Alternative to Mailjet

Mailjet is a European email API with a visual template builder. relay focuses on developer email: sending, receiving, and reputation monitoring in one EU-hosted service.

Best for a EU email API with a visual template builder: Mailjet

Best for developer email with monitoring and automated DNS: relay

Quick comparison

Feature	relay	Mailjet
SPF	Auto-served	Manual record
DKIM	RSA-1024, RSA-2048, Ed25519	RSA only
DMARC	Auto-served	Manual record
MTA-STS	Auto-served	Self-hosted
TLS-RPT	Auto-served	Manual record
Return-Path	Auto-served	Manual CNAME
Reputation monitoring	DMARC + TLS-RPT parsed	Not available
Incoming mail	MX + webhooks	Inbound parse
EU data sovereignty	EU (Germany), GDPR	EU (Sinch, Sweden)
Free test domain	Yes	No
Pricing	Flat per message	Tiered, contact-based

What Mailjet does well

Mailjet (owned by Sinch, like Mailgun) is a Paris-based email service popular across Europe. As of 2025, it offers a templating API and marketing tools, with sub-account collaboration for teams.

The trade-off is the infrastructure side. DNS setup is paste-it-yourself. Inbound is limited to a webhook. Mailjet does not ingest DMARC or TLS-RPT reports.

Where relay is different

All-in-one monitoring

Mailjet does not ingest DMARC or TLS-RPT reports. relay parses RUA, RUF, and TLS-RPT reports and shows reputation and failure trends in a dashboard. You monitor abuse and deliverability without extra tooling.

Sending without DNS busywork

Mailjet gives you SPF and DKIM records to add to your DNS provider. You rotate keys yourself. relay automates this. You delegate NS and set one DMARC record. relay then serves MX, SPF, DKIM, Return-Path, PTR, and TLS-RPT for you. relay signs mail with DKIM keys in RSA-1024, RSA-2048, and Ed25519, and it serves the MTA-STS policy over HTTPS. The built-in nameserver is the mechanism. You do not touch a DNS dashboard after the initial delegation.

Incoming mail

Mailjet inbound parse routes mail to a webhook you provide. DKIM and SPF for inbound are managed by Mailjet. relay runs an MX server that you control. It stores raw bodies in your S3 and dispatches Standard Webhooks with Ed25519 signatures. You verify each delivery with a public key you hold.

EU data sovereignty

Mailjet is owned by Sinch, a Swedish (EU) company, and is EU-hosted. Here, relay and Mailjet are on equal footing. Both are EU-based and GDPR-aligned. relay adds a Germany-hosted stack with local support and no US data path.

Free test domain

relay ships a free sender domain to test deliverability before you delegate a real domain. Mailjet requires a verified sender domain.

When Mailjet makes sense

You want a visual template builder for marketing campaigns.
You need a EU-hosted provider with sub-account collaboration.
You use the Sinch ecosystem for SMS and email.

The bottom line

Mailjet is a solid European email API with marketing tools. relay is the better fit for developer email when you want inbound mail, reputation monitoring, and automated DNS in one EU-hosted service.

Migrating from Mailjet to relay

Add your domain in relay. Delegate NS to the relay nameservers.
Set the DMARC record that relay gives you.
Move your SMTP or API calls to relay with a per-org credential.
Replace Mailjet inbound parse with relay webhook subscriptions.