When was Customer IO founded?

Customer IO was founded in 2012 and raised its 1st funding round 1 year after it was founded.

Where is Customer IO located?

Customer IO is headquartered in New York City, United States. It is registered at New York, New York, United States.

Who is the current CEO of Customer IO?

Colin Nederkoorn of Customer IO. They have also founded 1 company and are an angel investors in 1 startup.

How many employees does Customer IO have?

As of Apr 30, 2026, the latest employee count at Customer IO is 535.

Is Customer IO a funded company?

Customer IO is a funded company, having raised a total of $38.8M across 6 funding rounds to date. The company's 1st funding round was a $***** Seed round, raised on Jan 25, 2013.

When was the latest funding round of Customer IO?

Customer IO's latest funding was a $***** Series A round on Mar 08, 2022, with participation from 2 investors.

What is the annual revenue of Customer IO?

Annual revenue of Customer IO is $23.6M as on Dec 31, 2021.

Where does Customer IO rank among its competitors?

Customer IO ranks 9th amongst 414 active competitors, of which 55 are funded. It stands 8th in terms of total funding among its competitors. The most recent competitor to raise funding was Constant Contact, which secured an undisclosed amount in Oct, 2025.

Who are the top competitors of Customer IO?

Customer IO's top competitors include Freshworks, Constant Contact and Weave. Among them, Constant Contact secured the most recent funding round in October, 2025.

Customer IO - 2026 Company Profile, Team, Funding & Competitors

Customer IO is a series A company based in New York City (United States), founded in 2012 by Colin Nederkoorn and John Allison. It operates as a Cloud based platform offering software for email marketing. Customer IO has raised $38.8M in funding from investors like Spectrum Equity, FJ Labs and Oregon Venture Fund. The company has 414 active competitors, including 55 funded and 64 that have exited. Its top competitors include companies like Freshworks, Constant Contact and Weave.

Company Details

Cloud based platform offering software for email marketing. It enables businesses to send emails to their website visitors and customers based on their behavior. It tracks visitor behavior and allows the user to send rule-based emails for marketing purposes. Manual emails can be sent to the right segments of people and A B testing is also enabled on the site. It's currently being used by more than 450 customers. The business runs on a freemium model with subscriptions based on the number of users targeted. David Cohen is an Angel investor.

Website: customer.io
Social
Registered Address: New York, New York, United States

Key Metrics

Founded Year

2012

Location

New York City, United States

Stage

Series A

Total Funding

$38.8M in 6 rounds

Latest Funding Round

Series A, Mar 08, 2022, $*****

Investors

Spectrum Equity & 14 more

Ranked

9^th among 414 active competitors

Annual Revenue

$23.6M as on Dec 31, 2021

Employee Count

535 as on Apr 30, 2026

Investment & Acquisitions

Parcel

Similar Companies

Freshworks & 540 more

View Customer IO's full profile

Customer IO is associated with 2 legal entities given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
Peaberry Software Inc. CIN: 0001619078 , United States, Active		$23.6M (As on Dec 31, 2021)	165 (As on Dec 31, 2021)	-
PEABERRY SOFTWARE INC. CIN: 454421845 , United States, Active	Jan 29, 2012	-	170 (As on Dec 31, 2024)	-

Customer IO has raised a total funding of $38.8M over 6 rounds. Its first funding round was on Jan 25, 2013. Its latest funding round was a Series A round on Mar 08, 2022 for $*****. 2 investors participated in its latest round. Customer IO has 15 institutional investors.

Here is the list of recent funding rounds of Customer IO:

Filter this list

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Mar 08, 2022	9889680	Series A	5932261	2031744	9293860	1188248
Aug 10, 2021	9581163	Series A	2338209	3770545	2902126	8017704
Mar 21, 2017	8711303	Seed	7207337	4350984	Oregon Venture Fund	1717057

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View details of Customer IO's funding rounds and investors

The founders of Customer IO are Colin Nederkoorn and John Allison. Colin Nederkoorn is the CEO of Customer IO.

Here are the details of Customer IO's key team members:

Colin Nederkoorn: Co-Founder & CEO of Customer IO and founder of 1 other company. They are also an angel investor in 1 startup and serve on the board of 1 company.
Contact Info: 1 email address
John Allison: CoFounder, Board Member, CTO Emeritus of Customer IO.

Customer IO's Board of Directors

Customer IO's board has 2 active members. Colin Nederkoorn and John Allison are independent board members.

Here is the list of Customer IO's board of directors:

Name	Type	Representing	Status	Duration
Colin Nederkoorn	Independent board member	-	Current	11y 5m
poffvkd	Independent board member	-	Current	8y 8m

View details of Customer IO's Founder profiles and Board Members

Customer IO's employee count trend

Customer IO has 535 employees as of Apr 26. Here is Customer IO's employee count trend over the years:

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Top competitors of Customer IO include Freshworks, Constant Contact and Weave. Here is the list of Top 10 competitors of Customer IO, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Freshworks 2010, Chennai (India), Public	Provider of IT service management and customer support solutions	$400M	Accel, Tiger Global Management & 9 others	84/100
2nd	Constant Contact 1998, Waltham (United States), Acquired	Digital marketing platform for businesses	$37M	Siris Capital, El Toro Capital Management ... & 14 others	80/100
3rd	Weave 2008, Provo (United States), Public	Omnichannel customer engagement software for businesses	$156M	Catalyst Investors, A.Capital Ventures & 26 others	73/100
4th	HighLevel 2016, Eugene (United States), Series C	Text messaging platform for marketing agencies	$60M	PeakEquity, BAMCAP & 1 others	66/100
5th	Mapp 1999, San Diego (United States), Acquired	Customer engagement and marketing solution for businesses	$13M	oconnorcapital.ca, Marlin Equity Partners	65/100
6th	ExactTarget 2000, Indianapolis (United States), Acquired	Multichannel marketing automation platform	$229M	Greenspring Associates, Scale Venture Partners ... & 10 others	65/100
7th	Windfall 2016, San Francisco (United States), Series B	AI based platform offering omnichannel marketing solutions	$100M	Bullpen Capital & 11 others	62/100
8th	Act-On 2008, Portland (United States), Series E	Provider of a platform for marketing automation, analytics, and lead generation	$92.7M	TCV, Norwest & 8 others	61/100
9th	Customer IO 2012, New York City (United States), Series A	Cloud based platform offering software for email marketing	$38.8M	Spectrum Equity, Seven Peaks Ventures & 13 others	52/100
10th	Tracksuit 2021, Auckland (New Zealand), Series B	Provider of analytical solutions for the healthcare industry	$43.5M	VMG Partners, Altos Ventures Management & 13 others	55/100