Papa Murphy's, a business based in Vancouver, Washington, United States, is a take-and-bake pizza company.
 It began in 1995 as the merger of two take-and-bake pizza companies: Papa Aldo's Pizza (founded in 1981) and Murphy's Pizza (founded in 1981).
 The company and its franchisees operate more than 1,300 outlets in the United States and Canada.
 Papa Murphy's is the fifth-largest pizza chain in the United States.
Blackjack Pizza is a Colorado-based pizza delivery chain founded in 1983 by a former Domino's Pizza employee, Vince Schmuhl, because Domino's Pizza was the only major pizza delivery company in the Rocky Mountain region and he thought customers would appreciate an alternative.
 The pizza chain is the largest in Colorado with 800 employees, some of whom work part-time.
 On January 1, 2013, Blackjack Pizza was acquired by Askar Brands.
Chicago Franchise Systems, Inc. franchises operates Italian-based Chicago-style restaurants in Illinois, Georgia, California and Missouri which specialize in Chicago-style cuisine They have operated since 1990, when they took over the popular Nancy's Pizza chain of pizzerias.
 Nancy's itself was started in 1971 by Nancy and Rocco Palese, a couple who claims to have invented the concept of stuffed pizza.
 Today, there are 36 Nancy's locations in Chicago metropolitan area, as well as two location in the Atlanta, Georgia area, and one in the Los Angeles, CA area.
 CFS, Inc. operates Al's Beef, a popular Italian beef restaurant that is extremely well known in downtown Chicago and is regarded as one of the best beef sandwiches in the country.
 CFS, Inc. just launched Doughocracy Pizza + Brews, a fast casual pizza place that gives customers the "Freedom to Choose" their own toppings on a hand stretched pizza crust that can be paired with local craft beers.
 There are two Doughocracy restaurants, one in Geneva, Illinois and one in University City, Missouri, a suburb of St. Louis.
Freshslice Pizza is a Canadian franchised pizza chain in restaurants located throughout British Columbia, and one location in Toronto as of 2016.
 The first restaurant opened in 1999 in Vancouver, British Columbia.
 Today, Freshslice Pizza is the second-largest pizza chain in British Columbia behind Panago in terms of locations open.
Cassano's Pizza King, currently operating under the brand Cassano's, is a pizzeria chain based in Kettering, Ohio, a suburb of Dayton.
 Established on June 4, 1953, by the Kettering grocer Victor "Vic" J. Cassano, Sr. (June 4, 1922 – January 1, 2002) and his mother-in-law Caroline "Mom" Donisi, the company currently (2005) operates 34 Cassano's Pizza King restaurants in the Dayton area, and has three other western Ohio franchises (in Russells Point, Fairfield and Sidney), plus a franchise in Quincy, Illinois, and another in Hannibal, Missouri.
 The company also operates dozens of Cassano's Pizza Express kiosks in gas stations, convenience stores and hotels, and sells frozen pizza dough under the name Cassano's Fresh Frozen Dough Company.
Peppes Pizza is a Norwegian pizza chain that serves American style and Italian style pizza.
 Peppes is the largest pizza chain in Scandinavia.
 The restaurant was founded by two Americans, Louis Jordan and his wife Anne from Hartford, Connecticut.
 The restaurant chain is part of Umoe Catering As which consists of restaurants such as Burger King, TGI Fridays, La Baguette and Cafe Opus.
 Peppes Pizza is one of the first restaurants that brought foreign food to Norway.
 9 million pizzas are served by Peppes each year with deliveries in 11 cities in Norway.
 Their menu was first put online in March 1995.
 The servings have been described as enough for two people and that the pizza chain is "a cut above the rest".
Sir Pizza is an United States chain of pizza restaurants.
 Wendell Swartz opened the original restaurant in Lafayette, Indiana in 1957 under the name of Pizza King.
 Sir Pizza was incorporated in 1965.
 In 1966, Robert Swartz, Wendell's brother, expanded Pizza King outside of Indiana under the name of "Sir Pizza".
 In Indiana, they are franchised under the "Pizza King" name, one of two chains in Indiana using that name.
Mazzio's Corporation is the parent company of Mazzio's Italian Eatery and the former parent company of Zio's Italian Kitchen.
 In November 2007, Zio's Italian Kitchen was sold to a private company.
Pizza delivery is a service in which a pizzeria or pizza chain delivers a pizza to a customer.
 An order is typically made either by telephone or over the internet to the pizza chain, in which the customer can request pizza type, size and other products alongside the pizza, commonly including soft drinks.
 Pizzas may be delivered in pizza boxes or delivery bags, and deliveries are made with either an automobile, motorized scooter, or bicycle.
 Customers can, depending on the pizza chain, choose to pay online, or in person, with cash, credit or a debit card.
 A delivery fee is often charged with what the customer has bought.
Rabbe Anders Grönblom (May 3, 1950 Helsinki, Finland – June 29, 2015) was a Finland-Swedish businessman who started a successful pizza business in Vaasa, Finland.
 His first company—a pizzeria—was called "O sole mio" and it was founded in 1976 in the center of Vaasa.
 From there he expanded to a pizza franchise chain first called "Pizzeria N:o 1".
 He was known as the "Pizza-emperor" (Pizzakeisari in Finnish), because he was the founder of a well known pizza franchise chain called Kotipizza which was the new name of "Pizzeria N:o 1" which expanded fast outside of Vaasa.
 The chain is said to be the biggest one in the Nordic countries.
 He was also the founder of a shipping company called RG Line, a hotel chain called Omenahotelli and another pizza chain called Golden Rax Pizzabuffet.
 Most of his companies are subsidiaries of Grönblom International LTD, where Rabbe Grönblom acted as director.
 Golden Rax Pizzabuffet however is nowadays a part of Finland's largest hotel & restaurant company Restel Oy Ltd, where Rabbe Grönblom sat on the board.
 He was also on the board of the Finnish tyre company Nokian Renkaat (since 2003).

Question: Which pizza chain, Cassano's Pizza King or Mazzio's is still in operation today?
Answer: Cassano's Pizza King