#1
The open-source communication infrastructure for agents and products
39K starsJun 16, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add novuhq/novuAlternatives
OneSignal Website SDK alternatives for AI agents.
Compare similar skills by workflow fit, trust score, quality, GitHub adoption, maintenance, and install readiness.
Current skill
OneSignal Website SDK
OneSignal makes engaging customers simple and is the fastest, most reliable service to send push notifications, in-app messages, SMS, and emails. This plugin makes it easy to add OneSignal to your website. https://onesignal.com
78
Quality
79
Trust
407
Stars
#2
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#3
MJML: the only framework that makes responsive-email easy
18K starsJun 12, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add mjmlio/mjml#4
A Cloudflare-based email service | 基于 Cloudflare 的邮箱服务 | Cloudflare Email 邮箱 Mail
11K starsJun 9, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add maillab/cloud-mail#5
✉️ Send e-mails with Node.JS – easy as cake!
18K starsJun 15, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add nodemailer/nodemailer#6
Low code web framework for real world applications, in Python and Javascript
10K starsJun 16, 2026 pushproductivity-automationPythonEmail
$ npx skills add frappe/frappe#7
Prometheus Alertmanager
8.5K starsJun 16, 2026 pushproductivity-automationGoEmail
$ npx skills add prometheus/alertmanager#8
💌 Build and send emails using React
19K starsJun 12, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add resend/react-email#9
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
11K starsMay 26, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add Mail-0/Zero#10
🧑🚀 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#11
CloudFlare free temp domain email 免费收发 临时域名邮箱 支持附件 IMAP SMTP TelegramBot
10.0K starsJun 13, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add dreamhunter2333/cloudflare_temp_email#12
The classic email sending library for PHP
22K starsJun 6, 2026 pushproductivity-automationPHPEmail
$ npx skills add PHPMailer/PHPMailer#13
: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#14
BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — 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#15
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#16
Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)
14K starsJun 16, 2026 pushproductivity-automationKotlinEmail
$ npx skills add thunderbird/thunderbird-androidHow 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 OneSignal Website SDK 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.