A weekly digest showing what changed in your AWS bill, the deploy or resource change it lines up with, the evidence, and the fix.
We're building this now. Reserving is free — no card, no charge.
AWS spend +$1,180 (+19%) vs last week. One change explains most of it:
a3f9c1 (PR #412).
A $400 spike shows up three weeks later, buried in a line item nobody's watching.
It can tell you NAT Gateway traffic doubled. It can't tell you which deploy did it.
Cross-referencing CloudTrail with git log to find the commit behind the spend.
Hover or tap a tool to see what it misses.
Surprise costs start when real traffic hits. Neither tool watches that stretch for you.
If there's no clear link between a cost change and a deploy or resource event, we list it as unattributed instead of guessing.
Coming later: NAT/egress attribution, cross-AZ costs, commitment expiry tracking.
Read-only IAM role, nothing more. We can't launch, modify, or delete a single resource in your account.
The setup template is public, so you can read every permission before you deploy it.
Your billing export stays in your own S3 bucket. We read it; we don't keep a copy.
Disconnect any time by deleting the role. We delete what we've stored.
Pays for itself if it catches one $50/mo leak.
A one-time report on your top cost changes and their fixes.
AWS bills up to $10k/mo.
AWS bills up to $50k/mo.
Leave your email to reserve the founding price. No card, no charge, and no spam. We'll only email you when it's ready.
You're in. Founding price reserved.
3 quick questions so we build the right thing (10 seconds):
Thanks. This helps a lot.
You're in — founding price reserved. We read every signup ourselves and will email you the day it's live.
Read-only billing data, CloudTrail, and resource metadata — via a role you create yourself from our public CloudFormation template. We can't write to your account.
The read-only role, plus Cost and Usage Report (CUR) 2.0 with resource IDs enabled on your account. We'll walk you through turning it on — your cost history with CostBlame starts from that day.
No. It shows what changed at the same time and how strong the link is. If there's no clear link, it says so.
AWS only, for now. GCP and Azure are next, once the AWS beta is out.
We're building it right now. Everyone who reserved gets an email the day it's ready, with the founding price.
No. Reserving is free and needs no card. If you don't like it at launch, you just don't sign up.
Your monthly AWS bill before credits.
We'll tell you before anything changes. No surprise charges.
The free audit shows what we'd find. Paid plans catch new issues every week.