MailChimp and Postmark Email Deliverability Comparison

In this comparison, the deliverability of MailChimp and Postmark 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 MailChimp.

Emails Sent	Emails Inbox	Emails Spam	Emails Lost
454.379 62.077	349.090 50.973	88.530 8.694	16.759 2.410

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 MailChimp in this comparison.

Inbox (%)	Spam (%)	Lost (%)
76.83 % 82.11 %	19.48 % 14.01 %	3.69 % 3.88 %

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	35081 4830	27966 4056	5966 592	1149 182	79.72 % 83.98 %	17.01 % 12.26 %	3.28 % 3.77 %
Elektronics	35085 4784	27271 3986	6590 631	1224 167	77.73 % 83.32 %	18.78 % 13.19 %	3.49 % 3.49 %
Entertainment	34505 4674	26407 3825	6789 665	1309 184	76.53 % 81.84 %	19.68 % 14.23 %	3.79 % 3.94 %
Cosmetics & Beauty	34947 4777	26813 3902	6851 679	1283 196	76.72 % 81.68 %	19.60 % 14.21 %	3.67 % 4.10 %
Food & Drink	35135 4630	28031 3945	5937 545	1167 140	79.78 % 85.21 %	16.90 % 11.77 %	3.32 % 3.02 %
Home & Garden	35372 4818	28187 4086	6028 570	1157 162	79.69 % 84.81 %	17.04 % 11.83 %	3.27 % 3.36 %
Finance	34806 4847	25639 3831	7757 783	1410 233	73.66 % 79.04 %	22.29 % 16.15 %	4.05 % 4.81 %
Health	35129 4745	26161 3829	7614 712	1354 204	74.47 % 80.70 %	21.67 % 15.01 %	3.85 % 4.30 %
Pets	34197 4821	27046 4013	5941 627	1210 181	79.09 % 83.24 %	17.37 % 13.01 %	3.54 % 3.75 %
Sport & Fitness	34396 4709	26119 3824	6936 710	1341 175	75.94 % 81.21 %	20.17 % 15.08 %	3.90 % 3.72 %
Job & Career	34819 4745	26087 3782	7293 759	1439 204	74.92 % 79.70 %	20.95 % 16.00 %	4.13 % 4.30 %
Dating	35895 4746	25765 3771	8635 765	1495 210	71.78 % 79.46 %	24.06 % 16.12 %	4.16 % 4.42 %
Other	35012 4951	27598 4123	6193 656	1221 172	78.82 % 83.28 %	17.69 % 13.25 %	3.49 % 3.47 %

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 MailChimp.

Provider	Emails Sent	Emails Inbox	Emails Spam	Emails Lost	Inbox (%)	Spam (%)	Lost (%)
Gmail	44099 4728	32207 3610	10048 871	1844 247	73.03 % 76.35 %	22.79 % 18.42 %	4.18 % 5.22 %
Outlook Mail	43654 4561	32443 3660	9453 713	1758 188	74.32 % 80.25 %	21.65 % 15.63 %	4.03 % 4.12 %
Yahoo Mail	44057 4764	33629 3877	8754 699	1674 188	76.33 % 81.38 %	19.87 % 14.67 %	3.80 % 3.95 %
AOL Mail	44353 4865	33832 3963	8851 705	1670 197	76.28 % 81.46 %	19.96 % 14.49 %	3.77 % 4.05 %
Mail.com	44138 4799	34113 3957	8405 651	1620 191	77.29 % 82.45 %	19.04 % 13.57 %	3.67 % 3.98 %
Yandex Mail	44334 4676	33262 3761	9344 724	1728 191	75.03 % 80.43 %	21.08 % 15.48 %	3.90 % 4.08 %
GMX Mail	44042 4739	34126 3982	8370 585	1546 172	77.49 % 84.03 %	19.00 % 12.34 %	3.51 % 3.63 %
Zoho Mail	44249 4909	34612 4131	8162 614	1475 164	78.22 % 84.15 %	18.45 % 12.51 %	3.33 % 3.34 %
ProtonMail	43516 4740	34251 4028	7796 546	1469 166	78.71 % 84.98 %	17.92 % 11.52 %	3.38 % 3.50 %
Custom Mail	43754 4800	34935 4082	7391 561	1428 157	79.84 % 85.04 %	16.89 % 11.69 %	3.26 % 3.27 %
iCloud Mail	4808 4793	3742 3721	831 844	235 228	77.83 % 77.63 %	17.28 % 17.61 %	4.89 % 4.76 %
Tuta	4695 4930	3969 4153	577 616	149 161	84.54 % 84.24 %	12.29 % 12.49 %	3.17 % 3.27 %
Juno.com	4680 4773	3969 4048	548 565	163 160	84.81 % 84.81 %	11.71 % 11.84 %	3.48 % 3.35 %

Compare MailChimp with other providers

Compare the email deliverability of MailChimp with other providers.