Email Marketing Tools in 2026: Mailchimp vs Constant Contact vs Brevo vs Campaign Monitor

Email marketing remains one of the highest-ROI channels in the MarTech stack. But with dozens of platforms competing for your business, choosing the right one can be overwhelming.

I evaluated four leading email marketing platforms — Mailchimp, Constant Contact, Brevo (formerly Sendinblue), and Campaign Monitor — across deliverability rates, automation capabilities, template design, and pricing.

Deliverability Comparison

Mailchimp consistently achieves 97-99% inbox placement rates, thanks to its long-standing relationships with major ISPs. Constant Contact offers similar deliverability but with better whitelist support for nonprofits. Brevo's deliverability varies by region — strong in Europe, slightly weaker in APAC. Campaign Monitor offers reliable delivery but lacks the advanced authentication protocols that enterprise senders require.

Automation Capabilities

Mailchimp leads with behavioral triggers, predictive sending, and customer journey builder. Brevo offers the best value-for-money automation, with robust workflows at lower price points. Constant Contact's automation is adequate for basic welcome series and birthday emails but lacks complex conditional branching.

Pricing

Mailchimp: Free up to 500 contacts, paid from $13/mo. Brevo: Free up to 300 emails/day, paid from $25/mo. Constant Contact: From $20/mo. Campaign Monitor: From $9/mo (limited features).

Verdict

Choose Mailchimp for best-in-class automation and deliverability. Choose Constant Contact if you need phone support (rare in this space). Choose Brevo for the best value across email + SMS. Choose Campaign Monitor if design templates are your top priority.