Brevo (formerly Sendinblue): Email, SMS, and CRM Under One Roof

GetResponse packs more into one subscription than most competitors — automation, landing pages, and live webinars — which suits creators who launch cohorts or courses rather than just sending a weekly newsletter. Its content policy is standard mainstream-ESP territory, meaning explicit adult content isn't welcome, so treat it as infrastructure for the SFW side of a launch funnel.

Mailchimp remains the easiest ESP to learn, with polished templates and AI writing assistance baked in, but it's owned by Intuit and has a documented history of aggressively enforcing its adult-content ban — including terminating accounts with little warning. For a mainstream creator brand it's a solid, affordable starting point; for adult creators it's one of the riskiest mainstream choices on this list.

Kit is built specifically for solo creators — the editor, automations, and paid-subscription tools all assume you're monetizing an audience directly, not running enterprise marketing. It's a strong pick for SFW creator newsletters and digital products, but its terms restrict adult content, so explicit creators typically use it (if at all) only for a mainstream funnel that feeds a separate adult platform.

ActiveCampaign is the strongest automation-and-tagging engine on this list, which matters if you're segmenting fans by purchase behavior or funnel stage. But its acceptable-use policy explicitly restricts adult and sexually explicit content, so creators in that niche risk account suspension without warning — treat it as a tool for your SFW brand arm, not your primary adult list.

Mailgun is a transactional email API, not a marketing platform — it's built for developers sending receipts, login codes, and system notifications reliably, not for composing broadcasts to a subscriber list. If you or your dev has a custom membership site or paywall, it's a solid, usage-priced backend, but a non-technical creator looking for a newsletter tool should look elsewhere on this list.

Drip is purpose-built for revenue-driven automation — cart abandonment, post-purchase upsells, win-back flows keyed to actual purchase data — which makes it a strong fit for creators running a real digital-product storefront rather than a plain newsletter. There's no free plan to test it, and its terms follow the standard mainstream restriction against explicit sexual content, so plan for that limitation before connecting a store selling adult material.