21 Casino Review (2025) — Ranked #514 in the United Kingdom

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GS Rank

#514 of 244

Monthly Traffic

102.4k

Moderately Popular

We categorize casinos by estimated monthly popularity — from newcomers to industry leaders — to give you a quick view of how well-known and visited each one is.

Popularity Categories	Monthly Visits Range
Barely Known	0 – 999
Little Known	1,000 – 9,999
Emerging	10,000 – 49,999
Moderately Popular	50,000 – 199,999
Growing Fast	200,000 – 999,999
Popular	1,000,000 – 4,999,999
Very Popular	5,000,000 – 14,999,999
Top Tier	15,000,000 – 29,999,999
Super Popular	30,000,000 – 59,999,999
Legendary	60,000,000+

+19.25%

+16,527

Website:: www.21casino.com

Opened Since:: 2015

Services:: Casino

Number of Slots:: 2268

Licences:: United Kingdom (UKGC), Malta (MGA)

Game Providers:: 1x2Gaming, 2 By 2 Gaming, Adoptit, Asylum Labs, Bally, Barcrest Games, Betdigital, Big Time Gaming, BlaBlaBla Studios, Blueprint Gaming, Bulletproof Gaming, Cayetano Gaming, Chance Interactive, Concept Gaming, CrazyTooth Studio, ELK, Evolution Gaming, Fantasma Games, Felt Gaming, Foxium, Fuga Gaming, Games Warehouse, Genesis Gaming, High 5 Games, Inspired, Just For The Win, Kalamba Games, Leander Games, Lightning Box, Live 5 Gaming, Magic Dreams, Merkur, Meta Games Universal, Microgaming, Multicommerce Game Studio, NetEnt, Nyx Interactive, Old Skool Studios, Play N Go, Pragmatic Play, Probability Jones, Push Gaming, Quickspin, Rabcat, Realistic Games, Red 7, Red Tiger Gaming, Reflex Gaming, Relax Gaming, Seven Deuce, SG Gaming, SHFL Entertainment, Sigma Games, Spieldev, Stakelogic, Sthlm Gaming, Storm Gaming, SUNFOX Games, Thunderkick, Wazdan, Wild Streak, WMS (Williams Interactive) + 52 more (less)

Currencies:: ARS, BRL, CAD, CLP, EUR, GBP, INR, NOK, NZD, PEN, USD + 1 more (less)

Payment Methods:: Bank Transfer, instaDebit, Maestro, MasterCard, MuchBetter, Neteller, Paysafe Card, Skrill, Visa

The casino impresses with its modern, easy-to-navigate design and smooth registration process, creating a seamless experience for UK players. While the KYC verification initially delayed withdrawals, payouts became much faster afterwards—typically processed within 24 hours. Multiple secure payment options, including e-wallets, make transactions quick and convenient.

The site features an extensive selection of slots, live dealer tables, jackpots, and classic games, supplied by renowned developers such as Evolution, NetEnt, Microgaming, and NextGen. Licensed by both the UK Gambling Commission and the Malta Gaming Authority, and audited by iTech Labs, the platform guarantees fairness and player protection. Although ongoing promotions are limited, the customer support team stands out for its professionalism and fast response times. Overall, this casino offers a safe, efficient, and well-structured gaming environment that UK players can trust.

Remember: the house always has the edge. Treat gambling as fun, not income. Luck can change in a moment — play moderately, wisely, and never beyond your means.

Anything incorrect or missing?

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