
PDFShift
DocRaptor
HTML PDF API
PDFCrowd
HTML2PDF.fr
Api2Pdf
Docamatic
Free, powerful HTML to PDF API supporting both URL and raw HTML conversion. Unlimited document size, lightning-fast and compatible PHP, Python, Ruby, etc.

UserTesting.com
UserZoom
Hotjar
Lookback
Validately
PlaybookUX
Userbrain
A powerful tool which enables user testing on prototypes, wireframes and websites.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | pdflayer.com | loop11.com |
| Pricing | — | |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Loop11 is recommended for UX designers, researchers, product managers, and digital marketers who need to conduct comprehensive usability testing. It’s suitable for teams that require both qualitative and quantitative data to enhance user experiences across web and mobile platforms. Companies and individuals seeking to improve their product design and usability through consistent user feedback will find Loop11 especially beneficial.
Walkthroughs and reviews on video.
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Usability Tools Loop11 Exercise
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using pdflayer and Loop11. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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Loop11 does not provide a pool of participants, therefore you’ll have to issue invites to your own users to receive results for your study. UserZoom has a user base of more than 120 million testers.
When comparing pdflayer and Loop11, you can also consider the following products.

Convert any HTML documents to high-fidelity PDF using a single POST request
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Usability testing has never been easier. Get videos of real people speaking their thoughts as they use websites, mobile apps, prototypes and more!
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As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
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Test, measure, and monitor UX with our cost-effective all-in-one platform. UserZoom is a cloud-based solution for online usability testing.
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Easily generate PDF documents from HTML code with our powerful API
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The #1 Leader in Heatmaps, Recordings, Surveys & More. Sign up for a 15-day free trial and start learning from real user behavior today!
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