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Average Ratings 0 Ratings

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ease
features
design
support

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Write a Review

Description

LangFast is a streamlined prompt testing platform aimed at product teams, prompt engineers, and developers working with large language models. It offers immediate access to a customizable prompt playground without requiring signup, making prompt experimentation quick and hassle-free. Users can create, test, and share prompt templates using Jinja2 syntax, while receiving real-time raw outputs directly from the LLM, avoiding complicated API layers. This reduces the friction typically associated with manual prompt testing, allowing teams to validate and iterate faster. Developed by a team experienced in scaling AI SaaS products to millions of users, LangFast provides full control over the prompt development lifecycle. The platform also fosters improved team collaboration by enabling easy sharing and iteration. Its pay-as-you-go pricing ensures users only pay for what they use, keeping budgets under control. LangFast is ideal for teams seeking a flexible, cost-effective solution for prompt engineering.

Description

Prompt Genie serves as a supportive AI prompt assistant aimed at helping users of generative AI tools, such as ChatGPT, Claude, and Gemini, to formulate precise, impactful, and contextually rich "Super Prompts" from vague or unrefined ideas. Accessible as both a web platform and a Chrome browser extension, it allows users to input a basic idea, like "create a blog draft on X" or "develop ad copy for product Y," and promptly transforms it into a structured prompt that enhances AI performance. By utilizing various prompt-enhancement algorithms, Prompt Genie enriches the input with clarity, depth, tone, and context, significantly reducing the trial-and-error process often encountered when engaging with AI. In addition to its prompt creation capabilities, the platform features a prompt library, enabling users to save, tag, and organize their preferred prompts for future use, build a personalized prompt archive, and share prompts seamlessly with colleagues or clients to ensure consistency across projects. This functionality not only streamlines the creative process but also fosters collaboration and efficiency in AI-driven tasks.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

No images available

Screenshots View All

Integrations

AI21 Studio No 
Amazon Web Services (AWS) No 
ChatGPT No 
Claude No 
Gemini No 
Google Chrome No 
Grok No 
Llama No 
Meta AI No 
Midjourney No 
Mistral AI No 
Perplexity No 

Integrations

AI21 Studio Yes 
Amazon Web Services (AWS) Yes 
ChatGPT Yes 
Claude Yes 
Gemini Yes 
Google Chrome Yes 
Grok Yes 
Llama Yes 
Meta AI Yes 
Midjourney Yes 
Mistral AI Yes 
Perplexity Yes 

Pricing Details

$60 one time
Free Trial Yes 
Free Version No 

Pricing Details

$8.33 per month
Free Trial No 
Free Version Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support No 

Customer Support

Business Hours Yes 
Live Rep (24/7) Yes 
Online Support Yes 

Types of Training

Training Docs No 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Langfa.st

Founded

2025

Country

United States

Website

langfa.st/new

Vendor Details

Company Name

Prompt Genie

Country

Canada

Website

www.prompt-genie.com

Product Features

Product Features

Alternatives

Alternatives