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
77.364 77.377	60.340 59.263	15.418 16.280	1.606 1.834

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 (%)
77.99 % 76.59 %	19.93 % 21.04 %	2.08 % 2.37 %

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	6125 6015	4737 4543	1265 1315	123 157	77.34 % 75.53 %	20.65 % 21.86 %	2.01 % 2.61 %
Elektronics	5829 5993	4554 4631	1152 1231	123 131	78.13 % 77.27 %	19.76 % 20.54 %	2.11 % 2.19 %
Entertainment	5939 5899	4607 4481	1218 1279	114 139	77.57 % 75.96 %	20.51 % 21.68 %	1.92 % 2.36 %
Cosmetics & Beauty	5972 6021	4699 4690	1157 1197	116 134	78.68 % 77.89 %	19.37 % 19.88 %	1.94 % 2.23 %
Food & Drink	5914 5782	4591 4401	1211 1246	112 135	77.63 % 76.12 %	20.48 % 21.55 %	1.89 % 2.33 %
Home & Garden	6083 5876	4729 4474	1227 1257	127 145	77.74 % 76.14 %	20.17 % 21.39 %	2.09 % 2.47 %
Finance	5980 6015	4887 4788	957 1078	136 149	81.72 % 79.60 %	16.00 % 17.92 %	2.27 % 2.48 %
Health	6023 5920	4892 4696	1009 1090	122 134	81.22 % 79.32 %	16.75 % 18.41 %	2.03 % 2.26 %
Pets	6058 5977	4677 4543	1257 1286	124 148	77.20 % 76.01 %	20.75 % 21.52 %	2.05 % 2.48 %
Sport & Fitness	5761 5999	4496 4594	1142 1265	123 140	78.04 % 76.58 %	19.82 % 21.09 %	2.14 % 2.33 %
Job & Career	5954 6103	4491 4526	1339 1440	124 137	75.43 % 74.16 %	22.49 % 23.59 %	2.08 % 2.24 %
Dating	5963 5847	4403 4248	1436 1457	124 142	73.84 % 72.65 %	24.08 % 24.92 %	2.08 % 2.43 %
Other	5763 5930	4577 4648	1048 1139	138 143	79.42 % 78.38 %	18.18 % 19.21 %	2.39 % 2.41 %

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	5361 5633	3973 4144	1270 1357	118 132	74.11 % 73.57 %	23.69 % 24.09 %	2.20 % 2.34 %
Outlook Mail	5479 5493	4166 4102	1206 1261	107 130	76.04 % 74.68 %	22.01 % 22.96 %	1.95 % 2.37 %
Yahoo Mail	5570 5663	4261 4284	1199 1244	110 135	76.50 % 75.65 %	21.53 % 21.97 %	1.97 % 2.38 %
AOL Mail	5446 5531	4213 4203	1110 1194	123 134	77.36 % 75.99 %	20.38 % 21.59 %	2.26 % 2.42 %
Mail.com	5653 5532	4514 4291	1027 1112	112 129	79.85 % 77.57 %	18.17 % 20.10 %	1.98 % 2.33 %
Yandex Mail	5609 5570	4327 4223	1168 1221	114 126	77.14 % 75.82 %	20.82 % 21.92 %	2.03 % 2.26 %
GMX Mail	5412 5556	4097 4157	1202 1266	113 133	75.70 % 74.82 %	22.21 % 22.79 %	2.09 % 2.39 %
Zoho Mail	5461 5370	4290 4153	1060 1083	111 134	78.56 % 77.34 %	19.41 % 20.17 %	2.03 % 2.50 %
ProtonMail	5591 5485	4497 4281	986 1066	108 138	80.43 % 78.05 %	17.64 % 19.43 %	1.93 % 2.52 %
Custom Mail	5358 5348	4335 4248	915 976	108 124	80.91 % 79.43 %	17.08 % 18.25 %	2.02 % 2.32 %
iCloud Mail	5528 5411	4107 3976	1298 1307	123 128	74.29 % 73.48 %	23.48 % 24.15 %	2.23 % 2.37 %
Tuta	5765 5676	4608 4454	1039 1096	118 126	79.93 % 78.47 %	18.02 % 19.31 %	2.05 % 2.22 %
Juno.com	5695 5700	4582 4490	982 1073	131 137	80.46 % 78.77 %	17.24 % 18.82 %	2.30 % 2.40 %
Mailfence	5436 5409	4370 4257	956 1024	110 128	80.39 % 78.70 %	17.59 % 18.93 %	2.02 % 2.37 %

Compare Postmark with other providers

Compare the email deliverability of Postmark with other providers.