Born in Saint Petersburg. Studied with Antonina Kazarina at the conservatory of her native city and with Michael Frischenschlager at the University of Music and Performing Arts in Vienna as well as with Pavel Vernikov at the Vienna Conservatory. Master classes with Zakhar Bron, Wolfgang Marschner, Pavel Vernikov, and Igor Oistrakh. Awarded prizes at the International Louis Spohr Competition for Young Violinists in Weimar (1998), the Premium Yuri Temirkanov in Saint Petersburg (1999), the Tchaikovsky Competition in Moscow (2002), the Louis Spohr Violin Competition in Freiburg im Breisgau (2003), and the Fritz Kreisler Competition in Vienna (2010) as well as the Concorso Internazionale Valsesia Musica in Italy (2011). Has performed with orchestras in China, Russia, Germany, Finland, Slovenia, and Switzerland and worked with such conductors as Vladimir Fedoseyev, Yuri Temirkanov, and Saulius Sondeckis. Invited to perform at the Usedom Music Festival, the Kissinger Summer, the Gergiev Festival in Rotterdam, and the International Orpheum Music Festival for the Advancement of Young Soloists held in Zurich. Regularly performs as a chamber musician in a duo with pianist Vesselin Stanev.
Since November 2015 Ekaterina Frolova is a member of the first violins section of the Vienna State Opera and Vienna Philharmonic Orchestra. She plays an instrument made by Nicola Gagliano in 1755.