When comparing Postmark vs SparkPost, the Slant community recommends Postmark for most people. In the question“What are the best transactional email services?” Postmark is ranked 2nd while SparkPost is ranked 8th. The most important reason people chose Postmark is:
Postmark is designed to send transactional messages. It specifically warns users not to use it to send weekly newsletter -- this way the emails sent by Postmark are less likely to be marked as spam, increasing the likelihood of your messages reaching the users.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Messages are unlikely to be marked as spam
Postmark is designed to send transactional messages. It specifically warns users not to use it to send weekly newsletter -- this way the emails sent by Postmark are less likely to be marked as spam, increasing the likelihood of your messages reaching the users.
Pro DMARC
Supports domain-based message authentication which helps to prevent spammers from using your domain to send email without your permission.
Pro Detailed analytics
Postmark offers very detailed analytics for your emails. For starters, it stores 45 days worth of email logs where you can search to find out which emails were sent, received, who received them, who read them and who marked them as spam.
There are also recipient profiles which keep track of everyone who gets your emails, complete with a list of messages that they have opened, deleted or marked as spam.
Pro Messages are Saved for 45 Days
All outgoing messages are saved for 45 days so you can see what you're sending to who. This is important if you are sending any dynamic content in your emails.
Pro Multiple server locations
Postmark has 5 server locations around the world (3 in the US, 1 in Amsterdam and 1 in SIngapore). This way emails will be sent fast regardless of where your users are.
Pro Built for developers
SparkPost supports both SMTP and REST APIs and has client libraries supportings many languages including nodejs, python, php, ruby, go, elixir, and java.
Pro Best Inboxing of any provider by almost 10 points, supported by third party data
SparkPost delivers more messages to the inbox than any other provider, not just to the recipient, to the actual inbox. So while almost every company will claim high 90's on deliverability, Sparkpost is the only one that's been able to demonstrate high 90's on inbox placement as well. This has real revenue impact.
Pro Responsive and helpful support
The support team at SparkPost is extremely responsive to questions and goes above and beyond to solve any challenges and help customers get the most out of their messaging.
Cons
Con Expensive
Postmark are one of the most expensive (if not the most expensive) services in the market, at $1.5 per 1000 emails.
Con Bad customer service
