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
65.170 66.103	50.776 50.487	13.059 13.951	1.335 1.665

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 (%)
77.91 % 76.38 %	20.04 % 21.10 %	2.05 % 2.52 %

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	5054 4977	3909 3771	1048 1072	97 134	77.34 % 75.77 %	20.74 % 21.54 %	1.92 % 2.69 %
Elektronics	4865 5009	3784 3852	983 1040	98 117	77.78 % 76.90 %	20.21 % 20.76 %	2.01 % 2.34 %
Entertainment	4883 5116	3811 3886	967 1101	105 129	78.05 % 75.96 %	19.80 % 21.52 %	2.15 % 2.52 %
Cosmetics & Beauty	5003 5279	3922 4045	985 1107	96 127	78.39 % 76.62 %	19.69 % 20.97 %	1.92 % 2.41 %
Food & Drink	5094 5001	3918 3781	1077 1105	99 115	76.91 % 75.60 %	21.14 % 22.10 %	1.94 % 2.30 %
Home & Garden	5052 4977	3925 3791	1016 1055	111 131	77.69 % 76.17 %	20.11 % 21.20 %	2.20 % 2.63 %
Finance	5254 5118	4268 4100	882 886	104 132	81.23 % 80.11 %	16.79 % 17.31 %	1.98 % 2.58 %
Health	4946 4975	4022 3935	816 919	108 121	81.32 % 79.10 %	16.50 % 18.47 %	2.18 % 2.43 %
Pets	5085 5134	3940 3913	1041 1088	104 133	77.48 % 76.22 %	20.47 % 21.19 %	2.05 % 2.59 %
Sport & Fitness	5081 5185	3966 3982	1018 1073	97 130	78.06 % 76.80 %	20.04 % 20.69 %	1.91 % 2.51 %
Job & Career	4957 5080	3705 3747	1146 1217	106 116	74.74 % 73.76 %	23.12 % 23.96 %	2.14 % 2.28 %
Dating	4950 5024	3655 3611	1198 1280	97 133	73.84 % 71.88 %	24.20 % 25.48 %	1.96 % 2.65 %
Other	4946 5228	3951 4073	882 1008	113 147	79.88 % 77.91 %	17.83 % 19.28 %	2.28 % 2.81 %

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	4513 4685	3341 3432	1083 1143	89 110	74.03 % 73.26 %	24.00 % 24.40 %	1.97 % 2.35 %
Outlook Mail	4625 4657	3521 3475	1012 1060	92 122	76.13 % 74.62 %	21.88 % 22.76 %	1.99 % 2.62 %
Yahoo Mail	4521 4781	3465 3598	960 1056	96 127	76.64 % 75.26 %	21.23 % 22.09 %	2.12 % 2.66 %
AOL Mail	4776 4607	3694 3480	980 1009	102 118	77.35 % 75.54 %	20.52 % 21.90 %	2.14 % 2.56 %
Mail.com	4943 4835	3946 3743	900 970	97 122	79.83 % 77.41 %	18.21 % 20.06 %	1.96 % 2.52 %
Yandex Mail	4742 4750	3626 3572	1017 1061	99 117	76.47 % 75.20 %	21.45 % 22.34 %	2.09 % 2.46 %
GMX Mail	4579 4776	3454 3573	1030 1083	95 120	75.43 % 74.81 %	22.49 % 22.68 %	2.07 % 2.51 %
Zoho Mail	4664 4790	3665 3709	905 958	94 123	78.58 % 77.43 %	19.40 % 20.00 %	2.02 % 2.57 %
ProtonMail	4584 4614	3702 3613	793 886	89 115	80.76 % 78.31 %	17.30 % 19.20 %	1.94 % 2.49 %
Custom Mail	4579 4741	3710 3725	766 904	103 112	81.02 % 78.57 %	16.73 % 19.07 %	2.25 % 2.36 %
iCloud Mail	4644 4652	3451 3421	1095 1108	98 123	74.31 % 73.54 %	23.58 % 23.82 %	2.11 % 2.64 %
Tuta	4740 4813	3800 3776	842 916	98 121	80.17 % 78.45 %	17.76 % 19.03 %	2.07 % 2.51 %
Juno.com	4891 4717	3897 3703	893 897	101 117	79.68 % 78.50 %	18.26 % 19.02 %	2.07 % 2.48 %
Mailfence	4369 4685	3504 3667	783 900	82 118	80.20 % 78.27 %	17.92 % 19.21 %	1.88 % 2.52 %

Compare Postmark with other providers

Compare the email deliverability of Postmark with other providers.