Three AI ROI Calculators. Three Different Questions. Here Is How to Pick the Right One.
Most AI ROI calculators are not wrong. They are answering the wrong question for the moment you are in.
Not every AI ROI tool is built for the same job. Three of the most referenced options in enterprise AI programme management — Viksya's AI ROI Calculator, Mavvrik, and Evoya — each address a distinct moment in the AI programme lifecycle. Treating them as alternatives leads to using a monitoring tool to build a business case, or a licence comparison tool to justify board investment. Neither ends well.
The distinction that matters is not which tool has more features. It is which question you are trying to answer right now.
What Each Tool Actually Does
Viksya — The Approval Tool
Built for the moment a programme needs to justify investment to finance. NPV, IRR, payback period, benefit ramp curve, AI non-linearity adjustment, Conservative/Base/Aggressive scenarios, two-variable sensitivity analysis. The output is a print-ready Executive Summary formatted for CFO and board presentation. It answers one question: should we fund this, and can we defend that answer under scrutiny?
It does not track what a programme costs in production. It does not compare provider pricing. It is a pre-deployment investment appraisal tool. Use it for exactly that.
Mavvrik — The Monitoring Tool
Built for AI programmes already in production. Real-time telemetry across token costs, GPU compute, orchestration layers, and agentic workflows — the costs traditional FinOps misses. Per-project attribution so organisations with shared AI infrastructure can see which team or product is driving spend. Free. Built for engineering, finance, and product working together post-deployment.
It cannot build a business case. It has no NPV calculation or scenario modelling. Its job begins where Viksya's ends.
Evoya — The Provider Comparison Tool
Built for one specific decision: whether Evoya's pricing model is more cost-effective than OpenAI Team or Claude Team at a given team size. The Unlimited Light Users feature in Evoya's plans is the key differentiator the calculator surfaces. Free, instant, transparent.
It is not an enterprise investment appraisal tool. It answers a procurement question, not a programme finance question.
The three tools are not competing. They are sequential. A well-governed AI programme uses all three: Viksya at approval, Mavvrik from deployment onwards, Evoya at provider selection. The mistake is using a Phase 2 tool to answer a Phase 1 question — or assuming one tool covers the full programme lifecycle.
Why the Approval Stage Is Where the Wrong Tool Causes the Most Damage
Of the three moments — approval, monitoring, provider selection — the approval stage carries the highest consequence for picking the wrong tool. A poor provider comparison is recoverable. A poor monitoring setup is recoverable. A business case built on a framework that cannot survive a finance director's standard capital allocation questions creates a credibility deficit that persists through every subsequent governance conversation.
The specific failure: a programme team uses a simple ROI calculator — one that takes estimated savings, subtracts investment, and outputs a percentage — to build a case for a finance review where the questions are about NPV, discount rates, ramp-adjusted payback period, and scenario modelling. A simple calculator cannot answer those questions. It was not designed to. The result is a confidently wrong business case, which is harder to recover from than an honest one that acknowledges uncertainty.
Finance-grade business case discipline — cost model completeness, benefit ramp methodology, scenario modelling, CAPEX vs OPEX separation — is what the approval stage requires. That is precisely what the Viksya AI ROI Calculator was built to deliver.
AI ROI Calculator — Executive Excel Toolkit
Built for CFO approval. Not a rough estimate — a finance-grade investment case.
• NPV, IRR, 3-year and 5-year ROI %, payback period — auto-calculated from your inputs
• Benefit ramp curve built in — the adjustment most AI business cases omit
• Conservative / Base / Aggressive scenario modelling with AI non-linearity adjustment
• Two-variable sensitivity tables and a print-ready Executive Summary tab
• Microsoft Excel — compatible with Excel 2016 and above
→ Download the AI ROI Calculator
Frequently Asked Questions
Is Viksya's AI ROI Calculator a replacement for Mavvrik?
No. They serve different moments in the programme lifecycle. Viksya is a pre-deployment investment appraisal tool — it builds the business case for approval. Mavvrik is a post-deployment monitoring platform — it tracks what the programme is actually costing in production. An organisation running a mature AI programme should be using both, at different stages.
Can the Viksya AI ROI Calculator handle Agentic AI and Generative AI programmes?
Yes. The Programme Configuration tab allows selection of AI programme type, including Generative AI and Agentic AI. The AI non-linearity adjustment in the Conservative scenario and the benefit ramp curve are particularly relevant for agentic deployments, where adoption timelines are longer and the risk of an additional model development cycle is higher than in standard ML programmes.
When in the programme lifecycle should I use each tool?
Viksya before deployment — when building the investment case for approval. Mavvrik from deployment onwards — to track actual spend, identify cost anomalies, and monitor quarterly ROI against the original projections. Evoya at provider selection — when evaluating whether Evoya's pricing model is more cost-effective than OpenAI or Claude at your team size. The tools hand off sequentially; none of them overlaps with the others.
Is the Viksya AI ROI Calculator suitable for consultants working with enterprise clients?
Yes. The workbook is white-label by design — no Viksya branding is embedded in the calculation sheets. Management consultants and independent advisors can use it as a client-facing investment appraisal tool, customise the assumptions and scenarios per engagement, and present the Executive Summary tab directly in client board packs or investment committee materials.
References:
- Viksya AI ROI Calculator: https://viksya.com/ai-roi-calculator
- Mavvrik AI ROI Calculator: https://www.mavvrik.ai/ai-roi-calculator/
- Evoya AI ROI Calculator: https://evoya.ai/en/pricing/roi-calculator/