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Duffel

APIs for searching, booking flights

Overview

Duffel provides a suite of APIs that let travel sellers search, book, and manage flights. It works by offering developer-friendly endpoints that connect to many airlines, support changes and cancellations, and enable add-ons like paid seats, baggage, and pay-later options. It also supplies extensive documentation, client libraries (Node.js, Python, Ruby), and prebuilt UI components to simplify integration and product design. Duffel differentiates itself by focusing on a scalable, API-first platform that lets both traditional travel agencies and non-traditional sellers easily embed flight functionality into their own systems, with revenue tied to clients’ usage. The company’s goal is to help travel sellers diversify revenue streams and improve the end-to-end customer experience through a flexible, integrable flight API platform.

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About Duffel

Simplify's Rating
Why Duffel is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Data & AnalyticsEnterprise SoftwareFintech

Company Size

51-200

Company Stage

Late Stage VC

Total Funding

$102.5M

Headquarters

London, United Kingdom

Founded

2017

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What believers are saying

  • October 2026 Robinhood partnership expands Duffel into premium consumer finance distribution.
  • September 2026 Muse integration exposes Duffel to millions of Meta users.
  • April 2026 Cars launch and November 2026 Katanox deal deepen platform lock-in.

What critics are saying

  • Airline and hotel suppliers can bypass Duffel with direct APIs and contracts.
  • Travel booking intermediaries face thin margins; one disruption breaks Robinhood and Muse integrations.
  • Duffel's 2019 Series A funding leaves it exposed if growth slows before scale.

What makes Duffel unique

  • Duffel unifies flights, stays, and cars through one API across 500+ airlines.
  • Robinhood and Meta Muse use Duffel for embedded travel bookings in 2026.
  • Duffel added Katanox in November 2026 for hotel payments and financing.

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Funding

Total Funding

$102.5M

Above

Industry Average

Funded Over

5 Rounds

Late VC funding comparison data is currently unavailable. We're working to provide this information soon!
Late VC Funding Comparison Coming Soon

Benefits

  • Health Insurance
  • Dental Insurance
  • Vision Insurance
  • Unlimited Paid Time Off
  • Flexible Work Hours
  • Remote Work Options
  • Paid Vacation
  • Sabbatical Leave
  • Hybrid Work Options
  • Stock Options
  • Company Equity
  • 401(k) Retirement Plan

Growth & Insights and Company News

6 month growth

3%

1 year growth

0%

2 year growth

1%
Skift
Nov 11th, 2026
Duffel-Katanox partnership targets AI agents, hotel booking breakdowns.

Duffel-Katanox partnership targets AI agents, hotel booking breakdowns. Today at 6:01 AM PST Duffel is partnering with Katanox, a hospitality financial technology company, to simplify how hotels receive bookings and payments. The aim is to fix a chain that can leave travelers stranded at check-in and sellers chasing commissions months after checkout. The partnership, announced Wednesday, will link Katanox's hotel distribution and payment infrastructure to Duffel's platform. The travel tech infrastructure company, which allows businesses to embed flight, hotel, and travel-extra bookings directly into their own apps or websites, is known most recently for powering travel for the likes of Robinhood and Meta's AI agent Muse. On hotels alone, Duffel's scope spans 1.6 million properties worldwide. "It's been staggering, the number of times where the customer arrives at the property and they don't have the booking - the hotels can't find it or weren't getting the right reservation number. I'm hoping we can just put an end to it," Duffel co-founder a Adriana Lee is Skift's travel technology and AI reporter. She has been covering technology for nearly 20 years, from consumer to enterprise. For confidential tips or leads, reach her on Signal at adriana.133

MoneyMakers
Nov 6th, 2026
AI, specialists and pricing.

AI, specialists and pricing. Humoniq combines AI with specialists who step in when judgment is needed. The service is designed to work within an airline's systems and rules. A per-resolution model ties the offer to completing a request rather than staffing a support seat. For an airline, that could change how it pays for fluctuating demand. On its low-labor-cost page, Humoniq publishes a price of $1 per resolved request, with specialists handling exceptions. An early airline focus. Humoniq says its service is in production and resolving passenger requests. Todd Sullivan is co-founder and CEO. Humoniq was founded in 2025, according to its Y Combinator directory listing. Why Humoniq is worth watching. Humoniq says it went live with a travel management company in 2026 and is integrated with Amadeus, Sabre and Duffel. Adapting that experience to an airline could broaden its market, but would depend on fitting the service to the airline's systems and rules.

