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About

We are a team of engineers who love building tools for other engineers. Our goal is to create the email platform we've always wished we had — one that just works. Receive real-time notifications directly to your server. Every time an email is delivered, opened, bounces or a link is clicked. Simulate events and experiment with our API without the risk of accidentally sending real emails to real people. Simulate events and experiment with our API without the risk of accidentally sending real emails to real people. Rely on a platform of reputable IPs used by trustworthy senders with distributed workloads across different IP pools. Get a fully managed dedicated IP that automatically warms up and autoscales based on your sending volume, with no waiting period. Get a fully managed dedicated IP that automatically warms up and autoscales based on your sending volume, with no waiting period.

About

Sendmux gives AI agents their own inbox and a controlled way to send email. Each agent can receive messages, read threads, handle attachments, send replies, and react to new mail through signed webhooks or Server-Sent Events. Teams can send through Gmail OAuth, Outlook OAuth, SMTP providers, or managed Amazon SES. Sendmux can spread sending across providers with weighted routing, sender-domain routing, health checks, failover, and quotas by second, minute, hour, or day. Developers get Mailbox, Sending, and Management APIs, OpenAPI docs, SDKs, the sendmux CLI, MCP tools, and Sendmux Skills. The platform also covers tenant isolation, mailbox-scoped API keys, custom domains, logs, metrics, and usage-based pricing with no per-seat or per-mailbox fees.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Developers looking for an Email API solution

Audience

AI agent builders that need an email API for AI agents

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$20 per month
Free Version
Free Trial

Pricing

$0.15 per 1000 emails
Free Version
Free Trial

Reviews/Ratings

Overall 4.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 4.0 / 5
support 4.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Resend
Founded: 2023
United States
resend.com

Company Information

Sendmux
Founded: 2026
Australia
sendmux.ai

Alternatives

BlueFox Email

BlueFox Email

Innovaris Group

Alternatives

EmailLabs

EmailLabs

Vercom
Mailtrap

Mailtrap

Railsware
Sidemail

Sidemail

Avantis Innovations
SendPost

SendPost

SendWorks
Mail360

Mail360

Zoho

Categories

Categories

Integrations

Arzule
Brainpercent
Codepilot
Indie Starter
Leado
Lovable
Marina Mate Pro
Model Context Protocol (MCP)
Motileo
Node.js
PAX ERP
PeerQuik
Python
Rocket.new
SaaSy Land
ShipAhead
ShipAppsFast
Softgen
Supastarter
next-forge

Integrations

Arzule
Brainpercent
Codepilot
Indie Starter
Leado
Lovable
Marina Mate Pro
Model Context Protocol (MCP)
Motileo
Node.js
PAX ERP
PeerQuik
Python
Rocket.new
SaaSy Land
ShipAhead
ShipAppsFast
Softgen
Supastarter
next-forge
Claim Resend and update features and information
Claim Resend and update features and information
Claim Sendmux and update features and information
Claim Sendmux and update features and information