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Companies using Customer.io

We found 2,635 companies that use Customer.io. 1,675 of them name it in their own job posts, and the rest through employees' public profiles. Hiring for it is growing, with 1,646 job posts naming it from October 2025 to August 2026. It comes up most in Lifecycle Marketing job posts.

Data as of November 9, 2026 · Markdown version

Which companies name Customer.io in the most job posts?

Saleshandy, APPLY and Columbia Road are among the companies with the most job posts naming Customer.io. Three of these five companies are in Scientific and Technical Services.
Company Posts People Recent job post
Saleshandy Scientific and Technical Services · first seen Aug 2023 59 0 "Product Marketing: Mixpanel, Customer.io"seo executive, Jan 15, 2026
APPLY Professional Services · first seen Apr 2023 48 2 "…(OneTrust), and ensure PII is handled correctly across CRM/MarTech data integrations (Customer.io, Twilio Segment)."bi engineer (data analyst), Oct 28, 2026
Columbia Road Professional Services · first seen Aug 2023 42 0 "…Cloud, Hubspot, Pardot, Marketo, Eloqua, Exponea/Bloomreach, Customer.io, Braze"crm consultant, Aug 7, 2026
Gorgias Scientific and Technical Services · first seen Sep 2023 38 1 "Outreaches and Initiatives: Candu, Customer.io, Guideflow, PromptLayer"Senior Lifecycle Growth Manager, Jul 29, 2026
SOFTSWISS Scientific and Technical Services · first seen Dec 2023 29 5 "Creating and improving multi-channel campaigns (email, SMS, in-app) using Customer.io"Retention Specialist - Middle, May 22, 2026
Showing 1 to 5 of 1,675 companies with job posts Sign up to see all companies using Customer.io ›

What else do we know about Customer.io?

Is hiring for Customer.io growing?

Hiring for Customer.io is growing. 0.94 in every 10,000 job posts named it from June to August 2026, against 0.84 from March to May. July 2026 was its highest month since October 2025, at 1.1.
Share of job posts naming Customer.io by month, October 2025 to August 2026, in job posts in every 10,000 Moves from 0.76 in October 2025 to 0.93 in August 2026, in job posts in every 10,000. 1.2 0.91 0.61 0.30 0 0.93 Oct '25 Nov Dec Jan '26 Feb Mar Apr May Jun Jul Aug
Show the data
MonthJob posts naming Customer.ioAll job postsPer 10,000
Oct 20251071,413,6730.76
Nov 20251181,822,1190.65
Dec 20251001,236,1030.81
Jan 20261671,828,0020.91
Feb 20261801,856,6470.97
Mar 20261461,850,7110.79
Apr 20261531,728,8860.88
May 20261531,821,5090.84
Jun 20261601,909,4960.84
Jul 20261921,815,1801.1
Aug 20261701,835,6980.93

How many companies named Customer.io in a job post for the first time in recent months?

Customer.io showed up in job posts at 179 companies for the first time from June to August 2026, and 156 in the three months before. The 179 from June to August are 11% of all 1,675 companies whose job posts name it.
March to May 2026 156
June to August 2026 179
October 2025 to August 2026 583

Companies whose first job post naming it appeared in that period. Recruiters, staffing firms and job boards are left out.

How do we know which companies use Customer.io?

1,675 of the 2,635 companies name Customer.io in their own job posts. 175 show up in both job posts and employees' profiles.
How we know Companies Share
Job posts name Customer.io
1,675 64%
Employees' profiles list Customer.io
960 36%

2,635 companies. Each is counted once, under the strongest evidence we have for it.

What size are the companies that use Customer.io?

Smaller companies stand out among Customer.io users: companies with fewer than 50 employees are 36% of them, against 22% on the typical tech page. 167 of its companies have more than 5,000 employees.

Share of its companies Typical tech page

ShareTypical
Under 50 employees
36% 22%
50 to 999
49% 38%
1,000 to 5,000
8.7% 17%
Over 5,000
6.3% 23%

Where are Customer.io companies based?

Beyond the United States (43%), Customer.io is unusually common in Australia, at 3.2% of its companies. Its companies are based in 91 countries and territories.
ShareTypical
United States
43% 43%
United Kingdom
8.6% 6.4%
France
5.1% 4.6%
Germany
4% 4.4%
Canada
3.8% 3.6%
Australia
3.2% 2.2%

Companies in 91 countries and territories. Shares are of companies with a known headquarters country.

