Nicolas Grenié

Basalt - Integrate AI in your product in seconds

Basalt is the platform to build and operate AI features : Craft high-quality prompts with our AI-powered Copilot, test and evaluate LLM outputs, deploy seamlessly with our SDK, monitor and refine performance in real conditions—all in a collaborative workflow.

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Nicolas Grenié

Are you building an AI feature in your product? Tell me:
How do you keep track of the prompts that are working and the ones that don't?
How do you compare which models work better for you?

Until now I feel a lot of us would answer: a google sheet, or a notion page shared with the team 🤦‍♂️
But if you are serious about adding AI to your product, you can't just leave it to manual work.

That's why @Basalt is the perfect tool for engineering and product teams you get to iterate on the wording of each prompt, you get test your prompts as the models eveolve.
At the end it gives you a dashboard to see performances. not anecdotal feedback.

The same way you would not write software without proper testing, you should not build AI feature without proper tooling.

Good job team 👏

Matthieu Vaxelaire

@picsoung Thanks for spotting and supporting @Basalt Nicolas !

Quentin Le Gall

@picsoung thank you for your full support @picsoung !

Guillaume Marquis

@picsoung Thanks for your support, you're the best✌!!

Francois de Fitte

@picsoung Thanks for the support !!

@picsoung Amazing work—this is something AI-driven teams really need :)

Guillaume Marquis

Hey Product Hunt! 👋

I’m Guillaume, co-founder & CTO of @Basalt , and I couldn’t be more excited to share what we’ve built with you today. 🚀


Why we built Basalt

Building AI features shouldn’t take months—but for many teams, it does. When working with LLMs, we faced the same frustrating loop:

❌ Manually tweaking prompts with no structured way to iterate

❌ Evaluating AI outputs based on “gut feeling” instead of real-world data

❌ Struggling to ship AI features that actually perform in production

We knew there had to be a better way. That’s why we built Basalt: an AI-native platform designed to help teams go from idea to production in seconds, not months.

How Basalt works


With Basalt, you can:


🛠 Craft best-in-class prompts with Basalt Copilot to help you write and improve them

Test & Evaluate LLM outputs using real-world datasets and structured grading

🚀 Deploy AI features directly into your product with our SDK

📊 Monitor performance with automated tracking and insights

💡 Collaborate with your team throughout the entire AI feature development journey

Special Offer for Product Hunt 🚀

We are giving out 1k free runs for our PH launch. It’s way enough for you to test how powerful Basalt is.

We’d love your feedback!

This is just the beginning, and we’re here to learn. Try Basalt, let us know what you think, and tell us what AI feature challenges you’re facing!

Thanks, Product Hunt! 🙌

Matthieu Vaxelaire

@guillaume_marquis3 Congrats for the solution you have built ! AI on your product in minutes, not month 💘

Quentin Le Gall

@guillaume_marquis3 Have fun un San Francisco Basalt team!! It is just the beginning!

Théophile Cousin

@guillaume_marquis3 We won't stop shipping !

Guillaume Marquis

@john_tans Thank you john!

Vianney de Drouas

Probably the best product in the area right now

Francois de Fitte

@vianney2d 👌💪

Guillaume Marquis

@vianney2d Thanks so much Vianney 🙌 happy to have you onboard!

Edouard Uguen

A game changer in supporting our AI internal projects!

Guillaume Marquis

@edouard_uguen1 Thank you Edouard 💪

Francois de Fitte

@edouard_uguen1 thanks so much !

Matthieu Vaxelaire

@edouard_uguen1 Thanks Edouard ! Great collaborationg with you !

Valentin Chrétien

Amazing product from an incredible team—happy launch day, and all the best!

(I still remember the late-night demo over a beer, really impressed by the vision and execution)

Guillaume Marquis

@valentinchrt Thanks for your support Valentin! Can't wait to see you again 🔥

Francois de Fitte

@valentinchrt thanks so much for the support !

Victor Gross

@valentinchrt @guillaume_marquis3 c'était top de t'avoir Valentin, le produit continue à évoluer fort 💪

Xenia

Hey Guillaume,

This is awesome! Basalt sounds like a game-changer for AI development. The ability to streamline prompt creation, testing, and deployment in one platform is exactly what teams need. Can't wait to try it out and see how it transforms our workflow. Great work! 🚀

Guillaume Marquis

@xenia1234 Thanks so much Xenia for your support 🪨

Francois de Fitte

@xenia1234 Thanks so much ! Hope you enjoy using Basalt

Thomas Tabouelle

@xenia1234 Thank you Xenia, good luck with your launch !

Nathan Thomassin

That's really useful! I was able to come up with and refine over 20 AI agent prompts in just a few days. Plus, their LLM as a judge feature during the validation phase is fantastic. Definitely worth trying out, if you ask me. Keep it up @Basalt!

Guillaume Marquis

@nathan_thomassin Thank you Nathan for your support! You're definitely a big @Basalt user! It's a pleasure to have you on board 🔥

Francois de Fitte

@nathan_thomassin thanks so much for the support, glad you love it !

