Bill calculator

Paste your usage export. See your bill.

Drop in a CSV of sandbox sessions or active hours per day from your current provider. We compute what the same usage would cost per month on Dormo, boat.dev, E2B, Daytona and Modal at public list prices.

Runs entirely in your browser. Your file is never uploaded.

Default VM size (used when the CSV has no size column)
Added after each session for Dormo, E2B, Daytona and Modal (time before idle is detected). Our default auto-pause is 5 min.

boat.dev bills while a machine runs and stops it on a TTL you set (1 h to 30 days, or off). Pick what matches your setup.

Paste a CSV or load a sample to start.

    Accepted formats

    Comma, semicolon or tab separated, with a header row. Column names are matched case-insensitively.

    • Sessions: sandbox_id (or id, vm_id), start and end (or started_at/ended_at, start_time/end_time). Times as ISO 8601 or Unix seconds/milliseconds; times without a zone are read as UTC. Overlapping sessions of the same sandbox are merged.
    • Hours per day: hours (or active_hours, hours_per_day), optionally sandbox_id and date. Each row is one sandbox-day.
    • Optional size column: small, default or large, or vcpu (2, 4, 8).

    How the bill is computed

    Dormo: active hours × $0.015 / $0.030 / $0.060 per hour (small / default / large), −50% for batch; a default VM is capped at the $19.90/month always-on price when that is cheaper. E2B, Daytona, Modal: active hours × list price. boat.dev: hours the VM is running under the auto-stop setting above × list price.

    List prices per battleships.dev, as of 2026-10-14, for 4 vCPU / 8 GB per hour: boat.dev $0.036, E2B $0.331, Daytona $0.331, Modal $0.760 (sources: battleships.dev, boat.dev, E2B, Daytona, Modal). For small and large they are scaled linearly from the 4/8 price, which is an approximation. Compute only: plan fees, credits, storage, free tiers and volume discounts are not included. Estimates, not quotes; vendors may change prices.

    Want us to check the result with you? Email the export to hello@dormo.dev or tell us about your workload.