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SMTP Relay Service Providers


Comparison of top SMTP Relay Services, with their popular features and website links. The comparison contains both open source(free) and commercial(paid) software.

This detailed comparison chart will help you to choose your cloud based SMTP Relay email solution for bulk email or transactional email. Most of them have a free plan, it will help you to test several email sender before deciding which one is the best for your needs.

Mail250Amazon SESMailjetMailgunSendGridPostmarkSparkPostMailtrap
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Precio$ 20 (Send 24k/ Day) $50 (Send 60k/ Day) $150 (Send 120k /Day)$ 0.1 per thousand, plus traffic charges. $0.12 per GB of attachments sent.$ 0.18 to $0.50 per thousand$ 0.1 to $0.50 per thousand$ 0.57 to $0.80 USD per thousand$ 0.5 to1.50 USD per thousand$ 0.2 to $0.15 per thousand, depending on volume$ 10 (10,000 emails/mo), $85 (100,000 emails/mo), $750 (1,500,000 emails/mo)
Free planYes, 10K emails free62,000 emails per month for EC2 users6,000 emails per month, max 200 per day10,000 free per month45 day free trial, 12,000 per month, 400 emails per day25,000 emails, no time limit15,000 emails per month1,000 emails/mo
Startups planYesYes
Cancellation policyCancel any time, no contractPay for what you send; no required contract or commitments.Cancel any time, no contractCancel any time, no contractCancel at any time, no contractCancellation must be issued via the Service. Any cancellation issued must be done three (3) days prior to the end of the contract term.Cancel any time, no contract, month-to-monthCancel any time on the Mailtrap website or via email
Unlimited Free EmailsYou can upload unlimited contacts.
SMTP support Globally redundant SMTP and API infrastructure
Personalized DKIM for free (no more "on behalf of") Upgrade to a Silver plan or higher to get personalized DKIM
Clicks Details (per Link, etc.) Reporting available both through Control Panel and API Via real-time Event API webhook Through webhooks real-time event reporting.
Personnalisation conditionnelle (if/else)- Yes but, not through web newsletter editor, only by using the API
WYSIWYG Newsletter EditorNo Available for free, with any plan (Free plan included)No +$0,25 per thousand, in addition to monthly packageNo- only with "Elite for Marketers" plan
Dedicated IP availableNo $25 per month for EC2 users With our Silver, Gold, Platinum and Diamond Plans, you can ask for a Dedicated IP address. $59 per monthNo Shared IPs. They believe shared IPs are preferable to dedicated.
REST API Yes, for our Bronze plan and higher (and Free plan too)
Event API you can set up Amazon SES to publish email sending events to Amazon CloudWatch or Amazon Kinesis For every plan, you can get every event (open, click, bounce...) in real time Yes, for our Silver plan and higher (and Free plan too) Via Webhooks
Send email through API Only by one HTTP call
Incoming Email SupportNo Using the Parse API you can get the content of an incomming email POSTed by HTTP on a server : Parse emails, including attachements and quoted text. Easily forward using different expression matches, including regex, and POST to HTTP. Supported by Griddler: Parse inbound email, including attachments and content. See for webhook examples. Supported by Griddler: Handles inbound, can be parsed by griddler:
Stores Outgoing Emails for Later ViewingNo Stores for 45 Days 60-days email logs
Explicit/sexual content policy ?No
Needs time to approve account before sending ?No. Domain approval is not required.Mailtrap users get asked to verify their domain
Asks to create SPF and DKIM records Optional
IdiomasEnglishEnglish, French, German, Japanese, SpanishEnglish, French, German, SpanishEnglish, French, RussianEnglishEnglishEnglishEnglish
Multi-user LoginNo
Prioritize emailsNo Email Priority Management is handled on Mailjet with X-Mailjet email headers : Add preferred time of delivery which can prioritize or schedule for later.
Plugins WordPress Prestashop, Wordpress, Dotclear, SPIP, Joomla, Drupal Most major languages and frameworks Node, PHP, Python & More, see 20+ code integrations like Ruby, Python, PHP, Node.js, Java, C#, and more
24/7 Support Basic: Included, Developer: $49/month, Business & Enterprise prorated. Across 3 Global Time Zones - Online ticket generation Online form submission. Online ticket generation. Support by email around the clock. Live chat.No
Dedicated Support Team
Phone Support-- Available with paid support plan- Available for VIP clients- For First-class plans During regular business hours for all plan levels, including "Free." Critical and Escalation Support available 24/7NoNo
Sample CustomersDLF, Vodafone, etcSIEMENS, HBO, Vodafone, AllerganTAG Hauer, MIT, Fotolia, TheFancy, Jolicloud, Readability, Sketchfab, Prestashop, Amnesty International...Github, Heroku, Uservoice, Stripe, 37 Signals, Parse, Adroll, PagerdutySpotify, Foursquare, Pandora, Hootsuite, Uber, Kickstarter, Air BnB, GitHubIKEA, Minecraft, Livestream, Unicef, Litmus, Salesforce-DeskPinterest, Zillow, Financial Times of London, Career BuilderAdobe, ATLASSIAN, Calendly, Yelp, UserTesting
Compare Mail250 vs Amazon SES vs Mailjet vs Mailgun vs SendGrid vs Postmark vs SparkPost
2022-11-28 14:38:57
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User reviews and comments

