LangFastLangfa.st
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PortkeyPortkey.ai
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Related Products
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About
LangFast is a lightweight prompt testing platform designed for product teams, prompt engineers, and developers working with LLMs. It offers instant access to a customizable prompt playground—no signup required. Users can build, test, and share prompt templates using Jinja2 syntax with real-time raw outputs directly from the LLM, without any API abstractions.
LangFast eliminates the friction of manual testing by letting teams validate prompts, iterate faster, and collaborate more effectively. Built by a team with experience scaling AI SaaS to 15M+ users, LangFast gives you full control over the prompt development process—while keeping costs predictable through a simple pay-as-you-go model.
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About
Launch production-ready apps with the LMOps stack for monitoring, model management, and more. Replace your OpenAI or other provider APIs with the Portkey endpoint.
Manage prompts, engines, parameters, and versions in Portkey. Switch, test, and upgrade models with confidence!
View your app performance & user level aggregate metics to optimise usage and API costs
Keep your user data secure from attacks and inadvertent exposure. Get proactive alerts when things go bad.
A/B test your models in the real world and deploy the best performers.
We built apps on top of LLM APIs for the past 2 and a half years and realised that while building a PoC took a weekend, taking it to production & managing it was a pain!
We're building Portkey to help you succeed in deploying large language models APIs in your applications.
Regardless of you trying Portkey, we're always happy to help!
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Audience
Product teams, software engineers, prompt engineers, AI developers, ML researchers, startup founders, and technical writers working on AI-powered features or language model integrations.
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Audience
Developers that want to ship ambitious generative AI applications
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Support
Phone Support
24/7 Live Support
Online
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Support
Phone Support
24/7 Live Support
Online
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API
Offers API
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API
Offers API
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Screenshots and VideosNo images available
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Screenshots and Videos |
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Pricing
$60 one time
Free Version
Free Trial
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Pricing
$49 per month
Free Version
Free Trial
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Reviews/
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Reviews/
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Training
Documentation
Webinars
Live Online
In Person
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Training
Documentation
Webinars
Live Online
In Person
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Company InformationLangfa.st
Founded: 2025
United States
langfa.st/new
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Company InformationPortkey.ai
Founded: 2023
portkey.ai/
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Categories |
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Integrations
Amazon Bedrock
Azure OpenAI Service
Claude
Groq
Mixtral 8x7B
NGINX
OpenAI
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Integrations
Amazon Bedrock
Azure OpenAI Service
Claude
Groq
Mixtral 8x7B
NGINX
OpenAI
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