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SlateIndex

Customer.io

New

Customer Engagement Platform For Better Outcomes

Marketing AutomationPortland, Oregon, USA201–500 employeesFounded 2012

#8 of 46 in Marketing Automation11,000 customers (per customer.io)34% positive in AI answers

Track this brand Visit websiteCompare alternatives
Visibility score
12.2%
New vs last week
Weekly run · Nov 2

Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run

  • Customer.io ranks #8 of 46 in Marketing Automation with an AI visibility score of 12.2 (SlateIndex, Nov 2, 2026).
  • Customer.io is most visible on Perplexity (18.9) and least on Google AI Mode (4.4).
  • AI engines name Customer.io in 21 of the 60 Marketing Automation buyer prompts SlateIndex tracks.
  • zapier.com is the source AI engines cite most in answers about Customer.io, with 23 citations.

About

Company details for Customer.io

Customer.io is a customer engagement platform for creating personalized journeys across email, push, SMS, and in-app messaging. It uses customer data to trigger and personalize messages, with a visual workflow builder, data-driven audience segmentation, and an AI Agent that builds automations from a prompt. It connects to data sources and destinations through integrations, APIs, webhooks, and an MCP server for AI tools. It ranks #8 of 46 in Marketing Automation on SlateIndex and has a visibility score of 12.2 in the latest weekly run.

Founded in 2012 and headquartered in Portland, Oregon, USA, the company employs 201–500 people. Its differentiator: one platform for every channel and message type, with an AI Agent that turns a single prompt into a fully configured automation.

Company size
201–500 employees
Headquarters
Portland, Oregon, USA
Founded
2012
Company type
Private, venture-backed
Funding
Series A led by Spectrum Equity
Customers
11,000 · per customer.io
Pricing
$100 / mo · usage-based
Free trial
—
Deployment
Cloud-hosted, with US and EU data centers
Compliance
GDPR, CCPA, ISO 27001, SOC 2 Type II, HIPAA
Support
Email and chat support, Documentation and community support, Dedicated Customer Success Manager on Enterprise
LinkedIn · linkedin.com/company/customer-ioX (Twitter) · twitter.com/customerioGitHub · github.com/customerioYouTube · youtube.com/channel/UCkCaWdezRoa8ZyR9pEVaipAInstagram · instagram.com/customer.io/

Read from linkedin.com, customer.io, capterra.com, getlatka.com · refreshed Nov 2, 2026.

AI visibility

Latest weekly run · Nov 2 · next run Nov 9

Visibility score
12.2%
across Marketing Automation answers, weighted by position
ChatGPT13.3%
AI Mode4.4%
Perplexity18.9%
Change
New
vs last week’s run
Category rank
#8 of 46
in Marketing Automation
Mentions
23
in this week’s run
Share of voice
4%
of AI mentions in Marketing Automation

Visibility score trend

Weekly runs over the last 60 days, with up to 7 competitors. Click a name to hide or show its line.

Now12.2%
30-day change—
High · low12.2% · 12.2%
Rank#8
0%25%50%75%100%Nov 2Customer.io 12%

Changes appear after the second weekly run in Marketing Automation. HubSpot leads the category at 73.1%.

Media

Website and product screenshots for Customer.io

All media
Home page
Pricing page

AI mentions & citations

Recent answers that name Customer.io

All prompts

Best marketing automation platform for startups

Customer.io — Best for product-led (PLG) startups wanting behavior-led messaging.

Google AI Mode · run of Nov 2

Top marketing automation platform options for B2B SaaS companies

Customer.io is better for product-led, event-driven SaaS; Marketo Engage or Salesforce Account Engagement fit larger organizations with complex revenue operations.

Perplexity · run of Nov 2

Top marketing automation platform options for B2B SaaS companies

For B2B SaaS companies, the strongest marketing automation platforms are HubSpot, Adobe Marketo Engage, Salesforce Marketing Cloud Account Engagement, Customer.io, and ActiveCampaign.

ChatGPT · run of Nov 2

Best marketing automation platform for startups

ChatGPT · run of Nov 2

What are the best marketing automation tools in 2026?

