The Claro Company, or simply Claro, is a Brazilian-founded Latin American telecommunications company, part of América Móvil, a Mexican telecom group. Claro serves customers in Argentina, Brazil, Chile, Colombia, Costa Rica, the Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Puerto Rico and Uruguay. Its Mexican operations are branded as Claro Mexico. The company's name means "bright," "clear," and also "of course," in both Portuguese and Spanish.

Headquartered in Córdoba, Argentina, Claro was launched in Argentina, Paraguay and Uruguay on March 25, 2008 in a rebranding of CTI Móvil. As of 31 March 2007^[update] the former served more than 12.8 million subscribers on CDMA/1XRTT and GSM/GPRS/EDGE wireless.^{[citation needed]}

CTI Móvil purchased Hutchison Telecom operation in Paraguay (which operated as "PortHable") in July 2005 to begin serving customers in that country. As of 2006, Claro competed with international operators such as Tigo (Millicom), Personal (Telecom Argentina-Telecom Italia) and VOX (formerly KDDI. VOX was acquired in 2011 by the state landline company, COPACO). In these countries, the company used slogans such as "Es simple. Es Claro." ("It's simple. It's clear") and "Claro es Internet móvil de alta velocidad." ("Claro is high-speed mobile Internet.")

In Brazil, Claro was launched in 2003 with the merger of América Móvil-owned operators ATL (serving the states of Rio de Janeiro and Espírito Santo), BCP (with service in São Paulo metropolitan area, Pernambuco, Alagoas, Ceará, Paraíba, Piauí and Rio Grande do Norte), Americel (operating in Acre, Tocantins, Rondônia, the Distrito Federal, Goiás, Mato Grosso, Mato Grosso do Sul), Tess Celular (other areas of São Paulo state) and Claro Digital (serving Rio Grande do Sul).

Claro later expanded its service to the states of Bahia, Sergipe, Santa Catarina, Paraná and Minas Gerais. As of 2012, the provider has over 260 million active mobile telephony connections and a mobile penetration of over 130%. With competitor Vivo, Claro was one of two operators to introduce the iPhone 3G in Brazil, with TIM participating later. Claro Brazil also runs a pay-tv service, Claro TV. Slogans used by the Brazilian branch include "Nós escutamos" ("We listen") and "Escolha" ("Choose"). Artur Carvalho Caravante - CEO

Claro Chile was originally known as Chilesat PCS, which later renamed to Smartcom PCS. Claro was launched in Chile on August 6, 2006, after its acquisition of Smartcom PCS. Slogans such as "Yo soy Claro, y me gusta." ("I am Claro, and I like it.") have appeared in advertisements.

In the mobile operator segment, Claro is third in market share behind Movistar and Entel.

While Claro has developed a large market share in Colombia, data for prepaid customers indicates that Claro has lost market share to competing providers Tigo and Movistar; this may be due to Claro's position as the most-expensive per-minute provider in the country's prepaid market. Tigo and Movistar offer prepaid customers flat-rate per-minute plans for calls placed to all mobile service providers and landlines within Colombia (229 and 199 pesos per minute, respectively). The cheapest per-minute rate for Claro prepaid customers is 249 pesos per minute, a rate valid for only nine "preferred Claro numbers". Per-minute rates increase for calls to Claro numbers not on a customer's "preferred" list and all calls to other cellphone providers or landline numbers.