Victoria Dalleau

Congrats for the launch -- need to try this! 👀

Guillaume Marquis

@victoriadalleau Thank you Victoria! 🙌

Francois de Fitte

@victoriadalleau please do !! :)

Francois de Fitte

@victoriadalleau thanks so much !

Thomas Tabouelle

@victoriadalleau hope you liked it !

Cyril Codron

Basalt helps us at @Prismy monitor the efficiency of our translation prompts—an absolute game changer! Being able to track prompt performance, replay them, and seamlessly publish improvements makes a huge difference. Congrats on the launch! 🚀

Guillaume Marquis

@cyrilcodron We're delighted to help you integrate high-quality AI into your product @Prismy 💪 Thanks for your support Cyril!

Francois de Fitte

@cyrilcodron thanks for using Basalt !

Thomas Tabouelle

@cyrilcodron thanks glad you love the product

Camille Franceschi

Amazing product for PMs !! 🚀

Victor Gross

@camille_franceschi1 thanks Camille for the support ! Please spread across product people !

Guillaume Marquis

@camille_franceschi1 Thank you Camille for your support 🙌

Francois de Fitte

@camille_franceschi1 thanks for your support !

Thomas Tabouelle

@camille_franceschi1 even for developers !! 🤩

Michael Vavilov

Wow! This is so actual! Congratulations on the launch!


Btw, "Terms of service" button does not work.

Victor Gross

@michael_vavilov thx for raising the point ! we will fix the link asap !

Guillaume Marquis

@michael_vavilov Thanks for your support and your feedback! 🙏

Edith Christian

Does it offer any built-in ways to detect and adapt to model drift?

Victor Gross

@edith_christian it is doable by tracking the evolution of score over time across prompt versions, yet we will go further in the coming weeks about ensuring quality remains great !

Guillaume Marquis

@edith_christian @vicgrss as Victor said, you can easily monitor you production to anticipate and detect model drifts :)

Henri de Bouteiller

We use it a lot at Newtone, our entire agent base is managed in Basalt ! We love it, good work team.

Guillaume Marquis

@henri_de_bouteiller1 Definitely a really good use case you are building on it! Let's go 🚀

Francois de Fitte

@henri_de_bouteiller1 amazing, thanks so much !

Thomas Tabouelle

@henri_de_bouteiller1 thanks for using the product

Bon

It's great to meet you, Basalt! Thanks to PH for the introduction.


I must say, I'm really impressed by your personal presentation(landing page 🤣) - it's truly captivating! However, I'm still trying to clearly understand what you do. Would you mind sharing an example of how you typically help people? It would really help me understand your unique talents better.

Victor Gross

@bonvisions thanks for your comment ! Have you already integrated AI into your product ?
If so, you shall understand what problems we are tackling ! Craft great AI features is hard .. !

If you want we can jump on a call together ! my email : victor@hexa.com

Guillaume Marquis

@bonvisions Thank you for your support and your feedback that is truly insightful :)

Hugo B.

very cool product

Victor Gross

@hugo_b_ thanks Hugo for the Nice feedback ! Please share that we are on PH around you ;)

Francois de Fitte

@hugo_b_ thanks so much !

Guillaume Marquis

@hugo_b_ Thank you for your support Hugo!

Jun Shen

As a former Amazon SDE, I'm impressed with Basalt's approach to AI integration. The Copilot feature reminds me of challenges we faced streamlining ML workflows. Awesome product 👍

Francois de Fitte

@shenjun thanks so much for you feedback and support on this project. Don't hesitate to create a free account and check it out !

Guillaume Marquis

@shenjun Thank you for your support!

Kenan

Hmm good👍🏻

Guillaume Marquis

@thekenan Thanks 🙌

Alice Le
Launching soon!

Great product idea! As someone building AI features, I can relate to the struggle of managing prompts and comparing models effectively. A few questions:

  1. How does Basalt handle version control for prompts? Is there a way to track changes over time?

  2. Can you integrate Basalt with existing development workflows or CI/CD pipelines?

  3. Does the dashboard provide insights on cost optimization across different models?

It's exciting to see a tool that brings software engineering best practices to AI development!

Victor Gross

@alice_le Thanks Alice for your comment and questions

1/ we have great version control system with both minor and major versions plus an experience of auto-versioning : you keep a state of flow when prompt / iterating without having to focus on versioning, everything is saved, nothing is lost !

2/ of course, we have a monitoring matching market practices with prompts and traces. Have a look at our documentation

3/ we don't add cost for the moment, but will sure do soon ! Sign-up to receive our product news :)

Winrey Ma
The collaborative prompt testing workflow looks helpful for our team. Monitoring LLM performance in real conditions would solve some of our current deployment issues.
Guillaume Marquis

@winrey Thanks for your feedback!

Nic Touron

I am about to release my new AI-native product - and ofc I used Basalt to :
- Craft prompts using best-practices
- Ensure the quality is good with 100+ test cases (without the grunt work, using custom & LLM-as-a-judge evaluators)
- Figure out which models / parameters are best
- Deploy in 30 sc in my codebase using the SDK
- Monitor logs once in staging / production

It's such a great toolkit to build AI features!!

Victor Gross

@nic_trn thx Nic for contributing to crafting such a great product and experience for our users !