What is Sendmux?

Sendmux offers specialized inboxes for AI agents along with an efficient framework for email communication. Each agent can handle incoming messages, assess conversation threads, organize attachments, respond to emails, and interact with new mail via signed webhooks or Server-Sent Events.

Teams have the option to send emails using various methods, including Gmail OAuth, Outlook OAuth, SMTP services, or managed Amazon SES, providing them with flexibility in their email operations. Furthermore, Sendmux allows for the distribution of email sending across multiple providers through features like weighted routing, sender-domain routing, health checks, failover strategies, and customizable quotas that can be set for different timeframes such as seconds, minutes, hours, or days.

Developers benefit from a suite of tools including Mailbox, Sending, and Management APIs, extensive OpenAPI documentation, SDKs, the sendmux CLI, and MCP utilities, along with Sendmux Skills. Additionally, the system guarantees tenant isolation, offers mailbox-specific API keys, accommodates custom domains, and features robust logging and metrics, all while adhering to a usage-based pricing structure that avoids charging per seat or mailbox. This thorough design not only streamlines email management for teams and developers but also enhances their overall communication efficiency. By prioritizing flexibility and functionality, Sendmux positions itself as a pivotal tool in the landscape of email communication solutions.

Pricing

Price Starts At:
$0.15 per 1000 emails
Free Version:
Free Version available.

Screenshots and Video

Unified Inbox

Unified Inbox

Company Facts

Company Name:
Sendmux
Date Founded:
2026
Company Location:
Australia
Company Website:
sendmux.ai
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Product Details

Deployment
SaaS
Training Options
Documentation Hub
Online Training
On-Site Training
Video Library
Support
24 Hour Support
Web-Based Support

Product Details

Target Company Sizes
Individual
1-10
11-50
51-200
201-500
501-1000
1001-5000
5001-10000
10001+
Target Organization Types
Mid Size Business
Small Business
Enterprise
Freelance
Nonprofit
Government
Startup
Supported Languages
English

Sendmux Categories and Features