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StampR.eu VS https://open-gpt.app/

Compare StampR.eu VS https://open-gpt.app/ and see what are their differences

StampR.eu

Verifiable authorship evidence for digital files using qualified electronic timestamps.

Rating
0 reviews
Pricing
Paid €4.9 / Usage
Alternatives Is it good?
https://open-gpt.app/

Create ChatGPT Application in seconds

Rating
0 reviews
Alternatives Is it good?
YFolio AI
Smart OCR, automated tagging, and seamless document management for personal and business use. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Base details

Website, pricing, platforms and company facts side by side.

StampR.eu
https://open-gpt.app/
Website stampr.eu open-gpt.app
Pricing
Paid €4.9 / Usage Official pricing
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Platforms
Web
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Company Startup from Bulgaria · 1 - 9 employees · 2025 —
Listed in
Copyrights, Patents And IP Services Digital Signatures Timestamps Legal Online Services Document Management +3
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About StampR.eu and https://open-gpt.app/

In their own words, as submitted to SaaSHub.

StampR.eu
https://open-gpt.app/

StampR helps creators and professionals create verifiable evidence for a specific version of a digital work before it is shared. The platform issues a certificate that links an authorship declaration to the SHA-256 fingerprint of the file and to a qualified electronic timestamp. The timestamp is...

Read more about StampR.eu

No description of https://open-gpt.app/ yet.

Features and specs

What each product offers, as listed by its team.

StampR.eu 8 features
https://open-gpt.app/ 5 features
  • Qualified Electronic Timestamp
    Creates verifiable time evidence using a qualified electronic timestamp from BORICA B-Trust under eIDAS.
  • SHA-256 File Fingerprint
    Generates a SHA-256 fingerprint for the exact version of the certified file.
  • Authorship Declaration
    Records the user's declaration of authorship for the specific digital work being certified.
  • PDF Certificate
    Issues a downloadable certificate containing the work details, fingerprint, timestamp and unique certificate number.
  • Public Verification
    Certificates can be independently checked through a public verification page.
  • QR Code Verification
    Each certificate includes a QR code linking to its verification record.
  • Local File Hashing
    The file fingerprint is generated locally in the browser before certification.
  • Private File Handling
    The original file does not need to be stored by StampR unless the user explicitly chooses to store it.
  • Accessible AI Chat Interface
    Provides a user-friendly web-based interface for interacting with GPT-based AI models without needing to set up API access or coding knowledge.
  • No Installation Required
    Being a web application, it can be used directly from a browser without downloading or installing any software.
  • Potentially Free or Low-Cost Access
    Many GPT wrapper sites like this offer free tiers or lower-cost access compared to official API pricing, making AI chat more accessible to casual users.
  • Quick Setup
    Users can typically start chatting almost immediately after visiting the site, with minimal account creation or configuration steps.
  • Cross-Platform Compatibility
    Since it runs in a browser, it can be accessed from various devices including desktops, tablets, and smartphones without platform-specific versions.

Possible disadvantages

  • Uncertain Reliability
    Third-party GPT wrapper websites often depend on underlying API access that can be unstable, rate-limited, or discontinued without notice, affecting consistent availability.
  • Data Privacy Concerns
    Using an unofficial third-party service to process conversations raises questions about how user data and conversation history are stored, used, or shared.
  • Limited Transparency
    It may be unclear which underlying AI model version is being used, how up-to-date it is, or what modifications have been made to the base model's behavior.
  • Potential Hidden Costs or Ads
    Free-to-use AI wrapper sites often monetize through ads, premium upsells, or data collection, which may not be clearly disclosed to users upfront.
  • Lack of Official Support
    Unlike official AI platforms, unofficial wrapper sites may lack dedicated customer support, regular updates, or accountability if issues arise.

Analysis

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

StampR.eu
https://open-gpt.app/

No analysis of StampR.eu yet.

Overall verdict

  • I don't have verified, up-to-date information about open-gpt.app, and I'm unable to browse the internet to check its current status, reputation, or legitimacy. I cannot confidently vouch for or against this specific product/service.

Why this product is good

  • I lack real-time access to verify this website's current content, reputation, or user reviews
  • Domain names and their associated services can change ownership and purpose over time
  • Without verification, I cannot confirm if this is a legitimate service, its features, or its safety
  • There are many similarly-named AI tools of varying quality and trustworthiness, making specific verification important

Recommended for

  • Before using this site, research current user reviews on trusted platforms
  • Check the site's SSL certificate, privacy policy, and terms of service
  • Look for verified information about the company or developers behind it
  • Consider well-established alternatives like ChatGPT (OpenAI), Claude (Anthropic), or Gemini (Google) if you need reliable AI assistance
  • Exercise caution with any site requesting payment or personal information without clear verification of legitimacy

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
StampR.eu
https://open-gpt.app/
100% 100%
Digital Signatures
0% 0%
100% 100%
Copyrights, Patents And IP Services
0% 0%
100% 100%
Timestamps
0% 0%

Questions & Answers

As answered by people managing StampR.eu and https://open-gpt.app/.

Which are the primary technologies used for building your product?

StampR.eu's answer

Web application, SHA-256 cryptographic hashing, electronic timestamping, PDF certificate generation, QR-based verification and server-side certificate verification infrastructure.

What makes your product unique?

StampR.eu's answer

StampR combines an authorship declaration for a specific digital work with the SHA-256 fingerprint of that exact file version and a verifiable electronic timestamp. The result is a certificate that documents what was certified, who declared authorship, and when that specific version was recorded. Certificates include a unique identifier and can be checked through StampR’s verification workflow.

Why should a person choose your product over its competitors?

StampR.eu's answer

StampR is designed for people who want a simple way to create verifiable evidence before sharing digital work. It focuses on the exact file version being certified, uses cryptographic fingerprinting, provides a downloadable certificate, and supports independent verification. It also avoids presenting the service as copyright registration: copyright exists independently, while StampR creates evidence around authorship declaration, file identity, and time.

How would you describe the primary audience of your product?

StampR.eu's answer

StampR is primarily for creators, freelancers, professionals and organizations that need to document a digital work before sharing it externally. Typical use cases include music, photography, design, written works, source code, research, concepts, drafts and other digital files where proving the existence of a specific version at a particular time can be useful.

What's the story behind your product?

StampR.eu's answer

StampR was built around a practical problem: digital work is often shared with clients, collaborators, publishers or platforms before there is a clear, independently verifiable record of the exact version that existed beforehand. StampR turns that step into a straightforward workflow by combining file fingerprinting, an authorship declaration, timestamp evidence and a certificate that can later be verified.

User comments

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