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
63.445 63.973	50.822 50.112	11.778 12.784	1.354 1.666

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 (%)
80.10 % 78.33 %	18.56 % 19.98 %	2.13 % 2.60 %

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

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

Compare Postmark with other providers

Compare the email deliverability of Postmark with other providers.