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Web4 Browser vs Private Writing Assistant

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Web4 Browser compared with Private Writing Assistant
DetailWeb4 Browser logo Web4 BrowserPrivate Writing Assistant logo Private Writing Assistant
What it doesAI antidetect browser and multi-account workspace with true-to-device browser identity Spelling and grammar checks in 101 languages, run entirely on your device
StageNot given Not given
FoundedNot given Not given
Based inHK Not given
Pricing modelFreemium Free
PricingFree plan includes 3 browser environments with no team members. Starter at $9/month provides 15 environments. Small Team at $19/month includes 1 team member and 55 environments. Popular at $39/month includes 2 team members and 125 environments. Scale Team at $69/month includes 4 team members and 250 Not given
Key features
  • Isolated browser profiles with persistent identity and session data
  • Real-device fingerprinting and AI environment modeling
  • Per-profile proxy and network configuration
  • Browser automation with visual workflows and headless execution
  • Team permissions, roles, and activity logging
  • AI browser workflows and MCP skill integration
  • Multi-environment grouping and workspace organization
  • Profile template copying and batch creation
  • 101 languages supported with automatic language detection
  • Runs on device using Chrome's built-in AI model
  • Works in email drafts, Google Docs, and Google Slides
  • Fix single mistakes or all corrections at once
  • Toggle checking on and off with visible AI status
What makes it different
  • Real-device signals and AI environment modeling instead of manual parameter mixing
  • Isolated execution boundaries with team-level access control and activity logging
  • Unified workspace for profiles, proxy routing, automation, and team handoffs
  • Nothing sent to servers - all processing happens on your device
  • Supports 101 languages with automatic detection
  • Uses Chrome's native AI - no external model required
  • Works seamlessly across text boxes, email, docs and slides
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)44 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)80
Citation Flow (Majestic)260
Referring domains (Majestic)540

4 details filled in for both companies.

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