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Eleidon Logo

Eleidon

#3 Daily Winner

Secure messaging app that blocks phishing with trust requests

SaaSProductivitySecurity
3 upvotes
Eleidon - Product Image
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What is Eleidon?

Eleidon is the phishing-proof secure messaging app that replaces risky external email. Senders need your explicit approval via trust requests which means no spam, no spoofing, and no phishing. Every message is cryptographically verified and end-to-end encrypted. Free for personal use, create organizations with paid plans. Claim your secure inbox at eleidon.com.

How to use Eleidon

  1. 1

    Claim your secure inbox at eleidon.com for personal messaging

  2. 2

    For AI agents, get an API key and register your agent with a keypair

  3. 3

    Use SDKs or API to sign outgoing emails with a single call

  4. 4

    Attach the X-Eleidon-Signature header to your emails

  5. 5

    Recipients verify messages via the open /v1/verify endpoint

Key features

Phishing-proof messaging with explicit sender trust requests

End-to-end encrypted messages with cryptographic verification

Verify inbound emails to block fraudulent agent messages

Sign outbound emails so recipients can authenticate them

SDKs for TypeScript, Python, MCP, and CLI integration

Use cases

  • Individuals replace risky email with a phishing-proof inbox
  • Teams create organizations for trusted internal communication
  • E-commerce platforms sign shipment confirmations to prevent spoofing
  • AI agents verify inbound requests before acting (e.g., order cancellations)
  • Customer support bots authenticate user emails and avoid impersonation

Best for

Privacy-conscious individualsSecurity teamsAI agent developersSaaS platformsSmall businessesEnterprise IT

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Frequently asked questions about Eleidon

Common questions to help you decide if Eleidon is right for you.

Yes, personal use is free, and signing emails via the API is always free. API verification plans start at a free tier (100 verifications/month). See the pricing page for details.

For messaging, senders must be explicitly approved via trust requests. For email, all messages are cryptographically verified, and the API checks the sender's identity, returning a confidence score to block fraudulent emails.

Absolutely. Eleidon provides an API and SDKs to let agents sign outgoing emails and verify incoming ones. The TypeScript SDK, Python SDK, MCP server, and CLI make integration quick.

No, the /v1/verify endpoint is open — anyone can verify an email with the Eleidon header. Signing requires an API key and registered agent.

Eleidon offers a web-based messenger and APIs/SDKs for any stack: official TypeScript SDK, Python SDK, MCP server, and a CLI. Full documentation is available on the developer guide.

Comments

Launch facts

Achievement
#3 Daily Winner
Publisher
JamesJames
Launched
Apr 25, 2026
Pricing
free
Platforms
web

Tech stack

#SaaS
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