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One of the OG email newsletter options, Mailchimp has been around for a long time and has established a good reputation. Acquired by Intuit (also owns QBO) in 2021.
Turn emails into revenue | Mailchimp
Win new customers with the #1 email marketing and automations platform that recommends ways to get more opens, clicks, and sales.
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From their website:
"Turn Emails into Revenue: Win new customers with the #1 email marketing and automations platform* that recommends ways to get more opens, clicks, and sales."