Best Alternatives to Send16 MCP

Nitrosend

Runtime: npx

AI-native email marketing. Campaigns, automations, transactional, contacts, and analytics.

Threadline MCP

Runtime: npx

Agent-to-agent messaging relay. Discover agents, send messages, and receive replies. Zero-config.

SenderKit

Runtime: npx

Build and send email, SMS, and push straight from your AI agent.

Atomic Mail

Runtime: npx

Programmable email inbox for AI agents — JMAP, PoW auth, stdio MCP server.

MCP Emails

Runtime: npx

Read, search, send, organize, draft and schedule email across your inboxes from any MCP client.

Microsoft Outlook MCP

Runtime: npx

Microsoft Outlook (mail) MCP server — read, search, and send email through Microsoft Graph.

Mailbuttons

Runtime: npx

Governed email for AI agents: sandbox inboxes, server-side policy gate, tamper-evident audit.

Line Bot MCP Server

Runtime: npx

Verified

Connects an AI agent to LINE Messaging API for messaging, user profiles, quotas, followers, and rich-menu management.

Abnormal Security MCP

Runtime: npx

Abnormal Security email threats, cases, and reporting in your terminal and your AI agents.

Sentfromai MCP

Runtime: npx

Email for AI agents: inboxes, send/reply/forward, search, threads, webhooks — 21 SentFromAI tools.

HQBase

Runtime: Remote (SSE)

Connect AI agents to your self-hosted HQBase shared email workspace.

Outlook MCP

Runtime: npx

Microsoft Outlook MCP server — 20 tools for email, calendar, contacts, and settings via Graph API.