Software Alternatives, Accelerators & Startups

Abnormal Security VS PrivacyNotes

Compare Abnormal Security VS PrivacyNotes and see what are their differences

Abnormal Security logo Abnormal Security

Abnormal is a prominent platform that provides accurate and superior cloud-native Email Security.

PrivacyNotes logo PrivacyNotes

Zero-knowledge encrypted notes, tasks, journals, files, and passwords in one app. Your keys never leave your device. One-time price, no subscription. Hosted in Switzerland.
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  • Abnormal Security Landing page
    Landing page //
    2023-09-25
  • PrivacyNotes Journal
    Journal //
    2026-06-25
  • PrivacyNotes Settings
    Settings //
    2026-06-25
  • PrivacyNotes Website
    Website //
    2026-06-25

PrivacyNotes is a zero-knowledge encrypted workspace that brings your notes, tasks, journals, files, and passwords into one app, so you stop juggling four separate subscriptions.

Everything is encrypted on your device with XChaCha20-Poly1305 before it ever syncs. Your keys are derived from a recovery phrase that never touches our servers, so we cannot read your content, your filenames, or anything else. This is real zero-knowledge, not a marketing label.

Five pillars, one encrypted app:

  • Notes - a live markdown editor with note-to-note links, tags, and fast full-text search
  • Tasks - native checklists and task management next to your notes
  • Journals - daily entries with built-in mood, sleep, and medication tracking
  • Files - an encrypted vault for images, audio, and attachments
  • Vault - lock sensitive notes and logins behind a PIN or biometrics

Built for privacy, not surveillance:

  • No ads, no trackers, no analytics, ever
  • Sign in anonymously with a recovery phrase or with Google. No email or personal details required.
  • Open core: the encryption layer and database schema are published for independent review
  • Burn notes: self-destructing shares the server cannot read

Pricing that respects you:

  • Free covers every pillar with two-device sync and offline use
  • Pro is a one-time free, not a subscription, adding unlimited devices, note history, and more storage
  • Optional storage add-ons when you need them

Works on web, macOS, and soon iOS, Android, Windows and Linux with a responsive mobile layout. Import from Apple Notes, Standard Notes, Google Keep, Obsidian, and markdown in a few clicks.

Abnormal Security

Pricing URL
-
$ Details
-
Platforms
-
Release Date
2018 January
Startup details
Country
United States
State
California
Founder(s)
Evan Reiser
Employees
100 - 249

PrivacyNotes

$ Details
freemium $48 / One-off (Early adopter price)
Platforms
MacOS Web Firefox Google Chrome Edge Safari
Release Date
2026 June
Startup details
Country
Switzerland
Employees
1 - 9

Abnormal Security features and specs

  • Advanced Threat Detection
    Abnormal Security uses machine learning and AI models to accurately detect sophisticated email threats such as phishing, BEC (Business Email Compromise), and account takeover, which traditional solutions might miss.
  • Behavioral Analysis
    The platform analyzes communication patterns and behaviors to identify anomalies that could signify malicious activities, enhancing its ability to catch threats.
  • Automated Response
    Abnormal Security provides automated response features that help quickly neutralize identified threats, reducing the time and effort required from IT teams.
  • Integration Capabilities
    The solution integrates seamlessly with popular email platforms like Microsoft 365 and Google Workspace, making it easy to deploy across existing infrastructure.
  • User-friendly Dashboard
    Offers an intuitive and easy-to-navigate dashboard that provides clear visibility into threat landscape and security metrics.

Possible disadvantages of Abnormal Security

  • Cost
    Abnormal Security's advanced features come with a higher price tag compared to some other email security solutions, which could be a concern for smaller businesses with limited budgets.
  • Complexity of Features
    The wide range of features and capabilities may require a learning curve for administrators unfamiliar with AI-based security platforms.
  • Dependence on AI
    Reliance on AI and machine learning might lead to false positives or negatives, and adapting to new or evolving threats in real-time can be challenging.
  • Resource Intensive
    The implementation and management of the platform may demand significant IT resources, both in terms of human oversight and technical infrastructure.
  • Limited Offline Protection
    The platform is primarily focused on email security, and thus may not offer comprehensive protection for offline or non-email based attacks, necessitating additional solutions for holistic security.

