Contact Us

Ontotext AD
a company of Sirma Group Holding
Europe Polygraphia Office Center fl.4, 47A Tsarigradsko Shosse, Sofia 1124, Bulgaria
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North America 116 W 23rd Street, Suite 500, New York, NY 10011
United Kingdom Burleigh House, 28 Tavistock Street, Covent Garden, London WC2E 7PB, UK
(shared with System Simulation Ltd.)
Phone Europe: +359 2 974 61 60
North America: +1.646.378.8317 (Toll Free: +1 866 972 6686)
Fax +359 2 975 32 26
E-mail General Inquiries: info AT
U.S. Support: support.usa AT
U.S. Contact: Victor Penev, victor.penev AT
Twitter @ontotext
Sirma Group Holding
Australia and New Zealand Please contact our exclusive regional partners Semantrix