AuthSMTP vs Sparkpost comparison

AuthSMTP and Sparkpost are both solutions in the Cloud Email category. AuthSMTP is ranked #11, while Sparkpost is ranked #18. AuthSMTP holds a 2.1% mindshare in CE, compared to Sparkpost’s 0.6% mindshare. Additionally, 100% of Sparkpost users are willing to recommend the solution.

AuthSMTP

Read 1 AuthSMTP review

149 Views
111 Comparison Views

0% willing to recommend

Sparkpost

Read 1 Sparkpost review

77 Views
30 Comparison Views

100% willing to recommend

AuthSMTP

Sparkpost

Comparison Buyer's Guide

Download the report

Executive Summary

We performed a comparison between AuthSMTP and Sparkpost based on real PeerSpot user reviews.

Find out what your peers are saying about MailChimp, Amazon Web Services (AWS), Twilio and others in Cloud Email.

To learn more, read our detailed Cloud Email Report (Updated: May 2025).

Buyer's Guide

Cloud Email

May 2025

Download the complete report

Helped 855,347 peers since 2012

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Categories and Ranking

AuthSMTP

Ranking in Cloud Email

11th

Average Rating

0.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Sparkpost

Ranking in Cloud Email

18th

Average Rating

9.0

Reviews Sentiment

6.6

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of June 2025, in the Cloud Email category, the mindshare of AuthSMTP is 2.1%, down from 2.2% compared to the previous year. The mindshare of Sparkpost is 0.6%, up from 0.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Cloud Email

Featured Reviews

it_user68556

Director of Operations with 51-200 employees

I have been using this service for a

I have been using this service for a few years now and have never had a problem. It offers excellent value for money and it's a relief not to have to worry about whether an email will be sent when you are abroad or away from the office. Highly recommended.

Read full review

Rastu Singh

Technical Consultant - Email Deliverability at Adobe

A consistent solution for transaction emails with a great option to define speed

The option to define the kind of speed we are looking at is valuable. For example, sometimes, we need to slow down for certain customers and do specific configurations, so we don't want to rush it. Or we can email the customer requesting to send it within two hours. So, if they send 2 million or 3 million, we can do it with SparkPost, which is not possible on SendGrid.

Read full review

See which vendors are best for you

Use our free recommendation engine to learn which Cloud Email solutions are best for your needs.

See recommendations

855,347 professionals have used our research since 2012.

Comparisons

SendGrid vs AuthSMTP

Compared 100% of the time

More AuthSMTP Competitors

No data available

Product Reports

Buyer's Guide

Cloud Email

May 2025

Download AuthSMTP product report

Buyer's Guide

Cloud Email

May 2025

Download Sparkpost product report

Overview

AuthSMTP is the outgoing SMTP email service for your e-commerce website, mailing list or email application on most current computers and mobile devices. With instant setup, a money back guarantee and very low cost starter accounts you can test and start sending email in minutes with no risk.

AuthSMTP

SparkPost is the world’s #1 email sender, trusted to send 37% of the world's B2C email. Our data-driven platform optimizes email performance and helps leading enterprises drive top-line results.

Sparkpost

Sample Customers

Trek

Zillow, Quorum, Zip Recruiter, Financial Times, ClickMechanic, Guardian, Comcast, Career Builder, Twitter, Kayak, LinkedIn, Paypal, Zynga, The New York Times, Ebates, Hubspot, Oracle, Marketo, Intercom, Iterable, Tobi, Houzz, Cordial Intelligent Messaging

Find out what your peers are saying about MailChimp, Amazon Web Services (AWS), Twilio and others in Cloud Email. Updated: May 2025.

DOWNLOAD NOW

855,347 professionals have used our research since 2012.

See our list of best Cloud Email vendors.

We monitor all Cloud Email reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.