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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 Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

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 Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$150 per month
Free Version Not Supported
Free Trial Supported

Pricing

$49/month
Free Version Not Supported
Free Trial Supported

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 Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

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 Supported
Artificial Intelligence Not Supported
Auto-Responders Not Supported
CAN SPAM Compliance Supported
Customer Surveys Not Supported
Drip Campaigns Supported
Dynamic Content Supported
Event Triggered Email Supported
Image Library Supported
Landing Pages/Web Forms Not Supported
Mailing List Management Supported
Mobile Optimized Emails Supported
Reporting/Analytics Supported
Subscriber Management Supported
Template Management Supported
WYSIWYG Email Editor Supported

Marketing Automation Features

A/B Testing Supported
Analytics / ROI Tracking Supported
Artificial Intelligence Not Supported
Content / Blogging Platform Not Supported
Customizable CTAs Supported
Drip Campaigns Supported
Dynamic Content Supported
Landing Pages / Web Forms Not Supported
Lead Scoring Not Supported
Sales Intelligence Not Supported
Search Marketing Not Supported
Segmentation Supported
Social Marketing Supported
Website Visitor Tracking Supported

Email Marketing Features

A/B Testing Supported
Artificial Intelligence Supported
Auto-Responders Supported
CAN SPAM Compliance Not Supported
Customer Surveys Not Supported
Drip Campaigns Supported
Dynamic Content Supported
Event Triggered Email Supported
Image Library Not Supported
Landing Pages/Web Forms Not Supported
Mailing List Management Supported
Mobile Optimized Emails Not Supported
Reporting/Analytics Supported
Subscriber Management Not Supported
Template Management Supported
WYSIWYG Email Editor Not Supported

Integrations

LinkedIn Supported
Mailgun Supported
Slack Supported
n8n Supported
Activepieces Supported
Amazon S3 Supported
Branch Supported
ElectroNeek Supported
Gmail Not Supported
Grouparoo Supported
GrowSurf Supported
Latitude Supported
Ninja Popups Supported
OptinMonster Supported
Prepr Supported
Raklet Supported
RestApp Supported
Rippling Supported
Vessel Supported
Zoho Forms Supported

Integrations

LinkedIn Supported
Mailgun Supported
Slack Supported
n8n Supported
Activepieces Not Supported
Amazon S3 Not Supported
Branch Not Supported
ElectroNeek Not Supported
Gmail Supported
Grouparoo Not Supported
GrowSurf Not Supported
Latitude Not Supported
Ninja Popups Not Supported
OptinMonster Not Supported
Prepr Not Supported
Raklet Not Supported
RestApp Not Supported
Rippling Not Supported
Vessel Not Supported
Zoho Forms Not Supported
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