  • gdouvet on 2017-10-02 09:56:44

    Solution efficace et support réactif. Je recommande

  • edrokov on 2017-09-04 21:49:40
    commented on Mailjet

    So far my experience is extremely ignorant, lazy and helpless first line support basically doing nothing. One ticket resolving takes more than 1 week!

  • Paul on 2016-03-25 21:29:58
    commented on SparkPost

    AVOID SPARKPOST SparkPost is a new Scammer in the place of Email Marketing. They canceled our account only 48 hours after payment claiming that our complaint rate was too high. Out of 27.000 emails sent, we had 150 bounces = 0.5% which is a very low bounce rate in any given industry. (we have made a screenshot showing these data). The way they communicate with us is like a Police Investigation, or even worst since they assume clearly that you are guilty! On Top of this, You can see on the Home Page of their website that they use very poor Marketing Pratices : Welcome Mandrill Customers! Here’s your migration guide. They want to take over the customers of Mandrill, their main competitor, with agressive Marketing. Don't be fooled by their low prices, there is NO service behind, and they use scammer practices

  • Maffoo on 2016-02-06 13:40:45
    commented on Mailgun

    Actually, screw my previous comment. I take it back. They require business verification, and you have to jump through all these hoops for them to allow you to use their service, then beg them "oh pretty please" let me use your service oh wise Rackspace gods. Sod that, no time for that.

  • Maffoo on 2016-02-06 13:38:09
    commented on Mailjet

    Update: managed to get second email confirmation working after being in touch with them via twitter, and decided to go with them due to mailgun's annoying company verification stuff which put me off.

  • Maffoo on 2016-02-01 12:29:54
    commented on Mailgun

    This is definitely my favourite of the lot. Very good service, as to be expected from Rackspace. But also pretty cheap, which isn't so much to be expected from them!

  • Maffoo on 2016-02-01 10:50:54
    commented on Mailjet

    I tried to add a second email to my account and it went straight into spam. Then the confirmation link inside didn't work (404). Then whitelisting my local domain didn't work, so now I'm stuck. Therefore, I have no interest in going any further as I can't be bothered waiting around for them to fix things.

  • Rob Pearl on 2015-12-29 23:29:34
    commented on SparkPost

    great but they dont mention your DAILY LIMITS even on a paid plan

  • Gagan on 2015-12-10 19:29:49
    commented on SparkPost

    I bought sparkpost and they have some problem working with interspire which i got to know later. I asked them to give me time to fix things as i use interspire and you are the only one who need a patch to be added. Neither they refunded and keep billing me for no use. and nor they replied to my request. Handle with care.