If there’s one thing an Israeli cannot bear to be called, it’s freier – Hebrew for “sucker.” And in one area of business suckers are born every minute: booking a flight or hotel room.

Two new Tel Aviv startups have taken the freier risk out of travel.

FairFly  has built software that searches the web for the best airfare after you’ve booked your ticket. If the price drops more than $50 or five percent, whichever is greater (factoring in any cancellation fees you’ll have to pay), FairFly will alert you and even rebook the flight at the new, lower price.

RoomsNinja does the same for hotel rooms. Like FairFly, all you have to do is forward them a copy of your electronic booking and RoomsNinja will scan 45 partner wholesaler websites, several times a day. If the price drops, the savings is passed along with RoomsNinja doing the heavy lifting of cancelling and rebooking.

FairFly was founded in 2013 by three students at the Zell Entrepreneurship Program at Herzliya’s Interdisciplinary Center (IDC) who had the good fortune to be mentored by Waze co-founder Uri Levine.