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Basalt: AI Agent Building and Evaluation Platform
Basalt is a comprehensive end-to-end platform designed for building, evaluating, monitoring, and improving AI agents. The platform helps teams create trustworthy AI features by providing tools for prompt engineering, testing, and deployment, enabling organizations to ship AI agents that users can rely on.Description Rewrite
Basalt is an end-to-end platform that empowers teams to build, evaluate, monitor, and improve AI agents. The platform offers a no-code playground for prompt engineering with AI-powered guidance, comprehensive testing tools with evaluators and test case generation, seamless deployment via SDK, and production monitoring capabilities-all designed to help organizations create AI features that users can trust.Deep Service Report
Basalt addresses the significant challenge many organizations face when implementing AI features: bridging the gap between promising demos and reliable production-ready AI systems. The platform recognizes that creating effective AI features requires collaboration between product managers, domain experts, and engineers, while demanding rapid iteration and testing. At its core, Basalt provides a sophisticated AI playground that facilitates prompt engineering and testing. Users can prototype quickly using a no-code interface, drafting prompts with co-pilot guidance and structured sections. The platform supports iterative development through version management and multi-model testing, allowing teams to compare different approaches and refine their AI features. A key strength of Basalt lies in its evaluation capabilities. Users can test their prompts against realistic scenarios by uploading existing datasets or having Basalt generate test cases. The platform includes over 50 AI evaluator templates to identify potential issues and ensure quality output across diverse scenarios. This systematic testing builds confidence in the AI feature before deployment. Once testing is complete, Basalt offers seamless deployment through its SDK, which abstracts prompts and integrates them directly into the user’s codebase. The platform continues to provide value post-deployment with production monitoring tools that capture logs, track usage patterns, and alert teams to new errors or edge cases. This comprehensive approach significantly accelerates the development cycle for AI features, allowing teams to move from concept to production-ready implementation up to 10 times faster than traditional methods. By providing structured workflows and tools specifically designed for AI development, Basalt helps organizations overcome the unique challenges of creating reliable AI features. The platform is particularly valuable for product managers looking to integrate AI capabilities without extensive coding knowledge, though it serves the entire AI development team with its collaborative features and technical capabilities.Country
United States (San Francisco, California)Pros & Cons
Pros
- No-code playground makes AI feature development accessible to non-technical team members
- AI-powered co-pilot provides guidance and improvement suggestions for prompts
- Comprehensive testing with 50+ evaluator templates ensures quality and reliability
- Seamless deployment via SDK simplifies integration into existing codebases
- Production monitoring helps identify and address issues in real-world usage
- Collaborative workflow supports cross-functional team participation
- Multi-model support allows testing across different AI providers
Cons
- Pricing for Pro plan is not transparently listed (custom quotes only)
- Relatively new platform launched in early 2025, with limited proven track record
- Learning curve may exist for teams new to AI development practices
- Depends on third-party AI models, inheriting their limitations
- May require integration work for complex enterprise environments
Pricing
Basalt offers a tiered pricing structure:- Free Plan: Available with limited features, suitable for exploration and small-scale projects
- Pro Plan: Custom pricing based on usage requirements and features needed
Competitor Comparison
| Feature | Basalt | Lisapet.ai | Vellum AI | PromptPerfect |
|---|---|---|---|---|
| Primary Focus | AI agent building \& evaluation | AI prompt testing | LLM prompt engineering \& testing | Prompt optimization |
| No-code Interface | Yes | Yes | Yes | Yes |
| AI Co-pilot | Yes | No | Partial | Yes |
| Test Case Generation | Yes | Yes | Partial | No |
| Production Monitoring | Yes | Limited | Yes | No |
| SDK Integration | Yes | Yes | Yes | Limited |
| Multi-model Support | Yes | Yes | Yes | Yes |
| Starting Price | Free plan available | Not specified | Not specified | \$8.33/month |
| Target Audience | Product managers, developers | Product managers, designers, AI engineers | Developers | Prompt engineers |
Team Members
- Francois de Fitte – Co-founder
- Guillaume Marquis – Founder \& CTO
- Alexis d’Eudeville – Co-founder
- Theophile Cousin – Founding Engineer
- Quentin Le Gall – Leading GTM (Go-to-Market)
- Victor Gross – Team member
- Nic Touron – Team member
- Matthieu Vaxelaire – Team member
- Meghan Regior – Team member
- Calliste Duru – Team member
Team Members About
- Francois de Fitte: Previously co-founded Popchef, a digital canteen service. He was recognized in Forbes 30 Under 30 for Arts and Culture in 2019. His educational background includes King’s College London (Law), Université Paris-Sorbonne (Law), HEC Paris (Entrepreneurship), and Sciences Po Paris (Marketing).
- Guillaume Marquis: Serves as Founder \& CTO at Basalt, focusing on helping teams go from idea to ready-to-deploy AI features in hours. He has a background in technical leadership and software development, with education from Heriot-Watt University.
- Alexis d’Eudeville: Author of the e-book “Building with AI: The Product Handbook.” He has experience as a 3x founder and previously worked at Google. He is focused on helping product builders develop effective AI products.
Team Members SNS Links
- Francois de Fitte: LinkedIn – https://fr.linkedin.com/in/francoisdefitte
- Guillaume Marquis: LinkedIn – https://www.linkedin.com/in/marquis-guillaume
- Alexis d’Eudeville: LinkedIn – https://www.linkedin.com/in/alexis-d-eudeville-348bb858
- Basalt Company Page: LinkedIn – https://www.linkedin.com/company/basalt-ai
- Official Website: https://www.getbasalt.ai