Can I compare annual and monthly subscriptions?

Yes. Enter each real charge and choose Monthly or Annual. StackDiet converts known amounts to a monthly equivalent before comparing scenarios.

Can I model adding or replacing an AI tool?

Yes. Use Add for a new planned tool, Change for a different price or plan, Remove for a planned cancellation, or Keep for no change.

Where is my cost data stored?

The calculator stores entries locally in your browser so you can return to the same scenario on the same device. No signup is required.

FREE COST SCENARIO TOOL

AI Stack Cost Calculator

Q: Does StackDiet guess AI subscription prices?

No. The calculator only uses costs you enter. Missing prices remain unknown.

Q: Is the calculated saving guaranteed?

No. A lower scenario cost is only the mathematical difference between the current and planned prices you entered. It is not a guarantee that cancelling or changing a tool is safe or practical.

See what your AI and SaaS stack costs now, model a leaner keep/remove/change scenario, and compare the known result with a monthly budget. StackDiet never invents missing prices.

100% freeNo signupNo guessed pricesShareable result

Build your current vs planned stack

Enter the amount you actually pay. For Change, add the planned replacement/plan cost. For Add, only the planned cost matters. Unknown values stay out of the savings calculation.

Tool / serviceCurrent costBillingPlanNew costNew billing

Known current spend

€0.00

€0.00 / year

Known planned spend

€0.00

€0.00 / year

Comparable monthly change

€0.00

€0.00 / year

Budget status

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Add a monthly target to compare.

Add your real costs to build a scenario.

Only comparable rows are used for the change estimate. Missing prices are never guessed.

Important: a lower planned cost is a scenario, not guaranteed savings. Before cancelling or replacing a tool, check usage, data export, dependencies, integrations, notice periods and switching effort.

Scenario summary

Audit the stack itself →

How this differs from the audit calculator

The AI Subscription Audit Calculator helps total current spend and flag rarely used subscriptions for review. This calculator is for scenario planning: keep a tool, remove it, change its plan or price, or add a new tool and see how the known monthly and annual totals move.

Useful next steps: use the AI Tool Overlap Calculator before removing overlapping tools, the AI Tool Budgeting Guide to set a spend ceiling, the SaaS Cost Optimization Guide for safer cost cuts, and the Switching Cost Checklist before replacing anything.

AI stack cost calculator FAQ

Does StackDiet guess AI subscription prices?

No. Enter the amount you actually pay. Missing values remain unknown and are excluded from cost-change estimates.

Is the calculated saving guaranteed?

No. It is only the difference between the current and planned prices you entered. A cheaper scenario can still be a bad decision if it breaks a workflow or creates switching costs.

Can I mix monthly and annual subscriptions?

Yes. Each current and planned amount can be monthly or annual. StackDiet converts known values to monthly equivalents before comparing them.

Can I model adding a new AI tool?

Yes. Choose Add, enter the planned cost, and leave the current cost blank. The new cost is included in the planned scenario.

Can I model a cancellation?

Choose Remove. The planned cost becomes zero for that row, while the current cost stays in the baseline.

Where is my data stored?

Your entries are stored in local browser storage on the same device. No StackDiet account is required.

Comparing email-platform costs? Use MailerLite alternatives or Kit alternatives to identify the real replacement tier before modeling the change.

AI Stack Cost Calculator

Build your current vs planned stack

Share the aggregate result

Scenario summary

How this differs from the audit calculator

AI stack cost calculator FAQ

Does StackDiet guess AI subscription prices?

Is the calculated saving guaranteed?

Can I mix monthly and annual subscriptions?

Can I model adding a new AI tool?

Can I model a cancellation?

Where is my data stored?

Unsure whether one subscription earns its cost?