PDF Expert vs Preview

as AI assistants see them, week of 2026-09-21

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PDF Expert and Preview both show up when AI assistants talk PDFs, but Preview edges ahead overall, with a score of 17 versus PDF Expert's 14 and a stronger showing at 21 of 68 answers compared to 15 of 68. Preview also wins more head-to-head match-ups, named more often in 8 questions against PDF Expert's 2, with 10 ties. Both are named in every answer to "What's the best PDF editor for Mac?", and PDF Expert leads on mobile, swept in all 4 answers about the best PDF editor app for iPhone or Android. Neither tool gets a mention for AI summarising, OCR, or open-source questions.

Head to head

metric	PDF Expert	Preview
score	14	17
questions won	7	12

By assistant

PDF Expert

assistant	score	named in, this week	usual spot, this week
ChatGPT	13	15% of answers	#2.3
Claude	18	30% of answers	#5.7
Gemini	not sampled this week
Perplexity	13	20% of answers	#4.8

Preview

assistant	score	named in, this week	usual spot, this week
ChatGPT	4	5% of answers	#3.0
Claude	35	55% of answers	#4.8
Gemini	not sampled this week
Perplexity	13	20% of answers	#5.0

Where they differ

Only PDF Expert gets named for

What's the best PDF editor app for iPhone or Android?

Only Preview gets named for

What's the best tool to edit a PDF without a subscription?
What's the best tool to fill in and sign a PDF form?
What's the best tool to compress a large PDF?
What's the best free PDF editor?
What's the best online PDF editor that works in the browser?
Which PDF editor is best value for a small business?

More comparisons

Not sold on either?

Scores count how often each assistant names a product, weighted by position. How the score works · Full PDF editors leaderboard