Mastheads™ vs Oswin Data

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

Mastheads™ compared with Oswin Data
Detail	Mastheads™	Oswin Data
What it does	Source-backed articles with real bylines and fact-checking	Datasets for RAG, fine-tuning and training built from public sources
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Paid
Pricing	Free trial: 7 days, 10 articles, no card required. Starter: $83/month (introductory price, standard $124/month), 40 articles/month, up to 3 sites, billed annually. Growth: $208/month (introductory price, standard $333/month), 120 articles/month, up to 10 sites, billed annually. Pro: $499/month (intr	Web Corpus: starter sets from $49 (250,000-500,000 documents); shelf corpora from $99-$199 per shelf (one-time license); Everything (full crawl) $3,000 one-time; Whole Library (all builds for one year) $5,000 per year. Reference Collections: Encyclopedia $1,200 commercial or $349 research (one-time)
Key features	Ten editorial desks that research, write, fact-check and publish Source-backed writing with inline citations AI fact-checking against actual sources fetched Named editor of record on every article AI-generated original cover images CMS integration with WordPress, Ghost, Webflow, Shopify, HubSpot, GoHighLevel Publish on your own schedule with review-by-default Multi-language support with native local registers Content API with export options Topic research and story discovery	Web corpus with 100.7M documents and 105B tokens from Common Crawl Documents scored with Bear Rank and shelved by subject 15 million encyclopedia entries with sources and model attribution 200 million synthetic Q&A records with metadata Delivered as JSONL and Parquet formats Free samples available on Hugging Face Command-line client with resumable downloads and SHA-256 verification Statistics collection with 7,000 topics and 140,000 figures Glossaries for 10,000 topics with one million definitions Book Q&A dataset with 8,000 titles for reading comprehension
What makes it different	Autonomous publishing with human editorial control and named bylines Every claim fact-checked against sources actually fetched, not guessed Customer owns all content outright with no lock-in No paywall scraping or deliberate defeats of access controls	All datasets built only from public sources with full provenance tracking Every record includes source attribution and licensing information Eight curated subject shelves for targeted corpus selection Flexible purchasing: buy individual shelves, slices, or entire library Over 4 TB of clean, deduplicated text ready for machine learning
Community votes	0	0
DR (Domain Rating by Ahrefs)	7 +2 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	10	5
Citation Flow (Majestic)	29	28
Referring domains (Majestic)	81	69

5 details filled in for both companies.

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