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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.

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Decision summary

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

Strongest overall

Mailinabox

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

Fastest prototype

Mailinabox

Best first install candidate based on install readiness and adoption.

Freshest repo

Checkdmarc

Most recent maintenance signal among this shortlist.

SignalCheckdmarc

A parser for SPF and DMARC DNS records

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.

Zero

Experience email the way you want with Mail0 – the first open source email app that puts your privacy and safety first. Join the discord: https://mail0.link/discord

Mailu

Insular email distribution - mail server as Docker images

Quality
82/100
Strong
100/100
Excellent
100/100
Excellent
100/100
Excellent
Decision verdict
81/100
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.

Adoption316 stars
0 installs
15K stars
0 installs
11K stars
0 installs
7.3K stars
0 installs
FreshnessJun 17, 2026May 24, 2026May 26, 2026May 31, 2026
Use-case fit
Workflow automationDocument processingCoding agents
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 hintsPython, Email, Claude CodePython, Email, Claude CodeTypeScript, Email, Claude CodePython, 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
OpenAgentSkill engagement0 views
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Install
$ npx skills add domainaware/checkdmarc
$ npx skills add mail-in-a-box/mailinabox
$ npx skills add Mail-0/Zero
$ npx skills add Mailu/Mailu