Amazon SES
152,502 websites

Amazon SES offers both free and paid options

http://aws.amazon.com/ses

Amazon Simple Email Service (Amazon SES) is a cost-effective outbound-only email-sending service built on the reliable and scalable infrastructure that Amazon.com has developed to serve its own customer base. With Amazon SES, you can send t...

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Postmark
43,112 websites

Postmark offers both free and paid options

https://postmarkapp.com

Email delivery for web apps.

Market Share by Top Websites

1 Amazon SES is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Postmark is clearly lagging behind, losing to Amazon SES in all segments.

Websites Categories

1 Amazon SES has better usage coverage in more websites categories. Including Computers Electronics & Technology, Science & Education, Business & Consumer Services, Finance and 18 other categories.

2 Postmark is leading in Games and Adult.

Geography

1 Amazon SES is leading in most countries, including United States, Japan, United Kingdom, France and 158 other countries.

2 Postmark is leading in Syrian Arab Republic and French Polynesia.