---
title: "PDF.ai vs Vellum"
page: "https://launch.backlinkbot.ai/compare/pdf-ai-vs-vellum"
category: "AI & ML"
---

# PDF.ai vs Vellum

Compared on numbers BacklinkBot Launch measures: Domain Rating (Open PageRank x10), its 90-day trend, referring domains and pricing.

| | PDF.ai | Vellum |
|---|---|---|
| Category | AI & ML | AI & ML |
| Pricing | Pricing not stated | Pricing not stated |
| Domain Rating | 56 | 71 |
| DR change, 90 days | +2 in 90 days | +1 in 90 days |
| Referring domains | 412 | 785 |
| Upvotes | 0 | 0 |

## How they differ

- Vellum has the stronger domain: a Domain Rating of 71 against PDF.ai's 56, from 785 referring domains.
- Over the last 90 days PDF.ai grew its DR faster (+2 in 90 days, against +1 in 90 days for Vellum).

## PDF.ai

Chat with your PDFs and get answers with citations. (https://pdf.ai)

## Vellum

The dev platform for building production LLM features. (https://vellum.ai)