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About

Customers are bombarded with messages every day, and most go ignored. Customer.io is a customer engagement platform designed for tech-savvy organizations to create personalized customer journeys that engage, convert, and scale. Fueled by first-party data, teams can manage and tailor their customer messages across all channels, including email, in-app, push, SMS, and webhooks – all within one intuitive platform. Today, 7,400+ brands trust their messaging needs with Customer.io, and G2 recently recognized us as a Best Software award winner in the Marketing and Digital Advertising Products category. Customer.io’s suite of products includes Journeys, a messaging automation tool, Data Pipelines, a customer data platform; and Parcel, a code editor designed for email. Founded in 2012, Customer.io is a globally distributed, remote-first company named one of the fastest-growing private companies on the 2024 Inc. 5000 list.

About

SendroAI brings a new era of Email Campaign Intelligence by combining personalization, automation, and real-time analytics in one platform. Built for inside sales teams and B2B marketers, it helps scale genuine conversations instead of generic outreach. With AI-powered campaign generation, SendroAI researches each prospect’s company, persona, and industry to create human-like email sequences. Its adaptive engine learns from geography, timing, and response patterns to improve performance continuously. Key capabilities include: A–Z email testing for unique, optimized messages Automated sequencing and follow-ups with AI timing Multilingual campaigns for global outreach AI research engine for personalized pitches Performance analytics for opens, replies, and conversions Unlike traditional email tools focused on volume, SendroAI enables intelligent, personalized outreach at scale, supported by a clean interface and deep analytics.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Customer.io serves data-driven internet businesses who need to send personalized messages at scale in industries such as SaaS, B2C, education technology, mobile apps, web marketplaces, and more

Audience

Inside Sales Teams, B2B SaaS Companies, SDR / BDR Teams, Lead Generation Agencies, Growth Marketers, Founders launching new products

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$150 per month
Free Version
Free Trial

Pricing

$49/month
Free Version
Free Trial

Reviews/Ratings

Overall 5.0 / 5
ease 4.0 / 5
features 4.0 / 5
design 5.0 / 5
support 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Pros & Cons from Real Users

Pros

  • Customer.io has helped us as an organization to raise our marketing level by supporting our management of customers, attributes and events to maintain a very organized and segmented work rhythm. It also allows us to customize reports, modify users based on their user, add or delete attributes and assign events.

Cons

  • Among the few dislikes that have been presented to us as an organization are: data collection is a slightly weak part of Customer.io.

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Customer.io
Founded: 2012
United States
customer.io

Company Information

SendroAI
Founded: 2025
India
sendro.ai/

Alternatives

Alternatives

Campaigner

Campaigner

j2 Global

Categories

Categories

Email Marketing Features

A/B Testing
Artificial Intelligence
Auto-Responders
CAN SPAM Compliance
Customer Surveys
Drip Campaigns
Dynamic Content
Event Triggered Email
Image Library
Landing Pages/Web Forms
Mailing List Management
Mobile Optimized Emails
Reporting/Analytics
Subscriber Management
Template Management
WYSIWYG Email Editor

Marketing Automation Features

A/B Testing
Analytics / ROI Tracking
Artificial Intelligence
Content / Blogging Platform
Customizable CTAs
Drip Campaigns
Dynamic Content
Landing Pages / Web Forms
Lead Scoring
Sales Intelligence
Search Marketing
Segmentation
Social Marketing
Website Visitor Tracking

Email Marketing Features

A/B Testing
Artificial Intelligence
Auto-Responders
CAN SPAM Compliance
Customer Surveys
Drip Campaigns
Dynamic Content
Event Triggered Email
Image Library
Landing Pages/Web Forms
Mailing List Management
Mobile Optimized Emails
Reporting/Analytics
Subscriber Management
Template Management
WYSIWYG Email Editor

Integrations

LinkedIn
Mailgun
Slack
n8n
Apollo
Causal
Embedery
Ethyca
Fundify
Google Analytics
Meta Audience Network
OptinMonster
Pocus
Poplar
Puntt AI
RestApp
RudderStack
Survicate
Velvet
Wufoo

Integrations

LinkedIn
Mailgun
Slack
n8n
Apollo
Causal
Embedery
Ethyca
Fundify
Google Analytics
Meta Audience Network
OptinMonster
Pocus
Poplar
Puntt AI
RestApp
RudderStack
Survicate
Velvet
Wufoo
Claim Customer.io and update features and information
Claim Customer.io and update features and information
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Claim SendroAI and update features and information