Sejda vs Stirling PDF

as AI assistants see them, week of 2026-10-26

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Sejda and Stirling PDF land close overall, scoring 16 and 17 out of 100. Sejda gets named in 19 of 68 answers, Stirling PDF in 17 of 68. Sejda shows up most for browser-based PDF editing (4 of 4 answers), free editors (3 of 3), and subscription-free tools (3 of 3), but never for redaction, OCR, or open-source questions. Stirling PDF, by contrast, sweeps the open-source or self-hosted question (3 of 3 answers) and does well on privacy questions (2 of 3), though it's absent from redaction, form-filling, and conversion questions. Head-to-head, each tool leads in 5 questions, with 10 ties.

Head to head

metric	Sejda	Stirling PDF
score	14	16
questions won	13	16

By assistant

Sejda

assistant	score	named in, this week	usual spot, this week
ChatGPT	16	25% of answers	#3.0
Claude	19	50% of answers	#8.7
Gemini	not sampled this week
Perplexity	not sampled this week

Stirling PDF

assistant	score	named in, this week	usual spot, this week
ChatGPT	6	10% of answers	#2.0
Claude	31	60% of answers	#6.2
Gemini	not sampled this week
Perplexity	not sampled this week

Where they differ

Only Sejda gets named for

What's the best tool to fill in and sign a PDF form?
What's the best PDF editor for Mac?

Only Stirling PDF gets named for

Which PDF tool is best for privacy and sensitive documents?
What's the best open-source or self-hosted PDF tool?
What's the best OCR tool to make a scanned PDF searchable?
Which PDF editor is best value for a small business?
What are the best alternatives to PDF-XChange Editor?

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