Every SaaS company eventually faces this decision: Mailchimp's familiar interface or Brevo's aggressive pricing. We've implemented both platforms extensively, managing everything from 5K subscriber lists to 500K+ enterprise deployments.
The choice isn't obvious. Mailchimp dominates mindshare but struggles with deliverability at scale. Brevo (formerly Sendinblue) offers superior inbox rates but lacks some advanced features. Both platforms have evolved significantly in 2025-2026, making older comparisons obsolete.
This analysis draws from our direct experience managing email campaigns across B2B SaaS, e-commerce, and professional services clients. We'll cover the actual performance differences, hidden costs, and deployment friction you won't find in generic reviews.
The short answer
Our verdict
Brevo wins on cost and deliverability, Mailchimp wins on automation complexity.
Choose Brevo if you prioritize inbox placement and cost control. Our clients averaged 23% higher open rates and 40% lower monthly costs compared to equivalent Mailchimp plans. The platform excels for straightforward email marketing with basic automation needs.
Choose Mailchimp if you need sophisticated automation workflows or extensive app integrations. Despite deliverability challenges, Mailchimp's automation builder handles complex customer journeys that would require custom development in Brevo. The learning curve is steeper but capabilities run deeper.
How they actually differ in deployment
Deliverability represents the biggest operational difference. Across our client base, Brevo consistently achieves 4-6 percentage points higher inbox placement rates. This stems from their dedicated IP allocation at lower subscriber thresholds and stronger sender reputation management.
Automation complexity favors Mailchimp heavily. Brevo's workflow builder handles linear sequences well but struggles with complex branching logic. Mailchimp supports advanced conditional splits, behavioral triggers, and multi-path journeys that Brevo simply can't match without significant workarounds.
Integration ecosystems also diverge significantly. Mailchimp's app marketplace includes 300+ native integrations versus Brevo's 150+. However, Brevo's API documentation is cleaner and their webhook reliability has been superior in our experience.
Pricing structures create different scaling patterns. Brevo charges based on emails sent rather than contacts stored, making it dramatically cheaper for businesses with large lists but infrequent campaigns. Mailchimp's contact-based pricing penalizes list growth regardless of engagement levels.
Actual costs in 2026
Brevo's pricing starts at $25/month for 20K emails with unlimited contacts, scaling to $65/month for 100K emails. Enterprise plans begin at $1,000/month for advanced features and dedicated IP allocation. The pay-per-email model dramatically favors businesses with large, less-active lists.
Mailchimp's contact-based pricing starts at $13/month for 500 contacts, jumping to $350/month for 10K contacts on the Standard plan. Premium features require the Premium tier at $350/month minimum. Enterprise plans start at $3,500/month but include advanced automation and priority support.
Hidden costs differ significantly. Brevo includes SMS credits and phone support across all paid plans. Mailchimp charges extra for SMS ($20/month), phone support (Premium only), and advanced segmentation features. These add-ons can double your effective monthly cost.
Try Brevo
Try Brevo → What we’d actually deploy
For most B2B SaaS companies, we deploy Brevo as the primary email platform with HubSpot or Close handling CRM functions. This combination delivers superior deliverability at 60% lower cost than Mailchimp-based stacks, while maintaining necessary automation capabilities through the CRM layer.
Enterprise clients requiring complex multi-touch nurture sequences still get Mailchimp deployments, typically integrated with Salesforce and supplemented by dedicated deliverability tools. Our Enterprise consulting tier includes detailed deliverability optimization and custom automation buildouts that maximize Mailchimp's advanced capabilities while mitigating its inbox placement challenges.
Frequently asked questions
Answered by The Editor, with notes from Atlas and Roxy.
Which platform has better deliverability rates?
Brevo consistently outperforms Mailchimp in our testing, averaging 94% inbox placement versus 89% for Mailchimp. This difference stems from Brevo's dedicated IP allocation and stronger sender reputation management across their network.
Can Brevo handle complex email automation workflows?
Brevo's automation capabilities are limited to basic linear sequences and simple conditional logic. For complex multi-path customer journeys, Mailchimp's automation builder is significantly more powerful, though you'll pay a premium for these features.
How do the pricing models actually compare for growing businesses?
Brevo charges per email sent while Mailchimp charges per contact stored. Brevo becomes dramatically cheaper for businesses with large lists but infrequent campaigns, while Mailchimp can be more cost-effective for frequent emailers with smaller lists.
Which platform integrates better with CRM systems?
Mailchimp offers more native CRM integrations and deeper data sync capabilities. Brevo's API is cleaner and more reliable, but requires more technical setup for complex CRM workflows.
Do both platforms include SMS marketing capabilities?
Brevo includes SMS credits and capabilities across all paid plans. Mailchimp requires a separate SMS add-on starting at $20/month, making Brevo more cost-effective for multi-channel campaigns.
Which platform is better for e-commerce businesses?
Mailchimp's extensive e-commerce integrations and advanced segmentation make it superior for online retail. The abandoned cart automation and product recommendation features are more sophisticated than Brevo's basic e-commerce tools.
