--- title: "langstream vs promptmage" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/rogeriochaves-langstream-vs-tsterbak-promptmage" tools: ["rogeriochaves-langstream", "tsterbak-promptmage"] --- # langstream vs promptmage *GraphCanon updated Aug 7, 2026* ## Verdict Pick langstream if langStream is a Python-based tool for building robust Language Model (LLM) applications, emphasizing modularity and composability; pick promptmage if promptmage is an open-source Python tool simplifying LLM workflow creation and management. [langstream](https://rogeriochaves.github.io/langstream/) reports 417 GitHub stars, 28 forks, and 3 open issues, last pushed Jan 3, 2024. [promptmage](https://promptmage.io) has 115 stars, 9 forks, and 8 open issues, last pushed Oct 21, 2024. Figures are from public GitHub metadata via [langstream's repository](https://github.com/rogeriochaves/langstream) and [promptmage's repository](https://github.com/tsterbak/promptmage). | | [langstream](/tools/rogeriochaves-langstream.md) | [promptmage](/tools/tsterbak-promptmage.md) | | --- | --- | --- | | Tagline | Build robust LLM applications with true composability | Simplifies LLM workflow creation and management | | Stars | 417 | 115 | | Forks | 28 | 9 | | Open issues | 3 | 8 | | Language | Python | Python | | Adopt for | LangStream is a Python-based tool for building robust Language Model (LLM) applications, emphasizing modularity and composability. | Promptmage is an open-source Python tool simplifying LLM workflow creation and management. | | Persona | - | - | | Runtime | - | - | | License | MIT | MIT License, providing flexibility to use, modify, and distribute Promptmage code freely as long as original licensing terms are preserved and acknowledged. | | Categories | Developer Tools, LLM Frameworks | Developer Tools, LLM Frameworks | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [langstream](/tools/rogeriochaves-langstream.md) | [promptmage](/tools/tsterbak-promptmage.md) | | --- | --- | --- | | Days since push | 946d | 649d | | Open issues (now) | 3 | 8 | | Full report | [trust report](/tools/rogeriochaves-langstream/trust.md) | [trust report](/tools/tsterbak-promptmage/trust.md) | ## Shared compatibility - **Python**: [langstream](/tools/rogeriochaves-langstream.md) - Python runtime; [promptmage](/tools/tsterbak-promptmage.md) - Python runtime ## Decision facts: langstream - **Adopt for:** LangStream is a Python-based tool for building robust Language Model (LLM) applications, emphasizing modularity and composability. ## Decision facts: promptmage - **Requirements:** Requires Docker - **Adopt for:** Promptmage is an open-source Python tool simplifying LLM workflow creation and management. - **License detail:** MIT License, providing flexibility to use, modify, and distribute Promptmage code freely as long as original licensing terms are preserved and acknowledged. ## Choose when ### Choose langstream if… - Tags unique to langstream: composability, modular development, python. - LangStream is a Python-based tool for building robust Language Model (LLM) applications, emphasizing modularity and composability. - More GitHub stars (417 vs 115) - visibility, not fit. ### Choose promptmage if… - Requirements: Requires Docker. - Tags unique to promptmage: ai, llm, nlp-library, nlp-machine-learning. - When you require a streamlined process for crafting and overseeing large language model workflows specifically with Python. ## When NOT to use langstream - Last GitHub push was 965 days ago (dormant maintenance, Jan 3, 2024). Validate activity before betting a new project on langstream. - Developer Tools: A gateway is overkill when you're pinned to a single provider and model. - LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. ## When NOT to use promptmage - If your preferred programming environment is not Python or does not support the same level of workflow automation offered by this tool. - When there is a need for a more bespoke solution that cannot leverage the pre-defined structures and capabilities of Promptmage's framework. ## Common questions ### What is the difference between langstream and promptmage? langstream: Build robust LLM applications with true composability. promptmage: Simplifies LLM workflow creation and management. See the comparison table for live GitHub stats and shared categories. ### When should I choose langstream over promptmage? Choose langstream over promptmage when Tags unique to langstream: composability, modular development, python; LangStream is a Python-based tool for building robust Language Model (LLM) applications, emphasizing modularity and composability; More GitHub stars (417 vs 115) - visibility, not fit. ### When should I choose promptmage over langstream? Choose promptmage over langstream when Requirements: Requires Docker; Tags unique to promptmage: ai, llm, nlp-library, nlp-machine-learning; When you require a streamlined process for crafting and overseeing large language model workflows specifically with Python. ### When should I avoid langstream? Last GitHub push was 965 days ago (dormant maintenance, Jan 3, 2024). Validate activity before betting a new project on langstream. Developer Tools: A gateway is overkill when you're pinned to a single provider and model. LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. ### When should I avoid promptmage? If your preferred programming environment is not Python or does not support the same level of workflow automation offered by this tool. When there is a need for a more bespoke solution that cannot leverage the pre-defined structures and capabilities of Promptmage's framework. ### Is langstream or promptmage more popular on GitHub? langstream has more GitHub stars (417 vs 115). Stars measure visibility, not whether either tool fits your constraints. ### Are langstream and promptmage open source? Yes - both are open-source projects on GitHub (langstream: MIT, promptmage: MIT). ### Where can I find alternatives to langstream or promptmage? GraphCanon lists graph-backed alternatives at [langstream alternatives](/tools/rogeriochaves-langstream/alternatives) and [promptmage alternatives](/tools/tsterbak-promptmage/alternatives) ([langstream markdown twin](/tools/rogeriochaves-langstream/alternatives.md), [promptmage markdown twin](/tools/tsterbak-promptmage/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/rogeriochaves-langstream-vs-tsterbak-promptmage.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, langstream or promptmage? langstream: Dormant. promptmage: Dormant. 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 langstream and promptmage? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [langstream trust report](/tools/rogeriochaves-langstream/trust); [promptmage trust report](/tools/tsterbak-promptmage/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=rogeriochaves-langstream`](/api/graphcanon/graph?tool=rogeriochaves-langstream) - 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/_