Perion is an Israel-based ad-tech company providing engagement and monetization solutions for web and mobile based digital businesses. Their headquarters are in Holon, Israel, with offices in San Francisco, New York City, Boston, Chicago, Washington DC, Los Angeles, Atlanta, Milan, Hamburg, Düsseldorf, Paris and Barcelona.

Perion was formerly IncrediMail, an email company founded in 1999 by cousins Yaron and Ofer Adler. Soon after its founding, they raised $3.3 million from private and institutional sources and IPOed on NASDAQ in January 2006. They listed on the Tel Aviv Stock Exchange in 2007.

Perion was managed by its original founders until August 2010, when Josef Mandelbaum was appointed CEO. Mandelbaum had previously been CEO of American Greetings Interactive, the internet branch of American Greetings. In August 2011 Perion acquired the Redmond-based Smilebox for $32 million. Smilebox is an application for creating slideshows and other digital photo albums.

In November 2011 they changed the company name to Perion, the Hebrew word for productivity. In November 2012 Perion purchased Israel-based SweetPacks (aka SweetIM) for approximately $41 million. SweetPacks produced a variety of downloadable content for everyday use. In January 2014, they acquired Conduit’s ClientConnect business in an all-stock transaction valued at $660 million.

In June 2014, Perion acquired San Francisco based GrowMobile. In February 2015, Perion acquired Paris-based MakeMeReach - a social media advertising platform. After their move to Holon, Perion Network incorporated CSR policies into their corporate strategy. 2% of its net profits is donated and all employees are permitted to spend up to 40 hours per year volunteering in the community.

In December 2015, Perion acquired the digital advertising company Undertone for $180 million. In January 2017, Perion announced the appointment of new CEO Doron Gerstel, effective April 2017, followed by the announcement of Josef Mandelbaum stepping down from the company. Later in the year, the company's unit MakeMeReach was named as a Snapchat Partner.

Undertone helps brands engage consumers through cross-screen and digital ad experiences. CodeFuel allows developers to generate revenue using search syndication. MakeMeReach is a social media marketing tool to help advertisers grow demand for their brand on Facebook, Twitter, Instagram & Snapchat. The mobile and desktop apps are IncrediMail, an email program and Smilebox, a desktop and mobile app for customizing and animating photos.