Alternatives

Check If Email Exists alternatives for AI agents.

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

Current skill

Check If Email Exists

Check if an email address exists without sending any email, written in Rust. Comes with a ⚙️ HTTP backend.

96
Quality
87
Trust
8.8K
Stars
#1

Lettre

Similarity 137Trust 92Excellent 100

a mailer library for Rust

2.2K starsJun 12, 2026 pushproductivity-automationRustEmail
$ npx skills add lettre/lettre
#2

Mailchecker

Similarity 131Trust 95Excellent 100

:mailbox: Cross-language temporary (disposable/throwaway) email detection library. Covers 55 734+ fake email providers.

1.9K starsJun 16, 2026 pushproductivity-automationPHPEmail
$ npx skills add FGRibreau/mailchecker
#3

Truemail

Similarity 131Trust 84Strong 71

🚀 Configurable framework agnostic plain Ruby 📨 email validator/verifier. Verify email via Regex, DNS, SMTP and even more. Be sure that email address valid and exists.

1.3K starsApr 23, 2024 pushproductivity-automationRubyEmail
$ npx skills add truemail-rb/truemail
#4

PHPMailer

Similarity 127Trust 96Excellent 100

The classic email sending library for PHP

22K starsJun 6, 2026 pushproductivity-automationPHPEmail
$ npx skills add PHPMailer/PHPMailer
#5

React Email

Similarity 127Trust 95Excellent 100

💌 Build and send emails using React

19K starsJun 12, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add resend/react-email
#6

Alertmanager

Similarity 125Trust 94Excellent 100

Prometheus Alertmanager

8.5K starsJun 16, 2026 pushproductivity-automationGoEmail
$ npx skills add prometheus/alertmanager
#7

App

Similarity 125Trust 94Excellent 100

The SimpleLogin back-end and web app

6.7K starsJun 12, 2026 pushproductivity-automationPythonEmail
$ npx skills add simple-login/app
#8

Notify

Similarity 124Trust 95Excellent 100

A dead simple Go library for sending notifications to various messaging services.

3.7K starsJun 15, 2026 pushproductivity-automationGoEmail
$ npx skills add nikoksr/notify
#9

UseSend

Similarity 124Trust 93Excellent 100

Open source alternative to Resend, Sendgrid, Postmark etc.

4.4K starsMay 18, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add usesend/useSend
#10

Disposable Email Domains

Similarity 124Trust 90Excellent 100

a list of disposable email domains

5.1K starsJun 16, 2026 pushproductivity-automationPythonEmail
$ npx skills add disposable-email-domains/disposable-email-domains
#11

Yagmail

Similarity 123Trust 93Excellent 100

Send email in Python conveniently for gmail using yagmail

2.7K starsMay 26, 2026 pushproductivity-automationPythonEmail
$ npx skills add kootenpv/yagmail
#12

Rust Imap

Similarity 122Trust 86Excellent 85

IMAP client library for Rust

575 starsJun 8, 2026 pushproductivity-automationRustEmail
$ npx skills add jonhoo/rust-imap
#13

Himalaya

Similarity 122Trust 90Excellent 100

CLI to manage emails

6.4K starsJun 12, 2026 pushproductivity-automationRustEmail
$ npx skills add pimalaya/himalaya
#14

Go Mail

Similarity 122Trust 92Excellent 100

📧 Easy to use, yet comprehensive library for sending mails with Go

1.4K starsJun 15, 2026 pushproductivity-automationGoEmail
$ npx skills add wneessen/go-mail
#15

Inky

Similarity 120Trust 80Strong 75

An email framework that converts simple HTML into responsive email-ready HTML.

697 starsApr 24, 2026 pushproductivity-automationRustEmail
$ npx skills add foundation/inky
#16

Novu

Similarity 119Trust 92Excellent 100

The open-source communication infrastructure for agents and products

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

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 Check If Email Exists 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.