At a glance

Brevo Buttondown
Best for Small businesses wanting email, SMS, and chat in one Writers wanting a minimal, developer-friendly newsletter tool
Starting price Free Free
Free tier
Open source
Free tier available
Open source
API
CRM
Chat
Email
Markdown
Paid Subscriptions
RSS-to-Email
SMS

Brevo

Strengths

  • Includes Email as a core feature, purpose-built for email marketing workflows
  • Includes SMS as a core feature, purpose-built for email marketing workflows
  • Free for 300 emails/day — generous enough for most small teams to get real work done
  • Established product with 14+ years on the market and a mature ecosystem

Weaknesses

  • Free plan exists but key features are locked behind the paid upgrade
  • Fewer built-in features means you may need additional tools to cover gaps
  • Deliverability depends on your sender reputation, which takes time to build
  • Limited team/admin features if your organization eventually scales up

Buttondown

Strengths

  • Full Markdown support with live preview for clean, structured notes
  • Includes Paid Subscriptions as a core feature, purpose-built for email marketing workflows
  • Free for 100 subscribers — generous enough for most small teams to get real work done
  • Includes api alongside the core feature set — fewer separate tools needed

Weaknesses

  • Free plan exists but key features are locked behind the paid upgrade
  • Developer-oriented tooling may not suit non-technical team members
  • Deliverability depends on your sender reputation, which takes time to build
  • Limited team/admin features if your organization eventually scales up

The bottom line

Pricing: Both tools offer free tiers, so you can test each before committing. Brevo's free plan: Free for 300 emails/day. Buttondown's free plan: Free for 100 subscribers.

Feature gaps: Brevo offers CRM, Chat and Email that Buttondown lacks. Buttondown brings API, Markdown and Paid Subscriptions that Brevo does not have.

Team fit: Brevo is geared toward small teams teams, while Buttondown is aimed at individual users and small setups. Pick the one that matches where your team is today and where it is headed — migrating tools later is always painful.

Where each tool shines: Brevo's biggest strengths are: includes email as a core feature, purpose-built for email marketing workflows. includes sms as a core feature, purpose-built for email marketing workflows. Buttondown's biggest strengths are: full markdown support with live preview for clean, structured notes. includes paid subscriptions as a core feature, purpose-built for email marketing workflows.

Watch out for: With Brevo, users commonly note that free plan exists but key features are locked behind the paid upgrade. With Buttondown, the main complaint is that free plan exists but key features are locked behind the paid upgrade.

Choose Brevo if...

  • You need a tool built for small businesses wanting email, sms, and chat in one
  • You specifically need CRM and Chat
  • You care about includes sms as a core feature, purpose-built for email marketing workflows
  • Your team size fits the small teams profile Brevo is designed for
  • The free tier works for you: free for 300 emails/day

Choose Buttondown if...

  • You need a tool built for writers wanting a minimal, developer-friendly newsletter tool
  • You specifically need API and Markdown
  • You care about includes paid subscriptions as a core feature, purpose-built for email marketing workflows
  • Your team size fits the individuals profile Buttondown is designed for
  • The free tier works for you: free for 100 subscribers

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