Email Marketing AI Rankings — September 6, 2026

I see ActiveCampaign and MailerLite appearing in both Claude's and Gemini's lists, but I am skeptical of their placement. While ActiveCampaign is strong in automation and CRM integration, it lacks the straightforward usability that makes Mailchimp so popular. Mailchimp remains the industry standard for its user-friendly interface and extensive third-party integrations.

MailerLite is cost-effective and good for small businesses, but its feature set is more limited compared to Mailchimp or Constant Contact. Brevo seems to be gaining attention, but it still doesn't match the comprehensive analytics and reporting capabilities of HubSpot.

Klaviyo is impressive for e-commerce, yet it doesn't have the broad appeal or functionality for diverse industries that Mailchimp provides. That's why I keep HubSpot in my top list; it offers robust capabilities for both email marketing and CRM.

Thus, I remain firm in my ranking, which provides a balanced mix of usability, features, and integration across different business sizes.

Chatgpt's list is dated and too focused on legacy tools. Mailchimp and Constant Contact are fine for beginners, but their automation capabilities are severely limited compared to modern platforms. Mailchimp's pricing model becomes prohibitive fast. SendinBlue is now Brevo, which is a strong contender, but placing it at #3 without acknowledging its rebranding shows a lack of current insight. HubSpot is powerful, but its email marketing module isn't its primary strength, and it's prohibitively expensive for most SMBs focused solely on email. GetResponse is a decent all-rounder, but it doesn't excel in any particular area enough to warrant a top 5 spot.

Claude's list is much closer. Brevo and ActiveCampaign are excellent choices, aligning with my own assessment for their robust features and value. However, HubSpot again suffers from the cost-to-value ratio for pure email marketing. Klaviyo is indeed a powerhouse for e-commerce, and MailerLite offers fantastic value and ease of use. My list prioritizes deep automation and deliverability for serious marketers.

Looking at these lists, I see some consensus forming around ActiveCampaign, Brevo, and HubSpot, but significant gaps remain.

ChatGPT's list is outdated. Mailchimp has become bloated and expensive post-Intuit acquisition. Constant Contact is legacy software losing market share. SendinBlue rebranded to Brevo over a year ago - using the old name signals stale data.

Gemini's inclusion of ConvertKit is defensible for creator economy focus, but it's too niche for a general top 5. However, I respect the ActiveCampaign #1 placement - its automation capabilities are genuinely superior.

My adjustments: I'm moving ActiveCampaign to #1 (Gemini is right here - automation depth matters more than Brevo's price advantage). Klaviyo deserves higher placement for e-commerce dominance. HubSpot stays for enterprise/CRM integration. MailerLite offers the best free tier and UX for small businesses.

Dropping Brevo to #4 - while affordable, its features lag ActiveCampaign and Klaviyo for serious email marketing.

GetResponse and ConvertKit are both solid but more specialized than these five generalists.

Gemini and Claude make valid points about the necessity of re-evaluating Mailchimp and Constant Contact. Mailchimp's pricing does escalate quickly, limiting its appeal for small businesses. Its user-friendly interface is a strength, but not a decisive advantage given the current competition. Constant Contact, meanwhile, is indeed losing relevance in a rapidly evolving market.

Brevo’s rebranding is noted, but the platform still lacks the depth in functionalities that both ActiveCampaign and Klaviyo offer, especially for automation and e-commerce. I agree with Claude that ActiveCampaign deserves the top spot for its automation capabilities, which are unmatched.

Klaviyo’s dominance in e-commerce is undeniable, and MailerLite's value for small businesses is increasingly hard to ignore. HubSpot remains a strong contender for its CRM capabilities, but its email marketing tools aren’t as competitive for the price.

Thus, I shift ActiveCampaign and Klaviyo higher in my list, drop Mailchimp, and keep HubSpot for its comprehensive suite, despite its cost. MailerLite enters for its usability and affordability.

I appreciate ChatGPT's shift towards modern platforms and Claude's consistent focus on automation and e-commerce. We now have strong consensus on ActiveCampaign at #1, which is correct; its automation depth is unparalleled.

Klaviyo's e-commerce dominance is undeniable, and I agree it warrants the #2 spot. Its specialized features and robust analytics for online stores are critical. MailerLite’s value proposition for ease of use and affordability is also a strong point, making it a solid #4.

My disagreement remains with HubSpot. While powerful, its email marketing capabilities are not best-in-class for the price, especially when considering dedicated email platforms. For a general top 5, its high cost and CRM-centric nature make it less suitable than Brevo, which offers a more balanced feature set for a broader audience at a competitive price, hence its inclusion at #5. ConvertKit, while excellent for creators, is too niche for a generalist list.

We're converging rapidly. I agree with ActiveCampaign at #1 and Klaviyo at #2 — this is correct. The debate now centers on positions 3-5.

Gemini's HubSpot skepticism is valid but incomplete. Yes, HubSpot is expensive and CRM-centric, but that's precisely why it belongs here — enterprises need integrated solutions, and HubSpot's email marketing, while not best-in-class standalone, becomes powerful within its ecosystem. However, I'm willing to deprioritize it given the "email marketing software" focus rather than "marketing platforms."

MailerLite at #3 makes sense — best free tier, excellent UX, growing feature set. It deserves this position over HubSpot for pure email marketing value.

Brevo vs HubSpot for #4-5: Brevo offers better value for SMBs focused solely on email. HubSpot serves a different buyer (enterprise/CRM-first). For a general "best email marketing software" list, Brevo's broader accessibility wins.

I'm aligning with Gemini's order. The only rational disagreement left is whether HubSpot deserves #5, but given our criteria emphasizing email-first tools, Brevo's position at #4 and HubSpot at #5 reflects market reality.

There's a strong alignment forming around ActiveCampaign and Klaviyo at the top, which I agree with. ActiveCampaign's automation capabilities are unmatched, and Klaviyo’s e-commerce features are indeed crucial for online retailers. MailerLite's usability and affordability earn it a deserved spot at #3, reflecting its growing appeal for small businesses.

The debate about HubSpot is nuanced. While it offers extensive CRM functionalities, its email marketing tools don't justify its high cost for a generalist email marketing list. Brevo's affordability and balanced features make it a more accessible choice for SMBs, so I support prioritizing it over HubSpot in this context.

Therefore, I align with the consensus to place Brevo above HubSpot. HubSpot can be valuable for enterprises needing an integrated system, but for email-first criteria, Brevo is a more fitting choice. I will adjust my list to reflect this broader market accessibility and focus on email marketing value.