Zerolook is a flight-shopping API layer that answers large volumes of exploratory flight-search queries by using a machine-learning model to estimate itinerary prices and return predicted itineraries, prices, and confidence scores while operating outside the booking path.
Published Sep 7, 2026
—
| Aspect | Zerolook | Duffel | Travelport Universal API |
|---|---|---|---|
| Starting Price | Not publicly listed as fixed tiers; appears to use a usage-based model for search queries | Not publicly listed; typically quote/contract-based | Typically enterprise/GDS contracting; not publicly listed |
| Best For | OTAs, airlines, or developers needing lower-cost exploratory shopping at very high query volumes and willing to re-price at commit-to-book | Teams needing an end-to-end flights API (search → offer → order/booking; plus ancillaries/payments) | Enterprises needing traditional GDS content and pricing and established workflows |
| Key Strength | Cost control for high-volume exploratory traffic via ML estimation; operates outside the booking/distribution path | Unified API for shopping and booking flows; operational primitives documented | Mature GDS-based low fare shopping patterns and established airline content access |
| Key Weakness | Risk of price inaccuracy; limited public documentation and reviews; enterprise security posture not publicly documented | May be more expensive per exploratory query if used for everything; content coverage depends on supplier agreements | Can be costly at scale; heavier integration and commercial constraints |