ImprovMX provides advanced[1] email forwarding to your existing inbox, with sending handled by SMTP.
Resend is a developer-native email sending service for transactional and broadcast emails, with forwarding handled by inbound webhooks.
Choose Resend if you need a fully featured API-based email sending service, and are comfortable handling email entirely with code. Choose ImprovMX if you need a traditional email inbox experience.
ImprovMX
Resend
Inbound Email
Native email forwarding and inbound webhooks.
Incoming emails delivered via inbound webhooks only.
Pricing
Lower-cost monthly and annual fixed or scalable plans
Volume or fixed based pricing, more expensive monthly plans.
Free plan
Higher forwarding daily cap (500) but no free sending.
Lower daily cap (100), but includes API sending.
Sending Volume
Monthly SMTP quotas per plan, talk to us to scale.
Fixed, but can self-enable overages for higher volume.
API
API manages domain, aliases and forwarding.
CLI/MCP
Offers a CLI and an MCP server.
Email API
Offers a full REST sending API.
Advanced Forwarding
Rules routing, Regexes and Webhooks.
Webhook only.
Webhooks
Inbound email webhooks.
Email Tracking
No open or click tracking.[3]
Full email engagement tracking.[3]
Email Templates
Not offered.[3]
Pre-built templates for transactional emails.[3]
Dedicated IPs
Shared IP pool only.[3]
Managed dedicated IP pools.
Compliance
ImprovMX is GDPR compliant.
Resend is GPDR and SOC II compliant.
1. ImprovMX offers SMTP sending, rules routing, wildcard addresses, multiple recipient destinations, regex aliases and webhooks.
2. Resend's API lets you send email via HTTP or SMTP (single/batch). It supports domain and key management, webhooks for delivery/events, audience tooling (contacts, segments, topics), and inbound email receipt with APIs to fetch full content and attachments.
3. Resend offers webhooks for email events (sent, scheduled, delivered, delivery delayed, opened, clicked, bounced, spam complaints, failed, suppressed, and received).
4. ImprovMX's CLI is built for terminal workflows, automation, and ai coding tools like Claude Code and OpenAI Codex.
Questions? Reach out to us, we love chatting about email service providers.
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