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
436.716 44.308	334.666 36.117	85.970 6.404	16.080 1.787

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 (%)
76.63 % 81.51 %	19.69 % 14.45 %	3.68 % 4.03 %

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	33707 3433	26813 2867	5793 434	1101 132	79.55 % 83.51 %	17.19 % 12.64 %	3.27 % 3.85 %
Elektronics	33735 3414	26154 2823	6409 466	1172 125	77.53 % 82.69 %	19.00 % 13.65 %	3.47 % 3.66 %
Entertainment	33216 3342	25344 2714	6602 492	1270 136	76.30 % 81.21 %	19.88 % 14.72 %	3.82 % 4.07 %
Cosmetics & Beauty	33580 3358	25695 2715	6651 496	1234 147	76.52 % 80.85 %	19.81 % 14.77 %	3.67 % 4.38 %
Food & Drink	33653 3326	26800 2816	5749 407	1104 103	79.64 % 84.67 %	17.08 % 12.24 %	3.28 % 3.10 %
Home & Garden	34056 3410	27087 2873	5864 419	1105 118	79.54 % 84.25 %	17.22 % 12.29 %	3.24 % 3.46 %
Finance	33485 3489	24596 2723	7534 579	1355 187	73.45 % 78.05 %	22.50 % 16.60 %	4.05 % 5.36 %
Health	33764 3338	25060 2671	7402 516	1302 151	74.22 % 80.02 %	21.92 % 15.46 %	3.86 % 4.52 %
Pets	32846 3502	25927 2892	5758 472	1161 138	78.94 % 82.58 %	17.53 % 13.48 %	3.53 % 3.94 %
Sport & Fitness	33031 3373	25021 2723	6728 521	1282 129	75.75 % 80.73 %	20.37 % 15.45 %	3.88 % 3.82 %
Job & Career	33466 3392	25014 2684	7067 555	1385 153	74.74 % 79.13 %	21.12 % 16.36 %	4.14 % 4.51 %
Dating	34524 3355	24682 2663	8403 554	1439 138	71.49 % 79.37 %	24.34 % 16.51 %	4.17 % 4.11 %
Other	33653 3576	26473 2953	6010 493	1170 130	78.66 % 82.58 %	17.86 % 13.79 %	3.48 % 3.64 %

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	42797 3380	31217 2556	9797 635	1783 189	72.94 % 75.62 %	22.89 % 18.79 %	4.17 % 5.59 %
Outlook Mail	42276 3267	31349 2603	9233 527	1694 137	74.15 % 79.68 %	21.84 % 16.13 %	4.01 % 4.19 %
Yahoo Mail	42686 3432	32512 2776	8550 518	1624 138	76.17 % 80.89 %	20.03 % 15.09 %	3.80 % 4.02 %
AOL Mail	43038 3495	32769 2818	8653 522	1616 155	76.14 % 80.63 %	20.11 % 14.94 %	3.75 % 4.43 %
Mail.com	42806 3428	33015 2808	8220 481	1571 139	77.13 % 81.91 %	19.20 % 14.03 %	3.67 % 4.05 %
Yandex Mail	42868 3340	32101 2660	9112 534	1655 146	74.88 % 79.64 %	21.26 % 15.99 %	3.86 % 4.37 %
GMX Mail	42687 3391	33001 2828	8193 430	1493 133	77.31 % 83.40 %	19.19 % 12.68 %	3.50 % 3.92 %
Zoho Mail	42895 3521	33477 2938	7985 457	1433 126	78.04 % 83.44 %	18.62 % 12.98 %	3.34 % 3.58 %
ProtonMail	42174 3357	33117 2836	7632 398	1425 123	78.52 % 84.48 %	18.10 % 11.86 %	3.38 % 3.66 %
Custom Mail	42398 3365	33784 2852	7220 408	1394 105	79.68 % 84.75 %	17.03 % 12.12 %	3.29 % 3.12 %
iCloud Mail	3462 3409	2688 2622	590 619	184 168	77.64 % 76.91 %	17.04 % 18.16 %	5.31 % 4.93 %
Tuta	3355 3543	2855 2971	405 456	95 116	85.10 % 83.86 %	12.07 % 12.87 %	2.83 % 3.27 %
Juno.com	3274 3380	2781 2849	380 419	113 112	84.94 % 84.29 %	11.61 % 12.40 %	3.45 % 3.31 %

Compare MailChimp with other providers

Compare the email deliverability of MailChimp with other providers.