Best Alternatives to Sendable

Send transactional email from your editor — describe the event, Sendable writes and sends it.

SenderKit

Runtime: npx

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

Abnormal Security MCP

Runtime: npx

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

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.

Threadline MCP

Runtime: npx

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

Nitrosend

Runtime: npx

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

LayerCall

Runtime: npx

Score an IP, email, phone, domain or device for fraud in one call, with the signals behind it.

Mailbuttons

Runtime: npx

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

Send transactional email and manage domains, audiences, and broadcasts from any MCP client.

Envloped

Runtime: Remote (SSE)

Send transactional email, verify domains, build contact segments, and draft marketing campaigns.

Slack MCP Server

Runtime: npx

MCP server providing Slack workspace data access with message history, threads, DMs, user info, and optional message posting.

Microsoft Outlook MCP

Runtime: npx

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