Substitute
Updated July 18, 2026
In Porter's framework, a product or service from outside the industry that fulfills the same customer need. Substitutes cap industry profitability.
Also known as: Substitute product, Substitute good
Substitutes are the competition you rarely see on an analyst quadrant. A video call substitutes for a business flight, a spreadsheet substitutes for a project-management tool, and a ride-hailing app substitutes for owning a car: none of these pairs share an industry, yet each one competes for the same job the customer needs done. Because substitutes come from outside the market's conventional boundaries, they are systematically underweighted in competitive analysis, which tends to fixate on firms that look alike.
The economic effect of a substitute is a ceiling. When an alternative from another industry offers an attractive price-performance trade-off, every firm inside the industry loses pricing power: push prices too high and customers defect not to a rival vendor but out of the category entirely. Entire industries have had their economics reset this way: streaming did it to physical media, and email did it to fax.
For competitive intelligence teams, substitutes matter because they explain losses that competitor battlecards cannot. A SaaS vendor that only tracks lookalike products will misread every deal lost to a spreadsheet, an internal build, or a decision to do nothing. Treating those outcomes as substitution, and monitoring the categories they come from, closes one of the most common blind spots in CI programs.
Origins: Porter's Five Forces
The threat of substitutes is one of the five forces in Michael Porter's framework for analyzing industry structure, introduced in his 1979 Harvard Business Review article 'How Competitive Forces Shape Strategy' and developed at length in his 1980 book Competitive Strategy. Alongside rivalry among existing competitors, the threat of new entrants, and the bargaining power of buyers and suppliers, substitution pressure helps determine how profitable an industry can be for everyone in it.
Porter's key insight was that competition is broader than the fight among direct rivals. An industry can have gentle head-to-head rivalry and still earn poor returns if a substitute from elsewhere limits what customers are willing to pay. That is why a serious industry analysis always asks what performs the same function through a different means: not just who else sells the same product.
How substitutes cap prices and profits
A substitute constrains an industry the way a competing bid constrains an auction: it defines the point at which the customer walks away. If videoconferencing is good enough for most meetings, airlines cannot price business travel as if flying were the only option. If a shared spreadsheet handles a small team's pipeline, a CRM vendor's entry-level tier has to be priced against free.
The pressure intensifies as the substitute's price-performance trade-off improves. Substitutes often start as a poor imitation serving price-sensitive buyers, then ride a steeper improvement curve than the incumbent product: which is why the threat is easiest to dismiss exactly when it is growing fastest. Falling switching costs, whether technical or contractual, amplify the effect, because customers can act on the alternative the moment it becomes attractive.
Substitute vs. indirect competitor
The two ideas overlap and are often conflated, but the lens differs. Indirect competitors sit in or near your market: they sell a different product to your audience or your product to a different audience, and you may meet them in deals. Substitutes are defined by function rather than market membership: they satisfy the same underlying need through a fundamentally different means, usually from an industry you would never list in a competitive set.
A practical test: an indirect competitor shows up when you map who else the buyer might purchase from; a substitute shows up when you map what else could make the purchase unnecessary. For a meeting-scheduling tool, another calendar product aimed at recruiters is an indirect competitor; an executive assistant, or simply emailing back and forth, is a substitute.
What determines the threat level
Substitution pressure is strong when three conditions line up. First, the substitute offers a compelling price-performance trade-off relative to the industry's product: it does not need to be better, only good enough at a meaningfully lower total cost. Second, the buyer's cost of switching to it is low: no long contracts, no data lock-in, no retraining. Third, buyers are actually inclined to substitute, which depends on habit, risk tolerance, and how central the product is to their work.
The threat is weak when the industry's product does something the substitute structurally cannot, or when switching means abandoning accumulated data, integrations, and workflows. That is why so much SaaS strategy (platform ecosystems, native integrations, stored history) is, at bottom, a defense against substitution as much as against rivals.
Tracking substitutes in a CI program
Substitutes rarely announce themselves as competitors, so the signals live in different places than direct-competitor intelligence. Win/loss data is the richest source: losses coded as 'no decision', 'built in-house', or 'staying on spreadsheets' are substitution losses, and their rate over time measures the threat directly. Sales-call notes and churn interviews reveal which alternatives buyers weigh even when no rival vendor is in the deal.
Outside your own data, watch the substitute categories themselves the way you watch competitors: pricing changes, capability announcements, and messaging that starts to target your use case. A general-purpose tool adding a template for your workflow is a substitution signal worth an alert. Website-monitoring and competitor-tracking tools help here because the same change detection that watches rivals can watch a substitute category just as easily.
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Frequently Asked Questions
What is a substitute in Porter's Five Forces?
It is an offering from outside an industry that performs the same function as the industry's product through different means: videoconferencing in place of business travel, for example. The threat of substitutes is one of Porter's five forces because attractive substitutes limit the prices an industry can charge, capping its profit potential.
What is the difference between a substitute and an indirect competitor?
An indirect competitor operates in or near your market: same audience with a different product, or same product for a different audience. A substitute comes from outside the industry entirely and meets the need through a different mechanism, like a spreadsheet standing in for project-management software. Indirect competitors compete for the purchase; substitutes can make the purchase unnecessary.
What makes the threat of substitutes high?
Three things: the substitute offers a strong price-performance trade-off relative to the industry's product, the buyer's switching costs are low, and buyers are willing to change how they meet the need. When all three hold, the substitute sets a hard ceiling on pricing. When switching is costly or the substitute is clearly inferior for the core use case, the threat stays weak.
Is 'doing nothing' a substitute?
In practice, yes: for many products, especially B2B software, the status quo is the most common alternative buyers choose. Manual processes, spreadsheets, or simply tolerating the problem all satisfy the need at zero license cost. Deals lost to no decision are substitution losses, and CI and win/loss programs should track them as deliberately as losses to named competitors.
What are common examples of substitute products?
Classic pairs include video calls for business travel, streaming for physical media, email for fax, ride-hailing for car ownership, and plastic or aluminum for steel in packaging. In SaaS, the recurring substitutes are spreadsheets, general-purpose tools stretched to cover a niche use case, internally built software, and outsourcing the task to people instead of software.
Related terms
Companies selling the same thing to a different audience, or selling to the same audience with a different product.
Direct CompetitorsCompanies competing head-to-head for the same customers with similar products in the same market segment.
Adjacent Competitor (Adjacent Entrant)A company from a neighboring market that could plausibly expand into your space, often more dangerous because they bring an existing user base and distribution.
Competitive SetThe specific group of companies a firm considers its direct competitors for a given product, segment, or customer need.
Competitive LandscapeA structured overview of all relevant competitors in a market, their relative positions, strengths, weaknesses, and strategic trajectories.
Emerging CompetitorsNew market entrants requiring proactive detection and monitoring before they become direct threats.
Strategic GroupA cluster of firms within an industry that pursue similar strategies along key dimensions (e.g., price vs. breadth).
Tier 1 CompetitorsThe 3-5 most frequently encountered competitors in sales opportunities, identified through CRM data.