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EmailJS

4.8

Free

Highly praised for ease of integration and documentation quality, though some users find the free tier limits restrictive for high-growth apps.

Send emails directly from client-side code without a backend server.

DevelopmentFree pricingAPI availableUpdated 2026-03-17

Best fits

Client-side email dispatchDynamic HTML templating

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EmailJS interface

About EmailJS

EmailJS is a specialized serverless messaging abstraction layer that enables developers to send emails directly from the frontend (JavaScript, React, Vue, Angular, or Mobile SDKs) without implementing a custom backend or managing SMTP servers. In the 2026 landscape of modular, decoupled architectures, EmailJS serves as a critical bridge between modern UI frameworks and established transactional email providers like SendGrid, Mailgun, and AWS SES. The platform's technical core revolves around its 'Service-Template-SDK' model: developers connect an email provider (Service), design dynamic HTML layouts with variable placeholders (Templates), and trigger dispatches via a secure client-side library (SDK). This architecture significantly reduces infrastructure overhead for single-page applications (SPAs) and static sites. Security is handled through origin whitelisting, reCAPTCHA integration, and template locking, ensuring that client-side triggers cannot be easily hijacked for spam. As development shifts further toward serverless and edge computing, EmailJS maintains its market dominance by offering a low-latency, highly scalable solution for transactional notifications, lead capture, and automated reporting without the friction of server-side management.

Core Capabilities

EmailJS is a specialized serverless messaging abstraction layer that enables developers to send emails directly from the frontend (JavaScript, React, Vue, Angular, or Mobile SDKs) without implementing a custom backend or managing SMTP servers.

Main Tasks

Use Cases

Serverless Contact Forms

Static sites (Gatsby, Next.js) need to receive user inquiries without building a custom API endpoint.

VIEW EXECUTION STEPS

1.

User fills out a 'Contact Us' form on a static site.

2.

JavaScript event listener captures the submit action.

3.

emailjs.sendForm() is called with the Service and Template ID.

4.

EmailJS validates the request against domain whitelists and sends the email.

Automated Error Reporting

Developers need immediate notification of frontend runtime errors without complex logging infrastructure.

VIEW EXECUTION STEPS

1.

Global catch block in JS captures a critical error.

2.

Error stack trace is formatted into a JSON object.

3.

EmailJS triggers an alert email to the dev team with the stack trace.

4.

Dev team receives a structured HTML email with the user's browser context.

User Feedback & Surveys

Gathering user sentiment immediately after an interaction without persistent database storage.

VIEW EXECUTION STEPS

1.

User completes a purchase or action.

2.

A feedback modal appears.

3.

Submission triggers an EmailJS template that routes the data to a project management email or CRM.

4.

An auto-responder is sent to the user thanking them for the feedback.

Job Application Submissions

Allowing candidates to upload resumes and apply to jobs on a static 'Careers' page.

VIEW EXECUTION STEPS

1.

Candidate fills out details and attaches a PDF resume.

2.

Frontend converts the PDF to Base64.

3.

EmailJS sends the application data and the Base64 file as an attachment to the HR department.

4.

HR receives a clean HTML email with the resume attached.

Lead Magnet Delivery

Instantly sending an eBook or whitepaper to a user after they provide their email address.

VIEW EXECUTION STEPS

1.

User enters email in a 'Download Guide' field.

2.

EmailJS triggers a template containing the download link or the file as an attachment.

3.

The system uses the user's email as the 'To' address dynamically.

4.

Deliverability logs verify the user received the guide.

E-commerce Receipt Dispatch

Sending order confirmations for platforms using client-side checkouts (like Stripe Checkout).

VIEW EXECUTION STEPS

1.

Stripe success callback triggers in the frontend.

2.

Order details are formatted into a template params object.

3.

EmailJS dispatches a professional HTML receipt to the customer.

4.

BCC copy is sent to the warehouse for fulfillment.

Waitlist Signups

Capturing interest for a new product launch on a landing page with zero backend setup.

VIEW EXECUTION STEPS

1.

User submits their email on a landing page.

2.

EmailJS routes the email to a central collection inbox.

3.

Automated confirmation email sent to the user to verify signup.

4.

Developer exports logs later to build a marketing list.