Crowdfund Insider
Oct 8th, 2026
Robinhood markets teams up with Duffel for travel portal, adds $25M in bitcoin (BTC) to balance sheet.

Robinhood markets teams up with Duffel for travel portal, adds $25M in bitcoin (BTC) to balance sheet. October 8, 2026 @ 2:40 pm By Omar Faridi Robinhood (NASDAQ: HOOD) is pushing further into everyday spending by wiring a travel booking portal into its app, and it is doing so with inventory and booking infrastructure from Duffel, the London travel-technology company that sells flights, stays, and related services through a single programming interface. The tie-up puts Duffel behind the brokerage's own travel surface, the channel Robinhood already uses to steer cardholders toward flights, hotels, and rental cars booked inside its ecosystem rather than on an outside agency site. Duffel's product is built for companies that want travel inside an existing app without standing up airline contracts, hotel agreements, as well as agency accreditation on their own. Through that interface, a partner can search live fares, complete a reservation, and handle changes or cancellations, while the customer never leaves the host brand. Duffel has described flight access covering more than 500 airlines and lodging inventory running into the millions of properties, and it has already been embedded by spend management and rewards platforms that want the same pattern: book in place, pay with the partner's card or points, and keep the receipt inside the original product. Robinhood's portal follows that model. Elevated rewards on the Platinum Card depend on booking through it, including a higher cash-back rate on eligible flights and a still higher rate on eligible hotels and rental cars. Annual flight and hotel credits, plus a network of premium properties that can include early check-in, room upgrades when available, and late checkout, are likewise tied to portal activity. A supplier that can return live prices and manage the booking after purchase lets Robinhood attach those benefits at checkout and send customers to its travel partner for support from inside the app. The travel step lands in the same week Robinhood put bitcoin on its own books. Johann Kerbrat, senior vice president and general manager of crypto and international, told media outlets that the firm has added about $25 million of bitcoin to the corporate balance sheet. He framed the buy as a signal of alignment with the bitcoin community, not as a change in how the company allocates capital. Against a market value near $100 billion, he said, the holding is too small to alter Robinhood's trajectory. Shares had closed the prior session down 1.85 percent at $112, a level consistent with that valuation. The corporate stake should not be confused with customer crypto. Analytics estimates have placed digital assets linked to Robinhood custody wallets near $25 billion across multiple chains, including a large bitcoin balance that belongs to users. Kerbrat's comment closes months in which management had said a treasury allocation was still under consideration. Because the figure came in an interview rather than a securities filing, the exact size and cost basis may be updated when the company next reports. Together, the moves widen what can sit next to a brokerage account. Embedded travel gives Platinum cardholders a reason to book inside Robinhood and gives the firm a foothold in a category banks and fintechs have been adding through similar suppliers. The bitcoin purchase, modest next to both the market cap and the customer crypto book, puts a corporate holding beside an expanding crypto business that already includes a wallet, a layer-2 chain, and plans for perpetual futures. Neither item replaces stock, options, or crypto trading as the core franchise. Both show Robinhood treating the app as a place for spending and treasury signaling as well as for trades. Sponsored Links by DQ Promote

PhocusWire
Mar 18th, 2025
Lufthansa'S Ai Assistant Swifty Pilots With Swiss, Plots Next Steps

Artificial intelligence assistant Swifty, a startup supported by Lufthansa Innovation Hub, is piloting conversational booking on Swiss International Air Lines' website.The pilot, which will help Lufthansa Group gain insight for future AI-powered solutions, offers website users the option to book their flight using AI alongside traditional search. Get a dose of digital travel in your inbox each day

TravelMole
Apr 15th, 2024
Traveltek Announces Duffel Integration Into iSell Platform

Duffel's integration with Traveltek's iSell Platform marks a significant milestone in streamlining the process for agents to offer a diverse range of flights and services and the platform's growing list of capabilities.

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