cold-email vs webiny-mailer-smtp
cold-email and webiny-mailer-smtp are both agent skills for email. cold-email is published by coreyhaines31 and webiny-mailer-smtp by webiny. Both install in Claude Code, Claude apps, Codex and Cursor. On GitHub, cold-email has 56,355 stars and webiny-mailer-smtp has 8,047. Both were last active in Oct 2026. The table lines up where they differ (publisher, GitHub stars and category) and has the install commands for both. Everything here comes from the listings' public sources and is refreshed daily. cold-email describes itself as: Write and run B2B cold outbound that gets replies, from cold emails and follow-ups to sending setup, LinkedIn, multichannel cadences, and reply handling. webiny-mailer-smtp: Use when configuring SMTP email/mailer settings in a Webiny project. Licenses: cold-email MIT, webiny-mailer-smtp unknown.
Updated Oct 26, 2026 · Built from catalog data; how we rank and grade
cold-email
coreyhaines31
Write and run B2B cold outbound that gets replies, from cold emails and follow-ups to sending setup, LinkedIn, multichannel cadences, and reply handling.
webiny-mailer-smtp
webiny
Use when configuring SMTP email/mailer settings in a Webiny project.
Who should pick which
- cold-email has the larger community: 56,355 GitHub stars against 8,047.
From listing data only. We don't pick a winner on security beyond the grades; read how grades work.
Side by side
| Fact | cold-email | webiny-mailer-smtp |
|---|---|---|
| Type | Skill | Skill |
| Publisher | coreyhaines31 | webiny |
| License | MIT | License unknown |
| Pricing | free | free |
| Runs | Not stated | Not stated |
| Auth | Not stated | Not stated |
| Hosts supported | Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf | Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf |
| Tools | Not listed yet | Not listed yet |
| Security grade | –Security: not graded yet | –Security: not graded yet |
| Freshness grade | AFreshness: A | AFreshness: A |
| GitHub stars | 56,355 | 8,047 |
| Weekly downloads | Not measured | Not measured |
| Last release | Oct 19, 2026 | Oct 20, 2026 |
| Last activity | Oct 19, 2026 | Oct 20, 2026 |
Facts from each listing's public sources, checked daily. Tool lists arrive with tool scans.
Install
cold-email
npx skills add coreyhaines31/marketingskills --skill cold-email
Asks which agents to install it for (add -g for all projects). Needs Node.js 22.20+.
webiny-mailer-smtp
npx skills add webiny/webiny-js --skill webiny-mailer-smtp
Asks which agents to install it for (add -g for all projects). Needs Node.js 22.20+.
Also consider
- 0.837score
cloudflare-email-service
cloudflareOfficial
Implement or troubleshoot Cloudflare Email Sending and Email Routing integrations and their delivery configuration.
SkillAFreshness: A★ 3.2KClaude Code +9 - 0.806score
email-marketing-bible
george-hartley
Email marketing operating manual for AI agents, with hard send-safety gates.
SkillAFreshness: A★ 353Claude Code +9 - 0.796score
agent-email-inbox
resendOfficial
Use when building any system where email content triggers actions — AI agent inboxes, automated support handlers, email-to-task pipelines, or any workflow…
SkillAFreshness: A★ 205Claude Code +9
Questions
- Is cold-email or webiny-mailer-smtp more popular?
- cold-email has more GitHub stars (56,355 against 8,047). Stars measure attention, not quality, so check freshness and docs too.
- Do cold-email and webiny-mailer-smtp work with Claude Code?
- Yes, both list a Claude Code install; the commands are on this page.
- Are cold-email and webiny-mailer-smtp open source?
- cold-email is open source (MIT); the other is unknown.
Related
Cite this page
cold-email vs webiny-mailer-smtp. Agent Mart. https://agentmart.dev/compare/coreyhaines31-cold-email-vs-webiny-webiny-mailer-smtp (last updated 2026-10-26)