviews accumulated over years, and relationships with distributors. Ask what an entrant with a large budget could not buy in a month. Spend your effort on those assets, and avoid putting your whole plan on a tactic that anyone can copy by lunch.

Substitutes: know the real competition

A substitute meets the same need in a different way. A video call substitutes for a flight, a spreadsheet for specialist software, an in house hire for an agency. Substitutes set a ceiling on price. For marketing this changes the message. If your buyer's real alternative is doing it themselves, your messaging must show the cost of that route in time and error, and not only claim to beat a named rival.

Buyer power: price, switching and information

Buyers are strong when they purchase in volume, can switch cheaply, know the market and see little difference between sellers. In consumer markets, comparison sites and reviews raise buyer power. In business markets, procurement teams and tenders do. Marketing tools that reduce buyer power include differentiated offers, bundles that raise switching costs in a fair way, loyalty and subscription terms, and a strong direct relationship. The tools that raise it are the sites that let buyers compare you line by line, so decide where you want to be listed and what the listing says.

Supplier power: the channel is a supplier

For a marketer, suppliers include the platforms and partners that deliver your customers: search engines, marketplaces, social networks, app stores, affiliate networks and distributors. When one channel sends most of your leads, it holds power over your cost per lead and your rules. Review your mix every quarter and find the share of leads and revenue from each source. Where one source holds a large share, invest in an owned channel such as an email list, a community or direct referrals so the terms are not set by others.

A five step way to run the analysis for a campaign

1. Define the market narrowly. Five forces for "software" is useless. Five forces for "booking software for independent physiotherapy clinics" is workable.
2. Rate each force low, medium or high with one line of evidence beside the rating: a count of competitors, a price comparison, switching steps, share of leads by channel.
3. Find the force that hurts most. That is the one the marketing plan must answer.
4. Write the response as a decision: position, price, channel or offer.
5. Revisit each quarter, because entrants and platform terms move.

A short example

Take a small business selling booking software to independent clinics. Rivalry is high, as several tools offer similar features. Entrant threat is medium, since new tools can launch fast but clinics value trusted data handling. Substitutes are strong: paper diaries and shared calendars. Buyer power is medium: clinics are small and switch rarely, though switching is easy before data is entered. Supplier power is high in one respect, because most leads arrive from one search engine. The marketing plan follows from that reading: position on one clinical workflow rivals ignore, show the cost of the paper diary, make the first month's data import free of effort, and build an email list and referral route so one platform does not hold all the leads.

Five forces beside the other frameworks

The forces describe the market. The marketing mix describes your offer inside it. Use the forces to decide where to compete and the mix to build what you sell there. Read the marketing mix and its template and the marketing environment guide for the neighbouring pieces.

The sixth reader of your competitor analysis

A five forces table is a private document, yet one of its forces now has a public, checkable version: the substitutes and rivals a buyer is shown when they ask an assistant. Someone who types a question about booking software for clinics into ChatGPT or Gemini gets a short list with reasons, and those names are the working definition of your rivals and your substitutes for that buyer. Ask the question your own customers would ask, record the names that come back, and compare that list with the one in your analysis. AI Knows Us repeats the question across five assistants and shows which names and which sources each answer used, so the rivalry row in your table can rest on what buyers are told, not only on your own competitor list.

Questions about Porter's Five Forces in marketing

Who developed Porter's Five Forces?

Michael Porter of Harvard Business School, who published it in the Harvard Business Review in 1979 and updated it in 2008.

Is it a marketing tool or a strategy tool?

It began as a strategy tool. Marketers use it to choose segments, positioning, pricing and channels.

How is it different from a SWOT analysis?

SWOT lists your strengths and weaknesses and outside opportunities and threats. Five forces examines the industry's structure and the pressure on profit.

Can a small business use it?

Yes. Define a narrow market, rate each force with one line of evidence, and act on the strongest.

What is the sixth force?

Some analysts add complementors, the products that make yours more valuable. Porter's original framework has five.