Differential Factor BvB
Stop guessing. Calculate build vs. buy in 60 seconds
Differential Factor BvB launched on June 8, 2026 with 3 votes, #6,658 of 22,647 launches that month and more than 50% of that year's launches.
What it does
Every company faces the build vs. buy question. Most teams guess. A few make spreadsheets. Almost nobody does it right. This calculator models the real TCO over the term of your agreement — license costs, implementation, engineering headcount, AI-assisted build velocity, app criticality, and more. Adjust the parameters, see the numbers update in real time, and get a clear recommendation. Free to use.
Free build vs. buy calculator for SaaS decisions. Compare the 3-year total cost of ownership of building custom software (including AI / vibe-coding velocity) against buying vendor SaaS, and get a clear build-or-buy recommendation.
This tool is for teams evaluating a SaaS purchase or renewal who need to assess the feasibility and long-term total cost of ownership of building the capability in-house. Adjust the parameters below to model your total cost of ownership and get a strategic recommendation. Output tokens cost 3–5× more than input. Generation-heavy workloads increase token spend significantly. Side-by-side 3 -year TCO for vendor purchase vs proprietary build. Build estimate assumes 5× velocity via AI-assisted development. Saves your inputs and produces a summary analysis. Add your email if you want a copy in your inbox. Quick answers to the questions behind every build-or-buy software decision. It depends on…from bvb.differentialfactor.com
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