BETANow live · only 23 Early Bird spots left

Stop burningmoney on AI.

The only LLM cost tool that blocks the call before it fires. Not after your invoice arrives.

No credit card · first 50 lock $9/mo forever

python3 — agent.py

>>> router.chat("Write 10,000 word essay on history…")
  routing…  complexity=0.97  estimated cost $0.08
  PRE-FLIGHT CHECK FAILED  — $0.08 > remaining $0.0016
  no DNS · no TCP · $0 charged
BudgetExhaustedBLOCKED
  $0 charged · API never called · budget preserved
>>> 

$0 saved globally · 0 calls blocked · updated live

the problem

You're flying blind.

Every other tool shows you what happened. We're the only one that stops it first.

monitoring.py — alertsAFTER

$ python monitoring.py --project prod
  checking spend for Oct 2026…
  [2026-10-14 03:12] gpt-4o  tokens: 1.2M
  [2026-10-14 03:48] gpt-4o  tokens: 4.7M
  [2026-10-14 04:01] gpt-4o  tokens: 9.1M
  total billed: $847.32
  runaway agent detected — 3 days ago
Invoice already processed — nothing you can do

agent_loop.py — langchainLOOP

$ python agent_loop.py
  iter 1  cost $0.012  remaining $9.988
  iter 2  cost $0.019  remaining $9.969
  iter 3  cost $0.031  remaining $9.938
  iter …
  iter 312  cost $0.028  remaining $0.003
  iter 313  cost $0.031  remaining $0.000
  RateLimitError — budget exhausted
Monthly budget gone in 47 minutes

helicone — dashboardLOGS

  Total spend this month
  $2,841.00
  ████████████░░░░  71% of budget
  Top requests by cost ↓
  Write 50k-word report   $184.00
  Recursive agent task    $291.00
Beautiful charts. Not a single call was blocked.

the solution

noburn blocks first.

python3 — baar demo

>>> from baar import BAARRouter, BudgetExceeded
>>> router = BAARRouter(budget=0.02)
  # $0.02 hard cap — any call that would exceed it is blocked locally
>>> router.chat("What is 42 × 17?")
'714'  # spent $0.0001 · remaining $0.0199
>>> router.chat("Write a complete ML pipeline with feature engineering…")
BudgetExceededBLOCKED LOCALLY
estimated cost $0.024 > remaining budget $0.0016
no DNS lookup · no TCP connection · no tokens sent
$0 charged$0 CHARGED
>>> router.spent, router.remaining
($0.0184, $0.0016)

BLOCK

Pre-flight enforcement

Estimates cost before the call. If it would exceed the budget — no DNS, no TCP, no tokens. $0 charged.

raise BudgetExhausted  # locally

TRACK

Real-time metering

Per-project and per-user spend tracked live. Webhooks fire the moment a threshold is crossed.

event: budget.alert → 80%

BILL

Passthrough billing

Charge your customers exactly what they cost. Connect Stripe and it flows automatically.

invoice: $0.0031 → user_id

comparison

How noburn.dev is different.

The only self-serve tool that prevents the bill — not just measures it.

Feature	noburn.dev	Helicone	Portkey	LangSmith
Blocks call before it fires	✓	✗	✗	✗
Hard budget cap per project	✓	✗	enterprise	✗
Per-user spend limits	✓	✗	enterprise	✗
Pre-flight cost estimation	✓	✗	✗	✗
Spend alerts + webhooks	✓	PAID	✓	✗
Passthrough billing to customers	✓	✗	enterprise	✗
Self-serve (no sales call)	✓	✓	✗	✓
Free tier	✓	✓	✓	✓
* "enterprise" = Portkey Enterprise plan ($800+/mo) — not self-serve

integrations

Works with your stack.

Drop-in wrapper — 2 lines of code.

OpenAIAnthropicLiteLLMLangChainLangGraphVercel AIOpenAIAnthropicLiteLLMLangChainLangGraphVercel AIOpenAIAnthropicLiteLLMLangChainLangGraphVercel AI

social proof

Builders shipping AI products use noburn.

Acme AI

Forge Labs

NovaSpark

Qubit Works

DK

Daniel Kraft

@dkraft_dev

Switched to noburn last week. Agent budget overruns went from a weekly fire drill to literally zero. The pre-flight blocking is exactly what was missing from every other LLM tool.

♥142

SR

Sofia Ramirez

@sramirez_ml

Our LangGraph agents were burning $300/day in dev. Two lines of noburn code and that's just... gone. $9/mo is not a real price for this.

♥287

TN

Takeshi Nakamura

@tnakamura_io

Helicone showed us the problem in beautiful charts. noburn actually stops it. That's the whole gap in the market right there.

♥411

faq

Common questions.

pricing

Start free. Scale when you need to.

First 23 users lock Early Bird at $9/mo forever.

Free

[✓]50k requests / month
[✓]1 project
[✓]1 seat
[✓]Blocked request log
[✓]Email alerts

Join waitlist

23/50 spots left

Early Bird

$9/ mo

27 taken23 left

[✓]500k requests / month
[✓]3 projects
[✓]3 seats
[✓]Webhooks
[✓]Per-user metering
[✓]Locked at $9 forever

Join waitlist

Pro

$49/ mo

[✓]5M requests / month
[✓]Unlimited projects
[✓]10 seats
[✓]Passthrough billing
[✓]$0.001 per 1k req overage
[✓]Priority support

Join waitlist

early access

Get notified when we launch.

First 23 people on the list lock in $9/mo forever. No credit card. We'll email you when your spot is ready.