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
64.919 65.457	50.483 49.992	13.108 13.772	1.328 1.693

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 (%)
77.76 % 76.37 %	20.19 % 21.04 %	2.05 % 2.59 %

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	4961 4789	3834 3623	1029 1037	98 129	77.28 % 75.65 %	20.74 % 21.65 %	1.98 % 2.69 %
Elektronics	4886 4926	3792 3784	995 1023	99 119	77.61 % 76.82 %	20.36 % 20.77 %	2.03 % 2.42 %
Entertainment	5077 5074	3911 3868	1056 1073	110 133	77.03 % 76.23 %	20.80 % 21.15 %	2.17 % 2.62 %
Cosmetics & Beauty	4939 5140	3857 3913	987 1097	95 130	78.09 % 76.13 %	19.98 % 21.34 %	1.92 % 2.53 %
Food & Drink	5041 5050	3880 3825	1060 1104	101 121	76.97 % 75.74 %	21.03 % 21.86 %	2.00 % 2.40 %
Home & Garden	4911 4925	3830 3745	976 1054	105 126	77.99 % 76.04 %	19.87 % 21.40 %	2.14 % 2.56 %
Finance	5187 5060	4202 4068	882 852	103 140	81.01 % 80.40 %	17.00 % 16.84 %	1.99 % 2.77 %
Health	4990 4980	4089 3959	799 890	102 131	81.94 % 79.50 %	16.01 % 17.87 %	2.04 % 2.63 %
Pets	5064 5077	3908 3892	1048 1051	108 134	77.17 % 76.66 %	20.70 % 20.70 %	2.13 % 2.64 %
Sport & Fitness	4964 5187	3838 3937	1030 1106	96 144	77.32 % 75.90 %	20.75 % 21.32 %	1.93 % 2.78 %
Job & Career	4917 5011	3695 3700	1123 1189	99 122	75.15 % 73.84 %	22.84 % 23.73 %	2.01 % 2.43 %
Dating	4963 5086	3653 3651	1210 1303	100 132	73.60 % 71.79 %	24.38 % 25.62 %	2.01 % 2.60 %
Other	5019 5152	3994 4027	913 993	112 132	79.58 % 78.16 %	18.19 % 19.27 %	2.23 % 2.56 %

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	4490 4727	3294 3484	1111 1128	85 115	73.36 % 73.70 %	24.74 % 23.86 %	1.89 % 2.43 %
Outlook Mail	4554 4400	3450 3264	1009 1018	95 118	75.76 % 74.18 %	22.16 % 23.14 %	2.09 % 2.68 %
Yahoo Mail	4733 4699	3613 3522	1022 1049	98 128	76.34 % 74.95 %	21.59 % 22.32 %	2.07 % 2.72 %
AOL Mail	4753 4621	3652 3484	1003 1013	98 124	76.84 % 75.39 %	21.10 % 21.92 %	2.06 % 2.68 %
Mail.com	4829 4980	3857 3850	871 1004	101 126	79.87 % 77.31 %	18.04 % 20.16 %	2.09 % 2.53 %
Yandex Mail	4621 4626	3537 3497	990 1015	94 114	76.54 % 75.59 %	21.42 % 21.94 %	2.03 % 2.46 %
GMX Mail	4662 4608	3517 3420	1045 1072	100 116	75.44 % 74.22 %	22.42 % 23.26 %	2.15 % 2.52 %
Zoho Mail	4636 4815	3676 3732	865 958	95 125	79.29 % 77.51 %	18.66 % 19.90 %	2.05 % 2.60 %
ProtonMail	4513 4573	3599 3605	831 850	83 118	79.75 % 78.83 %	18.41 % 18.59 %	1.84 % 2.58 %
Custom Mail	4622 4742	3768 3741	751 883	103 118	81.52 % 78.89 %	16.25 % 18.62 %	2.23 % 2.49 %
iCloud Mail	4550 4615	3366 3379	1091 1109	93 127	73.98 % 73.22 %	23.98 % 24.03 %	2.04 % 2.75 %
Tuta	4689 4704	3755 3681	835 896	99 127	80.08 % 78.25 %	17.81 % 19.05 %	2.11 % 2.70 %
Juno.com	4771 4580	3796 3593	880 873	95 114	79.56 % 78.45 %	18.44 % 19.06 %	1.99 % 2.49 %
Mailfence	4496 4767	3603 3740	804 904	89 123	80.14 % 78.46 %	17.88 % 18.96 %	1.98 % 2.58 %

Compare Postmark with other providers

Compare the email deliverability of Postmark with other providers.