Rfinex is a centralized cryptocurrency exchange providing trading pairs based on ETH, USDT coins, as well as FNB and CNST tokens. The company is a part of RFintech PLC. 

Cryptocurrency Exchange

RightBTC is a centralized cryptocurrency exchange and professional asset management service covering USDT, BTC and ETH markets. 

Ripple China is the Ripple Gateway that was established in 2013 in China. The current status of this service is uncertain. The company’s website is still live.

RippleFox is the payment gateway launched in 2014. With its help, one can buy and sell Ripple and XLM for the fiat currency, CNY. 

Robinhood is a zero commission US based broker, a financial and technology startup. The company was founded in 2014 and is a member of FINRA. Robinhood is designed with newbies in mind, with no commission trading, a simple registration process, and an intuitive interface. No account minimum means newbies can open an account with no upfront investment and purchase fractional shares for as little as $ 1 apiece.

Multichain DeFi platform Rubic organizes DeFi services to enable a project to create, manage, and trade tokens decentralized in ONE PLACE.
Rubic's goal is to add multichain p2p trades to existing services and develop other products such as liquidity pools and make it simple and user friendly. Each of the blockchains has its own advantages and Rubic's goal is to give users the opportunity to use the advantages of each of the blockchains to solve the problems that they face.

RuDEX is a Decentralized cryptocurrency exchange based in the N/A. The exchange was launched in 2017. Its reported volume is about 0 $ as for 8 October 2019.
RuDEX has 19 available trading pairs and 11 coins. Deposits are on the exchange.
RuDEX doesn't have Fiat deposits option. Margin trading opti...

Being relatively new, Safe Currency is a UK-based broker that launched in 2018 and offers its exchange services worldwide.

SafeTrade is a multi cryptocurrency exchange platform developed by the SafeCoin team. It enables users with the ability to trade (buy/sell) cryptocurrencies between them using the respective available trading pairs.

Safello was founded in 2013, with the aim to bring cryptocurrencies to the masses.

Satang Pro is the Thai cryptocurrency exchange offering crypto-to-THB (Thai Baht) trading services. It is operated by Satang Corporation Co., Ltd., Bangkok. The word “satang” denotes a fraction of Thai Bath. 
Satang Pro is a hosted service. Thai, English, and Chinese are the website’s languages. Customers can earn a referral bonus within the platform. 
Customer service is available by phone and email. Satang Pro applies the AML and KYC policies. 

Cryptocurrency exchange trading alt coins in BTC, ETH, USDT, SATX and DOGE pairs. SatoExchange brings reasons for traders to be fully involved in active crypto-trading.

At Europe's top rated cryptocurrency trading platform.

Scalpex Crypto derivatives exchange

A trusted, secure and semi-fully decentralized crypto exchange

Cryptocurrency exchange

Stellar is an open-source, decentralized payment protocol that allows for fast, cross-border transactions between any pair of currencies.

Shakepay allows Canadians to buy/sell bitcoin and pay their friends.

ShapeShift was founded by Eric Voorhees in 2014. Online exchanger based in the Swiss town of Geneva. The main function is the quick conversion of bitcoin and popular altcoins with the highest possible protection of transactions. The peculiarity of the exchange is that client assets are not stored on the site itself. And this, undoubtedly, increases the security of the service, although it somewhat impoverishes the functionality. You can find more information on the ShapeShift team and the project here.