Every AI founder has the Claude Spookies right now. Will Claude’s next release kill our product? I studied the fastest-growing vertical AI companies (e.g. Cursor, Sierra, Legora) to uncover the 3 moats that actually hold.
In February 2026, one Anthropic update made Ryze AI, a startup with a 70% deal close rate, irrelevant overnight. The founder posted "Claude killed my startup." Every founder felt it. The week Anthropic released Cowork, $1 trillion of value was wiped from the stock market. Last week, Anthropic released 10 finance agent templates and FactSet dropped 8.1% the same day
With OpenAI re-entering enterprise, model providers will keep moving up the stack as competition heats up.
At the same time, vertical AI companies are growing at insane rates.
@cursor_ai added $1B in ARR in a single quarter (Coding).
@WeAreLegora hit $100M ARR in 18 months and
@evenuplaw 4X'ed revenue to $100M (Legal). Abridge went from $8M to $117M ARR in 15 months (Healthcare).
@SierraPlatform hit $150M in 2 years (Customer service).
These companies share 3 moats that make customers choose them over Claude:
1. Proprietary data loops that compound
Abridge is built on 50M clinical conversations. EvenUp built a proprietary settlement database of 200K cases and millions of medical records. Clay has a data marketplace that's needed despite LLMs commoditizing outbound. Sierra's Journeys codify each customer's voice, procedures, & brand that compound over time. These data investments are too fringe for LLMs, but they matter to busy customers who need time to value.
2. UX is built for the customer’s workflow
Abridge saves physicians 2 hours a day, because it lives inside Epic's native interface. Legora lives inside Word and Outlook, where lawyers already work. Its tabular view makes bulk actions like reviewing 500 customer contracts during an M&A deal easy. Cursor is so good at embedding into the org's workflows and context, making it easy to go from feedback to PRs. The workflow-native UX, paired with FDEs who know the buyer's domain, are why vertical AI keeps winning deals over LLMs.
3. Platform leverage that compounds
The best vertical AI companies are consolidating workflows and becoming the platform other workflows route through. Legora is now an agentic OS for legal work, embedding inside Microsoft Word and law firm document management systems. Abridge started with clinical notes but is expanding into orders, prior auth, and revenue cycle, becoming infrastructure across 250 health systems. While general-purpose models will accrue more integrations, they can't replicate a platform that third parties have already built their businesses on.
At
@mutinycorp we're investing in all three: workflow-native UX, proprietary contact-level analytics from owning the asset layer, and a platform play we'll share more on soon.
The Claude Spookies are real, but so is the demand. The $10B vertical AI winners will nail time-to-value and get harder to rip out the longer you use them.