Skill comparison
Compare agent skills before installing.
Comparing 4 skills
Use this as a shortlist, then open the skill detail page before adopting.
Decision summary
React Email is the strongest overall pick here because it has a 100/100 readiness score and fits Workflow automation.
Strongest overall
React Email
Use this as a leading candidate, then validate the README and install path in your own agent stack.
Fastest prototype
React Email
Best first install candidate based on install readiness and adoption.
Freshest repo
Postsrsd
Most recent maintenance signal among this shortlist.
| Signal | Postsrsd Postfix Sender Rewriting Scheme daemon | React Email 💌 Build and send emails using React | Mailinabox Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box. | BillionMail BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: https://discord.gg/asfXzBUhZr |
|---|---|---|---|---|
| Quality | 72/100 Strong | 100/100 Excellent | 100/100 Excellent | 100/100 Excellent |
| Decision verdict | 71/100 Prototype first Prototype with this skill first; keep a fallback candidate ready. | 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. |
| Adoption | 359 stars Verified outcomes are shown on each skill page | 19K stars Verified outcomes are shown on each skill page | 15K stars Verified outcomes are shown on each skill page | 15K stars Verified outcomes are shown on each skill page |
| Freshness | Jun 20, 2026 | Jun 12, 2026 | May 24, 2026 | Jun 11, 2026 |
| Use-case fit | ||||
| Workflow fit | ||||
| Platform hints | C, Email, Claude Code | TypeScript, Email, Claude Code | Python, Email, Claude Code | Go, Email, Claude Code |
| Warnings | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet |
| Best for | Workflow automation workflows · Claude Code teams · builders willing to evaluate younger projects | Workflow automation workflows · Claude Code teams · teams that value GitHub adoption signals | Workflow automation workflows · Claude Code teams · teams that value GitHub adoption signals | Workflow automation workflows · Claude Code teams · teams that value GitHub adoption signals |
| Not ideal for | teams that need a vendor-supported SLA · high-compliance environments without internal security review | teams that need a vendor-supported SLA · high-compliance environments without internal security review | teams that need a vendor-supported SLA · high-compliance environments without internal security review | teams that need a vendor-supported SLA · high-compliance environments without internal security review |
| OpenAgentSkill engagement | 0 views 0 install copies | 0 views 0 install copies | 0 views 0 install copies | 0 views 0 install copies |
| Install | $ npx skills add roehling/postsrsd | $ npx skills add resend/react-email | $ npx skills add mail-in-a-box/mailinabox | $ npx skills add Billionmail/BillionMail |