Diffusion of Innovations Curve
Rogers' Diffusion of Innovations curve maps how adoption of anything new spreads through a population in five waves, from innovators to laggards, so you can see which wave you're selling to and why the tactics that worked on one wave stop working on the next.
A bell-shaped curve climbs and falls across five labelled segments, tracking a small first group through to the last holdouts.
Reach for this when…
- Early growth was fast and has now stalled, and you don't know if that's normal or a warning.
- You're still using the pitch that won your first customers, and it's stopped converting.
- You need to decide whether to chase the mainstream now or keep serving the enthusiasts.
How to run it
- Identify which wave you're actually in by adoption behaviour, not by revenue alone.
- Match your message to the wave: risk and novelty for innovators, proof and peers for the majority.
- Watch for the chasm between early adopters and the early majority, it's the point most products stall.
- Shift your channel and proof points as you cross from one wave into the next.
- Plan for laggards separately, they may need a different product entirely, not just more convincing.
A worked example
Situation. Aline Uwase built AgriRwanda, an agricultural advisory app for smallholder farmers across rural areas outside Kigali, Rwanda. The first 2,000 users, mostly younger, tech-curious farmers, signed up fast, then growth flattened for six months.
Applied. She recognised the flattening as the classic gap between early adopters and the early majority, and switched her pitch from 'try this new tool' to peer proof, cooperative leaders showing yield results to their own members, rather than more app-store advertising.
Result. Adoption resumed within a season, driven by cooperative referral rather than marketing spend, as the early majority responded to a trusted peer rather than the new-technology pitch that had worked on the innovators but not on them.
The catch
The curve describes an aggregate pattern, it doesn't tell you how long each wave takes or guarantee your product ever crosses the gap, plenty of good products die between early adopters and the majority. It also assumes a single population adopting one thing, real markets often have several overlapping curves for different segments at once.
The tactics that win your innovators are often the exact tactics that repel your early majority. Keep using them past the gap and growth doesn't slow, it stops.
Origin: Everett Rogers. The 'chasm' step later in this card is Geoffrey Moore's addition (Crossing the Chasm, 1991), not part of Rogers' original theory.