Constant Contact and Postmark Email Deliverability Comparison

Constant Contact

Postmark

In this comparison, the deliverability of Constant Contact and Postmark is compared in detail. All available data, taking the filters into account, is used for the comparison.

Email deliverability

This comparison compares the numbers for sent emails, you can also see in which folder the emails at the email service provider ended up and how many emails were lost on the way. The numbers look better for Postmark than for Constant Contact.

Emails Sent	Emails Inbox	Emails Spam	Emails Lost
63.973 63.445	50.112 50.822	12.784 11.778	1.666 1.354

Email deliverability rates

The following table shows the most important deliverability rates (in percent) for the compared providers. The higher the inbox rate and the lower the spam rate, the better. Postmark beats Constant Contact in this comparison.

Inbox (%)	Spam (%)	Lost (%)
78.33 % 80.10 %	19.98 % 18.56 %	2.60 % 2.13 %

Email deliverability by category

This comparison compares the deliverability taking into account the category or the industry. The deliverability can vary greatly depending on the industry. In this comparison, Postmark is the clear winner.

Category	Emails Sent	Emails Inbox	Emails Spam	Emails Lost	Inbox (%)	Spam (%)	Lost (%)
Clothing	4680 4784	3647 3827	974 896	124 102	77.93 % 80.00 %	20.81 % 18.73 %	2.65 % 2.13 %
Elektronics	4774 4743	3773 3808	914 875	123 101	79.03 % 80.29 %	19.15 % 18.45 %	2.58 % 2.13 %
Entertainment	5102 5083	3988 4042	1000 963	132 120	78.17 % 79.52 %	19.60 % 18.95 %	2.59 % 2.36 %
Cosmetics & Beauty	4883 4728	3826 3806	990 876	129 96	78.35 % 80.50 %	20.27 % 18.53 %	2.64 % 2.03 %
Food & Drink	4863 4798	3797 3836	1008 913	118 93	78.08 % 79.95 %	20.73 % 19.03 %	2.43 % 1.94 %
Home & Garden	4976 4796	3888 3857	1016 863	127 104	78.14 % 80.42 %	20.42 % 17.99 %	2.55 % 2.17 %
Finance	4956 4978	4015 4085	842 845	140 103	81.01 % 82.06 %	16.99 % 16.97 %	2.82 % 2.07 %
Health	4983 4709	4004 3895	896 721	132 98	80.35 % 82.71 %	17.98 % 15.31 %	2.65 % 2.08 %
Pets	4968 4983	3895 3962	981 938	132 113	78.40 % 79.51 %	19.75 % 18.82 %	2.66 % 2.27 %
Sport & Fitness	4949 5096	3848 4048	1006 976	133 108	77.75 % 79.43 %	20.33 % 19.15 %	2.69 % 2.12 %
Job & Career	5031 4854	3865 3814	1084 983	130 101	76.82 % 78.57 %	21.55 % 20.25 %	2.58 % 2.08 %
Dating	4880 4857	3655 3741	1140 1049	122 103	74.90 % 77.02 %	23.36 % 21.60 %	2.50 % 2.12 %
Other	4928 5036	3911 4101	933 880	124 112	79.36 % 81.43 %	18.93 % 17.47 %	2.52 % 2.22 %

Email deliverability by email service provider

Finally, the following table compares the deliverability taking into account the email service provider. Similar to the industry, also the email service provider can affect the email deliverability in both directions — positive or negative. In this comparison, Postmark is better than Constant Contact.

Provider	Emails Sent	Emails Inbox	Emails Spam	Emails Lost	Inbox (%)	Spam (%)	Lost (%)
Gmail	4709 4638	3594 3591	1032 1000	117 93	76.32 % 77.43 %	21.92 % 21.56 %	2.48 % 2.01 %
Outlook Mail	4505 4562	3463 3585	966 909	120 101	76.87 % 78.58 %	21.44 % 19.93 %	2.66 % 2.21 %
Yahoo Mail	4762 4625	3699 3657	1007 908	124 101	77.68 % 79.07 %	21.15 % 19.63 %	2.60 % 2.18 %
AOL Mail	4603 4633	3576 3688	946 873	121 95	77.69 % 79.60 %	20.55 % 18.84 %	2.63 % 2.05 %
Mail.com	4887 4620	3873 3772	937 766	128 97	79.25 % 81.65 %	19.17 % 16.58 %	2.62 % 2.10 %
Yandex Mail	4565 4706	3565 3758	953 882	126 101	78.09 % 79.86 %	20.88 % 18.74 %	2.76 % 2.15 %
GMX Mail	4561 4690	3484 3679	986 928	115 111	76.39 % 78.44 %	21.62 % 19.79 %	2.52 % 2.37 %
Zoho Mail	4795 4704	3814 3835	899 817	127 99	79.54 % 81.53 %	18.75 % 17.37 %	2.65 % 2.10 %
ProtonMail	4616 4536	3720 3702	833 801	116 94	80.59 % 81.61 %	18.05 % 17.66 %	2.51 % 2.07 %
Custom Mail	4732 4667	3784 3866	865 748	126 103	79.97 % 82.84 %	18.28 % 16.03 %	2.66 % 2.21 %
iCloud Mail	4639 4614	3554 3582	1020 966	125 99	76.61 % 77.63 %	21.99 % 20.94 %	2.69 % 2.15 %
Tuta	4582 4645	3641 3785	861 801	117 99	79.46 % 81.49 %	18.79 % 17.24 %	2.55 % 2.13 %
Juno.com	4724 4779	3767 3901	848 834	120 101	79.74 % 81.63 %	17.95 % 17.45 %	2.54 % 2.11 %
Mailfence	3293 3026	2578 2421	631 545	84 60	78.29 % 80.01 %	19.16 % 18.01 %	2.55 % 1.98 %

Compare Constant Contact with other providers

Compare the email deliverability of Constant Contact with other providers.