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Alternatives

Products that do what Mailuminati Guardian does

Collaborative & scalable spam/phishing detection

  1. 1

    Verify and validate emails at scale

    2024

  2. 2

    Protect your brand from email scammers.

    2020

  3. 3

    Domain health analysis for high performance email campaigns

    Jul 2026 · lens.folderly.com

  4. 4VT

    I've spent the last few months working on something I wish I'd had years ago. I kept running into the same issue: CI green, production mail broken. TLS handshake failures, DKIM alignment mismatches, SPF soft-fails ... the stuff that only surfaces when real mail servers are involved. Most test tools (Mailpit, MailHog) are catch-alls. They confirm "an email was sent" but don't validate the protocol. They also aren't designed for network-exposed environments: no auth, unprotected Web UI, easy to enumerate messages. VaultSandbox is my attempt at fixing that. It's a self-hosted SMTP gateway…

    Jan 2026 · vaultsandbox.com

  5. 5

    Send and receive emails anonymously

    2024

  6. 6

    We fight email scam for u! Privacy-first scam detection.

    Jul 2026 · phishlight.ai

  7. 7

    Find quality emails from a domain and verify their validity

    2022

  8. 8

    Axios / LiteLLM hacks behavioral detector app for Mac/PC

    Apr 2026 · edamame.tech

  9. 9

    The phishing response platform that closes the loop.

    Jul 2026 · phishradar.fr

  10. 10PS

    What PII-Shield does: It's a K8s sidecar (or CLI tool) that pipes application logs, detects secrets using Shannon entropy (catching unknown keys like "sk-live-..." without predefined patterns), and redacts them deterministically using HMAC. Why deterministic? So that "pass123" always hashes to the same "[HIDDEN:a1b2c]", allowing QA/Devs to correlate errors without seeing the raw data. Key features: 1. JSON Integrity: It parses JSON, sanitizes values, and rebuilds it. It guarantees valid JSON output for your SIEM (ELK/Datadog). 2. Entropy Detection: Uses context-aware entropy…

    Feb 2026 · github.com

  11. 11MS

    Hi HN :) really excited to share this with you. The one thing AI reliably does is generate noise. Half the tools I see launch are just machines for producing more noise across more channels. And people are starting to see this in the form of emails in their inboxes as spam filters are struggling. There used to be a useful signal in email: the effort a sender put into customizing a message was a rough proxy for how relevant it actually was. AI killed that. Now it's customized slop with the appearance of effort with none of the cost. It is painful that the open internet / open channels…

    Jul 2026 · captchainbox.com

  12. 12IB

    BoringSSL and nghttp2. Matches JA3N, JA4, and JA4_R fingerprints. Supports HTTP/2, async/await, and works with Cloudflare-protected sites. Not trying to compete with curl_cffi - just a learning project that turned into something functional.

    Nov 2025 · github.com

  13. 13KD

    I built this after seeing multiple teams accidentally ship API keys in their frontend code. The problem: Modern web development moves fast. You're vibe-coding, shipping features, and suddenly your AWS keys are sitting in a tag visible to anyone who opens DevTools. I've personally witnessed this happen to at least 3-4 production apps in the past year alone. KeyLeak Detector runs through your site (headless browser + network interception) and checks for 50+ types of leaked secrets: AWS/Google keys, Stripe tokens, database connection strings, LLM API keys (OpenAI, Claude, etc.), JWT…

    Nov 2025 · github.com

  14. 14

    Find public emails across domains, even the sneaky ones

    2024

  15. 15
    Secria22

    Post-quantum secure email, private by design

    2025

  16. 16EE

    Hi HN, we have recently completed a research project on how to encrypt emails with post-quantum secure algorithms as well as Forward Secrecy. We'd love to hear your feedback and discuss technical issues. The paper can be found here: https://eprint.iacr.org/2021/875

    2021

  17. 17PC

    Phishcan provides crucial threat intelligence, and it currently tracks phishing domains for: • Scotiabank, Desjardins, RBC, Interac… • Telecom providers, provincial power and health services... • Federal & provincial services, CRA, Canada Post, Service Canada, Revenue Québec... How Phishcan works: • Parsing millions of domains: Continuously scanning and analyzing vast numbers of domains to detect suspicious patterns and potential phishing sites. • Monitoring threat actors : close watch on cyber‑criminal infrastructures and their new domain registrations. • Data enrichment : adding contextual…

    Sep 2025 · phishcan.com

  18. 18MA
  19. 19TP

    Hi HN, we are the developers from Tuta (formerly Tutanota), the German end-to-end encrypted email provider, and we recently released the world's first post-quantum encryption for email. We have included a full technical write-up of the cryptography involved in these changes and we have released it for open public review. This document specifies TutaCrypt, a protocol designed for hybrid email encryption in Tuta Mail. The protocol combines a classical Elliptic-Curve-Diffie-Hellman key exchange with a post-quantum KEM. The goal is to replace the usage of RSA in Tuta Mail. In the remainder of…

    2024 · tuta.com

  20. 20PE
  21. 21
    eDMARC12

    Simplify investigation of every email failure

    Mar 2026 · ivorysec.com

  22. 22

    Monitor and secure your email domains, campaigns, and client

    Jul 2026 · infraova.com

  23. 23FB

    I've published an open specification for a detection method I'm calling RQ4 (Request Context Fingerprinting). It analyzes whether HTTP request headers are logically consistent with real browser behavior - not just what headers are present, but whether they make sense together given the request context.

    Mar 2026 · github.com

  24. 24

    Free phishing detector - scan links in seconds

    Feb 2026 · unphishable.vercel.app

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