SendGrid

OpenSend is a self-hosted transactional and marketing email platform built on Amazon SES for sending transactional mail, newsletters, and campaigns. It provides a dashboard, a TypeScript SDK distributed as the `opensend-js` npm package, and an MCP server over one public API; the video also describes send simulation and delivery-status logs. The project supports Docker or Cloudflare deployment, uses Google-only sign-in, keeps API-secret setup out of the browser, and recommends starting with simulated sending before provisioning infrastructure or sending real email.

Resend is a cloud-hosted email delivery service for developers that sends transactional and marketing email at scale. Operated by Resend, it accepts email content and recipient data and produces delivered messages plus delivery metrics and deliverability tooling for websites and applications. The product is presented as an API-first service for integrating email sending into developer workflows.

CogSend is a self-hosted social media scheduler that runs on the user's Cloudflare account. It lets users write a draft, customize it per platform, add images and alt text, automatically split long drafts into threads, and publish immediately or schedule posts for Mastodon, Bluesky, LinkedIn, Threads, and X. The scheduler reports delivery results per account, retries temporary failures, and supports cancellation, rescheduling, and manual retries; it also provides link previews and publication-failure insights. The application stores data in Cloudflare D1 and media in R2, sends posts through the user's API credentials, encrypts credentials, and protects the administrator account with two-factor authentication. It provides a personal API key and an MCP server for scripts, Shortcuts, Claude Code, Codex, or other MCP clients to draft, schedule, and publish posts. It is built with SvelteKit on Cloudflare Workers, uses Drizzle with D1 SQLite, and is licensed under the MIT License.

Gmail is an email service developed and operated by Google that provides web-based email, POP/IMAP access, storage, spam filtering, and integration with other Google services. It was launched in 2004 and is available for individual and enterprise (Google Workspace) users.

Smarter Contact is a cloud-based CRM and marketing automation platform that helps businesses engage and nurture leads, measure campaign performance, and manage sales to accelerate deal closures. The service is offered via a subscription model and advertises a free trial.