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Skill comparison

Compare agent skills before installing.

Put high-signal skills side by side and inspect quality, adoption, freshness, install readiness, use-case fit, and warnings in one place.

Comparing 4 skills

Use this as a shortlist, then open the skill detail page before adopting.

Add more skills

Decision summary

PHPMailer is the strongest overall pick here because it has a 100/100 readiness score and fits Workflow automation.

Strongest overall

PHPMailer

Use this as a leading candidate, then validate the README and install path in your own agent stack.

Fastest prototype

PHPMailer

Best first install candidate based on install readiness and adoption.

Freshest repo

Mailspring

Most recent maintenance signal among this shortlist.

SignalVmime

VMime Mail Library

PHPMailer

The classic email sending library for PHP

Mailspring

:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.

Nodemailer

✉️ Send e-mails with Node.JS – easy as cake!

Quality
76/100
Strong
100/100
Excellent
100/100
Excellent
100/100
Excellent
Decision verdict
75/100
Strong shortlist

Shortlist this skill and compare it with close alternatives before production adoption.

100/100
Production-ready

Use this as a leading candidate, then validate the README and install path in your own agent stack.

100/100
Production-ready

Use this as a leading candidate, then validate the README and install path in your own agent stack.

100/100
Production-ready

Use this as a leading candidate, then validate the README and install path in your own agent stack.

Adoption301 stars
0 installs
22K stars
0 installs
18K stars
0 installs
18K stars
0 installs
FreshnessMar 24, 2026Jun 6, 2026Jun 15, 2026Jun 15, 2026
Use-case fit
Workflow automationCoding agentsRAG and knowledge
Workflow automationCoding agentsRAG and knowledge
Workflow automationCoding agentsRAG and knowledge
Workflow automationCoding agentsRAG and knowledge
Stack fit
Content growth agentCoding review agent
Content growth agentCoding review agent
Content growth agentCoding review agent
Content growth agentCoding review agent
Platform hintsC++, Email, Claude CodePHP, Email, Claude CodeJavaScript, Email, Claude CodeJavaScript, Email, Claude Code
WarningsNo OpenAgentSkill engagement data yetNo OpenAgentSkill engagement data yetNo OpenAgentSkill engagement data yetNo OpenAgentSkill engagement data yet
Best forWorkflow automation workflows · Claude Code teams · builders willing to evaluate younger projectsWorkflow automation workflows · Claude Code teams · teams that value GitHub adoption signalsWorkflow automation workflows · Claude Code teams · teams that value GitHub adoption signalsWorkflow automation workflows · Claude Code teams · teams that value GitHub adoption signals
Not ideal forteams that need a vendor-supported SLA · high-compliance environments without internal security reviewteams that need a vendor-supported SLA · high-compliance environments without internal security reviewteams that need a vendor-supported SLA · high-compliance environments without internal security reviewteams that need a vendor-supported SLA · high-compliance environments without internal security review
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Install
$ npx skills add kisli/vmime
$ npx skills add PHPMailer/PHPMailer
$ npx skills add Foundry376/Mailspring
$ npx skills add nodemailer/nodemailer