CritSend
CritSend is a SMTP relay for developers.
Market Share of CritSend
Current Customer(s)
20
Market Share (Est.)
0.38%
Ranking
#19
Top Competitors and Alternatives of CritSend
The top three of CritSend’s competitors in the Email Deliverability category are Litmus with 27.04%, SquirrelMail with 18.28%, SocketLabs with 14.25% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| Litmus | 1423 | 27.04% | CritSend vs Litmus |
| SquirrelMail | 962 | 18.28% | CritSend vs SquirrelMail |
| SocketLabs | 750 | 14.25% | CritSend vs SocketLabs |
| Email On Acid | 293 | 5.57% | CritSend vs Email On Acid |
| SparkPost | 242 | 4.60% | CritSend vs SparkPost |
| PowerMTA | 207 | 3.93% | CritSend vs PowerMTA |
| MasterBase | 204 | 3.88% | CritSend vs MasterBase |
| WhatCounts | 182 | 3.46% | CritSend vs WhatCounts |
| Pepipost | 161 | 3.06% | CritSend vs Pepipost |
| Postmark | 138 | 2.62% | CritSend vs Postmark |
| SMTP2GO | 136 | 2.58% | CritSend vs SMTP2GO |
| Netcore Email API | 117 | 2.22% | CritSend vs Netcore Email API |
| Mailtrap | 102 | 1.94% | CritSend vs Mailtrap |
| 250ok | 63 | 1.20% | CritSend vs 250ok |
| turboSMTP | 58 | 1.10% | CritSend vs turboSMTP |
| SMTP.com | 44 | 0.84% | CritSend vs SMTP.com |
| BriteVerify | 37 | 0.70% | CritSend vs BriteVerify |
| DataValidation | 33 | 0.63% | CritSend vs DataValidation |
| EmailDelivered | 20 | 0.38% | CritSend vs EmailDelivered |
| eDataSource | 15 | 0.29% | CritSend vs eDataSource |
Popular Comparisons
Top Competitors and Alternatives of CritSend
The top three of CritSend’s competitors in the Email Deliverability category are Litmus with 27.04%, SquirrelMail with 18.28%, SocketLabs with 14.25% market share.
CritSend vs Litmus
CritSend vs SquirrelMail
CritSend vs SocketLabs
CritSend vs Email On Acid
CritSend vs SparkPost
CritSend vs PowerMTA
CritSend vs MasterBase
CritSend vs WhatCounts
Customers of CritSend
Around the world in 2026, over 19 companies have started using CritSend as Email Deliverability tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| GPS Finance | 20 - 49 | London | England | United Kingdom |     |
| Loader | 10 - 19 | Murrells Inlet | South Carolina | United States | |
| Diligent Enigma | 0 - 9 | Lisbon | Lisbon | Portugal | |
| Style Uncovered | 0 - 9 | New Rochelle | New York | United States | |
| Pink Ladies Cleaning Services | 0 - 9 | Manchester | England | United Kingdom | |
| Gamble Away Carefully | 0 - 9 | Nyon | Vaud | Switzerland | |
| 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 | |
Uncover hidden demand and identify accounts ready to buy with 6sense Intent Data.
CritSend Customers by Products and Services
The top three products and services offering customers that use CritSend for Email Deliverability are Bridging Finance (1), Home Owner Business Loans (1), Affordablefashion (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 (14 companies), 20 - 49 employees (2 companies), 10 - 19 employees (1 companies).
Employee Size
CritSend Customers by Geography
The top three geographies of CritSend for email-deliverability are the United States with 5(27.78%), United Kingdom with 3(16.67%), India with 2(11.11%) customers respectively.
Customers
Employees of CritSend
Also see other Products/Services by CritSend in:
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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