Mastros vs SlideSieve

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

Mastros compared with SlideSieve
Detail	Mastros	SlideSieve
What it does	Privacy-first Chrome extensions that export chat and social media data to spreadsheets	Auto-capture slides from course videos into clean PDFs with synced transcripts
Stage	Startup	Not given
Founded	2026	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
Pricing	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:	Free Plan: $0 forever with up to 50 slides and 3 transcript trials. 3-Month Access (Students): $6.99 one time, expires 90 days after purchase. Pro Lifetime (Best Value): $16.99 one time (originally $24.99, 32% launch discount), pay once and use forever with unlimited slides, transcripts, and PDF exp
Key features	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	Automatic slide detection that identifies real slide frames and skips instructor webcams, code editors, and transitions Transcript extraction with automatic pulling from supported platforms in Timed View or Readable View Manual snap capture with keyboard shortcuts (Ctrl+Shift+9) for code, notebooks, and demos Customizable Slide Detection Zone to manually define capture area or set exclusion zones PiP Magic Eraser that removes webcam overlays and fills background areas smoothly Deduplication that skips duplicate slides while preserving bullet builds and progressive reveals Multi-View Slide Browser with grid, list, and full-screen presentation views
What makes it different	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	Works across multiple platforms (DeepLearning.AI, Coursera, Udemy, YouTube) with same toolbar and workflow Free plan with 50 slide captures and 3 transcript trials, no credit card or signup required Lifetime Pro ownership model ($16.99 one time) with all future features included and no recurring subscriptions Supports Chromium-based browsers (Chrome, Edge, Brave, Opera, Arc) officially and on other variants
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)	35 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	10	0
Citation Flow (Majestic)	28	16
Referring domains (Majestic)	54	3

5 details filled in for both companies.

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