Dev tools · alternatives · 2026
24 alternatives to Mailuminati Guardian
Collaborative & scalable spam/phishing detection
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
Verify and validate emails at scale
2024 · generect.com · its alternatives →
- 2
DMARC Digests▲101Protect your brand from email scammers.
2020 · dmarcdigests.com · its alternatives →
- 3
Detect and remove spam words in your emails
2022 · mailmeteor.com · its alternatives →
- 4
Folderly Lens ▲107Domain health analysis for high performance email campaigns
Jul 2026 · lens.folderly.com · its alternatives →
- 5
Perceptual hashing tools for detecting child sexual abuse material - thorn-oss/perception
2019 · github.com · its alternatives →
- 6
PowerDMARC▲57Stop hackers from sending emails from your domain with DMARC
2021 · powerdmarc.com · its alternatives →
- 7
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 · its alternatives →
- 8
- 9
We fight email scam for u! Privacy-first scam detection.
Jul 2026 · phishlight.ai · its alternatives →
- 10
- 11
Find quality emails from a domain and verify their validity
2022 · minelead.io · its alternatives →
- 12
Detect and block disposable, temporary, fake email addresses. Fight spam, fraud and free trial abuse. Available as WordPress plugin and via JSON API.
2017 · istempmail.com · its alternatives →
- 13
Three layers of phishing defense: anonymous email aliases, impersonation detection, and passkey authentication. Post-quantum secure identity platform from Locke.
2021 · locke.id · its alternatives →
- 14CZ
2017 · checkphish.ai · its alternatives →
- 15
- 16
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…
May 2026 · github.com · its alternatives →
- 17FH
2020 · madhash.telekinesis.cloud · its alternatives →
- 18
The phishing response platform that closes the loop.
Jul 2026 · phishradar.fr · its alternatives →
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- 20
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 · its alternatives →
- 21
Mentally computable verification codes for email aliases implemented as a postfix tcp table; uses asyncio. - m3047/trualias
2019 · github.com · its alternatives →
- 22
Tackle Spam with Precision: Detect, Classify and Manage
2024 · its alternatives →
- 23EE
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 · its alternatives →
- 24
Instantly check an email
2015 · spamcheck.postmarkapp.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →