PDF Pals vs Sigma AI Browser (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
Not comparable
Not comparable: Sigma AI Browser does not list a price
Free plan
Sigma AI Browser
Only Sigma AI Browser has one
Higher rating
PDF Pals
4.0 against 3.8
Same job?
Yes
Both are Productivity tools

Side by side

Compared on	PDF Pals	Sigma AI Browser
Our rating	4.0Better	3.8
Starts at	$29/mo	Free
Free plan	No	YesBetter
Category	Productivity	Productivity
Plans	From $29/mo	Free
Key features	Local document storage with no file upload to vendor servers Bring-your-own API key support for OpenAI, Azure, and OpenRouter OCR engine for scanned PDFs and complex forms Multi-PDF chat across several documents at once API key storage secured through the Apple Keychain	AI agent for form filling, booking and data gathering Eclipse local model running offline Chat with page and deep research Built-in ad blocker and encrypted private profiles Quick Translate and extension support
Pros	Local-first design addresses real privacy concerns around uploading sensitive PDFs One-time purchase avoids the recurring cost of subscription competitors Bring-your-own-key model lets users control their own AI spending	A local offline model is what makes the privacy claim credible Agent, chat, research and translation in one browser macOS, Windows and iOS builds available now
Cons	Mac-only, with no Windows or web version for cross-platform teams Requires a separate OpenAI, Azure, or OpenRouter account and API key to function One-time price includes only one year of updates before further cost	No pricing published, only a discount code The local model is weaker than a hosted one An agent with browser control acts inside every logged-in session
Company	Podzim LLC, founded 2023	Sigmabrowser OU

Prices come from each vendor's pricing page, last checked 20260814. Check the vendor before you buy.

FAQ

Questions people ask

Is PDF Pals better than Sigma AI Browser?

In our reviews PDF Pals scores 4.0 and Sigma AI Browser scores 3.8. The better pick depends on the job. PDF Pals: Native Mac app for chatting with PDFs locally using your own OpenAI or Azure API key. Sigma AI Browser: Private browser with an agent that fills forms and books things, plus an offline local model.

Which is cheaper, PDF Pals or Sigma AI Browser?

PDF Pals: from $29/mo. Sigma AI Browser: free.

Do PDF Pals and Sigma AI Browser have free plans?

Only Sigma AI Browser has a free plan.

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