OnUml vs Pentest.fyi
Side-by-side comparison to help you choose the right AI tool.

OnUml
OnUML uses AI to instantly create UML diagrams from your natural language descriptions or Mermaid code.
Pentest.fyi
Discover and connect with top penetration testing companies worldwide tailored to your specific needs.
Feature Comparison
OnUml
AI Smart Chat
This is the star feature of OnUml. Instead of memorizing complex Mermaid syntax, you can describe your diagram needs in natural language. For example, you can type "Create a sequence diagram for a user login process with a database check" and the AI will generate the corresponding, syntactically correct Mermaid code for you. It acts as your intelligent design partner, translating your ideas into a structured diagram format instantly, which is perfect for brainstorming or quick documentation.
Live Diagram Rendering & Preview
As you type in the Mermaid editor or receive code from the AI chat, a live preview pane updates in real-time. This WYSIWYG (What You See Is What You Get) experience allows for immediate feedback. You can see exactly how your diagram will look as you build it, making it incredibly easy to spot errors, adjust layouts, and iterate on your design without any frustrating back-and-forth between coding and viewing.
Built-in Mermaid Editor with Smart Hints
For users who prefer direct control or want to fine-tune the AI's output, OnUml provides a clean, minimalist code editor dedicated to Mermaid syntax. It includes smart code hints and automatic syntax fixes to help you write valid code faster. This feature is ideal for learning Mermaid or for making precise adjustments to complex diagrams that require a developer's touch.
Diagram Export and Organization
Once your diagram is perfect, OnUml lets you export it in high-quality formats like PNG and SVG, making it simple to share in documentation, presentations, or reports. The platform also emphasizes ease of use with code saving and organization features, allowing you to keep your projects tidy and accessible for future edits, all without requiring any user registration.
Pentest.fyi
Extensive Company Database
Pentest.fyi boasts an extensive database of over 7,599 penetration testing companies, making it one of the largest directories available. This wealth of options allows users to find service providers that best fit their specific needs, whether they are looking for web application testing or more specialized services.
Advanced Search and Filtering Options
The platform offers advanced search and filtering capabilities, enabling users to refine their searches based on geographic regions, company sizes, CVE publication activity, and various certifications. This feature ensures that users can easily locate companies that align with their specific requirements and qualifications.
Detailed Company Profiles
Each company listed on Pentest.fyi has a detailed profile that showcases the types of penetration testing services offered. This includes web application testing, network testing, cloud-native testing, and many other specialized security assessments, allowing users to understand the scope of services available.
Featured Listings
Pentest.fyi highlights both standard and featured company listings, providing additional visibility for certain companies. This feature helps users discover top-rated providers and leads to more informed decisions when choosing a penetration testing partner.
Use Cases
OnUml
Software Architecture Documentation
Developers and architects can quickly draft and iterate on system design diagrams, such as class diagrams, component diagrams, or deployment diagrams. By describing the system components and their relationships to the AI, they can generate visual documentation that is essential for team alignment and technical specs, speeding up the design phase significantly.
Creating Technical Tutorials and Guides
Technical writers and educators can use OnUml to effortlessly generate flowcharts and sequence diagrams to embed in tutorials, blog posts, or course materials. The AI chat simplifies the process of creating clear, visual explanations of complex processes, making technical content more engaging and easier for readers to understand.
Planning and Visualizing Workflows
Project managers and analysts can map out business processes, user journeys, or algorithm flows. By conversing with the AI to create activity diagrams or flowcharts, they can visualize steps, decision points, and outcomes, which is invaluable for process optimization, onboarding, and team discussions.
Rapid Prototyping and Brainstorming
During planning meetings or brainstorming sessions, teams can use OnUml in real-time to visualize ideas. Instead of sketching on a whiteboard, they can type a prompt like "show a user signing up, verifying email, and accessing a dashboard" and immediately get a shareable, professional diagram to center the discussion and capture decisions.
Pentest.fyi
Finding the Right Penetration Testing Partner
Businesses looking to enhance their security can utilize Pentest.fyi to find the right penetration testing company that meets their specific needs. By leveraging the platform's extensive database and filtering options, organizations can identify companies that specialize in their required services.
Researching Company Credentials
Pentest.fyi allows users to research the credentials of various penetration testing firms, including certifications and CVE publication activity. This enables companies to ensure they are partnering with reputable providers who possess the necessary qualifications to deliver effective security assessments.
Comparing Service Offerings
With detailed company profiles available, users can easily compare the service offerings of different penetration testing companies. This feature assists organizations in understanding the unique capabilities of each provider and making an informed choice based on their specific security requirements.
Enhancing Cybersecurity Strategies
By using Pentest.fyi, organizations can improve their overall cybersecurity strategies by selecting the most suitable penetration testing services. The platform facilitates informed decision-making, ultimately contributing to a stronger security posture and effective risk management.