CritSend
CritSend is a SMTP relay for developers.
Market Share of CritSend
Current Customer(s)
18
Market Share (Est.)
0.23%
Ranking
#21
Top Competitors and Alternatives of CritSend
The top three of CritSend’s competitors in the Email Deliverability category are Litmus with 34.97%, SquirrelMail with 13.16%, SocketLabs with 9.59% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| Litmus | 2771 | 34.97% | CritSend vs Litmus |
| SquirrelMail | 1043 | 13.16% | CritSend vs SquirrelMail |
| SocketLabs | 760 | 9.59% | CritSend vs SocketLabs |
| Email On Acid | 594 | 7.50% | CritSend vs Email On Acid |
| SparkPost | 412 | 5.20% | CritSend vs SparkPost |
| PowerMTA | 296 | 3.74% | CritSend vs PowerMTA |
| WhatCounts | 252 | 3.18% | CritSend vs WhatCounts |
| DataValidation | 247 | 3.12% | CritSend vs DataValidation |
| MasterBase | 247 | 3.12% | CritSend vs MasterBase |
| Postmark | 230 | 2.90% | CritSend vs Postmark |
| Mailtrap | 180 | 2.27% | CritSend vs Mailtrap |
| Pepipost | 170 | 2.15% | CritSend vs Pepipost |
| SMTP2GO | 147 | 1.85% | CritSend vs SMTP2GO |
| Netcore Email API | 122 | 1.54% | CritSend vs Netcore Email API |
| 250ok | 101 | 1.27% | CritSend vs 250ok |
| SMTP.com | 80 | 1.01% | CritSend vs SMTP.com |
| BriteVerify | 61 | 0.77% | CritSend vs BriteVerify |
| turboSMTP | 60 | 0.76% | CritSend vs turboSMTP |
| eDataSource | 35 | 0.44% | CritSend vs eDataSource |
| EmailDelivered | 19 | 0.24% | CritSend vs EmailDelivered |
Popular Comparisons
Top Competitors and Alternatives of CritSend
The top three of CritSend’s competitors in the Email Deliverability category are Litmus with 34.97%, SquirrelMail with 13.16%, SocketLabs with 9.59% market share.
CritSend vs Litmus
CritSend vs SquirrelMail
CritSend vs SocketLabs
CritSend vs Email On Acid
CritSend vs SparkPost
CritSend vs PowerMTA
CritSend vs WhatCounts
CritSend vs DataValidation
Customers of CritSend
Around the world in 2026, over 17 companies have started using CritSend as Email Deliverability tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Loader | 10 - 19 | Murrells Inlet | South Carolina | United States |   |
| GPS Finance | 20 - 49 | London | England | United Kingdom |   |
| Gamble Away Carefully | 0 - 9 | Nyon | Vaud | Switzerland | |
| Style Uncovered | 0 - 9 | New Rochelle | New York | United States | |
| Pink Ladies Cleaning Services | 0 - 9 | Manchester | England | United Kingdom | |
| Diligent Enigma | 0 - 9 | Lisbon | Lisbon | Portugal | |
| Hoheluftschiff E.V. | 0 - 9 | Hamburg | Hamburg | Germany | |
| Southrn Cargo Packers & Movers | 250 - 499 | Hyderabad | Telangana | India | |
| Ricardo Castello Branco | 0 - 9 | Rio de Janeiro | Rio de Janeiro | Brazil | |
| Edisa Corp | 0 - 9 | Hialeah | Florida | United States | |
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CritSend Customers by Products and Services
The top three products and services offering customers that use CritSend for Email Deliverability are Fashion (1), Home Owner Business Loans (1), Buy-To-Let Mortgages (1).
Customers
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CritSend Customers by Employee Size
The majority of CritSend's customers for the email-deliverability category fall in the company size of 0 - 9 employees (12 companies), 20 - 49 employees (2 companies), 250 - 499 employees (1 companies).
Employee Size
CritSend Customers by Geography
The top three geographies of CritSend for email-deliverability are the United States with 5(29.41%), United Kingdom with 3(17.65%), Brazil with 2(11.76%) customers respectively.
Customers
Employees of CritSend
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FAQ
Find answers to the most often asked questions by users.
Who are the top CritSend competitors?
CritSend’s Top competitors in the email-deliverability category are Litmus, SquirrelMail, SocketLabs. You can view a full list of CritSend competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of CritSend and 40,000 other technologies on the internet. You can also compare CritSend and its feature with top competitors here : CritSend vs Litmus CritSend vs SquirrelMail CritSend vs SocketLabs.
What is CritSend customer distribution based on company size?
What is CritSend market share in the email-deliverability?
What are the top countries that use CritSend?
What are the top industries that use CritSend?
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