When was OpenX founded?

OpenX was founded in 2007 and raised its 1st funding round within a year of its incorporation.

Where is OpenX located?

OpenX is headquartered in Pasadena, United States. It is registered at 207 REGENT STREET C/O LEGALINX LIMITED,3RD FLOOR,LONDON,ENGLAND,W1B 3HH.

How many employees does OpenX have?

As of Sep 30, 2026, the latest employee count at OpenX is 517.

Is OpenX a funded company?

OpenX is a funded company, having raised a total of $85M across 6 funding rounds to date. The company's 1st funding round was a $***** Series A round, raised on Jun 13, 2007.

When was the latest funding round of OpenX?

OpenX's latest funding was a $***** Series E round on Jan 17, 2013, with participation from 6 investors.

Where does OpenX rank among its competitors?

OpenX ranks 1st amongst 147 active competitors, of which 11 are funded. It stands 2nd in terms of total funding among its competitors. The most recent competitor to raise funding was Rembrand, which secured $37.5M in Nov, 2025.

Who are the top competitors of OpenX?

OpenX's top competitors include Magnite, PubMatic and Rembrand. Among them, Rembrand secured the most recent funding round in November, 2025.

OpenX - 2026 Company Profile, Team, Funding & Competitors

OpenX is a series E company based in Pasadena (United States), founded in 2007 by Tim Cadogan and Jason Fairchild. It operates as a Provider of programmatic advertising technology and supply side exchange platforms. OpenX has raised $85M in funding from investors like Accel, Index Ventures and DAG Ventures. The company has 147 active competitors, including 11 funded and 33 that have exited. Its top competitors include companies like Magnite, PubMatic and Rembrand.

Company Details

Provider of programmatic advertising technology and supply side exchange platforms. The company operates a marketplace for automated ad buying and inventory monetization. It offers software suites for curation, supply-side targeting, and deal creation. The infrastructure facilitates connections between publishers and demand partners through real-time bidding and data-driven decisioning tools. These solutions support audience targeting and yield management across digital media environments.

Website: www.openx.com/
Social
Registered Address: 207 REGENT STREET C/O LEGALINX LIMITED,3RD FLOOR,LONDON,ENGLAND,W1B 3HH

Key Metrics

Founded Year

2007

Location

Pasadena, United States

Stage

Series E

Total Funding

$85M in 6 rounds

Latest Funding Round

Series E, Jan 17, 2013, $*****

Investors

Accel & 31 more

Ranked

1^st among 147 active competitors

Employee Count

517 as on Sep 30, 2026

Investment & Acquisitions

Mezzobit & 3 more

Similar Companies

Magnite & 168 more

View OpenX's full profile

OpenX is associated with 3 legal entities given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Reports
Openx Technologies, Inc. CIN: 001t000000mTQc0AAG , United States, Active	Oct 13, 2021	-	-	-
Openx Software Limited CIN: 6038906 , United Kingdom, Active	Jan 01, 2007	-	-
Openx Technologies, Inc. CIN: 262651564 , United States, Active	May 14, 2008	-	176 (As on Dec 31, 2023)	-

OpenX has raised a total funding of $85M over 6 rounds. Its first funding round was on Jun 13, 2007. Its latest funding round was a Series E round on Jan 17, 2013 for $*****. 6 investors participated in its latest round. OpenX has 32 institutional investors.

Here is the list of recent funding rounds of OpenX:

Filter this list

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Jan 17, 2013	3032757	Series E	8910992	7358995	7503805	4360558
Mar 12, 2012	5895130	Series E	3914519	4251699	2797933	8766583
May 13, 2011	9959675	Series D	9343691	3163192	Sapphire Ventures	Presidio Ventures & 5 more

Access funding benchmarks and valuations. Sign up today!

View details of OpenX's funding rounds and investors

The founders of OpenX are Tim Cadogan and Jason Fairchild.

Here are the details of OpenX's key team members:

Tim Cadogan: Co-Founder of OpenX. They are also an angel investor in 3 startups.
Contact Info: 1 email address
Jason Fairchild: Co-Founder of OpenX and founder of 1 other company.
Contact Info: 1 email address

View details of OpenX's Founder profiles and Board Members

OpenX's employee count trend

OpenX has 517 employees as of Sep 26. Here is OpenX's employee count trend over the years:

Uncover OpenX's growth story! Sign up today!

Access Tracxn on any website

Our Google Chrome extension lets you view company details while browsing their websites

Install Tracxn Extension

Top competitors of OpenX include Magnite, PubMatic and Rembrand. Here is the list of Top 10 competitors of OpenX, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	OpenX 2007, Pasadena (United States), Series E	Provider of programmatic advertising technology and supply side exchange platforms	$85M	Sapphire Ventures, TriplePoint Capital & 30 others	74/100
2nd	Magnite 2011, Los Angeles (United States), Public	Platform offering SSP software	$45.7M	Advantas Capital Ventures, Sapphire Ventures ... & 2 others	72/100
3rd	PubMatic 2006, Redwood City (United States), Public	Provider of a platform for digital advertising supply chain management	$31M	Helion Venture Partners, Nexus Venture Partners ... & 6 others	70/100
4th	Rembrand 2022, Palo Alto (United States), Series B	Provider of AI-powered advertising solutions for in-content and social media	$68.5M	Greycroft, Superset & 8 others	68/100
5th	Brightcom 1999, Herzliya (Israel), Series D	Cross-device publisher side platform	$73M	ICICI Bank, Oak Investment Partners & 2 others	63/100
6th	Equativ 2001, Paris (France), Acquired	Equativ - Fulfilling the promise of adtech	-	Bridgepoint Group, Bridgepoint Capital & 2 others	62/100
7th	Sovrn 2006, Boulder (United States), Acquired	Platform offering SSP solution	$99.9M	Foundry, Boulder Ventures & 15 others	57/100
8th	YuMe 2004, Redwood City (United States), Acquired	Offers supply side and demand side platform	$84.7M	Khosla Ventures, Accel & 11 others	51/100
9th	Sonobi 2011, New York City (United States), Series B	Premium programmatic advertising technology company	$10.4M	Cohere Capital, Capital Southwest & 1 others	51/100
10th	Unruly 2006, London (United Kingdom), Acquired	Programmatic video supply-side platform	$25M	Endeit Capital, Amadeus Capital & 3 others	49/100

Get insights and benchmarks for competitors of 2M+ companies! Sign up today!

Looking for more details on OpenX's competitors? Click here to see the top ones

OpenX has not made any investments yet. OpenX has made 4 acquisitions.

Here is the list of latest three $acquisitions:

Filter this list

Date of Investment/Acquisition	Type	Company Name	Founded Year	Location
Sep 25, 2017	Acquisition	Mezzobit	2012	New York City (United States)
Sep 25, 2017	Acquisition	PubNation	2015	Washington, DC (United States)
Oct 29, 2012	Acquisition	JumpTime	2007	Los Angeles (United States)