Santa Ana-based Meritus Payment Solutions has agreed to be acquired for $210 million by Optimal Payments PLC, an online payment services provider with headquarters in London.

Optimal Payments said it’s paying $150 million in cash and $60 million in shares of its common stock.

Meritus provides various payment services, including credit card and gift card processing, mobile payments and telephone orders.

It had $74.4 million in 2013 revenue, up 94% year-over-year. Profit before tax was $1.1 million last year, up about 57%.

The Business Journal ranked Meritus No. 4 on its 2011 list of the fastest growing private companies based in Orange County. Meritus had an estimated 700% increase in annual revenue from 2009 to 2011, to $25.3 million.

Shares of Optimal Payments, which is publicly traded on the London Stock Exchange, rose by 6% today on the acquisition announcement.

The company also is in a deal for Los Angeles-based Global Merchant Advisors Inc. for $15 million.