RailEurope is the beneficiary of Klook's first significant foray into the West, with a partnership for customers to buy products on their respective websites.
The train platform is a popular tool for travelers making bookings on the Europe's myriad of operators, as well as the main seller of the Eurail unlimited travel pass and individual country-wide tickets.
Klook's partnership was signed in late-2018 and unveiled this week.
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The deal is a two-way partnership: On Klook, users get access to RailEurope's network of tickets, and on RailEurope, attractions as products are included to buy alongside rail tickets.
The deal is significant for Klook as it looks to branch out into global markets, securing a partnership in arch rival GetYourGuide's own backyard.
Klook is now the most heavily funded tours and activities startup in history, notching up just under $300 million in investment so far after its latest - a $200 million round - in August 2018.
GetYourGuide is no stranger to the world of big money, as well, having held the most heavily funded accolade until Klook's most recent round. It brought in $75 million in November 2017 - giving it a $170 million war chest.
Klook’s chief operating officer and co-founder, Eric Gnock Fah, says: "This partnership, and the extensive services it provides to our customers, will further solidify our standing as one of the world's leading in-destination platforms with rail being a key pillar.
"Seeing a tremendous success of Klook’s rail experiences in Japan, Korea, and Taiwan, we are excited to pioneer technological innovations in European rail services.
"These efforts reinforce our mission as a one-stop booking platform for travelers to discover and book in-destination experiences of all kinds.”
* Check out our interview with Anita Ngai, chief revenue officer at Klook, during the Arival 2018 event in Las Vegas.
PhocusWire @ Arival 2018 - Klook on living up to expectations