What is EmailJS?
EmailJS is a client-side email sending service that allows frontend JavaScript applications to send emails directly from the browser without a backend server. It works by connecting to email service providers (Gmail, Outlook, SendGrid, etc.) and sending templated emails via an API key embedded in the frontend code. It is popular for contact forms and notification emails in static sites.
EmailJS is offered by EmailJS and is a popular choice for teams that need to process inbound email at scale. It integrates into existing workflows through routing rules, filters, and forwarding options that make it flexible for many use cases.
However, as teams grow and requirements evolve, many developers find that EmailJS introduces complexity, cost, or integration overhead that does not match what they actually need. JsonHook was designed to address these gaps by delivering every inbound email as a clean, structured JSON webhook with zero configuration required.
Pricing: Free plan: 200 emails/mo; Personal $15/mo (1,500 emails); Professional $25/mo (5,000 emails)
- Inbound email focus: JsonHook is purpose-built for receiving and processing email, not sending it
- Server-side security: No API keys in frontend code — JsonHook operates entirely server-side with signed webhook deliveries
- Full email payload access: Every field of every received email is available in the JSON payload
- Webhook push delivery with retries and logs
- Works alongside EmailJS: Use EmailJS to send and JsonHook to receive — they are complementary tools
Limitations of EmailJS
Before committing to EmailJS for your inbound email pipeline, it is important to understand where it falls short. Development teams frequently encounter the following pain points:
- Outbound-only: EmailJS is for sending email from the browser — it has no capability to receive, parse, or process inbound email
- Client-side API key exposure: API keys are embedded in frontend JavaScript, which is inherently less secure than server-side implementations
- Not suitable for application-level email processing: EmailJS is designed for simple contact forms, not for building email-driven application workflows
- No webhook delivery: There is no inbound email processing capability whatsoever
- Template-based sending only: Email content is limited to predefined templates — dynamic, data-rich emails require workarounds
These limitations become particularly painful at scale or when building applications that require low-latency, reliable delivery of email data as structured JSON. JsonHook solves each of these issues out of the box.
EmailJS vs JsonHook
The following table provides a direct, feature-by-feature comparison between EmailJS and JsonHook. Both tools handle inbound email processing, but they differ significantly in approach, pricing, and developer experience.
| Feature | EmailJS | JsonHook |
|---|---|---|
| Receives inbound email | ✗ Not a feature | ✓ Core feature |
| Sends email from browser | ✓ Core feature | Not applicable |
| Server-side security | API key in browser JS | ✓ Server-side only |
| Webhook delivery | ✗ Not available | ✓ Push delivery |
| HMAC-SHA256 signatures | N/A | ✓ Included |
| Free tier | 200 sends/mo | 100 receives/mo |
| Pricing (5K emails/mo) | $25/mo (Professional) | $12/mo (5K receives) |
| Attachment parsing | N/A | ✓ Included |
| Automatic retries | N/A | ✓ With backoff |
| Use case fit | Contact forms, outbound | Inbound email processing |
JsonHook is purpose-built for developers who want inbound email delivered as a JSON webhook endpoint call — nothing more, nothing less. There is no dashboard complexity to navigate for basic delivery, no per-message parsing fees, and no lock-in to a specific email provider SDK.
How to Migrate from EmailJS to JsonHook
Migrating from EmailJS to JsonHook is straightforward. Most teams complete the switch in under 30 minutes. Follow the steps below to move your inbound email pipeline without downtime:
- Note: EmailJS and JsonHook serve opposite purposes — EmailJS sends email from the browser; JsonHook receives email on a server
- If you need to receive replies to emails you send via EmailJS, create a JsonHook inbound address and use it as the Reply-To address in your EmailJS templates
- Set up a webhook handler in your backend to receive and process those inbound replies via JsonHook
- Configure HMAC-SHA256 signature verification for security
Because JsonHook delivers a consistent JSON payload for every inbound email — including parsed headers, text body, HTML body, and attachment metadata — you typically need fewer lines of application code after the migration than before.
Pricing Comparison
EmailJS pricing: Free plan: 200 emails/mo; Personal $15/mo (1,500 emails); Professional $25/mo (5,000 emails). Costs can escalate quickly as email volume grows, and many plans gate key features like webhook retries or attachment handling behind higher tiers.
JsonHook offers transparent, volume-based pricing with a generous free tier that is suitable for side projects, staging environments, and low-volume production use:
| Plan | Price | Emails / Month | Features |
|---|---|---|---|
| Free | $0 | 100 | All core features, 1 address, HMAC signatures |
| Starter | $12/mo | 5,000 | 5 addresses, retries, attachment parsing |
| Pro | $39/mo | 50,000 | Unlimited addresses, priority delivery, logs |
Compared to EmailJS, JsonHook's Starter plan ($12/mo) covers the majority of small-to-medium use cases at a fraction of the cost, with no per-email parsing fees and no credit card required for the free tier.