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
63.961 64.550	50.217 49.829	12.619 13.300	1.413 1.734

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 (%)
78.51 % 77.19 %	19.73 % 20.60 %	2.21 % 2.69 %

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	4804 4681	3757 3583	971 990	105 131	78.21 % 76.54 %	20.21 % 21.15 %	2.19 % 2.80 %
Elektronics	4766 4869	3746 3787	946 975	106 129	78.60 % 77.78 %	19.85 % 20.02 %	2.22 % 2.65 %
Entertainment	5025 5043	3920 3894	1009 1029	117 135	78.01 % 77.22 %	20.08 % 20.40 %	2.33 % 2.68 %
Cosmetics & Beauty	4806 5050	3784 3876	947 1061	99 137	78.73 % 76.75 %	19.70 % 21.01 %	2.06 % 2.71 %
Food & Drink	4939 4904	3846 3763	1009 1059	104 119	77.87 % 76.73 %	20.43 % 21.59 %	2.11 % 2.43 %
Home & Garden	4853 4881	3813 3753	939 1027	111 130	78.57 % 76.89 %	19.35 % 21.04 %	2.29 % 2.66 %
Finance	5124 4977	4152 4025	892 844	110 142	81.03 % 80.87 %	17.41 % 16.96 %	2.15 % 2.85 %
Health	4903 5016	4012 3996	783 922	108 133	81.83 % 79.67 %	15.97 % 18.38 %	2.20 % 2.65 %
Pets	4994 4974	3887 3853	1004 1007	115 135	77.83 % 77.46 %	20.10 % 20.25 %	2.30 % 2.71 %
Sport & Fitness	4948 5070	3871 3892	997 1049	106 142	78.23 % 76.77 %	20.15 % 20.69 %	2.14 % 2.80 %
Job & Career	4860 5029	3703 3778	1080 1146	109 130	76.19 % 75.12 %	22.22 % 22.79 %	2.24 % 2.59 %
Dating	4816 5030	3616 3670	1124 1236	106 136	75.08 % 72.96 %	23.34 % 24.57 %	2.20 % 2.70 %
Other	5123 5026	4110 3959	918 955	117 135	80.23 % 78.77 %	17.92 % 19.00 %	2.28 % 2.69 %

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	4572 4661	3436 3490	1061 1073	95 118	75.15 % 74.88 %	23.21 % 23.02 %	2.08 % 2.53 %
Outlook Mail	4560 4463	3490 3358	972 1004	105 125	76.54 % 75.24 %	21.32 % 22.50 %	2.30 % 2.80 %
Yahoo Mail	4647 4725	3595 3595	968 1025	104 127	77.36 % 76.08 %	20.83 % 21.69 %	2.24 % 2.69 %
AOL Mail	4668 4535	3635 3449	949 974	100 125	77.87 % 76.05 %	20.33 % 21.48 %	2.14 % 2.76 %
Mail.com	4676 4907	3755 3833	833 968	103 132	80.30 % 78.11 %	17.81 % 19.73 %	2.20 % 2.69 %
Yandex Mail	4591 4613	3565 3537	944 998	102 124	77.65 % 76.67 %	20.56 % 21.63 %	2.22 % 2.69 %
GMX Mail	4634 4605	3552 3458	994 1035	110 120	76.65 % 75.09 %	21.45 % 22.48 %	2.37 % 2.61 %
Zoho Mail	4714 4846	3774 3797	866 942	102 131	80.06 % 78.35 %	18.37 % 19.44 %	2.16 % 2.70 %
ProtonMail	4452 4526	3567 3603	824 831	93 119	80.12 % 79.61 %	18.51 % 18.36 %	2.09 % 2.63 %
Custom Mail	4631 4773	3783 3794	756 872	108 127	81.69 % 79.49 %	16.32 % 18.27 %	2.33 % 2.66 %
iCloud Mail	4587 4641	3469 3480	1035 1075	102 133	75.63 % 74.98 %	22.56 % 23.16 %	2.22 % 2.87 %
Tuta	4657 4650	3750 3667	833 877	106 128	80.52 % 78.86 %	17.89 % 18.86 %	2.28 % 2.75 %
Juno.com	4828 4577	3877 3615	887 858	105 118	80.30 % 78.98 %	18.37 % 18.75 %	2.17 % 2.58 %
Mailfence	3744 4028	2969 3153	697 768	78 107	79.30 % 78.28 %	18.62 % 19.07 %	2.08 % 2.66 %

Compare Postmark with other providers

Compare the email deliverability of Postmark with other providers.