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Top 3 Email Testing Software Companies With $10M–$100M Revenue (August 2026)

As of August 2026, Latka tracks 3 email testing software companies with $10M–$100M in annual revenue. They have combined revenues of $47.6M and employ 170 people. They serve 180K customers combined.

Every company below sells email testing software to other businesses and is ranked by its most recent annual revenue. Revenue, funding, headcount and customer figures come from CEO interviews on the Latka podcast, public company filings, and Latka estimates where a company has not disclosed a number.

What Email Testing Software Companies do

Email Testing Software helps organizations verify the functionality, accuracy, and reliability of their email communications before executing campaigns. This category of software is crucial for ensuring that emails render correctly across various clients and devices, and that they pass through spam filters to reach recipients' inboxes. Users commonly adopt these tools to conduct pre-send testing, A/B testing, and analyze deliverability metrics to improve email marketing strategies. Typical features of email testing software include previewing email displays on different devices and clients, spam filter testing, validation of links and images, and analysis of email content for compliance with best practices. Buyer personas often include marketing professionals, content creators, and IT specialists responsible for maintaining email channel integrity. The primary use case is to enhance the overall effectiveness of email campaigns by identifying potential issues before the emails are dispatched.

Companies
3
Revenue
$47.6M
Funding
-
Employees
170

Filters

Sorting: Highest -> Lowest

Filters

Top Email Testing Software Companies With $10M–$100M Revenue

Showing 3 of 3 companies ranked by annual revenue.

1Flodesk logo
Flodesk

San Francisco, California, United States

Flodesk is a bootstrapped email marketing and e-commerce platform built for small business owners, solopreneurs, photographers, coaches, and creative service providers. Founded in 2019 by Rebecca Shostak, Martha Bitar, and Trong Dong, the company offers a flat-rate subscription model with unlimited subscribers and unlimited sends, positioning itself as the design-forward, price-stable alternative to legacy email platforms that charge more as lists grow. The company reached approximately $27 million in annual recurring revenue as of May 2024, up from $20 million a year prior and $10 million in 2021, a figure it hit roughly 18 to 19 months after launch on $90,000 of founder bootstrap capital and zero outside funding. With 80,000 paying customers, 50 full-time employees, and a gross monthly churn rate of approximately 2 percent, Flodesk generates roughly $540,000 of revenue per employee and is profitable. Growth has been driven primarily by a structured affiliate program that accounts for more than 30 percent of inbound traffic, a viral email footer loop, influencer co-marketing at launch, and organic search. The company launched a second product, Checkout, approximately 18 months before the May 2024 interview, adding a sales-funnel capability that serves as an upsell to the core email product. Flodesk spends approximately $700,000 per quarter on paid advertising and targets a nine-month CAC payback period.

Revenue
$27M
Customers
80K
Year founded
2019
Team size
50
2Goodsalesemails logo
Goodsalesemails

San Francisco, California, United States

Good Sales Emails is a website that provides resources and examples of effective sales emails from various companies. It offers insights and tips on crafting successful sales emails.

Revenue
$10.6M
Year founded
2017
Team size
100
3zerobounce logo
zerobounce

Santa Barbara, California, United States

Our Email Validation Service quickly and accurately removes invalid, disposable, spam traps, abusive and other harmful email addresses. 98% Accuracy Guaranteed. Try our Free Trial now!

Revenue
$10M
Customers
100K
Year founded
2015
Team size
20

Frequently asked questions about Email Testing Software Companies With $10M–$100M Revenue

How many email testing software companies with $10M–$100M in annual revenue are there?

Latka tracks 3 email testing software companies with $10M–$100M in annual revenue. Together they generate $47.6M in annual revenue and employ 170 people.

Which email testing software company with $10M–$100M in annual revenue is the largest?

Flodesk is the largest, with $27M in annual revenue, founded in 2019.

How much revenue does a typical email testing software company with $10M–$100M in annual revenue make?

The average email testing software company in this list makes $15.9M a year, across 3 companies with reported revenue. They serve 180K customers combined.

Who are the leading Email Testing software vendors with $10M–$100M in annual revenue?

Ranked by annual revenue, the leaders are Flodesk, Goodsalesemails and zerobounce.

Related Marketing Software categories

Inclusion Criteria

- Must provide functionality for simulating and analyzing email campaigns - Should include tools for A/B testing and multi-device previews - Must offer spam filter and deliverability testing capabilities - Should validate email content for compliance with industry standards - Must not only focus on email marketing automation; must also enable comprehensive testing and analytics