Langfa.st
Language learning made effortless.
- Category
- Prompt Library & Engineering
- Pricing
- Paid
- Alternatives
- 6 similar tools
- Last updated
- 1 weeks ago
- Source
- Official site ↗
AI Collection Top Picks
Prompt Library & Engineering Category Picks
About Langfa.st
Langfa offers a unique platform for learning new languages with personalized features and adaptive learning paths.
Langfa.st's Pricing Plans
Langfa.st may change prices at any time. Here's our latest information:
Pro
One-time payment. No subscription
$60
- 50,000 extra requests included then $20 per 20,000 requests
- Full access to evaluations, workflows, and more coming soon
- Instant access to 50+ LLMs skip the setup — no API keys required
- Logs and history never expire
- Collaborate with your team members
- Ad-free
What you get
Additional Information
What is Langfa.st?
Langfa.st is a prompt testing and evaluation platform designed for teams building AI-powered products. It helps developers and product teams iterate faster, catch regressions, and ensure reliable AI behavior.
Features
- Prompt versioning with Git-style history and collaboration
- Structured testing for JSON/HTML outputs with schema validation
- Custom test cases with auto-scoring and diff comparisons
- Live feedback collection and review system
- Cost tracking and prompt performance analytics
- Integration with OpenAI and local LLMs
- Secure workspace with team-based roles and permissions
Use Cases
- Testing and improving prompts for production-ready AI features
- Comparing LLM outputs across model versions and edge cases
- Building prompt evaluation pipelines for product QA
- Sharing prompt snapshots with stakeholders for async review
- Conducting regression tests on complex AI workflows
Frequently asked questions
What is Langfa.st used for?
Language learning made effortless.Is Langfa.st free?
Langfa.st is a paid product. See the Pricing section for current plans.What are alternatives to Langfa.st?
Top alternatives to Langfa.st include PromptPal, Promptmakr, Promptomania, Deploy Prompt, PromptExplained.Where can I get Langfa.st?
Langfa.st is available at https://langfa.st/.What category is Langfa.st in?
Langfa.st is listed in Prompt Library & Engineering.
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