Sendmux

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Australia HQFounded 2013

Deployment

Overview

About Sendmux

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.

At a glance

Software information

Industries served, licensing and the support Sendmux provides.

Industries

  • Computer-software
  • Information-technology-services
  • Marketing-advertising

Licensing

  • Proprietary
  • Quote Based
  • One-Time Payment
  • Free version

Support

  • Email
  • Live Chat
  • 24x7 Support

Training

  • Documentation
  • In-person
Languages (1)
English
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Capabilities

Sendmux features

The full feature set, grouped by module.

AI Agent Builders

  • Workflow Automation & Integrations
  • Security & Compliance Features
  • Personalization & User Profiling
  • Analytics & Reporting
  • API & Webhook Support
  • Agent Creation & Management
  • Pre-Built Templates & Customization

AI Automation Tools

  • API & Webhook Support
  • Compliance & Audit Trails
  • Context-Aware Automation
  • Pre-Built Automation Templates
  • Real-Time & Scheduled Execution
  • Third-Party Integrations
  • Workflow Monitoring & Logs
  • Workflow Automation Builder
  • Security & Data Encryption
  • Predictive Automation
  • Human-in-the-Loop Controls
  • Low-Code / No-Code Interface
  • Error Handling & Retry Mechanisms
  • AI-Driven Decision Making

Email Management

  • Archiving & Retention
  • Email Monitoring
  • Queue Manager
  • Routing
  • Whitelisting/Blacklisting
  • AI Features
  • Response Management
  • Multiple Accounts
  • Signature Management

Email Marketing

  • A/B Testing
  • Auto-Responders
  • Automation
  • Dynamic Content
  • Event Triggered Email
  • Reporting & Analytics
  • Subscriber Management
  • CAN SPAM Compliance
  • Drip Campaigns

Plans

Sendmux pricing

Free Version
Yes
Payment Frequency
Quote Based, One-Time Payment
Preferred Currency
USD ($)
Sendmux pricing is built for AI agent teams that want real inboxes, controlled sending, and live email events without seat or mailbox charges. Standard inbound email and outbound email through your own providers cost $0.15 per 1,000 messages. Managed Amazon SES sending costs $0.25 per 1,000 messages. Mailbox storage is $0.02 per GB per month. There are no minimum commitments, and new teams can start with a managed Amazon SES route capped at 50 emails per day without a credit card.

Media

Screenshots & video