CROSS-CATEGORY: Vertical AI Agents Eat Legal, Accounting, and Healthcare SaaS by Selling Completed Work, Not Seats

Menlo Ventures·medium signal

Menlo Ventures and corroborating market data show vertical AI agents replacing vertical SaaS across three unrelated regulated categories at once: EvenUp auto-generates demand letters and settlement calculations for personal-injury firms (30,000+ cases, $1B valuation), Klarity handles ASC 606 contract review for accounting teams, and agent-driven prior authorization plus scheduling is eliminating entire staffing layers in healthcare. The unifying pattern — 'vertical SaaS showed and assisted; vertical AI reasons and executes' — is showing 3–5x higher retention than horizontal tools. Same disruption signal, simultaneously, in three industries that share no software stack.