SIENNAX headquarters details
- Street address
- 6-8 Stroombaan
- City
- Amstelveen
- State / region
- Provincie Noord-Holland
- ZIP / postal code
- 1181 VX
- Country
- The Netherlands
- Phone
- +31 20 547 8000
- Founded
- 1998
- Website
- siennax.com
- linkedin.com/company/siennax
Location map
Open in Google MapsAll SIENNAX office locations
| City | State / region | Country | Type |
|---|---|---|---|
| Amstelveen HQ | Provincie Noord-Holland | The Netherlands | Headquarters |
Showing the headquarters of 2 recorded locations. See every location in GraphIQ →
About SIENNAX
SIENNAX is headquartered in Amstelveen, Provincie Noord-Holland, The Netherlands. Founded in 1998, the company has 2 recorded locations across 2 countries and employs approximately 125 people worldwide.
Where is SIENNAX's main office?
SIENNAX's main headquarters office is located at 6-8 Stroombaan, Amstelveen, Provincie Noord-Holland 1181 VX, The Netherlands. This is the company's primary corporate address.
SIENNAX regional offices
Beyond its headquarters in Amstelveen, SIENNAX has recorded locations in The Netherlands and United States.
SIENNAX contact information
The main switchboard for SIENNAX headquarters can be reached at +31 20 547 8000. Official website: siennax.com.
What does SIENNAX do?
During the course of the past nine years, Siennax has established itself as one of Europe's leading enterprise ASPs. Siennax supplies a range of solutions for the support and execution of processes in the field of training, e-commerce and purchasing. In addition, it places its eco-system for ASP services to software suppliers keen to offer their products as a service. Siennax is Europe’s sole Trust Services-certified Service Provider, which has also been SAS 70 type II certified since the close of 2006. This serves as an external guarantee to clients and other interested parties that Siennax’ systems and processes are suitably secure and that all of the necessary IT-controls are both available and effective in providing assurances in the field of integrity and availability.
Frequently asked questions
Where is SIENNAX headquarters?
SIENNAX's headquarters is located at 6-8 Stroombaan, Amstelveen, Provincie Noord-Holland 1181 VX, The Netherlands.
How many offices does SIENNAX have?
GraphIQ records 2 locations for SIENNAX across 2 countries, as of October 2026.
What is SIENNAX's corporate address?
The corporate headquarters address is 6-8 Stroombaan, Amstelveen, Provincie Noord-Holland 1181 VX, The Netherlands.
When was SIENNAX founded?
SIENNAX was founded in 1998 and employs approximately 125 people.
What is SIENNAX's phone number?
The main phone number for SIENNAX headquarters is +31 20 547 8000.
How many employees does SIENNAX have?
SIENNAX has approximately 125 employees (GraphIQ estimate, 2026).