Customer.io

We make it easy to send emails triggered by user behavior. Build, measure and improve your emails to activate and retain users

21 Alternatives To Customer.io

ActiveCampaign

Integrated email marketing, marketing automation, and small business CRM. Send beautiful newsletters, setup behavioral based automations, and benefit from sales automation.
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Constant Contact

Constant Contact offers email marketing, social media marketing, online survey, event marketing, digital storefronts, and local deals tools.

ConvertKit

Email marketing software for online creators. We help you earn a living online through an intuitive email marketing automation tool.
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Elastic Email

Elastic Email is an all-in-one email delivery platform for both marketing and transactional email.

Emma

Emma is an email marketing platform that helps over 15,000 brands plan, design, and optimize targeted emails.
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GetResponse

Email marketing from GetResponse. Send email newsletters, campaigns, online surveys and follow-up autoresponders. Simple, easy interface. FREE sign up.
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Intercom

Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers. Intercom helps you build customer relationships through conversational, messenger-based experiences across the customer journey.
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JitBit Helpdesk

JitBit is a web-based help desk and ticketing software solution
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MailChimp

MailChimp is the best way to design, send, and share email newsletters.
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Mailgun

A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.

Mandrill

Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.
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Pardot

Salesforce B2B marketing automation
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Pepipost

Use our powerful Email APIs to deliver all your business critical emails on time and to the Inbox. We are the world’s only ESP that gives cashback on emails opened.

Postmark

Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.
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SENDER

Easy to use, powerful and affordable email marketing application.

SMTP2GO

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!
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SendGrid

Learn why more developers choose SendGrid for their email deliverability service to send transactional emails triggered by web apps. Get started for free
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SendGrid Email API

You can use SendGrid via SMTP or our simple to use Web API. Understand how best to utilize SendGrid.

SendInBlue

Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.

SendPulse

Maximizing e-mail marketing open rates automatically
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turboSMTP

turboSMTP is a reliable, powerful, easy-to-use SMTP server that maximizes the deliverability of all…