VOL. XCIV, NO. 247
★ WIDE MOAT STOCKS COMPARISON ★
NO ADVICE
Thursday, January 8, 2026
Stock Comparison
Duolingo, Inc. vs West Pharmaceutical Services, Inc.
Compare moat strength, market structure, and segment coverage to understand how each company defends its edge.
Duolingo, Inc.
DUOL · NASDAQ
Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.
Full stock profile
Dive deeper into Duolingo, Inc.'s moat claims, evidence, and risks.
View DUOL analysisWest Pharmaceutical Services, Inc.
WST · New York Stock Exchange
Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.
Full stock profile
Dive deeper into West Pharmaceutical Services, Inc.'s moat claims, evidence, and risks.
View WST analysisComparison highlights
- Moat score gap: West Pharmaceutical Services, Inc. leads (85 / 100 vs 68 / 100 for Duolingo, Inc.).
- Segment focus: Duolingo, Inc. has 2 segments (93.9% in Duolingo App); West Pharmaceutical Services, Inc. has 2 segments (80.7% in Proprietary Products).
- Primary market structure: Competitive vs Quasi-Monopoly. Pricing power: Moderate vs Moderate.
- Moat breadth: Duolingo, Inc. has 6 moat types across 3 domains; West Pharmaceutical Services, Inc. has 5 across 3.
Primary market context
Duolingo, Inc.
Duolingo App
Mobile-first, freemium language learning and adjacent subjects (math, music)
Global
Consumers (end-users); advertisers
Digital learning platform / content & software publisher
93.9%
West Pharmaceutical Services, Inc.
Proprietary Products
Injectable primary packaging components and containment/delivery systems (elastomeric stoppers, seals, plungers, syringe/cartridge components; related services)
Global
Biologic, generic, and pharmaceutical drug manufacturers
Primary packaging and delivery component supplier
80.7%
Side-by-side metrics
Moat coverage
Shared moat types
Duolingo, Inc. strengths
West Pharmaceutical Services, Inc. strengths
Segment mix
Duolingo, Inc. segments
Full profile >Duolingo App
Competitive
Duolingo English Test
Oligopoly
West Pharmaceutical Services, Inc. segments
Full profile >Proprietary Products
Quasi-Monopoly
Contract-Manufactured Products
Competitive
Want the full wide moat stocks list?
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View the moat stocks listLooking for expansion-stage stocks?
Proven models entering the expansion stage with unit economics that work.
View expansion-stage stocksCuration & Accuracy
This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).
Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.