Mailvex 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.

Mailvex compared with Oswin Data
Detail	Mailvex	Oswin Data
What it does	AI email builder that applies your brand automatically	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 plan with no time limit; Starter $12/month or $10/month billed yearly; Pro $27/month or $23/month billed yearly; Agency $119/month or $99/month billed yearly.	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	Brand book PDF upload with automatic style extraction	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	No coding or design skills required Build first email in 15 minutes 164 templates available free forever	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)	9 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	25	5
Citation Flow (Majestic)	23	28
Referring domains (Majestic)	25	69

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