👋 Hi Product Hunters! I’m Petr, co-founder and CEO of Langtail. Over the past year, I’ve spoken with dozens of founders and engineers about their experiences building AI-powered apps. I heard from almost everyone that taking an app from a simple demo to a great product that can be shipped to users is HARD WORK. Some of the common challenges I heard: - LLMs can be unpredictable, making traditional testing tools more frustrating than helpful. - Writing a good prompt is an art form, and sometimes the best person for the job isn’t an engineer - which is a problem if all of the prompts live in git. - The best practices for using LLMs are constantly changing as new models are released and as teams get more experience. We built Langtail to address the pain points that a team experiences as they take their proof-of-concept and turn it into a real product. Here are the top features in Langtail: 🧪 **Playground:** Debug and collaborate on prompts with your team. ✔️ **Tests:** Create a suite of tests to evaluate how changes affect your prompt’s output. 🚀 **Deployments:** Publish prompts as API endpoints, allowing you to easily invoke them from your app. 📊 **Observability:** Logs provide insight into how your prompt is responding to real-world users and metrics help you monitor key metrics like latency and cost. If you give Langtail a try today, use the promo code PH50 for 50% off for life. You can claim it in the Billing section. If you have any thoughts about your first few minutes poking around the platform, drop them as a comment here and me or someone else on the team will respond!

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! 💜

Hey! I’m Tomas, co-founder and CTO of Langtail. I’m keen to hear about your first impression of Langtail! Could you take a minute to click around our website and then come back here and reply to this comment answering these two questions? - What's one thing you’re hoping that Langtail can do for you? - Are there any features that you expected but seem to be missing? Many thanks for your help and support on our launch!

👋 Hey, I've tried your platform a few times now, and wow, the UX is outstanding! The effort that went into the tool you launched today is incredible - great job, @petrbrzek @rychlis and the Langtail team!  What’s in the pipeline for the future? Any chance you’ll support hot new open-source models like Llama3? Also, super keen to see if there's a plan for a self-hosted/on-premise gateway option. Thanks, and good luck on your journey! 🚀

Prompt management and iteration is becoming more and more important. At my old job we used a CMS to keep track of our prompts and it didn't really do the trick. Putting them in code is equally lackluster. I'm excited to see what the experience is with this!

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.

Ever since I have known @petrbrzek, he and his team has always built tools you want to use - attention to detail is their brand. And current state of LLMs can really use a debugging & testing workbench :).

Awesome solution to a constant problem in AI! It's really nice to see something that directly owns the problems with LLMs and then provides a way for that problem to be solved! Excellent work 👏👏👏

Nice job guys! Hearing great things about Langtail from the team at Ceros! Good luck with everything post launch!

Just yesterday I recommended Langtail to a friend who is starting to build with LLMs. I think it's the best choice out there to start with a simple prototype and move to production.

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!

A much-needed playground before the production. Best of luck with your launch! Congratulations.

The team behind this is incredible and has great passion for making the UX be best-in-class. They are also extremely focused on solving real problems by providing the tools for people to ship things with confidence. Also, they are laser focused not just on the easy parts, but also on the long-term evolution of your applications. I had the chance to see an early version and it was already incredible back then and they only improved it over time.

Cool! Does this use Langchain under the hood? I wonder how OpenAI's Assistant API compares to your offering.

Been using Langtail for a while, and it has made working with our clients a breeze

Exciting! Let's go!

We are always looking for better tools and process improvements. I'm looking forward to what our AI dept. can do with it!

Petr Brzek has very well though product, that target weaknesses of current development and testing processes using LLM. And of course - Petr and his team are well know for attention to details.

Congrats on the launch 🎉and as someone who's into AI app development this was an incredible product. Keep up the great work!💪

Top product and team! The jingle helps too 😂