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
65.137 66.282	50.600 50.632	13.149 13.969	1.388 1.681

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 (%)
77.68 % 76.39 %	20.19 % 21.08 %	2.13 % 2.54 %

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	5071 5057	3914 3831	1056 1082	101 144	77.18 % 75.76 %	20.82 % 21.40 %	1.99 % 2.85 %
Elektronics	4882 5044	3796 3852	979 1074	107 118	77.76 % 76.37 %	20.05 % 21.29 %	2.19 % 2.34 %
Entertainment	4910 5084	3793 3854	1011 1103	106 127	77.25 % 75.81 %	20.59 % 21.70 %	2.16 % 2.50 %
Cosmetics & Beauty	5043 5338	3928 4100	1011 1107	104 131	77.89 % 76.81 %	20.05 % 20.74 %	2.06 % 2.45 %
Food & Drink	5038 5065	3866 3816	1075 1127	97 122	76.74 % 75.34 %	21.34 % 22.25 %	1.93 % 2.41 %
Home & Garden	5083 4893	3928 3720	1044 1040	111 133	77.28 % 76.03 %	20.54 % 21.25 %	2.18 % 2.72 %
Finance	5308 5137	4312 4115	881 891	115 131	81.24 % 80.11 %	16.60 % 17.34 %	2.17 % 2.55 %
Health	5000 4951	4060 3918	830 915	110 118	81.20 % 79.14 %	16.60 % 18.48 %	2.20 % 2.38 %
Pets	5137 5072	3965 3863	1063 1079	109 130	77.19 % 76.16 %	20.69 % 21.27 %	2.12 % 2.56 %
Sport & Fitness	4944 5207	3845 4012	997 1066	102 129	77.77 % 77.05 %	20.17 % 20.47 %	2.06 % 2.48 %
Job & Career	4922 5172	3676 3821	1142 1232	104 119	74.69 % 73.88 %	23.20 % 23.82 %	2.11 % 2.30 %
Dating	4871 5040	3605 3645	1165 1258	101 137	74.01 % 72.32 %	23.92 % 24.96 %	2.07 % 2.72 %
Other	4928 5222	3912 4085	895 995	121 142	79.38 % 78.23 %	18.16 % 19.05 %	2.46 % 2.72 %

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	4479 4720	3323 3466	1062 1142	94 112	74.19 % 73.43 %	23.71 % 24.19 %	2.10 % 2.37 %
Outlook Mail	4531 4670	3444 3471	991 1081	96 118	76.01 % 74.33 %	21.87 % 23.15 %	2.12 % 2.53 %
Yahoo Mail	4597 4766	3508 3591	991 1049	98 126	76.31 % 75.35 %	21.56 % 22.01 %	2.13 % 2.64 %
AOL Mail	4857 4630	3756 3488	996 1026	105 116	77.33 % 75.33 %	20.51 % 22.16 %	2.16 % 2.51 %
Mail.com	4956 4843	3934 3741	923 983	99 119	79.38 % 77.25 %	18.62 % 20.30 %	2.00 % 2.46 %
Yandex Mail	4687 4819	3562 3636	1019 1069	106 114	76.00 % 75.45 %	21.74 % 22.18 %	2.26 % 2.37 %
GMX Mail	4506 4755	3390 3565	1018 1065	98 125	75.23 % 74.97 %	22.59 % 22.40 %	2.17 % 2.63 %
Zoho Mail	4645 4707	3625 3631	924 949	96 127	78.04 % 77.14 %	19.89 % 20.16 %	2.07 % 2.70 %
ProtonMail	4620 4638	3706 3624	824 892	90 122	80.22 % 78.14 %	17.84 % 19.23 %	1.95 % 2.63 %
Custom Mail	4614 4727	3728 3749	781 860	105 118	80.80 % 79.31 %	16.93 % 18.19 %	2.28 % 2.50 %
iCloud Mail	4518 4743	3365 3490	1052 1130	101 123	74.48 % 73.58 %	23.28 % 23.82 %	2.24 % 2.59 %
Tuta	4771 4845	3807 3787	863 938	101 120	79.79 % 78.16 %	18.09 % 19.36 %	2.12 % 2.48 %
Juno.com	4871 4791	3869 3767	892 901	110 123	79.43 % 78.63 %	18.31 % 18.81 %	2.26 % 2.57 %
Mailfence	4485 4628	3583 3626	813 884	89 118	79.89 % 78.35 %	18.13 % 19.10 %	1.98 % 2.55 %

Compare Postmark with other providers

Compare the email deliverability of Postmark with other providers.