Every few years someone announces that hotel distribution has changed for good. Usually they are half right. The new channel arrives, but the old ones do not leave. A hotel in 2026 can take bookings from a GDS, an OTA, a Google price link and an AI assistant on the same night.

For a hotel tech vendor, that layering is the whole story. Each era added a new place where rooms are sold, and each one changed what hoteliers needed to buy, who they bought from and which integrations decided the deal. Below is a dated timeline of the main shifts, with what each era meant for how vendors sell and integrate.

The five eras of hotel distribution at a glance. Free to share with a link back to this article.

Era 1: The GDS and the travel agent (1960 to mid 1990s)

1960: Sabre goes live

Sabre started as an airline system. According to SiteMinder’s history of Sabre GDS, the idea came after a meeting between an IBM salesperson and the president of American Airlines, and Sabre became operational in 1960. It was used only inside American Airlines at first.

1976: Travel agents get access

The same source says access was granted to travel agents in 1976, which created the GDS marketplace that travel professionals still use. Hotels joined as content on screens built for flights.

1987: Amadeus is founded

Amadeus was founded in 1987, owned at the start by a group of airlines, and in 2006 it changed its corporate name to Amadeus IT Group to reflect a move from distribution system to technology provider.

What it meant for vendors: distribution was a chain and corporate game. The buyer was a central reservations or brand team, connections were few and expensive, and independent hotels were largely outside the system. Selling distribution technology meant selling to head office.

Era 2: The OTAs arrive (1996 to 2005)

1996: Expedia and Bookings.nl start

Expedia was founded as a division of Microsoft in October 1996 and spun off as a public company in 1999. In the same year, a University of Twente student founded Bookings.nl, which became Booking.com after a merger in 2000.

2005: Priceline buys Booking.com

In July 2005 Booking.com was acquired by Priceline Group, now Booking Holdings, for $133 million, and merged with Active Hotels, which Priceline had bought for $161 million in 2004.

What it meant for vendors: for the first time, independent hotels could reach global demand without a brand. That opened a huge new market of small buyers, and it also created the cost that half of hotel tech now sells against. If your product promises direct revenue, the OTA era is your origin story, and the argument still works, as covered in why OTA commission pressure is your best sales argument.

Era 3: Channel managers and connectivity (2006 to 2016)

2006: SiteMinder and the channel manager

As OTAs multiplied, hotels had to update rates and availability on each one by hand. SiteMinder’s own history says the company was founded in 2006 by Mike Ford, who ran a hostel in Sydney, and Mike Rogers. Its channel manager let hoteliers manage 10+ OTA connections with inventory updated in real time. The next problem arrived fast: staff were re-keying OTA bookings into the PMS, so SiteMinder built a PMS integration system.

2007 to 2008: Booking engines join the stack

SiteMinder says it began looking at booking engines to integrate with in 2007 and 2008, found little good product that could connect, and built its own. By 2016 it reported more than 20,000 customers, 300 OTA connections and 200 PMS partners.

What it meant for vendors: this is the era where integrations became the product. A channel manager is only as good as its list of connections, and a PMS that did not talk to channel managers lost deals. Vendors started competing on partner pages as much as features, a pattern explained in why integrations sell hotel software more than features do. For a current view of that category, see the channel manager comparison for independent hotels.

Era 4: Metasearch and Google (2011 to 2021)

2011: Google Hotel Finder

In 2011 Google launched Hotel Finder as an early experiment for US hotels, reported by Peter Greenberg Worldwide. It followed Google’s $700 million acquisition of ITA flight search software that April. Hotel Finder linked to booking sites that were Google advertisers, and to hotel websites, with advertisers paying only when a user clicked a price listing.

2013: Expedia buys trivago

Metasearch became too important for the OTAs to leave alone. Expedia’s acquisition list on Wikipedia shows it bought trivago, a hotel metasearch engine, on 12 March 2013 for €477,000,000 in cash and stock.

2021: Free booking links

On 9 March 2021 Google made it free for hotels and travel companies to appear in hotel booking links, starting on google.com/travel. Until then those links came through Hotel Ads. Google also promised tools for individual hotels to provide rates directly, without complex technical requirements.

What it meant for vendors: metasearch turned rate accuracy into a sales point. Booking engines and channel managers began selling metasearch connectivity, often as a paid add on, and free booking links lowered the entry bar for small properties. The vendor who could get a hotel’s direct rate onto Google without work for the hotelier had a clear pitch.

Era 5: AI assistants and agents (2025 onwards)

January 2025: OTAs join OpenAI’s Operator

PhocusWire reports that in January 2025 Tripadvisor, Booking.com, Priceline, Uber and Hipcamp collaborated with OpenAI on the launch of Operator, its browsing agent.

6 October 2025: Apps in ChatGPT

At its developer conference OpenAI launched apps inside ChatGPT and named Expedia and Booking.com among the first partners, opening what PhocusWire called ChatGPT’s 800 million user base to third parties. The apps run on Model Context Protocol (MCP).

17 November 2025: Google previews agentic hotel booking

Google said it would make it possible to finish booking flights and hotels directly in AI Mode, and named Booking.com, Choice Hotels International, Expedia, IHG Hotels & Resorts, Marriott International and Wyndham Hotels & Resorts as partners.

27 August 2026: Hotel booking goes live in AI Mode

Google launched hotel booking in AI Mode in the US, with checkout via Google Pay and the hotel or booking platform acting as merchant of record. Listed partners include Booking.com, Expedia, Hilton, Hotels.com, IHG, Marriott, Priceline, Trip.com, Choice and Wyndham. PhocusWire adds that Google introduced its Universal Commerce Protocol in January with partners including Amadeus, and that results are not influenced by advertising for now. We covered the rules in more depth in how hotel tech vendors should prepare for Google’s AI booking.

What it meant for vendors: the first partners in both ChatGPT and Google are OTAs and big chains with their own engineering teams. Independent hotels will reach these agents through someone else’s connection, and that someone is likely to be a booking engine, channel manager, CRS or PMS vendor. Being the pipe an AI agent can read is the new version of being on the channel manager’s partner list. It also changes marketing: buyers now ask assistants which vendor to choose, which is why visibility in AI answers matters for your own pipeline.

The timeline at a glance

What the pattern tells hotel tech vendors

Three things repeat across all five eras. First, new channels are launched with the largest suppliers and aggregators, and the long tail of hotels follows through intermediaries. Second, each new channel creates an integration job that someone has to own. Third, the vendors that grew fastest sold the connection, not the channel itself.

So the practical questions for your roadmap and your pitch are simple. Which new endpoint can your product reach that your hotels cannot reach alone? Which partners do you need to build or partner with to get there? And can your sales team explain, in one sentence, how your product keeps a hotel visible to the next channel? Those answers belong in your positioning, your partner strategy and your messaging, which is the work the hotel tech GTM strategy guide walks through.

If you are not sure your story has kept up with where hotels now sell, a free GTM leak audit will show where your positioning still describes the last era instead of this one.

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