
Provides deeper e-commerce data integration and advanced segmentation, but steeper learning curve than Mailchimp.
Mailchimp records 10,071,636 monthly visits with +1.1% month-over-month growth and Freemium pricing. Sendmux records 37 monthly visits with -98.3% growth and Free pricing.

Give every AI agent a real inbox and one API to use it
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | mailchi.mp | sendmux.ai |
| Pricing Model | Freemium | Free |
| Monthly Visits | 10.07M (10,071,636) | 37 (37) |
| MoM Traffic Delta | +105.62K (+1.1%) |
| -2.2K (-98.3%) |
| Primary Market & Share | 🇺🇸 United States (54%) | 🇺🇸 United States (100%) |
|---|
| Direct Visits / mo | 5.77M | 12 |
|---|
| User Rating | 4.4 | 4.2 |
|---|
| Supported Platforms | Website | Website |
|---|
AI-assisted email and SMS marketing that turns audiences into customers
Drag-and-drop templates, reusable layouts, and guided steps to design and send newsletters or promotional emails without a designer.
Build automated journeys triggered by signups, purchases, birthdays, or inactivity, including welcome and abandoned-cart series.
Generate draft copy and subject lines, and use data-driven send-time suggestions to improve engagement.
Tag, segment, and filter contacts, and track engagement history in a searchable audience database.

Give every AI agent a real inbox and one API to use it
Provision mailboxes on verified domains or a shared myagent.mx address, with clean JSON output that strips signatures and quotes.
Send over HTTP or SMTP using the same mailbox credential as a Bearer token and SMTP password, with Idempotency-Key retries and attachment support.
Bind keys to providers, delivery groups, weights, and quota windows so traffic stays inside the boundaries you set.
Signed webhooks for delivery and receipt events, an SSE stream for live mailbox clients, and typed change polling for resync.

Provides deeper e-commerce data integration and advanced segmentation, but steeper learning curve than Mailchimp.
Offers robust multi-channel marketing and transactional emails, but with simpler CRM workflows than Mailchimp.
#2
Features a cleaner, more intuitive drag-and-drop editor, but fewer advanced enterprise automation features.


Includes built-in landing page builders and webinars, but interface feels busier than Mailchimp.

SpecialistSpecializes in cold email outreach and deliverability infrastructure rather than inbound newsletter marketing.


Collaborative inbox and email management for teams

Delivers vastly more powerful CRM and complex automation workflows, but less beginner-friendly interface.

SpecialistExcels at generating enterprise-grade on-brand marketing content, but lacks native email delivery infrastructure.

Email an AI assistant and let it run your schedules, inbox and CRM

The universal context engine connecting agents to data, tools, and models

Managed auth and 10,000+ tools for the agents you're building
Fast Apply and agent-tuned inference for coding agents
Provides deeper e-commerce data integration and advanced segmentation, but steeper learning curve than Mailchimp.
Offers robust multi-channel marketing and transactional emails, but with simpler CRM workflows than Mailchimp.
Features a cleaner, more intuitive drag-and-drop editor, but fewer advanced enterprise automation features.
Includes built-in landing page builders and webinars, but interface feels busier than Mailchimp.
SpecialistSpecializes in cold email outreach and deliverability infrastructure rather than inbound newsletter marketing.
Collaborative inbox and email management for teams
Delivers vastly more powerful CRM and complex automation workflows, but less beginner-friendly interface.
SpecialistExcels at generating enterprise-grade on-brand marketing content, but lacks native email delivery infrastructure.
Fast Apply and agent-tuned inference for coding agents