OpenSilver is an open-source framework for modernizing legacy Microsoft Silverlight and WPF applications. It enables developers to build cross-platform web apps using C#, XAML, and .NET, ensuring 100% code reusability. It features an AI-enhanced UI designer and MAUI Hybrid integration for extending apps to web, desktop, and mobile, significantly reducing migration time and costs.
promptfoo is a comprehensive testing and evaluation framework for Large Language Models (LLMs). It helps developers and enterprises compare prompt quality, evaluate model performance, and enhance AI security through systematic testing, benchmarking, and AI-powered red teaming. It supports over 50 LLM providers, including local models, and offers a developer-friendly CLI for seamless integration into development workflows.
OpenSilver is an open-source framework for modernizing legacy Microsoft Silverlight and WPF applications. It enables developers to build cross-platform web apps using C#, XAML, and .NET, ensuring 100% code reusability. It features an AI-enhanced UI designer and MAUI Hybrid integration for extending apps to web, desktop, and mobile, significantly reducing migration time and costs.
promptfoo is a comprehensive testing and evaluation framework for Large Language Models (LLMs). It helps developers and enterprises compare prompt quality, evaluate model performance, and enhance AI security through systematic testing, benchmarking, and AI-powered red teaming. It supports over 50 LLM providers, including local models, and offers a developer-friendly CLI for seamless integration into development workflows.
| Feature | OpenSilver | promptfoo |
|---|---|---|
| Primary category | Framework | Low Code No Code |
| Added | 2025-08-13 | 2025-08-03 |
| Pricing | Paid | Freemium |
| Official website | opensilver.net | www.promptfoo.dev |
| Product type | Website | Website |
| Performance data | ||
| User rating | Not verified | Not verified |
| Comments | 0 | 0 |
| Monthly visits | 9.8K | 160.6K |
| Monthly growth | 75.8% | -14.7% |
| Favorites | 114 | 108 |
| Details | View details | View details |
Compare OpenSilver and promptfoo by monthly reach, traffic trend, visit depth, top regions, and acquisition sources.
In the OpenSilver vs promptfoo monthly traffic comparison, OpenSilver currently shows 9.8K visits and promptfoo shows 160.6K; promptfoo has about 16.5 times the visible traffic of OpenSilver, an absolute difference of about 150.9K visits. This reflects visible reach, not feature quality or paid users.
Both tools provide verified traffic details, so monthly trends, visit depth, regions, and acquisition sources can be compared on the same basis.
| Country/region | Percentage | Traffic |
|---|---|---|
| 🇺🇸United States | 29.34% | 2.9K |
| 🇧🇷Brazil | 20.95% | 2K |
| 🇷🇺Russia | 19.22% | 1.9K |
| 🇩🇪Germany | 17.44% | 1.7K |
| 🇸🇦Saudi Arabia | 13.05% | 1.3K |
| Country/region | Percentage | Traffic |
|---|---|---|
| 🇺🇸United States | 44.82% | 72K |
| 🇮🇳India | 19.97% | 32.1K |
| 🇻🇳Vietnam | 16.77% | 26.9K |
| 🇩🇪Germany | 10.56% | 17K |
| 🇮🇩Indonesia | 7.88% | 12.7K |
| Source type | Percentage | Traffic |
|---|---|---|
| Direct | 71.16% | 114.3K |
| Referral | 28.69% | 46.1K |
| 0.15% | 241 |
This in-depth OpenSilver vs promptfoo comparison uses only the product records, taxonomy, audience, traffic, and community signals available on this page. OpenSilver is primarily listed under “Framework”, while promptfoo is primarily listed under “Low Code No Code”, so the first decision is whether your actual task matches their recorded scope.
The structured fields currently show these decision-relevant differences: Primary category (OpenSilver: Framework; promptfoo: Low Code No Code); Pricing (OpenSilver: Paid; promptfoo: Freemium); Monthly visits (OpenSilver: 9.8K; promptfoo: 160.6K); Monthly growth (OpenSilver: 75.8%; promptfoo: -14.7%); Favorites (OpenSilver: 114; promptfoo: 108). These facts are more useful for selection than brand visibility alone.
In the OpenSilver vs promptfoo monthly traffic comparison, OpenSilver currently shows 9.8K visits and promptfoo shows 160.6K; promptfoo has about 16.5 times the visible traffic of OpenSilver, an absolute difference of about 150.9K visits. This reflects visible reach, not feature quality or paid users.
Both tools provide verified traffic details, so monthly trends, visit depth, regions, and acquisition sources can be compared on the same basis.
If public market visibility is an important first-pass criterion, investigate promptfoo first. The final choice should still follow taxonomy, use case, and a real trial because higher traffic does not prove broader capabilities or better workflow fit.
OpenSilver and promptfoo currently overlap in shared categories: Low Code No Code; shared tags: open source. This can place both on the same shortlist, but it does not prove equal implementation, depth, or cost.
OpenSilver's unique categories/tags are Framework, Migration, application migration, c++, cross-platform development, legacy modernization, MAUI, and .NET; promptfoo's are Testing, Prompt Engineering, Ai Security, AI security, cli, developer tools, LLM evaluation, and model comparison. These unique fields are the strongest differentiators: validate the product whose recorded scope matches the task instead of following traffic alone.
OpenSilver has no verified rating, 0 comments, 114 favorites, and 103 likes；promptfoo has no verified rating, 0 comments, 108 favorites, and 89 likes。
Neither product has enough rating or comment samples for a credible reputation ranking.
Put OpenSilver on the priority trial list when the task aligns with “Framework” and especially Framework, Migration, application migration, c++, cross-platform development, and legacy modernization. This follows recorded positioning and does not imply unlisted capabilities are absent.
OpenSilver also currently records: pricing is paid, product type is website, 9.8K verified monthly visits, no verified user rating. Verify any hard requirement around price, platform, or reach before trial, and do not let sparse review data substitute for testing.
Put promptfoo on the priority trial list when the task aligns with “Low Code No Code” and especially Testing, Prompt Engineering, Ai Security, AI security, cli, and developer tools. This follows recorded positioning and does not imply unlisted capabilities are absent.
promptfoo also currently records: pricing is freemium, product type is website, 160.6K verified monthly visits, no verified user rating. Verify any hard requirement around price, platform, or reach before trial, and do not let sparse review data substitute for testing.
The available data describes positioning, public visibility, and community signals, but it cannot prove output quality, speed, integration effort, privacy, or long-term cost in your workflow. Before deciding, run the same representative tasks in OpenSilver and promptfoo, then record completion time, accuracy, manual corrections, and the real paid threshold. A like-for-like trial turns this comparison into a defensible adoption decision.
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Low Code No Code
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