When was Zefr founded?

Zefr was founded in 2009 and raised its 1st funding round 4 years after it was founded.

Where is Zefr located?

Zefr is headquartered in Los Angeles, United States. It is registered at Los Angeles, California.

Who is the current CEO of Zefr?

Richard Raddon and Zach James s of Zefr. Richard Raddon has also founded 1 company.

How many employees does Zefr have?

As of Jul 31, 2026, the latest employee count at Zefr is 265.

Is Zefr a funded company?

Zefr is a funded company, having raised a total of $36.2M across 4 funding rounds to date. The company's 1st funding round was a $***** Seed round, raised on Jan 16, 2013.

When was the latest funding round of Zefr?

Zefr's latest funding was a $***** Series B round on Mar 08, 2016, with participation from 2 investors.

Where does Zefr rank among its competitors?

Zefr ranks 2nd amongst 33 active competitors, of which 5 are funded. It stands 2nd in terms of total funding among its competitors. The most recent competitor to raise funding was Vaudit, which secured $7.3M in Jul, 2025.

Who are the top competitors of Zefr?

Zefr's top competitors include DoubleVerify, Vaudit and Confiant. Among them, Vaudit secured the most recent funding round in July, 2025.

Zefr - 2026 Company Profile, Team, Funding & Competitors

Zefr is a series B company based in Los Angeles (United States), founded in 2009 by Richard Raddon and Zach James. It operates as a Provider of AI-powered content classification and brand suitability solutions. Zefr has raised $36.2M in funding from investors like IVP, USVP and MK Capital. The company has 33 active competitors, including 5 funded and 4 that have exited. Its top competitors include companies like DoubleVerify, Vaudit and Confiant.

Company Details

Provider of AI-powered content classification and brand suitability solutions. The company offers tools for pre-bid targeting, optimization, and post-campaign verification. Custom brand exclusions are available. It aims to enable digital advertising effectiveness while upholding brand and social responsibility values.

Website: zefr.com
Social
Email ID: *****@zefr.com
Registered Address: Los Angeles, California

Key Metrics

Founded Year

2009

Location

Los Angeles, United States

Stage

Series B

Total Funding

$36.2M in 4 rounds

Latest Funding Round

Series B, Mar 08, 2016, $*****

Investors

IVP & 11 more

Ranked

2^nd among 33 active competitors

Employee Count

265 as on Jul 31, 2026

Investment & Acquisitions

AdVerif.ai

Similar Companies

DoubleVerify & 42 more

View Zefr's full profile

Zefr is associated with 1 legal entity given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
ZEFR CIN: 943458703 , Belgium, Active	Dec 31, 1999	-	133 (As on Dec 31, 2022)	-

Zefr has raised a total funding of $36.2M over 4 rounds. Its first funding round was on Jan 16, 2013. Its latest funding round was a Series B round on Mar 08, 2016 for $*****. 2 investors participated in its latest round. Zefr has 12 institutional investors.

Here is the list of recent funding rounds of Zefr:

Filter this list

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Mar 08, 2016	2284937	Series B	8496783	1137872	5668591	4872481
Sep 19, 2014	5456470	Series B	7944802	9319990	1991815	8412236
Feb 28, 2014	9750431	Series B	8557640	5501470	IVP	USVP & 3 more

Access funding benchmarks and valuations. Sign up today!

View details of Zefr's funding rounds and investors

The founders of Zefr are Richard Raddon and Zach James. Richard Raddon and Zach James are the CEOs of Zefr.

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

Richard Raddon: Co-Founder & Co-CEO of Zefr and founder of 1 other company.
Contact Info: 1 email address
Zach James: Co-Founder & Co-CEO of Zefr and founder of 1 other company.

View details of Zefr's Founder profiles and Board Members

Zefr's employee count trend

Zefr has 265 employees as of Jul 26. Here is Zefr's employee count trend over the years:

Uncover Zefr'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 Zefr include DoubleVerify, Vaudit and Confiant. Here is the list of Top 10 competitors of Zefr, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	DoubleVerify 2008, New York City (United States), Acquired	Provider of media effectiveness platform utilising measurement data and dynamic optimisation	$396M	Tiger Global Management, JMI Management & 12 others	75/100
2nd	Zefr 2009, Los Angeles (United States), Series B	Provider of AI-powered content classification and brand suitability solutions	$36.2M	Archer Venture Capital, First Round Capital ... & 10 others	63/100
3rd	Vaudit 2024, San Francisco (United States), Seed	Provider of AI-powered digital advertising audit and charge removal platform	$8.55M	Mucker, Plug and Play Tech Center & 3 others	47/100
4th	Confiant 2013, New York City (United States), Series A	Ad security and quality platform protecting against malicious online attacks	$4.1M	Rubicon Venture Capital, Seed4Soft & 2 others	45/100
5th	Adelaide 2020, New York City (United States), Seed	Provider of media quality measurement to improve advertising campaign performance	$8.4M	AperiamVentures, Human Ventures & 4 others	42/100
6th	Adloox 2009, New York City (United States), Acquired	Platform offering ad verification software	-	-	41/100
7th	GeoEdge 2010, Petah Tikva (Israel), Unfunded	Ad verification	-	-	37/100
8th	AdXpose 2005, Seattle (United States), Acquired	Digital advertising quality and optimization	$13M	Ignition Partners, DFJ	33/100
9th	RealVu 2002, New York City (United States), Series A	Viewable impression ad serving and reporting technology leader	$9.12M	-	32/100
10th	Veenome 2011, New York City (United States), Acqui-Hired	Real-time video viewability Intelligence	$3.42M	Robert H Smith School of Business, Ecosystem Ventures ... & 5 others	30/100