Porter's Five Forces | Katharyne Shelton

// description

Porter's Five Forces model assesses the competitive intensity and attractiveness of an industry by analysing five structural forces: the threat of new entrants, the bargaining power of suppliers, the bargaining power of buyers, the threat of substitute products, and the intensity of competitive rivalry. A market where all five forces are strong is difficult to profit in; a market where they are weak offers more opportunity.

// history

Michael Porter, a professor at Harvard Business School, introduced the five forces framework in his 1979 Harvard Business Review article "How Competitive Forces Shape Strategy" and expanded it in his 1980 book Competitive Strategy. The framework reshaped how businesses and investors evaluate industries, moving analysis beyond simple competitor counting to a structural understanding of profit potential.

// example

A creator considering the premium adult coloring book market runs a five forces analysis. Threat of new entrants: very high (low startup costs, AI image generation making entry even easier). Supplier power: low (KDP and POD services are widely available). Buyer power: high (many alternatives, low switching cost). Substitutes: moderate (digital coloring apps, other stress-relief activities). Rivalry: intense (saturated market). The analysis suggests generic coloring books are structurally challenged. The creator pivots to a specialty niche — coloring books for occupational therapy waiting rooms — where all five forces are weaker and buyers (OT practices) have less power than individual Amazon buyers.

// katharyne's take

Run a Five Forces analysis on any niche before you invest significant time in it. The most revealing force for KDP and Etsy creators is usually "threat of new entrants" — if a niche is very easy to enter, it will become saturated quickly regardless of how good your current products are. The niches worth building in are the ones with at least one force that provides natural protection: specialised knowledge requirements, hard-to-replicate aesthetic style, or a customer segment that takes time to build relationships with. These create a moat that pure AI generation can't easily cross.

// creative uses

Use the "threat of substitutes" force to stress-test a digital product idea: if Canva or ChatGPT already does what your product teaches, your substitute threat is critical and you need a sharper angle.
Apply buyer power analysis to your Etsy shop by checking how many near-identical listings appear in search — the higher the count, the more leverage buyers have to skip your listing entirely.
Identify a niche where supplier power is high (e.g., specialised professional content only practitioners can create) and position yourself as the credentialed insider — that's a structural moat most AI generators can't replicate.

// quick actions

Search your target KDP niche on Amazon right now: count the number of titles with under 10 reviews published in the last 90 days — high count means very high threat of new entrants.
Check the Amazon BSR of the top three titles in your niche weekly for one month; a dropping BSR on all three simultaneously signals rising rivalry intensity.
Write one sentence explaining what makes your specific niche hard to enter — if you can't write it, you don't have structural protection and need to niche down further.

// prompt ideas

Run a Porter's Five Forces analysis on the [niche] market on [KDP/Etsy] right now. For each of the five forces, give me a rating (low/medium/high), the specific factors driving that rating for this niche in [current year], and one implication for whether I should enter, stay, or pivot my strategy. Be direct about which forces are critical threats and which represent genuine opportunity.

I'm deciding between these three KDP/Etsy niches: [niche 1], [niche 2], [niche 3]. Using Porter's Five Forces, compare them on the two forces that matter most for indie digital product sellers — threat of new entrants and buyer bargaining power. Rank the three niches by structural attractiveness and explain what specific moat I would need to build in the winning niche to stay competitive for 18+ months.

The threat of new entrants in my current niche — [describe niche] — has increased significantly because [AI-generated content / a major creator entered / the niche went viral]. Walk me through how this changes the Five Forces picture, what my options are for re-establishing a structural advantage, and whether it makes more sense to niche down further, pivot, or build a brand moat in my existing position.