Is Promptmetheus free to use?

Yes. Promptmetheus has a free plan — Free tier available; paid plans listed on site

Does Promptmetheus have memory?

No persistent memory — sessions don't carry over by default.

What are the best alternatives to Promptmetheus?

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Promptmetheus Review

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Promptmetheus is a prompt engineering IDE for composing, testing, and optimizing prompts across 150+ LLMs with versioning and automated evaluation.

General-Purpose Assistants

Verdict

Promptmetheus occupies the prompt-engineering tooling niche alongside platforms like PromptLayer and Helicone, standing out with broad model support (150+ LLMs across 15 APIs) and a desktop-grade IDE experience. Its automatic evaluation and versioning features make it genuinely useful for developers iterating on production prompts. The main tradeoff is that it requires a large screen and is firmly developer-focused, with limited appeal for non-technical users.

What it does

Compose, test, and optimize prompts for your LLM-powered applications, agents, and workflows. Supports 100+ models, prompt versioning, automatic evaluations, and more.

Best for

Developers and teams working on LLM-powered applications and workflows.

At a glance

Free planYes

Login requiredYes

MemoryNo

VoiceNo

Image generationNo

Group chatNo

Mobile appNo

NSFW policyVaries by model

PricingFree + paid — Free tier available; paid plans listed on site

Pros & cons

Pros

Supports 150+ LLMs across 15 APIs
Prompt versioning and automated evaluations
Collaboration features for teams
Bring-your-own API key option

Cons

Requires 12"+ screen; not mobile-friendly
Developer-focused; steep learning curve for non-technical users
No standalone model hosting

Related tools

Frequently asked

Is Promptmetheus free to use?: Yes. Promptmetheus has a free plan — Free tier available; paid plans listed on site
Does Promptmetheus have memory?: No persistent memory — sessions don't carry over by default.
Can Promptmetheus do voice or images?: Voice: no. Image generation: no.
What are the best alternatives to Promptmetheus?: Browse the AI Tools Directory for related tools.

Looking for an alternative?

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Notes from users

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