Private Email Threads for Marketplaces
without Exposing Real Email Addresses

Secure peer-to-peer communication without exposing user emails. RelayCore generates per-thread aliases so users communicate through their existing email clients.

No new inbox. No leaked identities. Full control at the platform level.

Join Private Beta

How It Works

From API Call to Secure Conversation

  1. Instant Thread Provisioning

Create a secure relay thread via API with approved participants, and initial message. Relay generates a unique, thread-bound email alias. Participants receive an email from a unique alias instantly.

Create a secure relay thread via API with approved participants, and initial message. Relay generates a unique, thread-bound email alias. Participants receive an email from a unique alias instantly.

  1. Seamless Peer Communication

Participants reply using their existing email clients. Relay validates participants and routes messages securely between verified thread members only.

Participants reply using their existing email clients. Relay validates participants and routes messages securely between verified thread members only.

  1. Visibility via Webhook Events

Track replies, engagement, and deal milestones in real time through structured webhook events.

Track replies, engagement, and deal milestones in real time through structured webhook events.

Track replies and engagement in real time through structured webhook events.

Benefits

Key Benefits

API-First Integration

Create threads, manage participants, control lifecycle programmatically.
Works with your existing backend in minutes.

Privacy by Default

Privacy by Default

Privacy by Default

Relay replaces real emails with secure, per-thread aliases. Buyers and sellers never see each other’s personal contact details.

Clean Reply Threading

Clean Reply Threading

Clean Reply Threading

Proper In-Reply-To and References headers handled correctly. Clean threads in mail inbox.

Access Control

Access Control

Access Control

Messages are accepted only from approved thread participants. No random inbound spam. No impersonation risk.

Native Email Experience

Native Email Experience

Native Email Experience

Users reply directly from Gmail, Outlook, etc. No new inbox. No friction.

Controlled Communication

Controlled Communication

Controlled Communication

Your marketplace controls who talks to whom and when. Instantly revoke access by disabling a thread.

Pricing

Flexible Pricing

Currently in Private Beta. We are onboarding 3–5 early integration partners.

Contact Us

Join Private Beta

Tell us about your platform. We’ll reach out within 24 hours.

FAQ

Your Questions, Answered

Answers to your most common questions about our AI services

Answers to your most common questions about our AI services

How does RelayCore protect user email addresses?

Who can send messages to a thread alias?

Can someone guess an alias and send spam?

Can I add observers or moderators to a thread?

How do I integrate RelayCore into my platform?

Can threads be expired or disabled?

Is RelayCore suitable for high-volume marketplaces?

Do users need to create accounts with RelayCore?