Show the data
CountryCompaniesShareTypical tech page
United States1,07243%43%
United Kingdom2128.6%6.4%
France1265.1%4.6%
Germany984%4.4%
Canada943.8%3.6%
Australia783.2%2.2%

Which teams work with Customer.io?

At 111 companies, the team named in Customer.io job posts is marketing, at least twice the next. Next come growth teams (51 companies) and CRM teams (39).
Team Companies
Marketing
111
Growth
51
CRM
39
Lifecycle marketing
27
Product
27
Growth marketing
22

What else do Customer.io companies use?

Iterable, PostHog and Braze show up far more often at Customer.io companies than at companies of the same size. Hightouch comes fourth, 37 times as common as usual, at 5.5%.

Share of the 1,550 Customer.io companies counted here whose job posts also name the tool Typical for companies the same size

Tool Also name it Typical Times as common
Iterable 378 companies
24% 0.4% 62x
PostHog 172 companies
11% 0.19% 59x
Braze 603 companies
39% 1% 38x
Hightouch 85 companies
5.5% 0.15% 37x
Tool Also name it Typical Times as common
Ashby 125 companies
8.1% 0.23% 36x
Amplitude 532 companies
34% 1.1% 30x
Mixpanel 579 companies
37% 1.3% 30x
Retool 103 companies
6.6% 0.24% 27x

Which companies started naming Customer.io in job posts recently?

Between April and August 2026, Customer.io appeared for the first time in job posts at 140 companies: 129 commercial, 6 mid-market and 5 enterprise. Sleep Country Canada and Leadtech Group lead the new commercial companies, with 4 job posts each from April to August.
AI native any size · 18 new
Company Posts
ClearGrid 2
Augment Code by Harness 2
Subquadratic 2
Guild.ai 2
Consuma 2
Commercial 50 to 999 employees · 129 new
Company Posts
Sleep Country Canada 4
Leadtech Group 4
Maven Clinic 3
Jusbrasil 3
Plusgrade 3
Mid-market 1,000 to 5,000 employees · 6 new
Company Posts
Learning Care 1
Match Group 1
eDreams ODIGEO 1
Dandy 1
Prima 1
Enterprise over 5,000 employees · 5 new
Company Posts
Santander 2
Amazon Web Services (AWS) 1
FLEETCOR 1
Teladoc Health 1
Datavant 1

Companies that named Customer.io in a job post for the first time between April and August 2026, ranked by their job posts in those months. AI-native companies get a group of their own, whatever their size. Recruiters and job boards are left out.

Which roles mention Customer.io most?

Lifecycle Marketing job posts naming Customer.io grew the fastest among its top roles: 140 from June to August 2026, up from 86 from March to May. The top four roles cover 47% of these job posts.
Role Share Posts
Lifecycle Marketing
24% 388
Growth Marketing
9.8% 162
Revenue Operations
9.2% 152
Marketing
4.4% 73
Marketing Operations
3.8% 62
Product Marketing
3.5% 57
Show the data
RoleShareOct 2025 to Aug 2026Mar to May 2026Jun to Aug 2026
Lifecycle Marketing24%38886140
Growth Marketing9.8%1625049
Revenue Operations9.2%1524344
Marketing4.4%731725
Marketing Operations3.8%621915
Product Marketing3.5%571622

Which project themes come up in Customer.io job posts?

Beyond general digital transformation, the most common project theme in Customer.io job posts is Data Infrastructure Migration (30 posts). After that comes Generative AI, with 19.
Project theme Job posts
Digital Transformation 106
Data Infrastructure Migration 30
Generative AI 19
Cloud Cost Optimization 10
About this data

Sumble built this page. Sumble gives sales, marketing and other GTM teams technographics and hiring signals for the companies they sell to: the technologies each company uses, which teams are hiring and for what, and who reports to whom. That helps a team know who to contact, why now, and what to say.

Sumble covers more than 3.6 million companies, 93 million job posts collected since 2022 and 194 million employee profiles, and tracks more than 37,000 technologies. It finds which technologies a company uses by reading its job posts and its employees' public profiles.

Sumble has a free plan, and the same data is available through its API and MCP server.

A company counts when its own job posts or its employees' public profiles name the technology. Hiring is that technology's share of all job posts collected each month. Quotes are copied word for word from the companies' job posts.

Every figure on this page comes from Sumble's own analysis, and you won't find it outside Sumble.