What is disruptive innovation?
Disruptive innovation is a theory developed by Harvard Business School professor Clayton Christensen, introduced in his 1997 book "The Innovator's Dilemma." It describes the process by which an innovation — typically starting at the lower end of the market or in a previously unserved niche — eventually displaces established market leaders.
Disruption begins when an entrant offers a product or service that is initially simpler, cheaper, or more accessible than the offerings of incumbent competitors. Incumbents typically ignore the early entrant because it serves customers they do not value — but as the entrant improves, it eventually attracts their mainstream customers.
Why incumbents fail to respond
Christensen's central insight is that incumbents fail to respond to disruptive threats not because they are poorly managed, but because they are well-managed. They focus on serving their most profitable customers, listening to their most valued customers, and investing in innovations that will appeal to those customers. This rational behaviour makes them blind to disruption emerging at the periphery of their market.
By the time the disruption is visible at the mainstream level, the entrant often has insurmountable advantages in cost, efficiency, and customer relationships in the new paradigm.
Low-end and new-market disruption
Christensen identified two types of disruption. Low-end disruption targets the least profitable customers of incumbents — those who are over-served by the current offering and would be happy with something simpler and cheaper. New-market disruption creates an entirely new market by making a product or service accessible to people who previously had no access at all.
Streaming services disrupted traditional broadcast television largely through new-market disruption — reaching audiences who previously consumed little or no paid video content.
Distinguishing disruptive from sustaining innovation
Sustaining innovations improve existing products for existing customers — adding features, improving quality, raising performance. These are important but do not typically change the competitive order of the industry. Disruptive innovations, by contrast, introduce a different set of values that appeal to a different or underserved group of customers, eventually redefining the competitive landscape.
Most major businesses invest heavily in sustaining innovation and much less in disruptive innovation — which creates the vulnerability Christensen identified.
How businesses can respond to disruption
Established businesses can respond to disruption by creating separate units dedicated to exploring disruptive opportunities, investing in potentially disruptive technologies or startups, and being willing to cannibalise their own business before a competitor does.
For strategists and advisors, helping clients identify whether disruption is a threat in their industry — and developing proactive responses — is one of the most valuable and urgent strategic conversations available.