Sendmux Description

Sendmux provides AI agents with dedicated inboxes and a streamlined method for sending emails. Each agent is capable of receiving communications, reviewing conversation threads, managing attachments, replying to messages, and reacting to incoming mail through signed webhooks or Server-Sent Events.

Teams can utilize various sending methods including Gmail OAuth, Outlook OAuth, SMTP providers, or managed Amazon SES, allowing for flexibility in their email communications. Additionally, Sendmux offers the ability to distribute sending across different providers using features like weighted routing, sender-domain routing, health checks, failover mechanisms, and customizable quotas based on time intervals such as seconds, minutes, hours, or days.

For developers, the platform includes Mailbox, Sending, and Management APIs, comprehensive OpenAPI documentation, SDKs, the sendmux CLI, and MCP tools, along with Sendmux Skills. Moreover, the system ensures tenant isolation, provides mailbox-scoped API keys, supports custom domains, and includes logging and metrics, all while maintaining a usage-based pricing model without imposing fees for each seat or mailbox. This comprehensive approach enhances the overall email management experience for teams and developers alike.

Sendmux Alternatives
InboxAlly Reviews
InboxAlly
(135 Ratings)
InboxAlly is email deliverability software that moves your messages out of spam and promotions and into the primary inbox. It builds and protects sender reputation, warms new domains and IPs automatically, verifies inbox placement across the major mailbox providers, and monitors blacklists in real time. It layers onto any ESP or SMTP setup without changing how you send. Every plan carries a REST API, a dedicated customer success manager and 24/7 live support. Used by marketers, agencies, cold outreach teams and deliverability consultants.
Learn more
Monk Reviews
Monk
(7 Ratings)
Most enterprise invoices are never paid from an emailed invoice. Across the $2B+ in receivables Monk manages, 92% have to be submitted through the buyer accounts payable portal instead, and a failed submission is usually silent. Monk is an AI-native accounts receivable platform built around that problem. It files invoices into more than 600 corporate AP portals, including Coupa, Ariba and SAP Business Network, uploads 87% without a person, and brings each rejection back onto the invoice record with the reason attached. Collections runs on the same data. Julia, the Monk agent for Intelligent Collections, reads inbound replies and answers what the customer wrote instead of advancing a dunning schedule, clearing 90% of invoices without escalation. Outbound mail sends through your existing Gmail or Microsoft 365 mailbox. Payments match at 80%, rising to 95% once rules are added. Runs on QuickBooks, NetSuite or Dynamics 365 Business Central. SOC 2 Type II. Live in one to three days.
Learn more
SendPost Reviews
SendPost
SendPost replaces manual hacks, messy workarounds and daily frustrations associated with your email API/SMTP provider. If you send a few thousand emails, most email API solutions will work well. You will choose one based on its price, features, or support. If you are a big sender, sending millions of emails each month, the real problem is here. This is when managing multiple domains, IP-Pols, and IP/Domain reputation becomes a major headache. Even a small drop in your email open rate, or delivery, can have a significant impact on your revenue. You need a solution that helps you identify the problem and provides quick solutions. You don't want spend hours looking through logs to determine if your domain, IP or sending reputation are low.
Learn more
Maildoso Reviews
Maildoso
Maildoso offers outbound mailboxes tailored for cold emailing, integrating SMTP and Google Workspace systems for quick setup, excellent deliverability, and automatic technical configuration. By enabling teams to diversify their outreach strategies, Maildoso ensures that campaigns are not reliant on a single sender, domain, or provider. Users can effortlessly register new domains or link their existing ones through the dashboard, set up mailbox names, and automatically configure SPF, DKIM, and DMARC, allowing mailboxes to be ready for export and use in outreach platforms within minutes. The platform accommodates SMTP mailboxes, Google Workspace mailboxes, and hybrid configurations, providing teams the flexibility to adapt based on their audience and sending methods. Additionally, Maildoso seamlessly integrates with popular sequencers and outreach tools like Instantly, Smartlead, and Saleshandy, facilitating the swift transition of newly created mailboxes into active campaigns. This streamlined process empowers teams to enhance their cold outreach efforts efficiently.
Learn more

Pricing

Pricing Starts At:
$0.15 per 1000 emails
Free Version:
Yes

Integrations

API:
Yes, Sendmux has an API
View Integrations

Reviews

Total
ease
features
design
support

No User Reviews. Be the first to provide a review:

Write a Review

Company Details

Company:
Sendmux
Year Founded:
2026
Headquarters:
Australia
Website:
sendmux.ai
Update This Listing

Media

Unified Inbox

Unified Inbox

Unified Inbox Dashboard
Recommended Products
MongoDB Atlas runs apps anywhere Icon
MongoDB Atlas runs apps anywhere

Deploy in 115+ regions with the modern database for every enterprise.

MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
Start Free

Product Details

Platforms
Web-Based
Types of Training
Training Docs
Live Training (Online)
In Person
Training Videos
Customer Support
Business Hours
Live Rep (24/7)
Online Support

Sendmux Features and Options

Sendmux User Reviews

Write a Review
  • Previous
  • Next