--- title: "promptflow vs open-webui" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/microsoft-promptflow-vs-open-webui-open-webui" tools: ["microsoft-promptflow", "open-webui-open-webui"] --- # promptflow vs open-webui *GraphCanon updated Jul 11, 2026* ## Verdict Pick promptflow when license: promptflow is MIT, open-webui is Other; pick open-webui when license: open-webui is Other, promptflow is MIT. [promptflow](https://microsoft.github.io/promptflow/) reports 11k GitHub stars, 1.1k forks, and 77 open issues, last pushed Jul 9, 2026. [open-webui](https://openwebui.com) has 145k stars, 21k forks, and 391 open issues, last pushed Jul 10, 2026. Figures are from public GitHub metadata via [promptflow's repository](https://github.com/microsoft/promptflow) and [open-webui's repository](https://github.com/open-webui/open-webui). | | [promptflow](/tools/microsoft-promptflow.md) | [open-webui](/tools/open-webui-open-webui.md) | | --- | --- | --- | | Tagline | Build high-quality LLM apps - from prototyping, testing to production deployment and monitoring. | User-friendly AI Interface (Supports Ollama, OpenAI API, ...) | | Stars | 11,180 | 145,029 | | Forks | 1,109 | 21,005 | | Open issues | 77 | 391 | | Language | Python | Python | | Adopt for | - | Suitable for developers working with large language models who require a user-friendly interface and support for multiple APIs including Ollama and OpenAI. | | Persona | - | - | | Runtime | - | - | | License | MIT | Other | | Categories | Evaluation & Observability, Inference & Serving, LLM Frameworks | Inference & Serving, LLM Frameworks | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [promptflow](/tools/microsoft-promptflow.md) | [open-webui](/tools/open-webui-open-webui.md) | | --- | --- | --- | | Days since push | 1d | 0d | | Open issues (now) | 77 | 391 | | Security scan | No lockfile | No MCP manifest | | Full report | [trust report](/tools/microsoft-promptflow/trust.md) | [trust report](/tools/open-webui-open-webui/trust.md) | ## Decision facts: open-webui - **Adopt for:** Suitable for developers working with large language models who require a user-friendly interface and support for multiple APIs including Ollama and OpenAI. ## Choose when ### Choose promptflow if… - License: promptflow is MIT, open-webui is Other. - Tags unique to promptflow: ai-application-development, ai-applications, chatgpt, gpt. - Also covers Evaluation & Observability. ### Choose open-webui if… - License: open-webui is Other, promptflow is MIT. - Tags unique to open-webui: openai, self-hosted. - When you need to integrate multiple AI services, such as Ollama and OpenAI, into a unified user interface. ## When NOT to use promptflow - Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers. - Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic. - LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. ## When NOT to use open-webui - When looking for tooling that exclusively supports APIs other than Ollama and OpenAI, as these are specific areas of focus for open-webui. - If the requirement is a highly specialized interface tailored to specific tasks rather than a general AI interaction platform. ## Common questions ### What is the difference between promptflow and open-webui? promptflow: Build high-quality LLM apps - from prototyping, testing to production deployment and monitoring.. open-webui: User-friendly AI Interface (Supports Ollama, OpenAI API, ...). See the comparison table for live GitHub stats and shared categories. ### When should I choose promptflow over open-webui? Choose promptflow over open-webui when License: promptflow is MIT, open-webui is Other; Tags unique to promptflow: ai-application-development, ai-applications, chatgpt, gpt; Also covers Evaluation & Observability. ### When should I choose open-webui over promptflow? Choose open-webui over promptflow when License: open-webui is Other, promptflow is MIT; Tags unique to open-webui: openai, self-hosted; When you need to integrate multiple AI services, such as Ollama and OpenAI, into a unified user interface. ### When should I avoid promptflow? Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers. Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic. LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. ### When should I avoid open-webui? When looking for tooling that exclusively supports APIs other than Ollama and OpenAI, as these are specific areas of focus for open-webui. If the requirement is a highly specialized interface tailored to specific tasks rather than a general AI interaction platform. ### Is promptflow or open-webui more popular on GitHub? open-webui has more GitHub stars (145,029 vs 11,180). Stars measure visibility, not whether either tool fits your constraints. ### Are promptflow and open-webui open source? Yes - both are open-source projects on GitHub (promptflow: MIT, open-webui: Other). ### Where can I find alternatives to promptflow or open-webui? GraphCanon lists graph-backed alternatives at [promptflow alternatives](/tools/microsoft-promptflow/alternatives) and [open-webui alternatives](/tools/open-webui-open-webui/alternatives) ([promptflow markdown twin](/tools/microsoft-promptflow/alternatives.md), [open-webui markdown twin](/tools/open-webui-open-webui/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/microsoft-promptflow-vs-open-webui-open-webui.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, promptflow or open-webui? promptflow: Very active. open-webui: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for promptflow and open-webui? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [promptflow trust report](/tools/microsoft-promptflow/trust); [open-webui trust report](/tools/open-webui-open-webui/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=microsoft-promptflow`](/api/graphcanon/graph?tool=microsoft-promptflow) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_