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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.

What is Resend?

We are a team of enthusiastic engineers committed to developing specialized tools tailored for our fellow engineers. Our goal is to create the ultimate email platform that fulfills our long-standing vision — one that functions flawlessly and efficiently. You will receive immediate notifications sent straight to your server, alerting you whenever an email is sent, opened, bounced, or when a link is accessed. In addition, our platform allows you to safely simulate events and test our API, which helps prevent any accidental delivery of real emails to unintended recipients. Moreover, our system is backed by trusted IP addresses used by dependable senders, ensuring an even distribution of workload across multiple IP pools. Enjoy the advantages of a fully managed dedicated IP that not only warms up automatically but scales with your sending volume, all without any delays. With our service, you can concentrate on what truly matters: innovating and building, free from the frustrations of conventional email systems. We aim to empower engineers to work more efficiently and creatively by providing a streamlined communication solution.

Media

Media

Integrations Supported

FetchSandbox
Python
Ruby
Axis LMS
Brainpercent
Claude
Indie Starter
Leado
MassageHub
Mimasa AI
Node.js
Nucla
PAX ERP
PHP
SaaSBold
Softgen
ToolSDK.ai
Webleadr
Workers by Delos
Zapier

Integrations Supported

FetchSandbox
Python
Ruby
Axis LMS
Brainpercent
Claude
Indie Starter
Leado
MassageHub
Mimasa AI
Node.js
Nucla
PAX ERP
PHP
SaaSBold
Softgen
ToolSDK.ai
Webleadr
Workers by Delos
Zapier

API Availability

Has API

API Availability

Has API

Pricing Information

$0.15 per 1000 emails
Free Version
Free Trial Offered?

Pricing Information

$20 per month
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Sendmux

Date Founded

2026

Company Location

Australia

Company Website

sendmux.ai

Company Facts

Organization Name

Resend

Date Founded

2023

Company Location

United States

Company Website

resend.com

Categories and Features

Categories and Features

Transactional Email

A/B Testing
Contact Database
Dynamic Content
Email Monitoring
Mailing List Management
Reporting/Analytics
Spam Check
Template Management

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