EmailJS is popular for one honest reason: it's the fastest way to fire an email from front-end JavaScript with no backend. Drop in the SDK, connect it to your email service, wire a template, and a contact form on a static site just works. If that's all you need, it's a fine tool.
01
The email goes out, but nothing is stored, searchable, or spam-filtered. If a message bounces or lands in spam, it's simply gone; there's no inbox to fall back on.
02
You're still hand-rolling validation, spam protection, file uploads, and statuses yourself. EmailJS moves the send, not the form.
03
It relays through your connected mailbox rather than a traceable sending pipeline you can debug when something doesn't arrive.
04
There's no machine-first path: no MCP tools, no one-HTTP-call setup for an agent building your app.
| EmailJS | mailnix | |
|---|---|---|
| Send email with no backend | Yes | Yes |
| Browser-safe keys | Service-relay model | Scoped, revocable publishable keys (mnxpub_) |
| Forms backend (designer, validation) | No | Designer + hosted page + embed snippet |
| Spam-filtered submissions inbox | No | Every submission stored, scored, searchable |
| Bring your own SMTP provider | Your mailbox | SES, Postmark, Resend, SendGrid, Mailgun, any SMTP |
| Delivery tracing | No | Public-shareable trace per send |
| Built for AI agents (MCP) | No | One call returns a bearer token, no signup |
| EU-hosted / GDPR | Varies | EU data centres, GDPR-ready |
| Free tier | Yes | Yes, then pay-as-you-go |
EmailJS details are summarised from public information and may change; check their current docs before deciding.
A contact form on mailnix posts to a real endpoint, gets spam-scored, and lands in a submissions inbox you can read and reply to, instead of vanishing into a relay.
Publishable keys are gated server-side by origin lock, recipient allow-list, locked From, and rate caps: safe to ship in front-end code, revocable in one click.
Bring any SMTP provider and get an end-to-end trace for every message, so a missing email is a debuggable event, not a mystery.
Vibe-coding in Cursor or Lovable, or wiring up an agent? mailnix exposes MCP tools and a one-call setup so an agent can add email and forms on its own.
Honestly: stick with EmailJS if you only need to fire a single templated email from a static contact form to your own inbox, and you don't care about storing submissions, spam filtering, an inbox, delivery tracing, or AI/agent access. It's lighter for that one job. Switch to mailnix once you've outgrown fire-and-forget and want the collect + inbox + deliverability + AI side, while keeping the no-backend simplicity.
For the 'send email from the frontend' use case, yes: you swap the SDK and use a publishable key. mailnix then adds forms, a submissions inbox, and tracing on top.
Yes. mailnix issues browser-safe publishable keys, so front-end-only apps and static sites can send email and collect form submissions with no server.
Yes, mailnix is hosted in EU data centres and is GDPR-ready.
Yes. mailnix ships MCP tools and a one-call setup so agents can wire up email and forms programmatically.
One HTTP call to get started