A single downloadable HTML file that tracks a cryptocurrency portfolio's profit and loss entirely inside your browser, with no account, server, or cloud sync involved.
airtight.sell.app
Alternatives to
DNSniffer
Best alternatives to DNSniffer in 2026
Every time a website gets an SSL certificate or a domain name gets registered, that fact becomes public record somewhere on the internet — buried across certificate logs and registry files nobody has time to read. DNSniffer is like a search engine for that hidden paper trail: type in a company name, a keyword, or a wildcard pattern, and it tells you every matching domain it has found, when it first appeared, and what certificate authority issued its SSL certificate. It's aimed at people who need to know what's out there on the web, whether that's a security researcher hunting for phishing lookalikes of their company's domain, or a developer curious which domains are using a particular certificate issuer. Under the hood, DNSniffer continuously ingests Certificate Transparency logs (the public audit trail every CA must publish) and ICANN's Centralized Zone Data Service feeds, building a searchable index that currently covers over 364 million domains across hundreds of TLDs. Results can be queried through a web UI, a free read-only JSON API with cursor-based pagination, a live WebSocket feed of newly-indexed domains, or daily bulk CSV exports per TLD or certificate authority. It also ships an MCP server so AI agents (like Claude) can query domain data directly, and a brand-monitoring feature that emails daily alerts when new lookalike domains targeting a given brand are detected.
Quick comparison of DNSniffer alternatives
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Privacy-conscious cryptocurrency holders who want portfolio P&L tracking without linking exchange accounts or API keys to a cloud service | — | |
| 2 | Android users and developers seeking secure, decentralized two-factor authentication token management without cloud lock-in. | — | |
| 3 | Développeurs d'agents IA et organisations devant démontrer la gouvernance/conformité de leurs agents | — | |
| 4 | Développeurs indépendants et plateformes gérant du contenu généré par les utilisateurs | — | |
| 5 | Équipes de développement cherchant une correction automatique et fiable des failles de sécurité dans leurs PR | — | |
| 6 | Administrateurs systèmes Windows gérant l'accès SSH et souhaitant un audit des sessions | — | |
| 7 | Professionnels soucieux de confidentialité, conseillers financiers, fiscalistes, et toute personne devant caviarder des documents sensibles localement, sans les envoyer sur des services externes. | — | |
| 8 | Équipes d'ingénierie, auditeurs et entreprises se préparant à un audit de sécurité client | — | |
| 9 | Entreprises et organisations régulées européennes traitant des données clients sensibles, développeurs voulant garder les données personnelles hors du contexte des assistants IA | — | |
| 10 | Équipes sécurité et entreprises déployant des agents IA, serveurs MCP ou frameworks IA en production | — | |
| 11 | PME et organisations de secteurs réglementés (immobilier, santé, assurance, IT), freelances | — | |
| 12 | Équipes produit IA, startups construisant des systèmes IA à risque, entreprises en due diligence | — |
#1
- ✓ No account or cloud server — works fully offline
- ✓ One-time $30 payment instead of a subscription
#2
Free, open-source Android app for storing your two-factor authentication codes in an encrypted vault, with no cloud account, no ads, and full control over your own backups.
getaegis.app
- ✓ Free, open source, no ads
- ✓ Encrypted vault, biometric/PIN unlock
#3
An open specification and Python library for generating hardware-attested, tamper-evident records of what an AI agent actually did — for audits and compliance.
trace.agentrust-io.com
- ✓ Hardware-rooted proof (secure execution environment attestation), not just a software log
- ✓ Anchors to an independent transparency ledger (SCITT) for third-party verification
#4
An API that detects nudity and explicit content in images and videos in under 200ms, with tiered usage-based pricing.
tabushield.com
- ✓ Sub-200ms latency, clear published tiered pricing
- ✓ Auto-generated DSA compliance reports
#5
A tool that automatically opens pull requests with deterministic, proof-verified security patches instead of just flagging issues.
railo.dev
- ✓ Deterministic, proof-backed patches (AST + Z3) instead of LLM guesses
- ✓ Integrates directly into the pull-request workflow
#6
A free, passive tool that reconstructs SSH session activity — including commands — from Windows OpenSSH event logs.
github.com
- ✓ Reconstructs full session activity from Windows event logs, including commands
- ✓ Passive and read-only — never intercepts credentials
#7
A macOS application for permanent, local PDF redaction with automatic PII detection and batch processing, no cloud uploads.
github.com
- ✓ Permanently rasterizes redacted text instead of just visually covering it, so nothing hidden can be extracted.
- ✓ Fully local processing on macOS — no cloud uploads, no third-party servers involved.
#8
A free tool that scans your website from the outside — the way a hacker would — and hands you a letter grade plus plain-language fixes, instead of a dense technical report only a security specialist could read.
freedast.com
- ✓ Completely free with no scan limits
- ✓ Results in ~60 seconds with a clear A-F grade and plain-language guidance
#9
A gateway that sits between your app and AI models like GPT or Claude, strips out names, emails and other personal details before the data leaves Europe, and charges you only what the model provider charges — no markup.
noirdoc.de
- ✓ Masquage automatique et réversible des données personnelles avant envoi au modèle IA
- ✓ Aucune marge de plateforme, tarif fournisseur direct
#10
A free, open-source security scanner from Tencent that checks your AI infrastructure — agents, MCP servers, and frameworks — for known vulnerabilities and jailbreak weaknesses before an attacker does.
github.com
- ✓ Couvre infrastructure, agents, MCP et LLM en un outil
- ✓ Détecte 2000+ vulnérabilités connues
#11
An agreement management platform combining e-signature, identity verification (KYC) and payment collection, with a blockchain-anchored audit trail.
chaindoc.io
- ✓ Signature, KYC et paiement dans un seul flux
- ✓ Conformité eIDAS, ESIGN Act, UETA
#12
An AI-powered scanner that checks your product against 125+ regulatory frameworks (EU AI Act, GDPR, SOC2, CCPA, HIPAA...) and lists the gaps to fix.
aicomplianceadvisor.eu
- ✓ Couvre 125+ frameworks réglementaires
- ✓ Tarification fixe avec délai garanti
FAQ about DNSniffer alternatives
- What is the best alternative to DNSniffer in 2026?
- Based on our selection, Airtight is the best alternative to DNSniffer in 2026. A single downloadable HTML file that tracks a cryptocurrency portfolio's profit and loss entirely inside your browser, with no account, server, or cloud sync involved.. See our full ranking above to compare all options.
- Is DNSniffer free?
- DNSniffer is a paid tool. Several alternatives in our selection offer free or freemium versions.
- How many alternatives to DNSniffer are there?
- mySelectas has listed 12 alternatives to DNSniffer in the Security & Privacy category. Our selection is updated regularly to include the best options available.