More than 500,000 verified hotel reviews now feature on the Travel Republic website.
The number of reviews is increasing exponentially, with more than 120,000 reviews added since the start of the year.
This comes as the online agency claims two million customers are now booking each year from the UK, Ireland, Germany, Spain and Italy.
As well as hotel reviews, customers have submitted more than 300,000 ‘top tips’, with advice for other holidaymakers on how to make the most of their breaks.
The hotel with the highest number of perfect ‘10-out-of-10’ ratings is the Costa Adeje Gran Hotel in Tenerife. The property has an overall average of 8.6 out of 10.
The most-reviewed hotel is the Sol Pelicanos Ocas in Costa Blanca – setting for the TV series Benidorm – which has attracted more than 1,250 reviews. The hotel is rated 7.8 out of 10.
Only reviews from verified customers are accepted. They are provided with a secure login to submit a review after returning from their hotel.
“This means that only 100% authentic, independent ratings are included, in contrast to other well-known hotel review sites,” Travel republic claims.
Chief executive Kane Pirie said: “We pride ourselves on putting our customers at the heart of everything we do and featuring reviews you can trust from fellow travellers is a great example of that.
“With more than half of our bookings coming from repeat customers or recommendations, we aim to ensure that holidaymakers have a great time, every time.”