The Zetter HotelvsThe Royal Horseguards
Both hotels are rated very highly by reviewers writing for major publications. On balance, The Zetter Hotel scores slightly better than The Royal Horseguards. The Zetter Hotel has a TripExpert Score of 88 with approval from 13 sources such as Mr & Mrs Smith, DK Eyewitness and Rough Guide.
The Zetter Hotel
 Rough Guide
 Michelin Guide
 Frommer's
 Concierge
 Fodor's
 Lonely Planet
 Time Out
 DK Eyewitness
 Condé Nast Traveler
 Gayot Show All Reviews 
86-88 Clerkenwell Road, London EC1M 5RJ
From $118/night
- Bar/Lounge
 - Free Internet
 - Room Service
 - Laundry Service
 - Concierge
 - Restaurant
 
 "A fixture on Clerkenwell’s laidback hipster scene. Rooms are simple but bold, with colourful panache and lots of eco touches." 
 "A trendy and discreet converted 19C warehouse with well-equipped bedrooms that come with pleasant touches, such as Penguin paperbacks." 
 "It was only a matter of time before a hotel blended the edgy Shoreditch scene with the creature comforts demanded by City types." Full review
 i 
Ask for a room at the rear of the hotel -- they back onto a quiet square.
 "Almost best of all, the rates are (for London) way low." 
 "The dizzying five-story atrium, Art Deco staircase, and slick European restaurant hint at the delights to come in this converted warehouse." Full review
 "The Zetter comprises two quite different properties, both exemplary in their execution." Full review
 "Zetter is a fun, laid-back, modern hotel with some interesting design notes." Full review
 "In an area known for its loft apartments, this is a loft hotel in a 19th-century warehouse." 
99.6
 "This Victorian warehouse turned 59-room hotel on London’s heavily trafficked Clerkenwell Road is missing nary a detail of what constitutes a cutting-edge big-city boutique hotel." Full review
 "This Clerkenwell lodging goes for ultrahip with its Champagne-and-camera-stocked vending machine, hot water bottles, second hand books and Scandinavian/industrial style." 
The Royal Horseguards
 Frommer's
 Time Out
 Star Service
 Gayot
 Zagat
 Forbes Travel Guide
 Oyster
 Condé Nast Traveler
 Condé Nast Traveler
2 Whitehall Court, London SW1A 2EJ
From $187/night
- Bar/Lounge
 - Free Internet
 - Room Service
 - Laundry Service
 - Concierge
 - Restaurant
 
 "Set in the grandeur of the one-time National Liberal Club, with sweeping views all along the Thames, the Royal Horseguards is fairybook London." Full review
 "It’s immaculately clean, ‘classic but modern’ in style, with welcoming staff." Full review
 "The Royal Horseguards is one of the best in its class, an upper-midrange commercial hotel geared to those seeking something unique, colored with history and Victorian decor." Full review
 "The Royal Horseguards Hotel Review: Between Whitehall and the River Thames, this stately building... still retains a private feel with a discreet rear entrance." 
 "Overlooking the Thames, this historic Victorian luxury hotel served as HQ for the Secret Service during World War I and has hosted many a statesman and politician over the years." 
 Recommended
 "Today, the hotel mixes old school elegance and modern panache—and is still the site of intrigue." Full review
Luxury
 "The 282-room Royal Horseguards offers classic Victorian architecture and modern amenities in a five-star luxury setting with views of the London Eye and the Thames River." Full review
 "Rebranding not happening..." Full review
 Readers' Choice Award
 "The biggest suites look right over the Thames, and the Embankment location means guests have some of the city's best sites—including Buckingham Palace and Westminster Abbey—a short walk away." Full review