AdYour product here, seen by people installing AI tools every day
AI Plugin Index
Sponsor slots open: 12 of 12, from $249 a month

Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun vs Agent-Native Brain

Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun and Agent-Native Brain are both communication MCP servers. Agent-Native Brain scores higher (94 vs 16 out of 100). Agent-Native Brain has more GitHub stars (7.4k), and Agent-Native Brain was updated more recently (2 days ago). The table compares them side by side.

Letterkeel: Send Email via SMTP, Resend, SendGrid & MailgunAgent-Native Brain
Score16 / 10094 / 100
What it doesLetterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, PostmarkCited company knowledge from Slack, meetings, transcripts, and decisions
PublisherVerified: cybermax.cybermax-tools.workers.devCommunity: BuilderIO
GradesLicence F, Quality CMaintenance A, Licence A, Quality A
npm downloads a weekNot on npmNot on npm
RunsRemoteRemote
Works withClaude Code, Claude Desktop, Cursor, Codex, Gemini CLI, VS Code, Windsurf, ChatGPTClaude Code, Claude Desktop, Cursor, Codex, Gemini CLI, VS Code, Windsurf, ChatGPT
GitHub stars07,449
Last commit19 Oct 2026
LicenceNone foundMIT
Listed since19 Oct 202619 Oct 2026
Install Letterkeel: Send Email via SMTP, Resend, SendGrid & MailgunInstall Agent-Native Brain

Questions

Is Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun or Agent-Native Brain more popular?

Agent-Native Brain has more GitHub stars: 7,449.

Can I use Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun and Agent-Native Brain together?

Yes. AI assistants can load several MCP servers at once. Install both and the assistant picks the right one for each task.