OneSignal headquarters details
- Street address
- 2850 S Delaware St 201
- City
- San Mateo
- State / region
- California
- ZIP / postal code
- 94403
- Country
- United States
- Phone
- +1 408 506 0701
- Founded
- 2014
- Website
- onesignal.com
- linkedin.com/company/onesignal
Location map
Open in Google MapsAll OneSignal office locations
| City | State / region | Country | Type |
|---|---|---|---|
| San Mateo HQ | California | United States | Headquarters |
Showing the headquarters of 4 recorded locations. See every location in GraphIQ →
About OneSignal
OneSignal is headquartered in San Mateo, California, United States. Founded in 2014, the company has 4 recorded locations across 2+ countries and employs approximately 121 people worldwide.
Where is OneSignal's main office?
OneSignal's main headquarters office is located at 2850 S Delaware St 201, San Mateo, California 94403, United States. This is the company's primary corporate address.
OneSignal regional offices
Beyond its headquarters in San Mateo, OneSignal has recorded locations in United States and Philippines.
OneSignal contact information
The main switchboard for OneSignal headquarters can be reached at +1 408 506 0701. Official website: onesignal.com.
What does OneSignal do?
OneSignal, Inc. provides a customer engagement platform. The Company offers marketing tools including A/B testing, segment targeting, variable-substitution, localization, drip marketing, and conversion tracking solutions. OneSignal serves customers in the United States.
OneSignal competitors & similar companies
Frequently asked questions
Where is OneSignal headquarters?
OneSignal's headquarters is located at 2850 S Delaware St 201, San Mateo, California 94403, United States.
How many offices does OneSignal have?
GraphIQ records 4 locations for OneSignal across 2+ countries, as of October 2026.
What is OneSignal's corporate address?
The corporate headquarters address is 2850 S Delaware St 201, San Mateo, California 94403, United States.
When was OneSignal founded?
OneSignal was founded in 2014 and employs approximately 121 people.
What is OneSignal's phone number?
The main phone number for OneSignal headquarters is +1 408 506 0701.
How many employees does OneSignal have?
OneSignal has approximately 121 employees (GraphIQ estimate, 2026).