Your OpenAI bill is probably
No credit card required • 10,000 requests free
Avg. Savings
Cache Hit Speed
Setup Time
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
100% Cost Accuracy
21/21 models verified with 0% variance
- Database-driven pricing
- 7-day staleness alerts
- Auto price updates
Agent Debugger
Step-by-step timeline with full replay
- Tool call tracking
- Loop detection
- Cost per step
99.9% Cache Hit Rate
Semantic caching with streaming support
- Request deduplication
- Configurable TTL
- Race protection
Enterprise Security
AES-256-GCM with PBKDF2 key derivation
- Audit logging
- Anomaly detection
- Auto leak prevention
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.
Stop Paying Twice
Similar questions get the same answers. WatchLLM detects when your users ask semantically similar prompts and returns cached responses instantly.
See Your Waste
Your dashboard shows exactly how much money you're losing to duplicate requests. Watch it shrink as caching kicks in.
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.
Faster Responses
Cache hits return in under 50ms instead of waiting 1-3 seconds for the API. Your users get instant answers.
Usage Alerts
Get notified when you hit 80% of your budget or when a specific endpoint starts burning through cash unexpectedly.
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.
Change one line
Use your existing OpenAI/Anthropic API keys. WatchLLM never marks up API costs—you pay provider rates directly. We only charge our platform fee.
const client = new OpenAI({
baseURL: "https://proxy.watchllm.dev/v1",
apiKey: process.env.OPENAI_API_KEY, // Your OpenAI key
defaultHeaders: {
"X-WatchLLM-Key": process.env.WATCHLLM_API_KEY // Auth only
}
});Semantic matching
We vectorize your prompt and search our distributed cache for semantically similar queries using cosine similarity. Our matching algorithm achieves >95% accuracy in identifying similar prompts.
// We automatically:
// 1. Vectorize your prompt
// 2. Search Redis vector DB
// 3. Find similar queries (>95% match accuracy)Instant response
Cache hit? Return in <50ms. Cache miss? Forward to your provider and cache the response for next time.
// Cache hit: ~50ms response
// Cache miss: Normal latency
// Auto-caching for future requestsChange one line
Use your existing OpenAI/Anthropic API keys. WatchLLM never marks up API costs—you pay provider rates directly. We only charge our platform fee.
const client = new OpenAI({
baseURL: "https://proxy.watchllm.dev/v1",
apiKey: process.env.OPENAI_API_KEY, // Your OpenAI key
defaultHeaders: {
"X-WatchLLM-Key": process.env.WATCHLLM_API_KEY // Auth only
}
});Semantic matching
We vectorize your prompt and search our distributed cache for semantically similar queries using cosine similarity. Our matching algorithm achieves >95% accuracy in identifying similar prompts.
// We automatically:
// 1. Vectorize your prompt
// 2. Search Redis vector DB
// 3. Find similar queries (>95% match accuracy)Instant response
Cache hit? Return in <50ms. Cache miss? Forward to your provider and cache the response for next time.
// Cache hit: ~50ms response
// Cache miss: Normal latency
// Auto-caching for future requestsWorks With Everything
Drop-in replacement for any OpenAI-compatible endpoint
Framework & SDK Integrations
Just change your base URL — no code rewrite needed
Security You Can Trust
Bank-level security for your API keys and sensitive data
SOC 2 Type II
Enterprise security controls
In ProgressAES-256-GCM
Military-grade encryption
ActiveGDPR Compliant
EU data protection
ActiveISO 27001
Information security
Planned Q2Security Features
Need a security review?
Request our security whitepaper or schedule a call with our team
Trusted by teams at
"WatchLLM saved us $47k in the first month. The cost tracking accuracy is unmatched."
"The agent debugger alone is worth the price. We cut debugging time from hours to minutes."
"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.
Calculate Your Savings
Estimate your savings from semantic caching in seconds.
Monthly savings from caching
$250
Recommended plan
Pro
Net savings after fee
$151
Break-even time
12 days
Annual savings
$1,812
Assumes an average of $0.002 per request to estimate volume. Adjust after signup.
Start saving $151/month →Free
For side projects
- •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)
Agency
For high volume
- •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.