Comparison
promptflow vs langstream
Verdict
Pick promptflow if promptflow is a development framework catered towards creating LLM applications through all stages of development, including initial prototyping and ongoing monitoring; pick langstream if langStream is a Python-based tool for building robust Language Model (LLM) applications, emphasizing modularity and composability.
Markdown twin · promptflow alternatives · langstream alternatives
GraphCanon updated 2w
vs
Trust & integrity
| Signal | promptflow | langstream |
|---|---|---|
| Maintenance | Active (17d since push) As of 3w · github_public_v1 | Dormant (946d since push) As of 2w · github_public_v1 |
| Provenance | Not a fork · Organization account As of 3w · github_public_v1 | Not a fork · Personal account As of 2w · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of 1mo · osv@v1 | No lockfile (source not queried) As of 1mo · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- promptflow
- Build high-quality LLM apps from prototyping to production deployment and monitoring
- langstream
- Build robust LLM applications with true composability
Stars
- promptflow
- 11k
- langstream
- 417
Forks
- promptflow
- 1.1k
- langstream
- 28
Open issues
- promptflow
- 72
- langstream
- 3
Language
- promptflow
- Python
- langstream
- Python
Adopt for
- promptflow
- Promptflow is a development framework catered towards creating LLM applications through all stages of development, including initial prototyping and ongoing monitoring.
- langstream
- LangStream is a Python-based tool for building robust Language Model (LLM) applications, emphasizing modularity and composability.
Persona
- promptflow
- -
- langstream
- -
Runtime
- promptflow
- -
- langstream
- -
License
- promptflow
- MIT
- langstream
- MIT
Last pushed
- promptflow
- Jul 9, 2026
- langstream
- Jan 3, 2024
Categories
- promptflow
- Developer Tools, LLM Frameworks
- langstream
- Developer Tools, LLM Frameworks
Trust and health
Maintenance
- promptflow
- Active (82%)
- langstream
- Dormant (18%)
Days since push
- promptflow
- 17d
- langstream
- 946d
Open issues (now)
- promptflow
- 72
- langstream
- 3
Owner type
- promptflow
- Organization
- langstream
- User
Full report
- promptflow
- Trust report
- langstream
- Trust report
Shared compatibility
- Python · promptflow: Python runtime · langstream: Python runtime
Choose promptflow if…
- Tags unique to promptflow: ai-application-development, chatgpt, llm, prompt-engineering.
- When you require a comprehensive environment to manage the full lifecycle of LLM applications from ideation to deployment in Python.
- More GitHub stars (11k vs 417) - visibility, not fit.
When NOT to use promptflow
- If your team prefers or requires tools that support languages other than Python, as Promptflow is exclusively focused on the Python ecosystem.
- In cases where a more fragmented toolset with specialized components for different development stages might be preferable to an integrated framework approach.
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.
- Leaner open-issue backlog (3).
When NOT to use langstream
- Last GitHub push was 962 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.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (microsoft/promptflow) · observed Jul 27, 2026
- GitHub forks (microsoft/promptflow) · observed Jul 27, 2026
- Last push (microsoft/promptflow) · observed Jul 9, 2026
- License file (MIT) · observed Jul 27, 2026
- Decision facts (enrichment) · observed Jul 16, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (rogeriochaves/langstream) · observed Aug 7, 2026
- GitHub forks (rogeriochaves/langstream) · observed Aug 7, 2026
- Last push (rogeriochaves/langstream) · observed Jan 3, 2024
- License file (MIT) · observed Aug 7, 2026
- Decision facts (enrichment) · observed Jul 12, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: promptflow 11k · langstream 417 (synced Jul 27, 2026).
Common questions
- What is the difference between promptflow and langstream?
- promptflow: Build high-quality LLM apps from prototyping to production deployment and monitoring. langstream: Build robust LLM applications with true composability. See the comparison table for live GitHub stats and shared categories.
- When should I choose promptflow over langstream?
- Choose promptflow over langstream when Tags unique to promptflow: ai-application-development, chatgpt, llm, prompt-engineering; When you require a comprehensive environment to manage the full lifecycle of LLM applications from ideation to deployment in Python; More GitHub stars (11k vs 417) - visibility, not fit.
- When should I choose langstream over promptflow?
- Choose langstream over promptflow 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; Leaner open-issue backlog (3).
- When should I avoid promptflow?
- If your team prefers or requires tools that support languages other than Python, as Promptflow is exclusively focused on the Python ecosystem. In cases where a more fragmented toolset with specialized components for different development stages might be preferable to an integrated framework approach.
- When should I avoid langstream?
- Last GitHub push was 962 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.
- Is promptflow or langstream more popular on GitHub?
- promptflow has more GitHub stars (11,193 vs 417). Stars measure visibility, not whether either tool fits your constraints.
- Are promptflow and langstream open source?
- Yes - both are open-source projects on GitHub (promptflow: MIT, langstream: MIT).
- Where can I find alternatives to promptflow or langstream?
- GraphCanon lists graph-backed alternatives at promptflow alternatives and langstream alternatives (promptflow markdown twin, langstream markdown twin), 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 mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, promptflow or langstream?
- promptflow: Active. langstream: 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 promptflow and langstream?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: promptflow trust report; langstream trust report.