Klu.ai
Collaborative prompt engineering platform with multi-LLM evaluation and fine-tuning.
Klu.ai is profiled here as a Prompt Management tool for engineering teams. Read about features, pricing, and how it compares to related options in the tools directory.
Description
Short Intro: Klu.ai is a proprietary LLM application platform founded in 2022 by Stephen M. Walker II, operating from London and San Francisco. The company raised a $1.7M pre-seed in October 2023 from Firstminute Capital, with scout investments from a16z, Sequoia, and Atomico, and angels from Superhuman, IBM, and Productboard. No follow-on funding has been publicly disclosed in the 2.5 years since that round, and CB Insights' Mosaic Score shows a significant decline over the past 30 days. Enterprise buyers evaluating Klu.ai should verify current platform status and vendor stability before committing to a production deployment.
Key Capabilities:
Collaborative Prompt Studio with shared versioning, rollback, and team-level visibility across prompts
Unified API for 30+ LLM providers enabling model swapping without rewriting integrations
Automated head-to-head A/B evaluation of prompt and model changes against production performance
Fine-tuning workflows for OpenAI models, Llama 2, and Mistral using your own data
RAG integration for connecting data sources and giving applications custom retrieval context
Cost tracking and usage analytics across prompts, chats, and workflows
User feedback collection and data labeling for curating fine-tuning datasets
Enterprise Container for private cloud or on-premises deployment with SSO and activity logs
Alternative tools
- MLflow
Track experiments, manage models, and evaluate LLM applications across the full ML lifecycle
- Langtrace
Trace LLM application calls with OpenTelemetry and route data to any observability backend
- Opik by Comet
Trace, evaluate, and monitor LLM applications across the full development lifecycle
- Orq.ai
European enterprise AI agent platform with EU AI Act compliance and agent runtime orchestration.
- Humanloop
Prompt management and LLM evaluation platform — acqui-hired by Anthropic; platform ceased September 2025.
- Langflow
Visual drag-and-drop AI workflow builder with built-in MCP server deployment — now part of IBM.