Cirrondly vs AWS Cost Explorer: Why Dashboards Don't Fix Your Bill

By Jose Marin, founder of Cirrondly. March 2026

TL;DR: AWS Cost Explorer is a free reporting dashboard that shows you what you spent by service, region, and time period. Cirrondly is an AI agent that identifies the specific resources wasting money, explains why, and executes the fix with your approval. Cost Explorer tells you "EC2 cost $127 last month." Cirrondly tells you "instance i-0abc123 has been idle for 47 days, costing $18/month — want me to stop it?" They solve different problems: Cost Explorer is for visibility, Cirrondly is for action.

AWS Cost Explorer is a good tool. It shows you what you spent, which services cost the most, and how your spending trends over time. If you're disciplined enough to check it weekly, filter by service, and cross-reference with your resource inventory, you can find waste.

Most people don't do that.

Not because they're lazy — because they're building a product. They have features to ship, bugs to fix, customers to talk to. Spending an hour in Cost Explorer every week to figure out why the bill went up $40 is not a good use of their time.

That's the fundamental problem with dashboards: they show you data and expect you to do the work.

What Cost Explorer actually does

Let's be fair about what Cost Explorer gives you. It's included free with every AWS account, and it's genuinely useful for understanding your bill at a high level.

It shows you total spend over time. It breaks down costs by service — EC2, RDS, S3, Lambda. It lets you filter by region, by tag, by usage type. You can set budgets and get alerts when you exceed them.

For a finance team at a mid-size company, this is exactly what they need. They want charts for board decks and monthly reports. Cost Explorer delivers.

For a startup founder who wants to stop wasting money? It falls short.

The gap between seeing and doing

Here's what Cost Explorer shows you: "Your EC2 costs were $127 last month."

Here's what it doesn't tell you:

• Which specific instances are idle
• Whether those instances have been idle for a week or three months
• What will happen if you stop them
• Whether the EBS volumes attached to them will keep billing
• Whether there's an Elastic IP that will start charging the moment you stop the instance

To answer those questions, you need to leave Cost Explorer, go to the EC2 console, check CloudWatch metrics for each instance, cross-reference with your application architecture, and make a judgment call.

That's not cost management. That's an investigation. And you have to do it for every service — EC2, RDS, EBS, S3, ALB, DynamoDB, ElastiCache, CloudWatch Logs. Each with its own console, its own metrics, its own gotchas.

The dashboard paradox

The more detailed a dashboard gets, the more expertise it requires to use. Cost Explorer gives you the data. But data without context is just noise.

You see a spike in your S3 costs. Is it because you stored more data? Because you made more API calls? Because a lifecycle policy expired? Because someone uploaded a 50 GB file to the wrong bucket? Cost Explorer can show you the cost went up. It can't tell you why in a way that leads to action.

This isn't unique to AWS. Every monitoring dashboard has the same problem: it assumes the person looking at it knows what to look for. For cost optimization specifically, that means understanding AWS pricing models, knowing which resource states incur charges, and remembering what resources exist across your account.

Most startup teams don't have that expertise. They shouldn't need to.

What an AI agent does differently

An agent doesn't wait for you to open a dashboard. It doesn't present you with charts and expect you to draw conclusions. It does the investigation itself and comes to you with findings.

Instead of "Your EC2 costs were $127 last month," an agent says: "You have an EC2 instance (i-0a3b4c5d) in us-east-1 that's been running for 47 days with average CPU usage of 2%. It's costing you $18/month. If you stop it, you'll save $18/month. The attached EBS volume will continue to cost $5/month — do you want me to snapshot and delete that too? Want me to do it?"

That's not a dashboard. That's a colleague who happens to know AWS pricing inside out.

Where Cost Explorer wins

I'm not saying Cost Explorer is useless. It's the right tool for specific jobs:

• Finance reporting: Monthly cost breakdowns for accounting and board decks
• Trend analysis: Understanding how your costs change as your product scales
• Budget alerts: Getting notified when spending exceeds a threshold
• Tag-based allocation: Splitting costs between teams or projects

If your goal is understanding your bill, Cost Explorer is great. If your goal is reducing your bill, you need something that goes further.

Where Cirrondly wins

Cirrondly is an AI agent that connects to your AWS account and does the investigation that Cost Explorer leaves to you.

It scans 8 service types (EC2, RDS, EBS, S3, ALB, DynamoDB, ElastiCache, CloudWatch Logs) and identifies specific resources that are wasting money — not categories, not line items, but actual resources with names, IDs, and reasons why they're wasteful.

Then it tells you what to do about each one. In plain language, not in a chart. And when you approve, it executes the optimization through your AWS account.

The difference is simple: Cost Explorer shows you data. Cirrondly gives you decisions.

Cost Explorer: "Your EBS costs were $47 last month." Cirrondly: "You have 3 unattached EBS volumes totaling 470 GB, costing $47/month. They've been unattached since January. Want me to snapshot them and delete the volumes?"

One requires 20 minutes of investigation to act on. The other requires one word: "Yes."

They're not competitors — they're different tools

The best setup for a startup on AWS is both: Cost Explorer for the big picture, and an agent for the action items. Cost Explorer tells you where your money goes. Cirrondly tells you where your money is being wasted and fixes it.

If you're comparing the broader landscape, the next useful read is 7 Best AWS Cost Optimization Tools in 2026. It shows where reporting tools, commitment-management tools, and execution tools fit relative to each other.

If you're running a startup on AWS and your current cost strategy is "check Cost Explorer when the bill feels high," you're leaving money on the table.

Check your AWS account for waste right now - two ways:

Free CSV diagnosis (10 seconds, no signup): Export your Cost Explorer CSV and upload it. You'll see exactly which services are costing you more than they should. Try the free diagnosis →

Full agent (connects to your AWS account): Cirrondly scans your actual resources, detects idle instances, unattached volumes, and overprovisioned databases - then fixes them with your approval. Start saving with Cirrondly →

Jose Marin is the founder of Cirrondly and a full-stack engineer with 9 years of experience. Previously CTO. Based in Lyon, France. He builds tools that help startups use AWS without billing anxiety.