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Promptfix

promptfix.online

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What it does

PromptFix is a web-based AI prompt engineering platform that scores prompts for reliability, identifies improvements, supports prompt versioning and comparison across models, and provides templates, reverse prompting, team collaboration, and API access.

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Two ratings

SiteList review score

PromptFix is clear and highly usable for developers. Slow loading, crowded plan comparisons, and missing review disclosures need fixing.

13 dimensions

Reviewed on Aug 31, 2026

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Screenshots

Captured during our latest review on Aug 31, 2026

Home · www.promptfix.online
Pricing · www.promptfix.online
Blog · www.promptfix.online
Blog · promptfix.online

Pricing details

Monthly plans: Starter $9/mo and Pro $29/mo; Free plan is $0/mo; Enterprise pricing is custom. Billed monthly. free plan · Free plan with 15 analyses per month and 25 templates.

PlanPriceDetails
Free$0 monthly

For individuals getting started with prompt engineering. 15 prompt analyses per month · 25 free templates · Basic tutorials · Community support

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Starter$9 monthly

For regular prompt engineers. 100 prompt analyses per month · All 300+ templates · Compare up to 3 models · 10 custom templates · Email support

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Pro$29 monthly

For power users and professionals. Unlimited prompt analyses · All 300+ templates · Compare up to 6 models · Reverse Prompt · Unlimited custom templates · API access · Priority support

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Enterprisecustom

For teams and organizations; custom pricing. Everything in Pro · Unlimited team members · SSO & SAML · Custom integrations · Dedicated account manager · SLA guarantee

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Key features

  • Reliability scoring

    Prompt analysis

    Scores prompts from 0 to 100 for output reliability, hallucination risk, and constraint coverage.

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  • Analyze and fix

    Prompt analysis

    Provides AI-powered prompt improvements, actionable fixes, and optimized variants.

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  • A/B testing

    Testing

    Compares prompt variants side by side.

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  • Preference profiles

    Personalization

    Stores tone, brand rules, and always-include settings per project.

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  • Prompt versioning

    Prompt management

    Saves versions, compares scores over time, and keeps the best-performing prompts.

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  • Team collaboration

    Collaboration

    Allows prompts and profiles to be shared with a team.

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  • REST API

    Developer tools

    Provides programmatic access with API key authentication.

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  • Chrome Extension

    Browser tools

    Improves prompts directly in ChatGPT, Claude, Gemini, and Perplexity.

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  • Prompt templates

    Templates

    Provides more than 300 pre-built prompts, with 25 available to start for free.

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  • Reverse Prompt

    Prompt engineering

    Generates prompts from uploaded images.

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  • Model comparison

    Testing

    Compares GPT, Claude, and other model outputs with auto-scoring.

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Who it’s for

  • Writing

    Prompt templates are offered for writing workflows.

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  • Coding

    Prompt templates are offered for coding workflows.

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  • Prompt optimization

    Users can score prompts, receive fixes, and compare optimized variants.

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  • Recreating visual concepts

    Users can upload images to generate prompts that recreate visual concepts.

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Integrations

  • ChatGPT

    AI models

    The Chrome Extension improves prompts in ChatGPT.

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  • Claude

    AI models

    The Chrome Extension improves prompts in Claude.

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  • Gemini

    AI models

    The platform and Chrome Extension support Gemini.

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  • Perplexity

    AI models

    The Chrome Extension improves prompts in Perplexity.

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Buyer questions

Questions buyers actually ask

Who is PromptFix for?

PromptFix is built for prompt engineers and developers managing multiple LLMs, with technical copy, Starter and Pro pricing tiers, and content comparing ChatGPT, Claude, and Gemini.

How much does PromptFix cost?

PromptFix uses a freemium model, with listed pricing from 9 to 29 USD.

What is PromptFix's biggest weakness?

Performance is the clearest weakness: the homepage's main content loads in 3.9 seconds on mobile.

Is PromptFix easy to use?

The review scores usability at 92/100 and describes the experience as highly usable and intuitive, with clear navigation and logical paths.

What should PromptFix fix first?

Improve the oversized hero image and loading path, simplify the pricing comparison, and add clear affiliate disclosure and methodology blocks to review content.

Answers are based on SiteList's latest evidence review. Read the full review.

The expert review

PromptFix earns 72/100 for a highly usable, well-designed experience aimed at prompt engineers and developers. Its biggest weaknesses are slow mobile performance, thin decision support, and missing review-content disclosures and methodology.

72/100: strong product foundation, several fixable trust and conversion gaps

Read all 13 dimensions

Verified user reviews

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Reviews are from the SiteList community. Some reviewers received incentives — disclosed in the review, always. The verdict is never for sale.

Scores across 13 dimensions

Brand & experience

Performance

Content & editorial

Trust & decision surfaces

Search & discoverability

Docs & measurement

Domain
promptfix.online
Pricing
Freemium · $9–$29/mo
Platforms
web, ios, android
Last checked
Aug 31, 2026
Public dimensions
13