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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

Resend is a cloud-based email delivery platform that enables developers and businesses to send transactional and marketing emails through APIs, SDKs, and SMTP. The platform supports automated emails such as account verification messages, password resets, notifications, receipts, and customer communications. Its developer tools include a REST API, software development kits for multiple programming languages, and React Email integration for building reusable email templates. Resend also provides marketing email capabilities, including contact management, audience segmentation, broadcast campaigns, and a visual email editor. Email monitoring features include delivery tracking, open and click analytics, bounce reporting, webhooks, and detailed API logs. The platform offers domain authentication, deliverability monitoring, dedicated IP addresses, and automated workflows to help organizations manage email communications at scale.

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

Software developers, SaaS companies, startup founders, application engineers, DevOps teams, product teams, digital marketers, ecommerce businesses, and organizations seeking programmable email delivery, transactional messaging, marketing automation, contact management, and email performance monitoring

Support

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

Support

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

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$150 per month
Free Version Not Supported
Free Trial Supported

Pricing

$20 per month
Free Version Supported
Free Trial Not 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 4.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 4.0 / 5
support 4.0 / 5

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.

Pros & Cons from Real Users

Pros

  • Having the ability to send transactional emails via API makes integrating Resend into an application significantly easier. We set up Resend to handle key transactional emails such as verifying accounts, sending forgot password emails and notifications about usage in our customer accounts. It was easy for our developers to integrate and the pricing scales nicely.

Cons

  • To be honest as long as you know that Resend is designed for transactional emails, and not marketing emails, there's no major negatives of the platform itself. I would have given it 5 stars, but the jump in pricing to have 7 day data retention is higher than I would have liked.

Training

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

Training

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

Company Information

Customer.io
Founded: 2012
United States
customer.io

Company Information

Resend
Founded: 2023
United States
resend.com

Alternatives

Alternatives

BlueFox Email

BlueFox Email

Innovaris Group
Campaigner

Campaigner

j2 Global

Categories

Categories

Email APIs Supported

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

Integrations

Activepieces Supported
Axis LMS Supported
ElectroNeek Supported
Grok Bot Supported
Integry Supported
Leo Supported
Velt Supported
Workers by Delos Supported
Default Supported
DwellTrack Not Supported
Emailable Supported
Indie Starter Not Supported
Instagram Supported
Leado Not Supported
Marina Edge Pro Not Supported
Meta Audience Network Supported
Seekwell Supported
Supastarter Not Supported
Webleadr Not Supported
Xplenty Supported

Integrations

Activepieces Supported
Axis LMS Supported
ElectroNeek Supported
Grok Bot Supported
Integry Supported
Leo Supported
Velt Supported
Workers by Delos Supported
Default Not Supported
DwellTrack Supported
Emailable Not Supported
Indie Starter Supported
Instagram Not Supported
Leado Supported
Marina Edge Pro Supported
Meta Audience Network Not Supported
Seekwell Not Supported
Supastarter Supported
Webleadr Supported
Xplenty Not Supported
Claim Customer.io and update features and information
Claim Customer.io and update features and information
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Claim Resend and update features and information