Stop overpaying for repeated AI requests

Your OpenAI bill is probably

WatchLLM caches similar API requests so you never pay twice for the same answer.

See your savings in real-time. Setup takes 5 minutes.

No credit card required • 10,000 requests free

Works with OpenAI, Anthropic, GroqChange 1 line of code

Request

Cache check

HIT ~50ms

Direct billing with your provider keys—no markup on API costs

Built for Production

Features that actually matter when you're managing millions in LLM spend

These features are live in production today → View full changelog

Why WatchLLM

Cut your AI bill without cutting features

Most apps send duplicate or near-duplicate prompts. You're paying full price every time. We fix that.

40–70% savings

Stop Paying Twice

Similar questions get the same answers. WatchLLM detects when your users ask semantically similar prompts and returns cached responses instantly.

Real-time

See Your Waste

Your dashboard shows exactly how much money you're losing to duplicate requests. Watch it shrink as caching kicks in.

1 line change

5 Minute Setup

Change your API base URL. That's it. No code changes, no infrastructure, no migrations. Works with your existing OpenAI/Anthropic/Groq code.

<50ms

Faster Responses

Cache hits return in under 50ms instead of waiting 1-3 seconds for the API. Your users get instant answers.

Email alerts

Usage Alerts

Get notified when you hit 80% of your budget or when a specific endpoint starts burning through cash unexpectedly.

Full logs

Request History

Every request is logged with cost, latency, and cache status. Export to CSV for your accountant or dig into the data yourself.

How It Works

Start saving in 3 steps

No infrastructure changes. No migrations. Just swap one URL.

Works With Everything

Drop-in replacement for any OpenAI-compatible endpoint

Framework & SDK Integrations

LangChainSDK Available

LlamaIndexSDK Available

Vercel AI SDKDrop-in Proxy

Next.jsNative Support

PythonOfficial SDK

Node.jsOfficial SDK

Just change your base URL — no code rewrite needed

baseURL:"https://api.watchllm.dev/v1"

Security You Can Trust

Bank-level security for your API keys and sensitive data

SOC 2 Type II

Enterprise security controls

In Progress

AES-256-GCM

Military-grade encryption

Active

GDPR Compliant

EU data protection

Active

ISO 27001

Information security

Planned Q2

Security Features

End-to-end encryption (AES-256-GCM)

PBKDF2 key derivation (100k iterations)

Automatic API key leak detection

Comprehensive audit logging

Anomaly detection & alerting

Zero-knowledge architecture

Vulnerability disclosure program

Need a security review?

Request our security whitepaper or schedule a call with our team

Contact Security

Trusted by teams at

YC Portfolio

Enterprise SaaS

AI Research Labs

FinTech Startups

Developer Tools

"WatchLLM saved us $47k in the first month. The cost tracking accuracy is unmatched."

SC

Sarah Chen

VP Engineering

,

AI Startup YC W24

"The agent debugger alone is worth the price. We cut debugging time from hours to minutes."

MR

Michael Rodriguez

Lead ML Engineer

,

Enterprise SaaS

"Finally, LLM observability that doesn't require rewriting our entire codebase."

Join hundreds of teams saving millions on LLM costs

Pricing

Pays for itself in days

If you're spending $200+/month on OpenAI, these plans save you money.

  • •10,000 requests/month
  • •10 requests/minute
  • •Basic semantic caching
  • •7-day usage history
  • •1 project

Exceeded your limit? No problem:

Cache-only mode after 10k requests (no additional charges)

Starter

For growing applications

  • •100,000 requests/month
  • •50 requests/minute
  • •Advanced semantic caching
  • •30-day usage history
  • •Email support

Exceeded your limit? No problem:

$0.50 per 1,000 additional requests (up to 200k total)

Pro

For production workloads

  • •250,000 requests/month
  • •Unlimited requests/minute
  • •Priority semantic caching
  • •90-day usage history
  • •Priority support

Exceeded your limit? No problem:

$0.40 per 1,000 additional requests (up to 750k total)

  • •10M+ requests/month
  • •Custom rate limits
  • •Dedicated infrastructure
  • •Custom retention
  • •SLA

Exceeded your limit? No problem:

Custom overage rates negotiated

FAQ

Frequently asked questions

Everything you need to know about WatchLLM.