Ontotext headquarters details
- City
- Sofia
- State / region
- Sofia-Grad
- Country
- Bulgaria
- Phone
- +359 2 974 6160
- Founded
- 2000
- Website
- ontotext.com
- linkedin.com/company/ontotext-ad
Location map
Open in Google MapsAll Ontotext office locations
| City | State / region | Country | Type |
|---|---|---|---|
| Sofia HQ | Sofia-Grad | Bulgaria | Headquarters |
Showing the headquarters of 12 recorded locations. See every location in GraphIQ →
About Ontotext
Ontotext is headquartered in Sofia, Sofia-Grad, Bulgaria. Founded in 2000, the company has 12 recorded locations across 2+ countries and employs approximately 150 people worldwide.
Where is Ontotext's main office?
Ontotext's main headquarters office is located at Sofia, Sofia-Grad, Bulgaria. This is the company's primary corporate address.
Ontotext regional offices
Beyond its headquarters in Sofia, Ontotext has recorded locations in Bulgaria and United States.
Ontotext contact information
The main switchboard for Ontotext headquarters can be reached at +359 2 974 6160. Official website: ontotext.com.
What does Ontotext do?
Ontotext is a software company that produces software relating to data management. Its main products are GraphDB, an RDF database; and Ontotext Platform, a general data management platform based on knowledge graphs. It was founded in 2000 in Bulgaria, and now has offices internationally. Together with the BBC, Ontotext developed one of the early large-scale industrial semantic applications, Dynamic Semantic Publishing, starting in 2010.
Frequently asked questions
Where is Ontotext headquarters?
Ontotext's headquarters is located at Sofia, Sofia-Grad, Bulgaria.
How many offices does Ontotext have?
GraphIQ records 12 locations for Ontotext across 2+ countries, as of October 2026.
When was Ontotext founded?
Ontotext was founded in 2000 and employs approximately 150 people.
What is Ontotext's phone number?
The main phone number for Ontotext headquarters is +359 2 974 6160.
How many employees does Ontotext have?
Ontotext has approximately 150 employees (GraphIQ estimate, 2026).