Debug Prompts With Ease

Quickly iterate, fine-tune settings, and get instant feedback to perfect your prompts in a no-code playground.

Rapid Iteration and Experimentation

Optimize LLM performance

• No-code Playground: Quickly write and execute prompts without any coding required.
• Adjustable Parameters: Fine-tune LLM behavior by adjusting temperature, top_p, and other settings.
• Multiple LLM Models: Experiment with different LLM models to find the best fit.
• Template Variables: Use variables in templates for dynamic prompt generation.
• Advanced Syntax Support: Leverage conditional statements and loops using handlebars syntax.

Seamless Integration and Collaboration

Create, share, and deploy prompts

• Templated Prompts: Create templates with predefined messages and variables for consistency.
• Multi-environment Deployment: Deploy templates and LLM configurations to production, staging, and preview environments.
• Prompt Sharing: Share prompt versions privately or publicly for collaboration.
• Real-life Scenario Debugging: Open prompts from logs in the playground for debugging real-life scenarios.
• Accessible to All: Designed for both developers and non-technical users like marketers.

Function Calling and Version Control

Extend LLM capabilities with Functions

• Function Calling (Tools): Connect LLMs with external APIs using state-of-the-art function calling.
• Prototype Tools: Test and prototype Tools (functions) directly in the playground.
• Magic Function Generation: Automatically generate functions based on requirements with the magic button.
• Prompt Version History: Maintain a comprehensive version history for prompts, enabling easy rollbacks.

Engineering and AI teamsLangtail

“Langtail simplifies the development and testing of Deepnote AI, enabling our team to focus on further integrating AI features into our product”

User Testimonials

“This is already a killer tool for many use-cases we are already using it for. Super excited for the upcoming features and good luck with the launch and further development! 💜”
Jakub Žitný “Been using LangTail for a few months now, highly recommend. It has kept me sane. If you want your LLM apps to behave uncontrollably all the time, don't use LangTail. On the other hand, if you are serious about the product you are building, you know what to do :P Love the product and the team's hard work. Keep up the great work!”
Sudhanshu Gautam “I have used Langtail for prompt refinement, and it was a real timesaver for me. Debugging and refining prompts is sometimes a tedious task, and Langtail makes it so much easier. Good work!”
Martin Staněk “LLM products are creating a flurry of bad experiences in their rush to hit the market quickly. But Petr and his team have been demonstrating since day one just how serious they are about doing this job with outstanding designs. I've been following them for over a year now and I highly recommend them to everyone. I'm certain they're going to reach fantastic places.”
Yiğit Konur “Been using Langtail for a while, and it has made working with our clients a breeze”
Soham Adwani “Unpredictable behavior of LLMs, team collaboration on prompts and robust evaluation were the biggest pains for me when I was building my app. But now it's solved thanks to LangTail. It's a great product.”
Michal Stoklasa

Frequently asked questions

• What is a no-code playground, and how does it help with debugging prompts?
• Can I use different LLM models for debugging prompts?
• How can I integrate external APIs with my prompts?
• Is it possible to roll back to previous versions of my prompts?

Ready to debug your prompts?

Start debugging your prompts for free today.