When was AppNexus founded?

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

Where is AppNexus located?

AppNexus is headquartered in New York City, United States.

How many employees does AppNexus have?

As of Apr 30, 2026, the latest employee count at AppNexus is 78.

Is AppNexus a funded company?

AppNexus is a funded company, having raised a total of $319M across 10 funding rounds to date. The company's 1st funding round was a $2M Angel round, raised on 2007.

How much is AppNexus worth?

The last known valuation of AppNexus was $1.2B as of Aug 18, 2014.

When was the latest funding round of AppNexus?

AppNexus' latest funding was a $31M Series F round on Sep 30, 2016, with participation from 2 investors.

Is AppNexus a AdTech company?

The primary sector of AppNexus is AdTech.

Where does AppNexus rank among its competitors?

AppNexus ranks 3rd amongst 261 active competitors, of which 38 are funded. It stands 1st in terms of total funding among its competitors. The most recent competitor to raise funding was Topsort, which secured an undisclosed amount in Nov, 2025.

Who are the top competitors of AppNexus?

AppNexus' top competitors include Quantcast, The Trade Desk and Viant. Among them, Topsort secured the most recent funding round in November, 2025.

AppNexus - 2026 Company Profile, Team, Funding & Competitors

Q: Is AppNexus an acquired company?

AppNexus got acquired by AT&T on Jun 10, 2018.

Company Details

AppNexus offers an advanced programmatic advertising technology platform that provides trading solutions and powers marketplaces for Internet advertising. Serves major buyers and sellers of online advertising, including Microsoft Ad Exchange, Interactive Media (Deutsche Telekom) and Collective. AppNexus publisher's suite include SSP, AdServer, and Yieldex analytics. In addition to the DSP as the major offering, AppNexus also offers an ad exchange platform. Led by the pioneers of online ad exchanges at Yahoo!’s Right Media and Google’s DoubleClick, backed by Angel investors like Marc Andreessen, Ben Horowitz and Ron Conway.

Website: appnexus.com
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Key Metrics

Founded Year

2007

Location

New York City, United States

Stage

Acquired

Total Funding

$319M in 10 rounds

Latest Funding Round

Series F, Sep 30, 2016, $31M

Last Known Valuation

$1.2B as on Aug 18, 2014

Investors

TCV & 18 more

Ranked

3^rd among 261 active competitors

Employee Count

78 as on Apr 30, 2026

Investment & Acquisitions

Yieldex & 4 more

Similar Companies

Quantcast & 396 more

Exit Details

Acquired by AT&T (Jun 10, 2018)

View AppNexus' full profile

AppNexus is associated with 1 legal entity given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
Appnexus, Inc. CIN: 26-0894849 , United States, Active	Dec 31, 2006	-	925 (As on Dec 31, 2018)	-

AppNexus got acquired by AT&T on Jun 10, 2018 at an acquisition amount of $*****.

Click here to take a look at AppNexus's acquisition in detail

AppNexus has raised a total funding of $319M over 10 rounds. Its first funding round was on 2007. Its latest funding round was a Series F round on Sep 30, 2016 for $31M. 2 investors participated in its latest round. AppNexus has 18 institutional investors and 1 angel investor.

Here is the list of recent funding rounds of AppNexus:

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Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Sep 30, 2016	$31M	Series F	-	-	-	News Corp, Philippe Corrot
2015	Undisclosed	Series F	-	-	-	FJ Labs
Apr 01, 2015	$62.7M	Series F	-	-	-	-

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View details of AppNexus's funding rounds and investors

The founders of AppNexus is Mike Nolet.

Here are the details of AppNexus' key team members:

Mike Nolet: Co-Founder & CTO of AppNexus.

View details of AppNexus's Founder profiles and Board Members

AppNexus' employee count trend

AppNexus has 78 employees as of Apr 26. Here is AppNexus's employee count trend over the years:

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Top competitors of AppNexus include Quantcast, The Trade Desk and Viant. Here is the list of Top 10 competitors of AppNexus, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Quantcast 2006, San Francisco (United States), Acquired	AI powered data management platform	$61.7M	Founders Fund, Polaris Partners & 10 others	72/100
2nd	The Trade Desk 2009, Ventura (United States), Public	Provider of a platform for data-driven, omnichannel advertising campaign management	$82.5M	Fusion Global Capital, Western Alliance Bank ... & 21 others	70/100
3rd	AppNexus 2007, New York City (United States), Acquired	Full Stack Programmatic Advertising Technology	$319M	TCV, TriplePoint Capital & 17 others	68/100
4th	Viant 1999, Irvine (United States), Public	Provider of a demand-side platform for programmatic advertising solutions	$15.3M	HTIF, Kennet Partners & 1 others	67/100
5th	Topsort 2021, Cambridge (United States), Series A	Provider of an AI-powered platform for retailers to manage advertising businesses	$43.2M	Pear VC, Quiet Capital & 8 others	64/100
6th	Vertoz 2012, Mumbai (India), Public	Provider of MadTech and CloudTech platforms for digital advertising solutions	-	TCG	63/100
7th	AuDigent 2016, Philadelphia (United States), Acquired	Provider of data activation, curation, and identity platform for businesses	$27.8M	Ben Franklin Technology Partners, GO PA Fund ... & 17 others	63/100
8th	Matomy 2007, Tel Aviv (Israel), Public	Provides performance marketing solutions for publishers and advertisers	$18M	Viola Growth, Cyhawk Ventures & 2 others	62/100
9th	Centerfield 2011, El Segundo (United States), Acquired	Customer acquisition experts, driving growth for Fortune brands through digital solutions	-	Falcon Investment Advisors, H.I.G. Growth Partners ... & 2 others	60/100
10th	Turn 2004, Redwood City (United States), Acquired	Demand-side and data management platform	$160M	Shasta Ventures, Norwest & 11 others	59/100

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AppNexus has not made any investments yet. AppNexus has made 5 acquisitions.

Here is the list of latest three $acquisitions:

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Date of Investment/Acquisition	Type	Company Name	Founded Year	Location
Mar 18, 2015	Acquisition	Yieldex	2006	New York City (United States)
Dec 19, 2014	Acquisition	MediaGLU	2009	Baltimore (United States)
Dec 19, 2014	Acquisition	MLN Advertising	2011	Baltimore (United States)