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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

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

Strongest overall

Thunderbird Android

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

Fastest prototype

Thunderbird Android

Best first install candidate based on install readiness and adoption.

Freshest repo

Thunderbird Android

Most recent maintenance signal among this shortlist.

SignalFairEmail

Fully featured, open source, privacy friendly email app for Android

Deltachat Android

Decentralized private messenger with chat-shared tools and games for Android

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

Thunderbird Android

Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)

Quality
100/100
Excellent
100/100
Excellent
100/100
Excellent
100/100
Excellent
Decision verdict
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.

100/100
Production-ready

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

Adoption4.4K stars
0 installs
1.7K stars
0 installs
11K stars
0 installs
14K stars
0 installs
FreshnessJun 15, 2026Jun 15, 2026May 26, 2026Jun 16, 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 hintsJava, Email, Claude CodeJava, Email, Claude CodeTypeScript, Email, Claude CodeKotlin, 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 · 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 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 M66B/FairEmail
$ npx skills add deltachat/deltachat-android
$ npx skills add Mail-0/Zero
$ npx skills add thunderbird/thunderbird-android