PrivacyNotes features and specs

  • Privacy-focused
    PrivacyNotes is designed with privacy as a core principle, aiming to keep your notes secure and away from third-party access, which appeals to users concerned about data confidentiality.
  • Encryption
    The service typically emphasizes encryption to protect note content, meaning your data is scrambled and less vulnerable to unauthorized reading if intercepted or stored.
  • Ephemeral notes
    Many privacy note services offer self-destructing or temporary notes that automatically delete after being read or after a set time, reducing the digital footprint left behind.
  • Simple and lightweight
    Such tools often provide a clean, minimal interface focused on quick note creation and sharing without unnecessary features, making it easy to use.
  • No account required
    Privacy-oriented note apps frequently allow you to create and share notes without registration, lowering the barrier to entry and reducing personal data collection.

Analysis of PrivacyNotes

Overall verdict

  • I don't have verified, specific information about PrivacyNotes (privacynotes.app) to make a reliable assessment of its quality, security practices, or features. I cannot confirm details about its encryption methods, privacy policy, company background, or user reviews.

Why this product is good

  • Unable to verify claims about encryption or zero-knowledge architecture without independent confirmation
  • No access to current user reviews, ratings, or reputation data for this specific service
  • Cannot confirm company legitimacy, ownership, or track record
  • Unable to verify uptime, reliability, or actual security audit results
  • No information available on pricing structure or terms of service specifics

Recommended for

  • Before using, research independently via security audit reports if available
  • Check for third-party security reviews or penetration testing results
  • Verify the company's privacy policy and data handling practices directly on their site
  • Look for user reviews on independent platforms rather than relying on marketing claims
  • Consider established, well-audited alternatives if handling highly sensitive information

Category Popularity

0-100% (relative to Abnormal Security and PrivacyNotes)
Security & Privacy
100 100%
0% 0
Journal
0 0%
100% 100
Online Services
100 100%
0% 0
Note Taking
0 0%
100% 100

Questions & Answers

As answered by people managing Abnormal Security and PrivacyNotes.

Who are some of the biggest customers of your product?

PrivacyNotes's answer:

Honestly? We have no idea, and that is the entire point. Signup is anonymous (a recovery phrase or Google, no email or personal details), the app ships zero analytics and zero trackers, and zero-knowledge encryption means we cannot see who you are or what you store. We could not name a single customer if we tried. A privacy product that tracked its users closely enough to brag about them would be missing the plot.

What makes your product unique?

PrivacyNotes's answer:

PrivacyNotes is the only zero-knowledge encrypted workspace that keeps notes, tasks, journals, files, and a password vault behind one set of on-device keys. Most privacy apps do one of those well and rent it to you monthly. We do all five, encrypt everything with XChaCha20-Poly1305 before it leaves your device, and charge once instead of forever. The encryption core is open core, published so the claims can be verified rather than trusted.

Why should a person choose your product over its competitors?

PrivacyNotes's answer:

Three reasons:

  • One app, not four subscriptions. Standard Notes, Day One, and Lunatask each rent you a slice (notes, journaling, tasks). PrivacyNotes covers all of them plus files and a vault, for a fair one-time fee.
  • Real zero-knowledge. Your keys come from a recovery phrase that never touches our servers, so we cannot read your notes, your filenames, or your metadata. Some encrypted apps leave note or task metadata in the clear; we do not.
  • Verifiable, not just trusted. The crypto and schema are open core and published for review, and there is no ad, tracker, or analytics anywhere in the app.

How would you describe the primary audience of your product?

