
Adobe Acrobat DC
Foxit Reader
Wondershare PDFelement
PDF-XChange Editor
Foxit PhantomPDF
MuPDF
Adobe Reader
Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.

SysAid
"Server Security Cloud Security Office 365 Security Penetration Testing Load Testing Security Review & Audit Managed Detection & Response Compliance Analysis"
Which is more popular?
Based on our record, Sumatra PDF seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | sumatrapdfreader.org | seqops.io |
| Pricing | — | |
| Company | — | Startup from Sweden · 10 - 19 employees |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Sumatra PDF yet.
SeqOps is a cybersecurity firm offering advanced security solutions such as vulnerability scanning, penetration testing, cloud and server security, and compliance analysis. We help businesses safeguard digital infrastructure with tailored, automated, and proactive protection services.
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Sumatra PDF is especially recommended for users who need a fast and lightweight PDF reader with basic functionalities. It's ideal for those who want a simple tool for reading PDFs and other document formats without the complications of advanced features. It is also suitable for users who value open-source software.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Sumatra PDF my favorite PDF reader for Windows
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Sumatra PDF and SeqOps. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Sumatra PDF Reader is a lightweight PDF reader with the basics of PDF viewing and processing. It works with various versions of the Windows operating system, such as the previous XP, Vista, 7, 8 and the latest Windows...
A free eBook reader for Windows that can act as an all-in-one tool is Sumatra PDF Reader. Besides being free of cost, Sumatra is small and portable, which makes it a fast and lightweight tool for eBook viewing. The...
Being a simple application, the user interface itself is pretty minimal. What’s more, Sumatra does lack some advanced features. Bookmarks, highlights, and other typical features aren’t in the box. Even so, Sumatra is...
We have no reviews of SeqOps yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


You can use your browser for both, there are extensions(FireFox - PDF & EPUB/Chrome - PDF& EPUB) for that. In case, you want you use a separate software for them, I suggest SumatraPDF--it handles both PDFs and .EPUB files. Source: over 3 years ago
Tracking SeqOps since Sep 2025.
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