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Enter GB, requests, invocations or hours: the units you already know from your architecture.
Estimate the bill before it arrives
Independent calculators for AWS, Azure, Google Cloud, and Cloudflare. Public list prices.
Compared on public list prices
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Four calculators, comparable units
Input the same usage. Read ranked on-demand list prices.
Cloud Data Egress Cost Calculator
OpenEstimate data transfer and egress costs across AWS, Azure, GCP, and Cloudflare.
Object Storage Cost Calculator
OpenCompare S3, Blob, GCS, and R2 storage, request, and egress costs.
Serverless API Cost Calculator
OpenEstimate Lambda, Functions, Cloud Run, and Workers costs.
Small Cloud VM Cost Calculator
OpenCompare small Linux VMs on AWS, Azure, GCP, and DigitalOcean, including transfer.
From a real workload to an explainable number
Normalize units
We convert every cloud's billing units into a common model so comparison is fair.
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Every line item, free-tier impact, and source is shown. No black-box total.
Latest writing
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Aug 25, 2026
From calculator to production: a cost-aware launch checklist
Turning SightLab calculator results into concrete pre-launch, post-launch and first-month review checks that keep the real bill close to the estimate.
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Aug 24, 2026
Observability stack on a budget: what to keep and what to drop
Metrics, logs and traces cost levers and the practical minimum viable combination for a small team that still needs to debug production.
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Aug 23, 2026
Handling large file uploads without destroying the egress budget
Direct-to-object-storage patterns, multipart uploads, pre-signed URLs and the security points that keep large uploads from becoming an egress or security problem.
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Aug 22, 2026
When managed databases stop being cheaper than self-hosted
Connection limits, storage IOPS, backup and cross-region replication costs that tip the balance, with a simple framework for the comparison.
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SightLab Cost is unaffiliated with any vendor. All pricing is drawn from public list prices, with every step of the calculation visible.
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Open toolsEstimates are based on publicly available on-demand list prices and are for informational purposes only. Actual bills may differ due to taxes, discounts, free tier usage, data transfer patterns, and other factors.