OpenTabs vs Web4 Browser

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

OpenTabs compared with Web4 Browser
Detail	OpenTabs	Web4 Browser
What it does	Your open tabs, grouped, on every new tab	AI antidetect browser and multi-account workspace with true-to-device browser identity
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	HK
Pricing model	Open source	Freemium
Pricing	Free, under the AGPL-3.0-or-later licence. No paid plans, trials or cards.	Free 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
Key features	Shows open tabs from every window grouped by site Close all tabs from a site in one click Close duplicate tabs in one press Merge windows into one Customizable briefing with news topics, markets, weather, calendar and to-do list Optional end-to-end encrypted sync between browsers No account required Instantly loads with no network requests on tab open Automatic stale new tab page closing Works completely offline after initial configuration	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
What makes it different	Only tab manager that shows actual open tabs on the new tab page itself Completely private by design with no account, no tracking and no server storage Zero network delay when opening new tabs Optional sync is end-to-end encrypted so the server never sees your data	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
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	44 no change since last check
Trust Flow (Majestic)	0	8
Citation Flow (Majestic)	13	26
Referring domains (Majestic)	3	54

5 details filled in for both companies.

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