Catch cost spikes
before it's too late,
not on your
monthly invoice.
A single Slack summary every morning showing what changed across your cloud and AI vendors. No dashboards. No noise.
Works with your stack
What you get
Daily Slack Summary
Get one clear message every morning with the biggest usage changes across your connected services.
Smart Alerts
Alerts only when both the percentage and dollar impact are meaningful. Zero noise.
Ask in Slack
Ask things like 'What spiked yesterday?' and get direct answers based on real usage.
Simple pricing
Starter
Lock in 50% off forever when you join early access
- ✓All supported services
- ✓Daily Slack summary
- ✓Smart alerts
- ✓Slack Q&A
- ✓90-day history
- ✓Hourly polling (with vendor dependent data availability)
- ✓Real usage deltas, no hallucinations
Early access is limited — we're onboarding teams personally for best results.
Frequently asked questions
We currently support AWS, OpenAI, Datadog, MongoDB, and Anthropic.
Setup usually takes under five minutes. You only connect read-only billing and usage APIs, nothing else.
No. OnCost is read only and works without agents, tags, or infrastructure changes.
We poll your vendors hourly and surface updates as soon as they release new usage or cost data. Services like AWS CUR can delay data by 24–36 hours, so OnCost notifies you the moment fresh data becomes available.
Get ahead of cost surprises
Stop getting surprised by your cloud bills.
Officially Launching January 2026.