Privacy Tools Guide

Choose Obsidian Vault for offline-first note storage with client-side encryption, or select Notion with encryption layers if you need cloud collaboration. For highest security with minimal dependencies, use plaintext files encrypted with GPG or age. Each approach trades convenience for control—evaluate your threat model, access patterns, and deployment requirements against each tool’s encryption guarantees to select the best fit.

Evaluation Criteria

The following criteria determine this comparison:

Standard Notes

Standard Notes positions itself as a “basic, encrypted notes app” with a focus on extensibility. It uses AES-256-GCM for note encryption, with keys derived from your master password using Argon2id. The desktop and mobile applications are open-source, and the server component can be self-hosted using Docker.

For developers, Standard Notes offers a web-based editor and a desktop application, but its primary strength lies in the extensibility system. You can install “editors” that range from simple markdown to code-friendly interfaces. The Docker deployment is straightforward:

docker run -d -p 3000:3000 -v sn-data:/data \
  -e TOKEN=helloworld \
  --name standardnotes \
  standardnotes/server

Standard Notes stores encrypted data on their hosted servers by default, but you can switch to a self-hosted deployment. The encryption model ensures that server operators cannot read your notes, as all encryption/decryption happens client-side.

Obsidian with Encrypted Notes

Obsidian has become the preferred choice for many developers due to its local-first approach and markdown-based workflow. While Obsidian itself does not provide built-in end-to-end encryption, you can achieve encryption through community plugins or external tools.

The obsidian-local-rest-api plugin combined with GPG encryption provides a developer-friendly workflow. Create an encrypted note from the command line:

# Encrypt a note using GPG
gpg --symmetric --cipher-algo AES256 --armor secret-note.md
# Decrypt when needed
gpg --decrypt secret-note.md.gpg > secret-note.md

Obsidian’s true strength lies in its local data storage. Your vault resides on your filesystem, giving you complete control. For sensitive information, storing encrypted files in your Obsidian vault folder and decrypting them on-demand provides the flexibility developers need. The graph view, backlinks, and plugin ecosystem make complex knowledge management practical.

Tomb

Tomb is not a note-taking application per se—it’s an encrypted shell manager—but it serves a critical role for developers storing sensitive information. Tomb uses GPG encryption with tomb files acting as encrypted containers mounted as filesystems.

# Create a new tomb
tomb dig -s 100 secrets.tomb
tomb forge secrets.tomb
tomb lock -k secret.key secrets.tomb
tomb open secrets.tomb

# Store sensitive notes in the mounted tomb
echo "API_KEY=sk-abc123" > /media/secret/keys.txt
tomb close secrets.tomb

For developers who prefer a command-line workflow, Tomb provides secure storage without requiring a dedicated application. Notes stored in a mounted tomb exist only in memory when unlocked, providing protection against cold boot attacks.

Cryptee

Cryptee offers encrypted document storage with a focus on privacy. Unlike traditional note-taking apps, Cryptee treats everything as encrypted documents. The application runs entirely in the browser, with client-side encryption using the Web Crypto API.

Cryptee’s strength is its zero-knowledge architecture combined with a polished web interface. You can self-host Cryptee, giving you control over the infrastructure:

docker run -d -p 3000:3000 \
  -e DATABASE_URL=postgres://user:pass@db:5432/cryptee \
  -e JWT_SECRET=your-secret \
  --name cryptee \
  cryptee/cryptee

For developers storing sensitive information, Cryptee provides encrypted file storage with folder organization. The web-based nature means no desktop installation, which can be advantageous in certain security contexts.

Vim with GPG

For developers who live in the terminal, vim combined with GPG provides a lightweight encrypted notes solution. Edit an encrypted file directly:

vim +X secret-notes.txt  # Prompts for encryption password on write

This approach stores notes as GPG-encrypted files on your filesystem. The workflow integrates naturally with version control, development environments, and automation scripts. No cloud services, no proprietary formats—just plain text encrypted with GPG.

Configure vim for automatic GPG handling:

" ~/.vimrc
augroup encrypted_notes
  autocmd BufReadPre *.gpg set let g:is_gpg = 1
  autocmd BufReadPost *.gpg Gpg decrypt buffer
  autocmd BufWritePre *.gpg Gpg encrypt buffer
  autocmd BufWritePost *.gpg set noreadonly nomodified
augroup END

Security Considerations

When evaluating encrypted note-taking applications for sensitive information storage, consider these factors:

Key derivation: Applications should use modern key derivation functions (Argon2id, scrypt, or PBKDF2) to protect against brute-force attacks. Avoid applications using weak KDFs like basic SHA-256.

Zero-knowledge verification: Verify that the server never receives plaintext. Review the source code or use network inspection tools to confirm client-side encryption.

Memory protection: Encrypted notes exist in plaintext in RAM when unlocked. For extreme security requirements, consider tools that clear memory or operate from encrypted ramdisks.

Backup encryption: Ensure encrypted notes remain encrypted in backups. Many cloud sync services offer client-side encryption, but verify this explicitly.

Recommendation Matrix

Application Best For CLI Support Self-Host Encryption
Standard Notes Extensible encrypted notes Limited Yes AES-256-GCM
Obsidian + GPG Local-first developers Via plugins N/A GPG
Tomb CLI-focused users Full N/A GPG
Cryptee Web-based encrypted storage API Yes Web Crypto
Vim + GPG Terminal workflow Full N/A GPG

For most developers, a combination approach works best. Store general notes in Obsidian with GPG-encrypted files for sensitive content. Use Tomb for command-line secrets. The key is understanding that no single application fits every use case—layer your tools based on the sensitivity of the information being stored.

