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
65.852 65.027	49.870 50.616	14.151 13.085	1.831 1.326

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 (%)
75.73 % 77.84 %	21.49 % 20.12 %	2.78 % 2.04 %

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	4975 4970	3735 3843	1093 1033	147 94	75.08 % 77.32 %	21.97 % 20.78 %	2.95 % 1.89 %
Elektronics	5013 4862	3808 3785	1072 983	133 94	75.96 % 77.85 %	21.38 % 20.22 %	2.65 % 1.93 %
Entertainment	5191 4997	3918 3877	1130 1015	143 105	75.48 % 77.59 %	21.77 % 20.31 %	2.75 % 2.10 %
Cosmetics & Beauty	5249 4939	3970 3869	1140 976	139 94	75.63 % 78.34 %	21.72 % 19.76 %	2.65 % 1.90 %
Food & Drink	5000 5061	3762 3882	1109 1078	129 101	75.24 % 76.70 %	22.18 % 21.30 %	2.58 % 2.00 %
Home & Garden	4940 5067	3732 3946	1070 1012	138 109	75.55 % 77.88 %	21.66 % 19.97 %	2.79 % 2.15 %
Finance	5044 5190	4011 4199	884 884	149 107	79.52 % 80.91 %	17.53 % 17.03 %	2.95 % 2.06 %
Health	4973 4964	3925 4038	909 818	139 108	78.93 % 81.35 %	18.28 % 16.48 %	2.80 % 2.18 %
Pets	5123 5115	3874 3960	1104 1051	145 104	75.62 % 77.42 %	21.55 % 20.55 %	2.83 % 2.03 %
Sport & Fitness	5167 4997	3923 3891	1099 1008	145 98	75.92 % 77.87 %	21.27 % 20.17 %	2.81 % 1.96 %
Job & Career	5053 4970	3688 3720	1236 1149	129 101	72.99 % 74.85 %	24.46 % 23.12 %	2.55 % 2.03 %
Dating	4989 4915	3562 3632	1285 1185	142 98	71.40 % 73.90 %	25.76 % 24.11 %	2.85 % 1.99 %
Other	5135 4980	3962 3974	1020 893	153 113	77.16 % 79.80 %	19.86 % 17.93 %	2.98 % 2.27 %

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	4661 4525	3403 3346	1140 1094	118 85	73.01 % 73.94 %	24.46 % 24.18 %	2.53 % 1.88 %
Outlook Mail	4542 4546	3334 3464	1076 993	132 89	73.40 % 76.20 %	23.69 % 21.84 %	2.91 % 1.96 %
Yahoo Mail	4750 4730	3536 3610	1078 1018	136 102	74.44 % 76.32 %	22.69 % 21.52 %	2.86 % 2.16 %
AOL Mail	4611 4744	3443 3664	1035 980	133 100	74.67 % 77.23 %	22.45 % 20.66 %	2.88 % 2.11 %
Mail.com	4915 4897	3772 3912	1008 888	135 97	76.74 % 79.89 %	20.51 % 18.13 %	2.75 % 1.98 %
Yandex Mail	4699 4667	3509 3569	1063 1003	127 95	74.68 % 76.47 %	22.62 % 21.49 %	2.70 % 2.04 %
GMX Mail	4698 4666	3479 3499	1089 1066	130 101	74.05 % 74.99 %	23.18 % 22.85 %	2.77 % 2.16 %
Zoho Mail	4864 4684	3739 3686	987 906	138 92	76.87 % 78.69 %	20.29 % 19.34 %	2.84 % 1.96 %
ProtonMail	4644 4568	3616 3673	900 810	128 85	77.86 % 80.41 %	19.38 % 17.73 %	2.76 % 1.86 %
Custom Mail	4787 4630	3739 3781	918 744	130 105	78.11 % 81.66 %	19.18 % 16.07 %	2.72 % 2.27 %
iCloud Mail	4580 4587	3334 3396	1110 1093	136 98	72.79 % 74.04 %	24.24 % 23.83 %	2.97 % 2.14 %
Tuta	4732 4684	3672 3760	923 826	137 98	77.60 % 80.27 %	19.51 % 17.63 %	2.90 % 2.09 %
Juno.com	4659 4737	3633 3776	902 866	124 95	77.98 % 79.71 %	19.36 % 18.28 %	2.66 % 2.01 %
Mailfence	4710 4362	3661 3480	922 798	127 84	77.73 % 79.78 %	19.58 % 18.29 %	2.70 % 1.93 %

Compare Constant Contact with other providers

Compare the email deliverability of Constant Contact with other providers.