Alternatives

Astroid alternatives for AI agents.

Compare similar skills by workflow fit, trust score, quality, GitHub adoption, maintenance, and install readiness.

Current skill

Astroid

A graphical threads-with-tags style, lightweight and fast, e-mail client for Notmuch

70
Quality
80
Trust
638
Stars
#1

Himalaya

Similarity 125Trust 92Excellent 100

CLI to manage emails

6.4K starsJun 12, 2026 pushproductivity-automationRustEmail
$ npx skills add pimalaya/himalaya
#2

Mailspring

Similarity 119Trust 98Excellent 100

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

18K starsJun 15, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add Foundry376/Mailspring
#3

PHPMailer

Similarity 119Trust 95Excellent 100

The classic email sending library for PHP

22K starsJun 6, 2026 pushproductivity-automationPHPEmail
$ npx skills add PHPMailer/PHPMailer
#4

Novu

Similarity 119Trust 91Excellent 100

The open-source communication infrastructure for agents and products

39K starsJun 16, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add novuhq/novu
#5

Mailinabox

Similarity 119Trust 98Excellent 100

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.

15K starsMay 24, 2026 pushproductivity-automationPythonEmail
$ npx skills add mail-in-a-box/mailinabox
#6

BillionMail

Similarity 119Trust 98Excellent 100

BillionMail gives you open-source MailServer, NewsLetter, Email Marketing โ€” fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: https://discord.gg/asfXzBUhZr

15K starsJun 11, 2026 pushproductivity-automationGoEmail
$ npx skills add Billionmail/BillionMail
#7

React Email

Similarity 119Trust 95Excellent 100

๐Ÿ’Œ Build and send emails using React

19K starsJun 12, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add resend/react-email
#8

Mjml

Similarity 119Trust 95Excellent 100

MJML: the only framework that makes responsive-email easy

18K starsJun 12, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add mjmlio/mjml
#9

Cloud Mail

Similarity 119Trust 98Excellent 100

A Cloudflare-based email service | ๅŸบไบŽ Cloudflare ็š„้‚ฎ็ฎฑๆœๅŠก | Cloudflare Email ้‚ฎ็ฎฑ Mail

11K starsJun 9, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add maillab/cloud-mail
#10

Zero

Similarity 118Trust 98Excellent 100

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

11K starsMay 26, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add Mail-0/Zero
#11

Thunderbird Android

Similarity 118Trust 95Excellent 100

Thunderbird for Android โ€“ Open Source Email App for Android (fka K-9 Mail)

14K starsJun 16, 2026 pushproductivity-automationKotlinEmail
$ npx skills add thunderbird/thunderbird-android
#12

Logto

Similarity 118Trust 95Excellent 100

๐Ÿง‘โ€๐Ÿš€ Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

12K starsJun 16, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add logto-io/logto
#13

Nodemailer

Similarity 118Trust 91Excellent 100

โœ‰๏ธ Send e-mails with Node.JS โ€“ easy as cake!

18K starsJun 15, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add nodemailer/nodemailer
#14

Frappe

Similarity 118Trust 95Excellent 100

Low code web framework for real world applications, in Python and Javascript

10K starsJun 16, 2026 pushproductivity-automationPythonEmail
$ npx skills add frappe/frappe
#15

Tutanota

Similarity 118Trust 97Excellent 100

Tuta is an email service with a strong focus on security and privacy that lets you encrypt emails, contacts and calendar entries on all your devices.

7.7K starsJun 16, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add tutao/tutanota
#16

Sieve

Similarity 118Trust 87Excellent 87

Sieve Script Editor

882 starsJun 10, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add thsmi/sieve

How to choose

When should you switch?

Use an alternative when it has a clearer install path, higher trust score, fresher maintenance, or better platform fit for your current agent stack. Keep Astroid if it already passes your workflow test and repository review.

Next step

Compare top candidates side by side

Open the compare page, test the install commands in a sandbox, and check each repository before using a skill in production.