How many companies use Customer.io vs Mailchimp?

25 companies use Customer.io and 78,095 companies use Mailchimp in our database. Mailchimp is more widely adopted with 3123.8x more companies than Customer.io.

Can I get a list of companies using both Customer.io and Mailchimp?

Yes. AgentData tracks companies using both tools. Sign up free to access the full list with emails, tech stacks, and contacts via CSV or API.

Customer.io vs Mailchimp

Mailchimp is used by 78,095companies — 3123.8x more than Customer.io (25).

25 use Customer.io78,095 use Mailchimp

Side-by-side comparison

	Customer.io	Mailchimp
Companies	25	78,095
Category	email_marketing	Other

Company adoption

Top companies using Customer.io

Hisachaka.com

Beefreebeefree.io

HVGinfo.hvg.hu

PharmacyOS - PillPackpharmacyos.com

urllolinks.urllo.com

Top companies using Mailchimp

Emporiumchicagoemporiumchicago.com

Zig Websoftwarezigwebsoftware.nl

The Devon Hoteldevonhotel.co.uk

hcc hotelshcchotels.com

Fuel Cyclefuelcycle.com

Get the full comparison

78,120 companies with emails, tech stacks, and contacts

Start free →

1,000 lookups · API access · CSV exports

API access

GET /api/v1/tech?name=customer-io

From the makers of AgentData

DragApp

AI-powered shared inbox, help desk, and team collaboration — inside Gmail. 200K+ users.

Try DragApp free →

HeyHelp

AI email assistant inside Gmail. Drafts, sorts, follows up.

Try HeyHelp free →

Oneway

All-in-one customer platform — live chat, email, automations, changelogs & roadmaps with AI.

Try Oneway →

Related comparisons

Customer.io vs Google Tag ManagerCompare →Google Tag Manager vs MailchimpCompare →Cloudflare vs Customer.ioCompare →Cloudflare vs MailchimpCompare →Atlassian Jira vs Customer.ioCompare →Atlassian Jira vs MailchimpCompare →

View individually

Companies using Customer.io→

Companies using Mailchimp→

Frequently asked questions

Need this data via API?

Access technology comparison data programmatically via REST API or MCP.

API docs →