Marketing Automation SoftwarePortland, OregonFounded 2012CEO Colin Nederkoorn
Customer.io is a SaaS messaging and marketing automation platform founded in April 2012 by Colin Nederkoorn and a co-founder he met while working in New York.
Customer.io's annual revenue was $100M in October 2025 (customer.io). That is up 43% from $70M a year earlier.
| As of | Revenue | Source |
|---|---|---|
| 2014 | $1M | Colin Nederkoorn on cameraWatch at 4:59 |
| Jun 2017 | $4.8M | – |
| Jun 2018 | $6M | – |
| Jun 2019 | $8.4M | customer.io |
| May 2021 | $18M | – |
| Jan 2022 | $30M | customer.io |
| Dec 2023 | $51.8M | – |
| Sep 2024 | $70M | SaaS Open |
| Oct 2025 | $100M | customer.io |
– source not recorded
Customer.io is privately held, so there is no Customer.io stock to buy. Investors valued it at $690M in its March 2022 Series A.
Customer.io has raised $40.3M across six rounds since 2012. The latest was a $35M Series A in March 2022.
| Date | Round | Raised | Valuation |
|---|---|---|---|
| Mar 2022 | Series A | $35M | $690M |
| Mar 2017 | Seed | $2.9M | – |
| Mar 2017 | Seed | $498K | – |
| Mar 2015 | Convertible Note | $1.5M | – |
| Jan 2013 | Seed | $150K | – |
| May 2012 | Pre-Seed | $250K | – |
| Total raised | $40.3M |
Nathan Latka has interviewed Customer.io once, speaking with Colin Nederkoorn. Each figure links to the second it was said.
Watch: How Customer.io Grew from $1M ARR to Millions in ARR and 250 Employees Over 12 Years (Talk by CEO Colin Nederkoorn)September 2024 · Colin Nederkoorn, Founder and CEO
Customer.io competes most directly with HubSpot, Klaviyo, ActiveCampaign and Intuit Mailchimp. It is the smallest of the five by revenue.
| Company | Revenue | Funding | Employees | Customers | Founded |
|---|---|---|---|---|---|
 HubSpot | $3.1B | $100.5M | 7,639 | 205K | 2006 |
 Klaviyo | $1.2B | $678.5M | 2,875 | 146K | 2012 |
 ActiveCampaign | $290.5M | $360M | 865 | 145K | 2003 |
 Intuit Mailchimp | $180.1M | – | 1,637 | 140M | 2001 |
| Customer.io | $100M | $40.3M | 250 | 2.9K | 2012 |
Colin Nederkoorn founded Customer.io in 2012 and runs it as CEO. Customer.io has 250 employees (2024).
Also at Customer.ioChad Hettinger, Morgan Kirchner, Kevin Jasmine, Martina Edwards, Glen Cornell, Bill De Lucia, Matthew Wensing, Kevin Kucharczyk, Rahul Chaki, Michelle Hancock, Sterling Beck, David Libin, Alexander Egurnov, Sarah Barrientos, Terance Brown, Ha'Monie Masso, Rahul Choudhary, Meenakshi Sharma, Trace Hammond, Stephen Y., Vikash Koushik, Ashley Ortega, Natalie Onions, Marcela Rodriguez, Alexis Cote, Ankita Bhattarai, Aditi Echandi, Pranav Kumar, Nick Perri, Afifa Jahan, Arianna Henkel, Jess Cvija, Johan Floch, Grace O'Hara, Soleha Leha, Jesse Harburn, Katie Cox, Symone Lapray, Borana Suci, Nick Young, Nelson Brandão, Scott Wittrock, Matt P., Kate White, Deborah Otuagomah, Alyleah Collins, Liam Quain, Aerie C., Francisco Soto, Stephen Pope, Maria D., Matt Frizzell, Ali Simmons, Soris Cox, Feyishayo Gbenle, Yasunaka Cho, Chris Bennett-Baggs, Kishore Devarasetty, Kristina Suhyun Im, Papu Kumar, Mehul Aghi, Shahroz Khan, Robert Campbell, Hannah Selonick Lutz, Liesl Schoenstein, Aiden Bordner, Carolina H., Saranyu Phusit, Billy McClennan, Loren Froomin, Gyan Prakash Karn, Daniel Stevens, Jasper Koolen, Danielle Hashimi-Chapellon, Tim N., Danielle Hipwell, Maria Culkin, Mike Bridges, Jon Pierce, Darlene Medeiros, Lars Theunissen, Bernard Gatt, Vinicius Araujo, Kendall Gibson, Yegor Kariaguine, Kelsi Rohrmann, Antony Tumwebaze, Chris Armstrong, Zane K., Mundir Zeroug, Michael Dunlap, James Newman, Amber Reuter, Nadim Laham
| As of | Employees | Source |
|---|---|---|
| 2024 | 250 | Colin Nederkoorn on cameraWatch at 18:53 |
| Dec 2023 | 305 | |
| Dec 2022 | 240 | |
| Mar 2022 | 151 | – |
| Dec 2021 | 141 | |
| May 2021 | 81 | – |
Customer.io brings in about $100M a year: its annual revenue was $100M in October 2025, according to customer.io.
Companies don't publish a net worth. The closest figure is Customer.io's valuation: $690M, set in Mar 2022.
Customer.io is privately held by its founders, employees and investors.
No. Customer.io is a private company, so its shares are not listed on a stock exchange.
$40.3M across 6 rounds; the latest was a $35M Series A in March 2022.
Colin Nederkoorn, a co-founder.
Colin Nederkoorn, in 2012.
About 250 as of 2024.
4 said on camera · 7 from public sources. Founder figures link to the second they were said; public figures name their source; estimates are marked EST. and say whose they are. Not financial advice.
Updated Oct 7, 2026Data disclaimerReport a correctionClaim this profile
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