From $14.7 Billion to $73 Million
Chegg's story is the most visceral data point in the horizontal gravity thesis. A publicly traded company, peaking at $14.7 billion in market capitalization in February 2021, cratered to $73 million by February 2026. Its share price hit $0.67. The NYSE issued minimum listing standard warnings.
Revenue declined 14% year-over-year in 2024, then accelerated to 43% year-over-year declines by Q3 2025. Subscribers fell from 7.7 million to 3.6 million. Over 1,100 employees were eliminated in three restructuring rounds. The company is now exploring acquisition or going private.
The Mechanism
Chegg's core value proposition was simple: expert answers to homework questions. Students paid a subscription. Experts provided answers. The platform mediated the transaction.
This is precisely the kind of vertical silo that horizontal gravity dissolves. The function — answering academic questions — was absorbed into the horizontal capability layer of free, general-purpose LLMs. ChatGPT, Claude, and Gemini don't charge $14.95/month for homework help. They provide it as one of thousands of capabilities within a unified interface.
Why It Happened So Fast
Education technology has uniquely low boundary conditions. Unlike healthcare (HIPAA, FDA), finance (SEC, fiduciary duties), or legal (attorney-client privilege), education has minimal regulatory friction protecting incumbent value propositions. There's no "homework answer privilege." No regulatory body certifying that homework help platforms meet safety standards.
The percolation threshold was crossed almost immediately after ChatGPT's launch in November 2022. Chegg's first revenue warning came just six months later.
Who's Next?
The horizontal gravity framework predicts that any vertical meeting these criteria faces similar risk:
- Information processing is the core value — the product transforms input data into output knowledge
- Low regulatory friction — no licensing, certification, or compliance barriers
- Substitutable by general-purpose AI — the capability doesn't require physical-world action
The current HGI for Education Technology is 0.58 and accelerating. By 2028, it's projected to reach 0.75 — critical absorption territory.
Look at the industries still in the emerging phase (HGI < 0.3): Healthcare IT and Legal Technology. Their boundary conditions — HIPAA, FDA, attorney-client privilege — are what's protecting them. But those boundary conditions don't eliminate horizontal gravity. They slow it.
The question for every vertical SaaS company: What's your boundary condition? And how long does it hold?