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About

Resend is a cloud-based email delivery platform that enables developers and businesses to send transactional and marketing emails through APIs, SDKs, and SMTP. The platform supports automated emails such as account verification messages, password resets, notifications, receipts, and customer communications. Its developer tools include a REST API, software development kits for multiple programming languages, and React Email integration for building reusable email templates. Resend also provides marketing email capabilities, including contact management, audience segmentation, broadcast campaigns, and a visual email editor. Email monitoring features include delivery tracking, open and click analytics, bounce reporting, webhooks, and detailed API logs. The platform offers domain authentication, deliverability monitoring, dedicated IP addresses, and automated workflows to help organizations manage email communications at scale.

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 Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Software developers, SaaS companies, startup founders, application engineers, DevOps teams, product teams, digital marketers, ecommerce businesses, and organizations seeking programmable email delivery, transactional messaging, marketing automation, contact management, and email performance monitoring

Audience

AI agent builders that need an email API for AI agents

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Supported
24/7 Live Support Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$20 per month
Free Version Supported
Free Trial Not Supported

Pricing

$0.15 per 1000 emails
Free Version Supported
Free Trial Not Supported

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:

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Pros & Cons from Real Users

Pros

  • Having the ability to send transactional emails via API makes integrating Resend into an application significantly easier. We set up Resend to handle key transactional emails such as verifying accounts, sending forgot password emails and notifications about usage in our customer accounts. It was easy for our developers to integrate and the pricing scales nicely.

Cons

  • To be honest as long as you know that Resend is designed for transactional emails, and not marketing emails, there's no major negatives of the platform itself. I would have given it 5 stars, but the jump in pricing to have 7 day data retention is higher than I would have liked.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Supported

Company Information

Resend
Founded: 2023
United States
resend.com

Company Information

Sendmux
Founded: 2026
Australia
sendmux.ai

Alternatives

Alternatives

BlueFox Email

BlueFox Email

Innovaris Group
EmailLabs

EmailLabs

Vercom
SendHQ

SendHQ

Vynara Technologies

Categories

Email APIs Supported

Categories

Agentic AI Supported
Email APIs Supported

Integrations

FetchSandbox Supported
Python Supported
Ruby Supported
Axis LMS Supported
Claude Not Supported
Codepilot Supported
Create Next Startup Supported
DwellTrack Supported
Flue Supported
Gmail Not Supported
Mailrith Supported
Marina Mate Pro Supported
Microsoft Outlook Not Supported
MigmaAI Supported
Roomote Supported
Spire Supported
UnderPeaks Supported
Vercel AI SDK Not Supported
Webdone Supported
Workers by Delos Supported

Integrations

FetchSandbox Supported
Python Supported
Ruby Supported
Axis LMS Not Supported
Claude Supported
Codepilot Not Supported
Create Next Startup Not Supported
DwellTrack Not Supported
Flue Not Supported
Gmail Supported
Mailrith Not Supported
Marina Mate Pro Not Supported
Microsoft Outlook Supported
MigmaAI Not Supported
Roomote Not Supported
Spire Not Supported
UnderPeaks Not Supported
Vercel AI SDK Supported
Webdone Not Supported
Workers by Delos Not Supported
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