Contact Us

Ontotext AD
a company of Sirma Group Holding
Europe Polygraphia Office Center fl.4, 47A Tsarigradsko Shosse, Sofia 1504, Bulgaria
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North America

116 W 23rd Street, Suite 500, New York, NY 10011

40550 Banshee Drive, Leesburg, Virginia 20175

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: +1.443.253.6810 (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: Tony Agresta, tony.agresta AT
Twitter @ontotext
Sirma Group Holding
Australia and New Zealand Please contact our exclusive regional partners Semantrix