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    Prompt Engineering / LLM Ops
    Freemium
    Free Trial
    Sponsored

    PromptFix

    Prompt Engineering / LLM Ops

    PromptFix is an AI output reliability platform that scores, fixes, versions, and A/B tests prompts for models like GPT, Claude, and Gemini. It targets creators and teams who need consistent, lower-hallucination prompts rather than one-off chat rewrites.

    Alternatives & similar tools

    Related picks from editorial notes.

    Also mentioned

    • PromptLayer / Helicone (observability-heavy stacks)
    • LangSmith prompt hubs
    • Manual eval in playgrounds

    Features & details

    Full overview from our catalog (read-only reference).

    Category (short)
    Prompt Engineering / LLM Ops
    Category
    Prompt Engineering / LLM Ops
    Pricing (CSV)
    Free Trial
    Directory pricing
    Freemium
    Sponsored note
    no
    Target audience
    Builders who treat prompts as versioned assets. Not ideal for: users who only want a free local CLI rewriter, or orgs needing on-prem with no cloud scoring.
    Best for
    Builders who treat prompts as versioned assets. Not ideal for: users who only want a free local CLI rewriter, or orgs needing on-prem with no cloud scoring.
    Pricing notes
    Verified August 2026 at https://promptfix.online. Free $0/mo (15 analyses/mo, 25 templates, 1 preference profile). Starter $9/mo (100 analyses, 300+ templates, A/B testing, 3-model comparison). Pro $29/mo (unlimited analyses/profiles, team collab, REST API, reverse prompt, 6-model comparison, priority support). Enterprise custom (SSO/audit path advertised via contact).

    Pros & cons

    Editorial notes to help compare fit before opening the vendor site.

    Pros

    • Clear Free/Starter/Pro ladder with usable free tier
    • Scoring plus fixes, not just rewrite fluff
    • API and Chrome extension for real workflows
    • Multi-model comparison on paid plans

    Cons

    • Free analysis caps are low for daily power use
    • Enterprise details need sales contact
    • Crowded prompt-tool category
    • Reverse prompt and API locked behind Pro

    Review notes

    Context from the listing review and editorial research.

    NEW tool. Disambiguation: this is the SaaS at promptfix.online (and G2 listing). Unrelated: promptfix.dev ($149 human prompt-pack service) and the open-source PyPI/local promptfix coding-agent layer. Prefer promptfix.online for directory listing.

    Extended features

    In-depth description and capability notes.

    Reliability scoring (0-100) with hallucination and constraint signals Analyze-and-fix suggestions plus optimized variants A/B testing and multi-model comparison Preference profiles for tone/brand rules Prompt versioning and template library (300+ on paid) Chrome extension for ChatGPT, Claude, Gemini, Perplexity REST API and team collaboration on Pro Reverse prompt from images (Pro) Games Hub and Certified Professional credential

    Use cases

    Prompt engineers and product teams paste production prompts, get scored fixes, compare models, and ship more reliable LLM behavior into apps or daily workflows.