Microsoft Foundry Prompt Optimizer

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Freedom report

One barScore 5.3

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Microsoft Foundry Prompt Optimizer is ranked #18 of 29 in AI prompt generators on Freedom251. It runs on Web.

Compared on AI prompt generators

Optimization mode: automated

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The record

Purpose: Prompt Optimizer automatically improves an agent’s system instructions using prompt-engineering best practices.
How it works: An LLM uses the supplied instructions and optional suggestions to restructure and clarify the prompt.
Reasoning: It provides an explanation for each modified paragraph that users can review alongside the revised text.
Iteration: Users can add suggestions and reoptimize, using the latest optimized text as the next baseline.
Access: The optimizer is available in the Foundry portal’s agent configuration and in the model playground wherever a system-instructions field is present.
Prerequisites: Use requires a Foundry project with a prompt or workflow agent, a model deployment in a supported region, and access to the agent configuration panel.
Limits: It optimizes text-based agent instructions and does not optimize non-text configuration such as tool definitions or knowledge sources.
Persistence: Optimization results are not stored permanently, and the optimizer does not automatically save previous instruction versions.
Preview status: The feature is in public preview, without a service-level agreement, and Microsoft does not recommend it for production workloads.
Related optimization: The separate Agent Optimizer can generate candidates for prompt-agent instructions, function-calling tool descriptions, or model selection.
Security and privacy: Microsoft states that prompts and completions for Models sold by Azure are not shared with other customers or used by model providers to improve their models or services.
Maker: Microsoft’s corporate headquarters are in Redmond, Washington.
Founded: 1975
Headquarters: Redmond, Washington, United States

Where it ranks on Freedom251

Best AI Prompt Generators in 2026#18 of 29

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Sources

learn.microsoft.com/en-us/azure/foundry/observability/how-t· checked 4 Oct 2026
learn.microsoft.com/en-us/azure/foundry/agents/quickstarts/· checked 4 Oct 2026
learn.microsoft.com/en-us/azure/foundry/responsible-ai/open· checked 4 Oct 2026
news.microsoft.com/uploads/prod/sites/370/2018/11/Microsof· checked 4 Oct 2026