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What is Winnr?

Winnr is an all-in-one platform designed for the cold email infrastructure, efficiently managing the complete sending process. Users can effortlessly register outreach domains through the user-friendly dashboard and establish SMTP mailboxes that include pre-set DKIM, SPF, and DMARC records, while also engaging in an automated warmup procedure. A unified inbox gathers responses from every mailbox, allowing users to export credentials to various tools like Smartlead or Instantly with just one click. Furthermore, agencies and resellers can programmatically oversee their infrastructure using REST API and webhooks, enhancing their operational efficiency. The platform’s continuous deliverability monitoring identifies potential DNS drift and blacklist issues before they can impact email campaigns. Compared to juggling multiple Google Workspace inboxes, Winnr not only cuts down costs but also shortens the setup time from several days to just a few minutes, proving to be an essential asset for effective outreach. This groundbreaking solution not only simplifies email management but also empowers teams to refine their email outreach strategies without the complexities of conventional setups. By leveraging Winnr, organizations can focus their efforts on crafting compelling messages rather than worrying about technical complications.

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.

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Integrations Supported

Integrations Supported

Claude
Codex CLI
FetchSandbox
Gmail
LangChain
Microsoft Outlook
Model Context Protocol (MCP)
Python
Ruby
Slack
Vercel AI SDK
Zapier
n8n

API Availability

API Availability

Has API

Pricing Information

$69/month

Pricing Information

$0.15 per 1000 emails
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub
Online Training
On-Site Training

Company Facts

Organization Name

Winnr

Date Founded

2024

Company Location

United States

Company Website

winnr.app

Company Facts

Organization Name

Sendmux

Date Founded

2026

Company Location

Australia

Company Website

sendmux.ai

Categories and Features

Cold Email

Not specified

Categories and Features

Agentic AI

Not specified

Email APIs

Not specified

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