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. Customer.io is #62 on the Latka List, level with 19 others. The list ranks the 1,356 companies Nathan Latka has interviewed by revenue.
| 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 had 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, 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, Kendall Gibson, Kelsi Rohrmann, Nadim Laham, Alex Heurich, Daniel Hackley, James Levenson, Quentin Lassalle, Tatiana Favelevic, Alyssa Goold, Daniela Hernandez, Nitin Singh, Jake Meyers, Molly Evola, Lauren Turner-Roden, Alison El-Feraly Douglas, Shannon Utter, A. Shakuri Oguhebe, Sam Helferich
| 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's annual revenue was $100M in October 2025, according to customer.io.
Investors valued Customer.io at $690M in its March 2022 Series A.
Customer.io has raised $40.3M across six funding rounds. The latest was a $35M Series A in March 2022.
No. Customer.io is a private company, so its shares aren't traded on a stock exchange.
Customer.io had 250 employees in 2024, as Colin Nederkoorn said on camera.
Colin Nederkoorn is the CEO of Customer.io and founded the company in 2012. Nathan Latka interviewed Colin Nederkoorn in September 2024.
Colin Nederkoorn founded Customer.io in 2012.
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. The Latka List ranks the private, operating companies Nathan Latka has interviewed by the latest revenue figure on each profile, reported or estimated; equal figures share a rank.
Updated Oct 7, 2026Data disclaimerReport a correctionClaim this profile