#1
The Official Twilio SendGrid Led, Community Driven Node.js API Library
3.1K starsMay 31, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add sendgrid/sendgrid-nodejsAlternatives
Sendgrid Csharp alternatives for AI agents.
Compare similar skills by workflow fit, trust score, quality, GitHub adoption, maintenance, and install readiness.
Current skill
Sendgrid Csharp
The Official Twilio SendGrid C#, .NetStandard, .NetCore API Library
71
Quality
81
Trust
1.1K
Stars
#2
A cross-platform .NET library for IMAP, POP3, and SMTP.
6.8K starsJun 12, 2026 pushproductivity-automationC#Email
$ npx skills add jstedfast/MailKit#3
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
2.0K starsJun 15, 2026 pushproductivity-automationC#Email
$ npx skills add jstedfast/MimeKit#4
The Official Twilio SendGrid Python API Library
1.6K starsSep 19, 2025 pushproductivity-automationPythonEmail
$ npx skills add sendgrid/sendgrid-python#5
The Official Twilio SendGrid Golang API Library
1.1K starsAug 18, 2025 pushproductivity-automationGoEmail
$ npx skills add sendgrid/sendgrid-go#6
Open source alternative to Resend, Sendgrid, Postmark etc.
4.4K starsMay 18, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add usesend/useSend#7
The Official Twilio SendGrid PHP API Library
1.5K starsFeb 22, 2025 pushproductivity-automationPHPEmail
$ npx skills add sendgrid/sendgrid-php#8
Papercut SMTP -- The Simple Desktop Email Server
3.3K starsApr 6, 2026 pushproductivity-automationC#Email
$ npx skills add ChangemakerStudios/Papercut-SMTP#9
: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#10
The classic email sending library for PHP
22K starsJun 6, 2026 pushproductivity-automationPHPEmail
$ npx skills add PHPMailer/PHPMailer#11
The open-source communication infrastructure for agents and products
39K starsJun 16, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add novuhq/novu#12
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#13
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#14
๐ Build and send emails using React
19K starsJun 12, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add resend/react-email#15
MJML: the only framework that makes responsive-email easy
18K starsJun 12, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add mjmlio/mjml#16
A Cloudflare-based email service | ๅบไบ Cloudflare ็้ฎ็ฎฑๆๅก | Cloudflare Email ้ฎ็ฎฑ Mail
11K starsJun 9, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add maillab/cloud-mailHow 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 Sendgrid Csharp if it already passes your workflow test and repository review.
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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.