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
76.208 77.376	59.446 58.851	15.216 16.516	1.546 2.009

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 (%)
78.00 % 76.06 %	19.97 % 21.35 %	2.03 % 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	5962 5909	4609 4440	1237 1299	116 170	77.31 % 75.14 %	20.75 % 21.98 %	1.95 % 2.88 %
Elektronics	5746 5925	4487 4507	1135 1276	124 142	78.09 % 76.07 %	19.75 % 21.54 %	2.16 % 2.40 %
Entertainment	5767 5885	4475 4452	1177 1281	115 152	77.60 % 75.65 %	20.41 % 21.77 %	1.99 % 2.58 %
Cosmetics & Beauty	5867 6227	4599 4782	1151 1289	117 156	78.39 % 76.79 %	19.62 % 20.70 %	1.99 % 2.51 %
Food & Drink	5848 5860	4519 4417	1222 1298	107 145	77.27 % 75.38 %	20.90 % 22.15 %	1.83 % 2.47 %
Home & Garden	5964 5802	4638 4390	1204 1255	122 157	77.77 % 75.66 %	20.19 % 21.63 %	2.05 % 2.71 %
Finance	6130 6052	4988 4809	1017 1080	125 163	81.37 % 79.46 %	16.59 % 17.85 %	2.04 % 2.69 %
Health	5936 5852	4850 4597	963 1112	123 143	81.70 % 78.55 %	16.22 % 19.00 %	2.07 % 2.44 %
Pets	6013 5969	4653 4523	1238 1290	122 156	77.38 % 75.77 %	20.59 % 21.61 %	2.03 % 2.61 %
Sport & Fitness	5783 6013	4507 4597	1161 1262	115 154	77.94 % 76.45 %	20.08 % 20.99 %	1.99 % 2.56 %
Job & Career	5694 5970	4272 4390	1306 1438	116 142	75.03 % 73.53 %	22.94 % 24.09 %	2.04 % 2.38 %
Dating	5757 5874	4271 4241	1375 1471	111 162	74.19 % 72.20 %	23.88 % 25.04 %	1.93 % 2.76 %
Other	5741 6038	4578 4706	1030 1165	133 167	79.74 % 77.94 %	17.94 % 19.29 %	2.32 % 2.77 %

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	5221 5498	3883 4015	1236 1347	102 136	74.37 % 73.03 %	23.67 % 24.50 %	1.95 % 2.47 %
Outlook Mail	5281 5450	4016 4036	1158 1268	107 146	76.05 % 74.06 %	21.93 % 23.27 %	2.03 % 2.68 %
Yahoo Mail	5483 5564	4202 4177	1170 1237	111 150	76.64 % 75.07 %	21.34 % 22.23 %	2.02 % 2.70 %
AOL Mail	5582 5387	4329 4058	1136 1189	117 140	77.55 % 75.33 %	20.35 % 22.07 %	2.10 % 2.60 %
Mail.com	5748 5602	4587 4317	1051 1144	110 141	79.80 % 77.06 %	18.28 % 20.42 %	1.91 % 2.52 %
Yandex Mail	5529 5579	4238 4177	1173 1266	118 136	76.65 % 74.87 %	21.22 % 22.69 %	2.13 % 2.44 %
GMX Mail	5207 5520	3936 4113	1164 1260	107 147	75.59 % 74.51 %	22.35 % 22.83 %	2.05 % 2.66 %
Zoho Mail	5432 5492	4256 4223	1070 1119	106 150	78.35 % 76.89 %	19.70 % 20.38 %	1.95 % 2.73 %
ProtonMail	5417 5503	4360 4269	958 1086	99 148	80.49 % 77.58 %	17.69 % 19.73 %	1.83 % 2.69 %
Custom Mail	5335 5501	4329 4341	889 1021	117 139	81.14 % 78.91 %	16.66 % 18.56 %	2.19 % 2.53 %
iCloud Mail	5272 5570	3941 4087	1219 1338	112 145	74.75 % 73.38 %	23.12 % 24.02 %	2.12 % 2.60 %
Tuta	5623 5715	4510 4450	999 1120	114 145	80.21 % 77.87 %	17.77 % 19.60 %	2.03 % 2.54 %
Juno.com	5731 5583	4578 4370	1029 1068	124 145	79.88 % 78.27 %	17.95 % 19.13 %	2.16 % 2.60 %
Mailfence	5347 5412	4281 4218	964 1053	102 141	80.06 % 77.94 %	18.03 % 19.46 %	1.91 % 2.61 %

Compare Postmark with other providers

Compare the email deliverability of Postmark with other providers.