StackShareStackShare
Follow on
StackShare

Discover and share technology stacks from companies around the world.

Follow on

© 2025 StackShare. All rights reserved.

Product

  • Stacks
  • Tools
  • Feed

Company

  • About
  • Contact

Legal

  • Privacy Policy
  • Terms of Service
  1. Stackups
  2. Business Tools
  3. Marketing Automation
  4. Email Marketing
  5. Constant Contact vs Email on Acid

Constant Contact vs Email on Acid

OverviewComparisonAlternatives

Overview

Constant Contact
Constant Contact
Stacks34
Followers26
Votes0
Email on Acid
Email on Acid
Stacks48
Followers63
Votes19

Constant Contact vs Email on Acid: What are the differences?

Developers describe Constant Contact as "Grow with Email Marketing. Guaranteed". As an industry leader in permission based online marketing, Constant Contact partners with the leading providers of online marketing and social media marketing solutions. On the other hand, Email on Acid is detailed as "Email testing made simple". Email on Acid is the most affordable, self-serve email testing platform in the world. We can help you maximize the success of your email marketing efforts by diagnosing and improving your renderability, deliverability, click-throughs and conversions.

Constant Contact and Email on Acid are primarily classified as "Email Marketing" and "Email Testing" tools respectively.

Some of the features offered by Constant Contact are:

  • Templates and one-click editing- Easy to use. Choose your customizable template.
  • Free personal coaching and support- By phone, email, chat, and in person—anytime.
  • Affordable—start for FREE- Priced for small businesses and nonprofits.

On the other hand, Email on Acid provides the following key features:

  • Preview your email in 8 operating systems, 6 web browsers, and 32 email clients - all within one click.
  • Preview your email before you send it!- We manage hundreds of servers and mobile devices to deliver you the fastest results possible.
  • Our Code Analysis identifies individual lines of code that are not supported in each email client.- Discrepancies are classified as critical, moderate, or minor. Critical errors might adversely affect your layout whereas minor errors might include unsupported fonts, alt, or title tags.

Share your Stack

Help developers discover the tools you use. Get visibility for your team's tech choices and contribute to the community's knowledge.

View Docs
CLI (Node.js)
or
Manual

Detailed Comparison

Constant Contact
Constant Contact
Email on Acid
Email on Acid

As an industry leader in permission based online marketing, Constant Contact partners with the leading providers of online marketing and social media marketing solutions.

Email on Acid is the most affordable, self-serve email testing platform in the world. We can help you maximize the success of your email marketing efforts by diagnosing and improving your renderability, deliverability, click-throughs and conversions.

Templates and one-click editing- Easy to use. Choose your customizable template;Free personal coaching and support- By phone, email, chat, and in person—anytime;Affordable—start for FREE- Priced for small businesses and nonprofits;Secure, permission-based email lists- Grow your email lists—it's secure and easy;Facebook, Twitter links- Promote your campaign on social media;Anti-spam checker- Send campaigns that get delivered;Social Stats- See who tweets, likes, and shares your emails;Apps & Integrations- Sync with your apps or find new ones
Preview your email in 8 operating systems, 6 web browsers, and 32 email clients - all within one click.;Preview your email before you send it!- We manage hundreds of servers and mobile devices to deliver you the fastest results possible.;Our Code Analysis identifies individual lines of code that are not supported in each email client.- Discrepancies are classified as critical, moderate, or minor. Critical errors might adversely affect your layout whereas minor errors might include unsupported fonts, alt, or title tags.;Use our library of tips and tricks to resolve issues - fast!- Since 2008, we've documented tons of quirky nuances that you might encounter when developing your HTML email. Details and work-a-round solutions are provided for each individual client, all from within your test result window!;Link & Image Validation- We'll check to ensure that each of your link and image references are valid.;Spell Check- We support English, Spanish, Dutch, German and French!;Character Conversion- Make sure your special characters remain intact using our free conversion tool. Here's more on that topic.;Code Validation (optional)- When it comes to email, WC3 standards are more important than ever! For this reason, we run a pre-flight check on your email before we process your results.;Client Interpretation- Clients like Outlook 2007 & 2010 convert your original source code making it difficult to identify the cause of rendering issues. With this feature, you can compare your HTML - before and after.;Recommendations- Using our library of known tips and tricks, we'll scan through your source code and make recommendations that will improve your renderability. It's a great way to catch something you might have missed while perusing through your test results.
Statistics
Stacks
34
Stacks
48
Followers
26
Followers
63
Votes
0
Votes
19
Pros & Cons
No community feedback yet
Pros
  • 8
    Most Affordable & Most Accurate Email Testing Tool
  • 4
    Easy setup
  • 4
    Unlimited Testing
  • 3
    Most accurate results
Integrations
PayPal
PayPal
Get Satisfaction
Get Satisfaction
FreshDesk
FreshDesk
Unbounce
Unbounce
Formstack
Formstack
No integrations available

What are some alternatives to Constant Contact, Email on Acid?

Mailchimp

Mailchimp

MailChimp helps you design email newsletters, share them on social networks, integrate with services you already use, and track your results. It's like your own personal publishing platform.

Campaign Monitor

Campaign Monitor

Campaign Monitor makes it easy to attract new subscribers, send them beautiful email newsletters and see stunning reports on the results.

Litmus

Litmus

Litmus is a testing service for web and marketing professionals. It allows people to cross-browser test their websites, and test their email newsletters across a range of email clients and spam filters.

Zoho Mail

Zoho Mail

It is a secure and reliable business email solution tailor-made for your organization's communication needs. With enhanced collaboration features, it's not just an inbox—it's more.

Mailtrain

Mailtrain

Mailtrain is a self hosted newsletter application built on Node.js (v5+) and MySQL (v5.5+ or MariaDB).

Iterable

Iterable

Iterable empowers growth marketers to create world-class user engagement campaigns throughout the full lifecycle, and across all channels. Marketers segment users, build workflows, automate touchpoints at scale without engineering support.

Mailtrap

Mailtrap

We offer one platform that covers all email-related needs in one place: testing, sending, and in-depth tracking to control how email infrastructure works and performs.

GetResponse

GetResponse

It enables you to create a valuable marketing list of prospects, partners, and clients, so you can develop relationships with them and build a responsive and profitable customer base.

Mailsac

Mailsac

Disposable email and fake email capture for QA and development teams

SendinBlue

SendinBlue

It is a digital marketing toolbox that's built to scale and adapt with you as you grow. You can save time and boost performance by automating your segmentation and marketing messages.

Related Comparisons

HipChat
Slack

HipChat vs Mattermost vs Slack

Litmus
Email on Acid

Email on Acid vs Litmus

InVision
Proto.io

InVision vs Marvel vs Proto.io

Webex
Microsoft Teams

Microsoft Teams vs Webex

Slack
RocketChat

Mattermost vs RocketChat vs Slack