AWeber

ActiveCampaign blends email marketing, marketing automation, and CRM into one platform. Known for its sophisticated automation builder and excellent email deliverability.

Formerly Sendinblue, Brevo offers an affordable all-in-one marketing platform with CRM, email marketing, SMS, and chat. Known for its generous free plan and pay-as-you-go pricing.

The world's most recognisable email marketing platform, now owned by Intuit. Mailchimp has expanded into basic CRM, landing pages, and social media management.

ConvertKit is an email marketing platform built specifically for creators, bloggers, podcasters, and online course makers. It focuses on simplicity and deliverability, with powerful tagging and automation features that help creators build and monetise their audiences without needing a technical background.

Klaviyo is the email and SMS marketing platform of choice for e-commerce businesses. Deeply integrated with Shopify, WooCommerce, and other e-commerce platforms, it uses customer data to power highly personalised email and SMS campaigns that drive revenue. Known for its powerful segmentation, predictive analytics, and revenue attribution.

Constant Contact is one of the longest-running email marketing platforms, trusted by small businesses for over 25 years. It offers straightforward email marketing with event management, social media tools, and e-commerce features. Known for excellent customer support and an easy learning curve.