10/10
One of the best hotels I have stayed at. The staff were fantastic!! Nat was the best. He arranged everything we needed!
Bangkok · head to head
The Siam vs The St. Regis Bangkok
Priced on the same night, 2026-10-10: The St. Regis Bangkok is $223 a night less. They are 5.9 km apart.
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The honest take
Book The St. Regis Bangkok. It's $415 a night against The Siam's $551, rated 9.2 with 426 reviews compared to no guest rating and only 108 reviews for The Siam, and it sits on Rajadamri Road in the commercial core with butler service and a medical spa. The Siam's trump card is its riverside setting, a facility the St. Regis lacks entirely, and that alone might decide it for some travellers. But on price, review volume and address, the St. Regis is the stronger booking.
The look and the feel
The Siam
The Siam occupies a stretch of the Chao Phraya north of the old city, a compound of colonial-revival and art deco touches assembled by owners who collected Thai antiques and mid-century furniture rather than commissioning a single decorator's vision throughout. Rooms come with fireplaces and private indoor spa tubs, an odd, almost anachronistic pairing in tropical Bangkok that gives the place a slightly eccentric, houseguest-of-a-wealthy-family feel. The riverfront position is the real asset: boats passing, a pool that looks onto the water, a quieter, greener pocket of the city away from the malls and traffic. It draws a guest who wants seclusion and a sense of curated eccentricity over central convenience.
Travellers who want river views, seclusion and quirky, antique-filled rooms over being near the shopping districts.
The St. Regis Bangkok
The St. Regis sits on Rajadamri Road, steps from Lumphini Park and the elevated BTS line, in the commercial heart of the city rather than tucked along a riverbank. The interiors lean on warm colour, textured rugs and Thai artwork worked into a fairly classic St. Regis template of chandeliers, marble floors and a formal, hushed lobby, with butler service on every floor reinforcing the sense of old-world hotel ritual transplanted into a glass tower. The brand's signature rituals, the sabre-opened champagne, the tailored butler presence, give it a more theatrical, service-forward atmosphere than a design-forward one. It suits guests who want to be in the middle of Bangkok's shopping and business district with full-service polish on tap.
Travellers who want a central, service-heavy five-star base near Lumphini Park and the BTS with butler service included.
At $415 against $551, the St. Regis gives up direct waterfront access, which The Siam has and it doesn't; in exchange the cheaper St. Regis actually adds a hot tub and golf access The Siam lacks, so the trade here runs both ways rather than being a straightforward downgrade.
The Siam is the more characterful place to be, an idiosyncratic riverside compound with fireplaces and antiques rather than a polished corporate template, and that eccentricity is worth more to look at than the St. Regis's competent formality.
The numbers
| The Siam | The St. Regis Bangkok | |
|---|---|---|
| Price, same night | $644 | $421 |
| Guest rating | — | 9.2/10 |
| Reviews | 108 | 426 |
| Stars | ★★★★★ | ★★★★★ |
| Facilities on our list | 7 | 8 |
| Distance apart | 5.9 km |
What one has that the other doesn't
Only The Siam has
- Waterfront
Only The St. Regis Bangkok has
- Hot tub
- Golf
What guests actually say
The Siam
- attentive butler service
- stunning decor and villas
- excellent food and breakfast
- slow hot water and door access issues
The St. Regis Bangkok
- attention to detail
- room size and service
- service attention lacking discretion
“A little too Much attention. Sometimes good service is also about discretion.”
The Siam's guests come away happier, repeatedly praising attentive butlers, stunning decor and excellent food, while St Regis reviews are thinner and note service can feel intrusive.
Rooms & rates, 2026-10-10
The Siam
- Siam SuiteBreakfast Included$638
- Siam Suite(1 King Bed)Breakfast Included$638
- Suite King Size BedBreakfast Included$692
The St. Regis Bangkok
- Deluxe Room, 2 Double BedsRoom Only$421
- Deluxe Room, 1 King BedRoom Only$426
- Deluxe Room, 2 Double BedsRoom Only · free cancellation$426
In guests' own words
The Siam
10/10
“Honeymoon approved ”
This Resort was absolutely amazing. The service was outstanding. It was our Honeymoon annd I anm so happy I picked this hotel. Our Butler Zul was so attentive and kind. He anticipated our needs and reserved the hotel boat for us to and from where we wanted to go and we felt so safe. The breakfast was some of the best food my husband and I have had and the afternoon tea was delightful. The pool was wonderful and entir
10/10
“Missing Siam already”
The hotel was amazingly beautiful and well appointed. We stayed in a villa and it was heaven. Our butler was so helpful in making arrangements for the hotel boat to take us to our activities and gave us great recommendations on this to do. We misses him and the rest of the friendly hotel team the minute we left!
The St. Regis Bangkok
10/10
“Great stay from beginning to end. Excellent service. You know that you will be spoilt when you stay at St Regis.”
Attention to detail
A little too Much attention. Sometimes good service is also about discretion.
About each
The Siam
Luxurious Spa and Recreational Amenities Indulge in massages, body treatments, and facials at the spa. Enjoy the outdoor pool, sauna, and 24-hour fitness center for relaxation. Dining Options and Entertainment Savor Thai cuisine at Chon Restaurant or opt for 24-hour room service. Unwind at the bar/lounge, poolside bar, or coffee shop/cafe. Elegant…
Check-in — · Check-out 12:00 PM
The St. Regis Bangkok
Luxurious Accommodations Experience elegance at its finest at The St Regis Bangkok, located in the heart of Bangkok's commercial district. Each spacious room is adorned with warm colors, stylish rugs, and Thai artwork, offering a truly luxurious stay. World-Class Amenities Indulge in pampering at Clinique La Prairie Aesthetics & Medical Spa or enjoy…
Check-in — · Check-out 12:30 PM
Facilities, in full
The Siam
- Elevator
- Fitness facilities
- Free airport transportation
- Supervised childcare/activities
- ATM/banking
- Shopping on site
- Conference space
- Library
- Free breakfast
- Safe-deposit box at front desk
- Free newspapers in lobby
- Porter/bellhop
- Express check-out
- Limo or town car service available
- Full-service spa
- Internet access in public areas - high speed
The St. Regis Bangkok
- Fitness facilities
- WiFi available
- Free WiFi
- Parking
- Free Parking
- Non-smoking rooms
- Air conditioning
- Fitness center
- Swimming pool
- 24-hour front desk
- Restaurant
- Room service
- Business center
- Terrace
- Family rooms
- Garden
Where they are
3/2 Thanon Khao, Vachirapayabal, Bangkok, Bangkok, 10300159 Rajadamri Road
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Rates are live for 2026-10-10, one night, two guests, fetched together so the two are comparable. Facilities and reviews are from each hotel's own listing. The honest take is written by our AI from the listing, the reviews and what is widely known about each hotel. HotelDupe earns a commission if you book, which never changes the verdict. All comparisons