Your prompt engineering stack starts here

From hobbyists to high-scale teams — pick what fits your workflow.

Monthly
Annual Save 25%

FREE

$0 /month

For occasional prompt engineers exploring ideas.

Includes

  • Unlimited prompts & revisions
    Build, tweak, and optimize your prompts with AI — no cap.
  • Unlimited evaluations
    Define test cases and run prompt evaluations at scale.
  • Non-premium AI models
    Access a curated set of commonly-used, cost-effective models.
  • Managed API access (pay-as-you-go)
    Use our hosted API keys — just load credits and go.
  • $5 welcome credits
    Try evaluations without adding payment details.
  • Low queue priority
    Evaluations are processed with standard priority.
  • Basic support
    Get help with basic questions and troubleshooting.
Billed monthly

PRO

$16 /month

For professionals who deal with prompt engineering daily

Everything in FREE, plus

  • Premium AI models
    Full access to the latest and most powerful LLMs.
  • Use your own API keys
    Bring your OpenAI/Anthropic/Google/xAI keys — no extra fees from us.
  • Privacy mode
    Store all data locally with your IDE. Cloud is optional.
  • High queue priority
    Faster evaluation runs when you need results now.
  • Priority support
    Faster, developer-first assistance.

ENTERPRISE

Custom

For teams and orgs building LLM-powered apps at scale.

Everything in PRO, plus

  • Custom pricing & licensing
    Volume discounts and tailored packages for large teams.
  • Team-wide privacy controls
    Enforce privacy mode across all users.
  • Top queue priority
    Evaluations jump to the front of the line.
  • Premium support
    Priority access, code-level help, and integration assistance.

FAQs

Understand better how pricing and features work.

Promposer works in your browser and via our VS Code extension. Any VSIX-compatible IDE such as Visual Studio Code, Cursor, Windsurf, Trae, VSCodium, etc. is supported. You can compose, improve, and evaluate prompts in the app; the extension lets you do the same from your editor.
PRO is a subscription billed monthly (or annually with savings). You can also add funds (credits) for managed API access (pay-as-you-go). With credits, we run evaluations using our hosted API keys and deduct the usage cost. PRO/ENTERPRISE can use their own API keys with no extra platform fees.
In PRIVACY mode, prompt/evaluation content stays only on your machine; our servers process evaluations in real time without storing your content. We never sample content from PRO or ENTERPRISE accounts.
Managed API Access lets you run evaluations using our hosted vendor API keys. You pre-load credits, then pay-as-you-go based on model usage. No setup needed. Alternatively, bring your own vendor keys (PRO/ENTERPRISE) and pay the vendor directly with no Promposer surcharge.
Yes. You can create unlimited prompts, revisions, and evaluations. Running evaluations may incur model/API costs (via your credits or your own keys). Fair-use and rate limits apply; queue priority depends on your plan (FREE standard, PRO higher, ENTERPRISE highest).
You can reach out here. We would love to hear from you!