OpenSign™
Enterprise-Level Document Signing Goes Open-Source
PDF Hippo
Convert Excel Designs To PDF Template APIs In Two Clicks
Updated June 2026
| OpenSign™ | PDF Hippo | |
|---|---|---|
| Rating | 4.0★ | 4.5★ |
| Reviews | 2 | 2 |
| Pros | 0 | 0 |
| FactScore™ | 19.1 | 21.5 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in OpenSign™ — Pros
No unique pros listedBoth tools — Pros
—Only in PDF Hippo — Pros
No unique pros listedOnly in OpenSign™ — Cons
—Both tools — Cons
—Only in PDF Hippo — Cons
—Details
| OpenSign™ | PDF Hippo | |
|---|---|---|
| Categories | File storage and sharing apps, PDF Editor, E-signature apps | PDF Editor, No-code Platforms, Data visualization tools |
| Platforms | Web | Web |
| Added | October 26, 2023 | September 20, 2023 |
| Website | www.opensignlabs.com | www.pdfhippo.com |
Who Should Pick Which?
Choose OpenSign™ if...
- No unique pros listed
Choose PDF Hippo if...
- No unique pros listed
With a FactScore™ of 19.1 vs 21.5, PDF Hippo leads in community reception. OpenSign™ uniquely offers No unique pros listed, while PDF Hippo stands out for No unique pros listed.
What Users Say
OpenSign™
I work as a freelancer, and one of my clients uses this tool for digitally signing all agreements between us. I decided to give it a try as well, and what I like most is how affordable it is while ...
The best digital signing solution, with a simple user interface that I really like. It also offers a self-hosting feature that other alternative tools don't provide.
PDF Hippo
Dear HIPPO team! Congrats on the launch! Idea is absolutely clear. Long time I used to work as a CEO in one advertising business and every day I prepared invoices (with a №, purposes, payer, date)....
Is it possible to integrate it with airtable or say retool?
Related Comparisons
Frequently Asked Questions
Which is better, OpenSign™ or PDF Hippo?
Based on FactScore™, PDF Hippo leads with a score of 21.5 vs 19.1. PDF Hippo has a higher rating of 4.5★ compared to 4.0★.
What are the pros of OpenSign™ compared to PDF Hippo?
OpenSign™ uniquely offers: No unique pros listed.
What are the pros of PDF Hippo compared to OpenSign™?
PDF Hippo uniquely offers: No unique pros listed.
Is OpenSign™ better rated than PDF Hippo?
OpenSign™ is rated 4.0★ from 2 reviews. PDF Hippo is rated 4.5★ from 2 reviews.
What is the FactScore™ of OpenSign™ and PDF Hippo?
FactScore™ weighs rating and review volume together. OpenSign™ scores 19.1 and PDF Hippo scores 21.5.
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