PrivacyNotes's answer:

Privacy-conscious individuals and independent professionals who handle information they would not want a vendor reading: lawyers, journalists, healthcare and mental-health practitioners, developers, security specialists, researchers, and founders. It also fits anyone who simply wants one private home for their notes, tasks, journaling, and wellness tracking instead of spreading them across surveillance-funded apps.

Which are the primary technologies used for building your product?

PrivacyNotes's answer:

React, TypeScript, Vite and Tailwind CSS.

What's the story behind your product?

PrivacyNotes's answer:

PrivacyNotes started from a simple frustration: staying organized meant scattering your life across half a dozen apps, most of which could read everything you typed and billed you monthly for the privilege. We wanted one place for notes, tasks, journals, files, and passwords, encrypted so thoroughly that the people running the servers could not read a word of it, and paid for once rather than forever. So we built the encryption first, made the keys live only on your device, and published the crypto as open core so the promise could be checked, not just believed. Everything else grew from one rule: your data is yours, and no one else's to mine.

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Abnormal Security and PrivacyNotes

Abnormal Security Reviews

We have no reviews of Abnormal Security yet.
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PrivacyNotes Reviews

  1. Everything I Needed in One App

    This app checks every box for me. Clean interface, no learning curve, local-first encryption, and secure sync across all of my devices.

    The biggest surprise is how many apps it replaced. Instead of juggling separate apps for notes, habits, mood, activities, and important dates, everything lives in one place now. It's made staying organized a lot simpler.

    Paying once and knowing I won't lose access to my workflow because I canceled yet another subscription is incredibly refreshing. That peace of mind is worth a lot to me.

  2. Feature rich

    The best thing about this: No subscription model, it's a one-time fee for a lifetime license. But you can start for free with the generous freemium model. I only needed to upgrade to pro because I wanted to use the app on my phone, laptop and desktop. Highly recommended! Btw, it's a perfect markdown editor as well, not sure why they don't emphasize this more.

Social recommendations and mentions

Based on our record, Abnormal Security seems to be more popular. It has been mentiond 8 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Abnormal Security mentions (8)

  • Ask HN: Email solution for vulnerable user (moderation required)?
    Https://abnormalsecurity.com/ This is really cool, high fidelity from my tests. - Source: Hacker News / about 3 years ago
  • Impersonation Protect tons of Newly Observed Domain Match
    Yea, shits ridiculous.....and Mimecast support has been hot garbage as of late. I can't even get them to pick up the phone. Our renewal is up at the end of the month and this is just further affirmation to replace them with a better product. You may want to give these guys a consideration. Pretty feature rich and pricing is affordable. https://abnormalsecurity.com/. Source: about 3 years ago
  • Accounting got phished. Paid out big bucks
    I’m sure this will get buried but Abnormal has been able to catch stuff like this for us. Source: over 3 years ago
  • Accounting got phished. Paid out big bucks
    Abnormal Security https://abnormalsecurity.com/. Source: over 3 years ago
  • CFO Getting Hammered with Spam
    We started using a third party email security vendor on top of Defender. It catches so much more. I am sure there are a few out there but we are using https://abnormalsecurity.com/ I think even if you just signed up for a demo they would be able to assist and you could take some action from there. Source: over 3 years ago
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PrivacyNotes mentions (0)

We have not tracked any mentions of PrivacyNotes yet. Tracking of PrivacyNotes recommendations started around Jun 2026.

What are some alternatives?

When comparing Abnormal Security and PrivacyNotes, you can also consider the following products

Cisco Email Security - Cisco Email Security protects against ransomware, business email compromise, spoofing, and phishing.

Obsidian.md - A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.

Vade for Microsoft 365 - Vade for Microsoft 365 is a top-notch email security solution that is specifically aimed to help MSPs protect their networks from adversaries.

Standard Notes - A safe place for your notes, thoughts, and life's work

Trustwave Secure Email Gateway - Trustwave Secure Email Gateway helps protect your email environment against modern threats such as malware, ransomware and phishing, and helps prevent loss of sensitive corporate data.

Apple Notes - Apple Notes functions as a service for making short text notes.