Postmark and Constant Contact Email Deliverability Comparison

Postmark

Constant Contact

In this comparison, the deliverability of Postmark and Constant Contact 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
65.027 65.852	50.616 49.870	13.085 14.151	1.326 1.831

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

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

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

Compare Postmark with other providers

Compare the email deliverability of Postmark with other providers.