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Respan

verifiedFreemiumAPIkeywordsai.co

LLM engineering platform that routes calls through one gateway to 500+ models and adds tracing, evaluations and spend monitoring.

What it does

Respan (by Keywords AI) is an LLM engineering and observability platform. It routes traffic through a single gateway to 500+ models with fallbacks and caching, captures every call as a trace, runs evaluations combining rule checks, LLM judges and human review, and monitors cost, latency, errors and tokens with dashboards and alerts.

How to use: To use Keywords AI, integrate it into your code with just 2 lines of change. It's OpenAI compatible, allowing you to switch without rewriting code. Sign up for a free trial API key to explore the testing playground and chatbot.

Core features

Unified gateway to 500+ models
Automatic fallbacks, retries and caching
Full request tracing with span latency
Evaluation workflows (rules, LLM judge, human)
Online evals on sampled production traffic
Usage, cost and latency dashboards with alerts
Prompt management and experiments

Best for

→Routing and load-balancing LLM traffic
→Debugging agents via traces
→Evaluating LLM output quality
→Monitoring LLM cost and reliability in production

Pricing

Free
Team
$199/mo
Toolspool rankingby monthly traffic

Reviews

Big-picture takes: what it's for and whether it delivers. High-engagement YouTube videos — not sponsored.

Keywords AI YC Application Video (Accepted W24)
Respan · 35K views