Customer.io

customer.io

information technology & services

customer.io

Portland, Oregon, United States

201-500 employees

70000000 revenue

LinkedIn Profile

About Customer.io

marketing, analytics, customer retention, user retention, email marketing, email, sms, push notifications, lifecycle marketing, customer engagement, remote work, inapp messages, cdp, customer data, marketing automation, customer data platform, behavioral messaging, saas, big data analytics, enterprise software

Customer.io's Tech Stack

AI/ML

71 technologies detected · 9 decision makers · Emails available

Sales Outreach Angle

WordPress as a CMS signals a content-driven or SMB digital presence. SEO tools, hosting solutions, and page-builder plugins are natural fits for outreach.

Customer.io's Position in the StackWho Database

• Customer.io is 1 of 194,140 information technology & services companies tracked in StackWho.
• 193,618 information technology & services companies in our database have verified decision-maker emails (100% of the cohort).
• 3,285 companies in Oregon are in the StackWho database.
• 4,373 information technology & services companies are in the 201-500 employee range (same size as Customer.io).

Technology detection from public web signals. Decision-maker contacts compiled from LinkedIn public profiles, company filings, and verified outbound testing. Methodology & sources · Updated August 2026.

Frequently Asked Questions

What technology does Customer.io use?

Customer.io uses Route 53, Amazon SES, Gmail, Google Apps, MailChimp SPF, Microsoft Office 365, and 65 more technologies. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at Customer.io?

StackWho has verified email addresses for 9 decision makers at Customer.io. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach Customer.io directly for sales, recruiting, or partnerships.

What industry is Customer.io in?

Customer.io operates in the information technology & services industry, headquartered in Portland, Oregon, United States. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export Customer.io's contact data?

Yes. StackWho Pro members can export decision maker contact data for Customer.io and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.