OpenTabs vs Mastros

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 Mastros
Detail	OpenTabs	Mastros
What it does	Your open tabs, grouped, on every new tab	Privacy-first Chrome extensions that export chat and social media data to spreadsheets
Stage	Not given	Startup
Founded	Not given	2026
Based in	Not given	Not given
Pricing model	Open source	Freemium
Pricing	Free, under the AGPL-3.0-or-later licence. No paid plans, trials or cards.	Free: 100 profiles and 100 messages per month (WhatsApp), or 250 profiles and 300 messages per month (Telegram), or 250 records (LinkedIn). Instagram and TikTok free and unlimited in beta. Pro: $9/month with 5,000 profiles and 10,000 messages per month (WhatsApp), or 5,000 records (LinkedIn). Scale:
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	Export group members and chat messages to CSV, JSON or JSONL Bulk media download from chats Export LinkedIn searches with Sales Navigator support Extract email and website from Instagram and TikTok bios Calculate exact TikTok engagement rates Process all data in the browser with no server involvement Read-only with no automation or message sending
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	Works with no account creation, API key or password required Reads only visible data; cannot reveal hidden information or deleted messages Five tools with the same pricing model and interface Instagram and TikTok extensions are free and unlimited during beta
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	35 no change since last check
Trust Flow (Majestic)	0	10
Citation Flow (Majestic)	13	28
Referring domains (Majestic)	3	54

5 details filled in for both companies.

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