Optimize GPT-4 Apps
Enhance your AI systems with our robust optimization features.
Prompt Engineering, Fine Tuning, AB Testing, and Comparisons.

Build with your choice of best-in-class LLMs on Klu, including
Comprehensive Capabilities for AI Systems
Klu.ai offers a comprehensive suite of capabilities for technology companies building and deploying AI systems, including model evaluation, optimization, comparison, and continuous monitoring.

- Prompt Engineering
- Craft effective prompts
- Fine-tuning
- Refine models for optimal performance
- AB Testing
- Test different versions of your AI models
- Comparisons
- Compare LLM performance
Advanced Vector Database
Build and scale on any major LLM provider, comparing models in real-world deployments. Ship advanced use cases with multi-tenant meta filtering.
Observe and improve your features with state-of-art optimization techniques. All data is yours, and easily portable to other systems.
Developer-focused tooling for Python, TypeScript, and React UI accelerates development.

- LLM Providers
- Avoid lock-in, choose any provider
- Observe
- Usage, cost, and performance insights
- Vector RAG
- Add context documents via APIs or UI
- Vector Filtering
- With Context Metadata
- Feedback
- Real-world user behavior and feedback
- Data Management
- Advanced filters, import/export
- A/B Experimentation
- Gather real-world data
- Fine-tuning
- Fine-tune models with your best data
- SDK
- Build with Klu Python, TypeScript, and React SDKs
Ready for your unique use cases.
Gather insights into content creation, workflows, and assistants.
- Copilot
- Give your users superpowers with an AI-powered, expert Copilot with Context.
- Slash command
- Generate dynamic, content on demand, with document reference.
- Help and support
- Create chat experiences with your brand voice and domain expertise.
- Coaching
- Create on-demand, relevant coaching for your team.
- Summarization
- Summarize large documents and write in your organization's style.
- Lead qualification
- Quickly qualify leads with your criteria and spend more time selling.
- Content creation
- Create content with dynamic prompts, and relevant context.
- Customer experience
- Analyze user feedback and sentiment, and understand needs.
- Data transformation
- Extract, clean, and transform data in seconds.
Functionality that scales with you.
Start for free, build generative actions, and upgrade as you grow.
All plans include FREE GPT-4-turbo runs for prototyping.
Hobby
Get started with Klu – FREE for your first AI App and Actions. Perfect for hobby projects.
FREE
Get Started- 1k Monthly Runs
- 1k Documents
- 1 App & Context
- Capture User Feedback
- Standard Support
- FREE GPT-4-turbo
Pro
10x more usage, perfect for small projects and teams optimizing features.
$97/month
Get Started- 10k Monthly Runs
- 100k Documents
- 3 Apps & Context
- Team Collaboration
- Deploy Environments
- Change Versioning
- Capture User Feedback
- Standard Support
- FREE GPT-4-turbo
Enterprise
Enterprise-scale Klu, with activity logs, reporting, and workspace security.
Contact Us
Request Demo- 100k+ Monthly Runs
- Unlimited Documents
- Everything in Pro, plus:
- Unlimited Apps & Context
- AI Analysis & Labeling
- A/B Experiments
- Evaluations
- Fine-tuning
- Reporting
- Roles & Permissions
- Private Cloud Option
- Dedicated Success Team
- SOC2 Compliance
- Custom Services
- FREE GPT-4-turbo
By 2030, every product will be powered by AI, and personalized to each user. Let’s get started today.
Klu transforms how AI Engineers & Teams work, enabling rapid iteration based on model, prompt, and user insights.
The future is not about building AI systems to replace humans, but about building new functionality that help people finish boring work faster, spot blindspots, and uncover new opportunities to do their best work.
Klu enables every software product to personalize to the person using it, and help them learn and accomplish tasks faster, better, and more efficiently.
Founding Team
Stephen M. Walker II
Co-Founder / CEO
Stefan Sabev
Co-Founder / CTO
10 Minutes
From Zero to Production
Gather LLM app insights in under 10 minutes.
10x Faster
Teams ship 10x Faster with Klu
Move faster than the competition, learn from customers, and create a competitive moat around your business.
90% Cost Savings
Replace Human Labeling
Klu's RLAIF labeling matches human-level performance and preference.
It's time to build
Collaborate with your team on reliable Generative AI features.
Want expert guidance? Book a 1:1 onboarding session from your dashboard.