Compare
Reserver vs AWS Cost Explorer.
Cost Explorer recommends a purchase. It does not place one. Its expiry alerts stay off until somebody turns them on, they go to a list of email addresses, and they only ever notify. Reserver watches every reservation from the first scan and shows every expiry date on one radar. Renewal autopilot will re-buy a term on its own. It is on the roadmap.
What AWS Cost Explorer does well
A fair look at AWS Cost Explorer, from its own site.
Cost Explorer reads billing history already sitting in your AWS account and turns it into Reserved Instance purchase recommendations, plus coverage and utilization reports, with no extra cost and no new vendor to add.
How the pricing models differ
AWS Cost Explorer's own published pricing model.
Free to view in the AWS console. Each paginated Cost Explorer API request costs $0.01; there is no other charge, and Cost Explorer cannot be disabled once turned on.
Reserver charges one flat monthly price at every tier. Watch is free, forever. Autopilot and Scale are flat monthly fees, never a percentage of what Reserver finds or buys.
Side by side
AWS Cost Explorer and Reserver, capability by capability.
| Capability | AWS Cost Explorer | Reserver |
|---|---|---|
| Matches reservations to what's actually running | ~coverage and utilization reports, not a live per-instance match | ✓ |
| Flags expiries before they lapse | ~opt-in email alerts, 7, 30, or 60 days ahead, off by default | ✓expiry radar, in the app |
| Re-buys renewals automaticallybuilding · M5 | ✗the alert notifies; the purchase stays manual | ○renewal autopilot |
| Shows the exact purchase math | ~gives a recommendation, not a break-even or $/yr figure | ✓term, payment, break-even, $/yr |
| Buys reservations for youbuilding · M4 | ✗recommendations only; you place every purchase in the console | ○you buy in the AWS console today |
| One coverage view across many accounts | ~consolidated billing view, not a match to what each account runs | ✓every account you connect |
| Price stays flat as you grow | ✓free to view; API calls are billed per call | ✓never a cut of your savings |
AWS Cost Explorer
- ~Matches reservations to what's actually runningcoverage and utilization reports, not a live per-instance match
- ~Flags expiries before they lapseopt-in email alerts, 7, 30, or 60 days ahead, off by default
- ✗Re-buys renewals automaticallybuilding · M5the alert notifies; the purchase stays manual
- ~Shows the exact purchase mathgives a recommendation, not a break-even or $/yr figure
- ✗Buys reservations for youbuilding · M4recommendations only; you place every purchase in the console
- ~One coverage view across many accountsconsolidated billing view, not a match to what each account runs
- ✓Price stays flat as you growfree to view; API calls are billed per call
Reserver
- ✓Matches reservations to what's actually running
- ✓Flags expiries before they lapseexpiry radar, in the app
- ○Re-buys renewals automaticallybuilding · M5renewal autopilot
- ✓Shows the exact purchase mathterm, payment, break-even, $/yr
- ○Buys reservations for youbuilding · M4you buy in the AWS console today
- ✓One coverage view across many accountsevery account you connect
- ✓Price stays flat as you grownever a cut of your savings
How to choose
Choose AWS Cost Explorer. Choose Reserver. Both are real answers.
Choose Cost Explorer if your fleet sits in one AWS account, you want to add no extra cost, and you are willing to run the coverage report and place every purchase yourself.
You want one flat monthly price at every tier, from a handful of reservations to thousands, with the exact purchase math shown and every expiry on one radar. Renewal autopilot is on the roadmap, not yet in the app.
Sources
Checked against AWS Cost Explorer's own site on 2026-08-27.
AWS Cost Explorer pricing: https://docs.aws.amazon.com/cost-management/latest/userguide/ce-what-is.html. AWS Cost Explorer product: https://aws.amazon.com/aws-cost-management/aws-cost-explorer/, expiration alerts. Verified 2026-08-27. Vendor pricing and features change; check AWS Cost Explorer's own page for the current terms before you decide.
Stop overpaying for a steady fleet.
Reserver is in early access. Join the list, and we will onboard you when we have capacity. Your first recommendation lands within minutes of connecting.