
Mailchimp
8.3#1 in email marketing softwareFrom $13 a monthFree planAndroidiOSWebAPI
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| Fact | Mailchimp | Substack |
|---|---|---|
| Audience segmentation | Yes | Yes |
| Company size | LinkedIn lists Mailchimp as an Atlanta-based private company with 1,001–5,000 employees. | LinkedIn lists 51–200 employees, while Crunchbase lists headcount in the 101–250 range. |
| Email automation | Yes | Yes |
| Free plan | Yes | Yes |
| Integrations | Mailchimp advertises more than 300 integrations, including Shopify, WooCommerce, Canva, Zapier, Salesforce, WordPress, Stripe and QuickBooks Online. | Official integrations include RSS, podcast distribution to Apple and Spotify, Google Analytics 4, Google Tag Manager, X and Facebook pixels, Google site verification, YouTube and LinkedIn account connections. |
| Rating on Apple App Store | 4.9 out of 5 from 52K ratings | 4.9 out of 5 from 540K ratings |
| Rating on Capterra | 4.5 out of 5 from 17,528 reviews | 0 out of 5 from 0 reviews |
| Rating on G2 | 4.3 out of 5 from 18,430 reviews | 4.3 out of 5 from 17 reviews |
Mailchimp suits people who need email campaigns alongside automation, segmentation, landing pages, or A/B testing. Its free plan may fit smaller contact lists and modest monthly sending needs.
Substack suits writers, journalists, podcasters, video creators, experts, educators, and media companies building a direct subscriber audience. It is useful for creators who want multiple media formats, audience discovery, segmentation, email automation, and paid subscription options.