Vendor Comparison Calculator

Use this vendor comparison calculator to rank vendor options with visible cost, fit, support, integration, risk, and weighting assumptions.

Planning estimate

Live calculator

Vendor comparison

Vendor inputs

Score fit and support from 1 to 5. Lower integration effort and lower risk are better.

Vendor A
Vendor B
Vendor C
Top vendorVendor A

77.8 out of 100 weighted score.

Top vendor cost$16,900.00

Modeled over 12 months.

Lowest modeled cost$16,800.00

$3,400.00 spread between lowest and highest modeled cost.

Weight total100

Weights do not need to total 100; the calculator normalizes them.

Ranked vendors
1Vendor A77.8
2Vendor B71
3Vendor C71
How to read it

The score is a vendor-screening aid, not procurement approval. Check security, contract terms, data ownership, implementation capacity, compliance, and exit cost before signing.

Planning comparison only. Scores reflect your assumptions; check uncertainty, dependencies, constraints, and strategic fit before deciding.

Formula

Vendor comparison score formula

Score = weighted average of feature fit, support, low integration effort, low risk, and normalized low cost

Lower integration effort, lower risk, and lower modeled cost improve the weighted score. Cost is normalized across the vendors entered.

How to use

Steps

  1. Enter the comparison horizon in months.
  2. Set weights for feature fit, support, integration effort, risk, and cost.
  3. Add each vendor's monthly cost, setup cost, and 1-to-5 scores.
  4. Review the ranked vendors and check the tradeoffs before procurement.

Example

Sample calculation

Top vendorVendor A
Weighted scoreAbout 78 / 100
Modeled cost$16,900 over 12 months

Calculator use

Best for

  • Comparing options with the same criteria and explicit estimates.
  • Discussing trade-offs with a team before committing capacity.

Before relying on it

Check first

  • Treating estimated scores as verified evidence or an automatic decision.
  • Changing criteria between options or overlooking dependencies, risk, and strategic fit.

Details

What to know before using the result

Cost horizonSetup plus monthly cost

Use the same comparison period for every vendor so setup fees and subscriptions are comparable.

Fit and supportScored 1 to 5

Feature fit and support are positive scores. Higher is better.

Effort and riskInverted scores

Higher integration effort or higher risk reduces the final score because those are cost-style criteria.

Benchmarks

How to read the result

80+: Strong candidate.

Often worth deeper diligence if contract, security, and implementation assumptions hold.

60 - 80: Compare tradeoffs.

Usually needs a clearer discussion about fit, implementation, risk, and cost sensitivity.

Close scores: Use tie-breakers.

When scores are close, review contract terms, data ownership, security, exit cost, and adoption risk.

Calculator accuracy

Methodology and assumptions

Formula, inputs, limitations and review record
Formula

Score = weighted average of feature fit, support, low integration effort, low risk, and normalized low cost

Inputs used

Comparison months, Feature fit weight, Support weight, Integration effort weight, Risk weight, Cost weight, Vendor monthly costs, Vendor setup costs, Vendor fit and risk scores

Limitations

These comparisons organize the estimates you enter. They do not verify evidence, resolve dependencies, or make the operating decision for you.

Review record

Catalog QA baseline on June 6, 2026. This date marks the catalog-wide automated and editorial QA baseline, not a tool-specific expert review.

Cite this page

Toolkit Shelf. Vendor Comparison Calculator. https://toolkitshelf.com/tools/vendor-comparison-calculator

FAQ

Common questions

How do I compare vendors fairly?

Use the same time horizon, include setup and monthly costs, score each vendor against the same criteria, and separate cost from fit, support, integration effort, and risk.

Should the cheapest vendor always win?

No. A cheaper vendor can still be worse if feature fit, support, integration effort, risk, lock-in, or switching cost makes the total decision weaker.

What should I include in vendor risk?

Consider security, compliance, data ownership, uptime, contract lock-in, pricing changes, migration difficulty, roadmap risk, and exit cost.

Can I use this for software vendors?

Yes. It is built for software and service vendor comparisons where monthly cost, setup, feature fit, support, integration, and risk all matter.