Customer.io — Best for SaaS and product-led companies.

Perplexity · run of Nov 2

Best marketing automation platform for startups

Choose Customer.io if activation, onboarding, retention, and product events drive your lifecycle marketing.

Perplexity · run of Nov 2

Best marketing automation platform with AI features

Choose Customer.io if your product generates detailed behavioral or event data.

Perplexity · run of Nov 2

How do I choose a marketing automation platform for a mid-market team?

ChatGPT · run of Nov 2

Products & features

What Customer.io sells

Journeys

Automated campaigns with a visual workflow builder that improve with every send.

Audiences

Data-driven segmentation to reach the right people.

Data & integrations

Customer data used for personalization, with reverse ETL, data index and connected forms.

Design Studio

Drag-and-drop and code editor for creating messages at scale.

Analytics

Campaign reporting, dashboards, A/B testing and conversion tracking.

AI Agent

Builds automations in a conversation and analyzes campaign performance.

Strengths engines cite

  • Strong behavioral and event-driven automation
  • Well suited to product-led SaaS companies
  • Supports onboarding, activation and retention messaging
  • Frequently shortlisted as a top marketing automation choice

Target market & buyers

Product-led companies and brands that message customers from behavioral data.

Notable customers include Notion, WIN Reality, ZEN.COM, StuDocu.

IndustryPrimary use case
SaaSRetaining and engaging users and turning them into product advocates.
MarketplaceBuilding personalized campaigns and nurturing customer relationships.
EdTechData-driven, personalized messaging strategies.
FinTechBuilding customer trust through personalized messaging.
HealthcarePersonalized engagement while protecting patient privacy.

Funding & recent developments

Funding

RoundYearAmount
Pre-seed2012—
Seed2013—
Seed2014$1M
Convertible note2015—
Seed2017—
Seed2017—
Regulation CF crowdfunding on Republic2021$5M
Series A led by Spectrum Equity2022—
Latest known roundTotal raised
Series A led by Spectrum Equity—

Recent developments

  1. Dec 2025ProductRedesigned help and support sidebar

    The help and support sidebar in the product was redesigned.

  2. Nov 2025ProductHIPAA-compliant messaging added to the product

    HIPAA-compliant messaging was added to the Customer.io product.

  3. Oct 2025CompanyCEO announces $100M ARR milestone

    Co-founder and CEO Colin Nederkoorn announced that Customer.io crossed $100M in annual recurring revenue, serving more than 8,000 customers.

Competitive landscape

How Customer.io compares with its top three alternatives

All alternatives

Customer.io most often appears alongside HubSpot, ActiveCampaign, Brevo in AI answers.

vsCustomer.io vs HubSpot12.2% vs 73.1% visibility · HubSpot leadsFull comparison vsCustomer.io vs ActiveCampaign12.2% vs 44% visibility · ActiveCampaign leadsFull comparison vsCustomer.io vs Brevo12.2% vs 41.2% visibility · Brevo leadsFull comparison
BrandVisibilityShare of voicevs last weekStarting price
Customer.io12.2%4%New$100 / mo
HubSpot73.1%13.1%NewFree plan
ActiveCampaign44%9.3%NewContact sales
Brevo41.2%9.9%NewFree plan
Salesforce46.2%9.6%NewPricing not available

What AI answers say

Sentiment and themes from the answers that mention this brand

Reviews

Positive 34% · Neutral 44% · Mixed 22% of 32 engine answers that mention Customer.io

Praised for

  • Strong behavioral and event-driven automation
  • Well suited to product-led SaaS companies
  • Supports onboarding, activation and retention messaging
  • Frequently shortlisted as a top marketing automation choice

Criticised for

    Pricing

    Usage-based pricing

    Full pricing
    Essentials$100month, billed monthly (starts at, 5k profiles)
    Premium$1,000month, billed yearly (starts at)
    EnterpriseCustomcontact sales

    Cite as: SlateIndex, “Customer.io AI visibility profile”, https://slateindex.ai/brand/customer-io, data of Nov 2, 2026. Licence: CC BY 4.0.