Threat Model Considerations

Different note-taking scenarios present different threats. A developer storing API keys faces different risks than a journalist documenting sources. Understanding your specific threat model guides tool selection.

API Key and Credential Storage: These require absolute zero-knowledge encryption with offline access. Vim with GPG or Tomb provide the strongest guarantees—no cloud services, no synchronization attack surface. Standard Notes self-hosted offers a reasonable alternative if you control the infrastructure.

Collaborative Notes: Teams need share mechanisms. Standard Notes’ extension system enables team access, while Cryptee provides encrypted folder sharing with granular permissions. Tomb and Vim with GPG lack practical team features.

Offline-First Development: Developers working in high-surveillance environments or unreliable networks benefit from Obsidian’s local-first approach. The offline guarantee means notes remain accessible even if cloud services are blocked or compromised.

Search and Organization: Obsidian’s graph view and backlinks create powerful knowledge management. This comes at the cost of not using zero-knowledge encryption—mitigate by encrypting sensitive files with GPG. Cryptee and Standard Notes provide server-side encryption of plaintext, limiting search capabilities.

Encryption Verification Methods

Before trusting a note application with sensitive data, verify its encryption claims independently.

For OpenPGP-based tools, verify the implementation using real-world tests:

# Create a test note, encrypt it with the app
# Export the encrypted file and decrypt outside the app
gpg --decrypt exported-note.gpg | head -20

# If the decrypted output matches the original note,
# the encryption is genuine

For closed-source applications like Cryptee or Standard Notes, examine the source code on GitHub (if available) or review security audit reports from firms like Cure53. Look specifically for:

Advanced Usage: Encrypted Archive Backup

For critical notes, implement immutable encrypted backups outside your primary tool:

# Create a TAR archive of encrypted notes
tar czf - ~/encrypted-notes/ | gpg --symmetric --cipher-algo AES256 > notes-backup-$(date +%Y%m%d).tar.gz.gpg

# Verify backup integrity
gpg --decrypt notes-backup-20260320.tar.gz.gpg | tar tzf - | head

# Store backup on separate storage (external drive, cloud service)
# The GPG encryption ensures confidentiality during transmission and storage

This approach isolates critical information from the primary note-taking application. If your daily app is compromised, the archived notes remain protected.

Performance Characteristics

For developers considering these tools for production use, understand the performance implications:

Standard Notes: Web interface can feel sluggish during initial load due to cryptographic operations. Once loaded, responsiveness is acceptable. Desktop application performs better for large vaults.

Obsidian: Very fast with local storage. Encryption operations (when using GPG) add minimal overhead. Works excellently with 10,000+ notes.

Cryptee: Browser-based encryption adds noticeable latency on slower machines. Acceptable for typical use but not ideal for real-time rapid note-taking.

Vim + GPG: Fastest for command-line workflows. Encryption is transparent to the user. Note: decryption requires passphrase entry on each file open unless using gpg-agent.

Integration with Development Workflows

Developers need notes to integrate with version control and build systems.

Obsidian integrates naturally with Git:

# Initialize Obsidian vault as git repository
cd ~/ObsidianVault
git init
git add .gitignore  # Exclude encrypted files if desired

# Commit changes
git add *.md
git commit -m "Update development notes"

Standard Notes’ export functionality works with Git:

# Export Standard Notes backup
# Import into version control for redundancy

Vim with GPG works directly in Git workflows—encrypted files can be committed directly, with decryption happening at file open time.

Cost Analysis and Selection Matrix

For developers evaluating long-term costs:

Standard Notes: Free tier includes 5 editors and limited extensions. Paid plans start at $99/year for extended functionality. For teams, pricing is per-user but extensibility justifies cost.

Obsidian: One-time $50 purchase includes sync and publish features. No recurring costs. Add-ons are free community contributions. Most affordable for long-term ownership.

Cryptee: Free tier offers 100MB storage. Paid plans ($99/year) include unlimited storage, password-protected documents, and collaborative folders. Mid-range pricing.

Tomb: Completely free, open-source software. Only cost is infrastructure if needed. Lowest cost for command-line developers.

Vim + GPG: Completely free, zero ongoing costs. Only investment is learning time.

For individuals: Obsidian ($50 one-time) offers best value For small teams: Standard Notes ($99/year per user) provides extensibility and team features For developers: Tomb or Vim + GPG for cost-free alternatives For organizations: Standard Notes self-hosted minimizes long-term costs

Real-World Scenario: Security Researcher Workflow

A security researcher documenting zero-day vulnerabilities needs encryption, versioning, and selective sharing. Recommended approach:

# Obsidian vault for general knowledge base
~/Obsidian/SecurityResearch/
  ├── vulnerabilities/
  │   ├── cve-2026-1234.md (general info, public)
  │   └── zero-day-details.md.gpg (sensitive, encrypted)
  ├── research-notes.md (unencrypted, searchable)
  └── .git/ (version control)

# Workflow:
# 1. General notes in Obsidian (full-text search enabled)
# 2. Sensitive details in GPG-encrypted files (outside search index)
# 3. Git tracks all changes (including which files changed)
# 4. Share encrypted POC code via GPG:

gpg --encrypt --recipient collab@example.com exploit-code.c
# Send exploit-code.c.gpg to collaborator
# They decrypt with: gpg --decrypt exploit-code.c.gpg > exploit-code.c

Benefits:

Evaluation Checklist for Choosing Tools

Before committing to a platform, assess against these criteria:

Encryption guarantees:

Usability:

Technical integration:

Compliance:

Cost:

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