biz59Free tools
Small tools for people building and running software businesses. They run in your browser; nothing you type is sent to us.
AI prototype launch checklist
Seventeen yes-or-no checks before an AI-built app gets real users: access rules, keys, server checks, limits, backups and ownership. Score and printout.
Revenue per employee and margin calculator
Revenue per head next to gross margin, with your model and hosting costs counted, against SaaS Capital, AWS and Bessemer benchmarks.
Support bot real cost calculator
Cost of a ticket that is actually resolved, with and without a bot: hand-overs, customers who come back, refunds and fees counted, with the break-even resolution rate.
One-page developer brief builder
Nine short sections a developer or a coding agent can build from. Flags adjectives and lines that can't be tested; copy, download or print the page.
EU AI Act transparency quick check
Eight yes-or-no questions: provider or deployer for each feature, the Article 50 duties with their dates, and a one-page answer for customers.
Agent-ready check for a SaaS product
Twelve yes-or-no checks: can an AI assistant read your docs and prices, sign up and call your product, and is it safe when it does? The order to work in, and a printout.
Code review take-home builder
An interview exercise for a junior developer: a short change with two planted faults, a marking sheet and questions to ask aloud. Python or TypeScript; access, money or import.
Billable unit comparison
One support month priced per seat, per action, per conversation and per resolution: the bill under each, how it moves when the bot gets better, and eight questions for the vendor's definition.
Model hosting break-even calculator
Pay per token, rent a GPU or buy one: the monthly cost of four options at your volume, the break-even, and what a million tokens costs at the machine's real use. Every price editable.
Security baseline self-assessment
The 25 Minimum Viable Secure Product controls as yes, partly, not yet or not applicable, with a note and a date each: a dated page to attach to a security questionnaire, a work list and honest wording for a not yet.
Code review load calculator
The hours of careful review a week of merged changes needs at 400 lines an hour, the gap against your reviewers' time, which changes to split, and a one-page review routine to print.
Price increase calculator
Raising prices on customers you already have: the new monthly revenue per plan, how many could leave before it loses money, and raising now against grandfathering or a lock-in offer over a year.
AI feature margin calculator
What an AI feature costs per customer: the cost of one use, gross margin for light, normal and heavy users, and what caching, a cheaper model and a cap or overage price do to it.
Outage update writer
Status page text for each phase of an outage, a customer email, a short post and a one-page write-up outline, with a time zone on every time and a line about data.
AI use policy builder
A one-page AI policy for a small team: approved company accounts, the data that never goes in, a person checks what leaves, new tools and mistakes; to copy, download or print.
Revenue-based financing calculator
What a revenue-share or ARR advance offer really costs: months to repay, what is due at maturity and the effective annual rate at five growth rates, next to a bank loan.
AI receptionist cost check
An AI voice agent, a human answering service, a part-time receptionist and the calls you miss today on one monthly bill: plan fees, hang-ups, bookings lost and the break-even.
Trial or free plan calculator
Free plan, trial with or without a card, or a reverse trial from the same visitors: paying customers, what free and trial users cost in AI and hosting, cost per paying customer and revenue after 12 months.
Software spend check
Every subscription the business pays for: the yearly total, money on empty seats and on tools that do the same job, tools nobody owns, and a renewal calendar with cancel-by dates to download.
Recording consent check
Where is everyone on the call, and is an AI notetaker on it? Whether one person's consent is enough or everyone must agree, the state law and penalty, and the words for the invite and the start of the call.
Cyber insurance application check
The 15 questions on a small-business cyber application that decide the quote: which answers stop it, which shrink what the policy pays and which only raise the price, with the fixes in order and their time and cost.
Payment rule builder
Your bank, team size and payment sizes in; one page out: who approves what, the call-back on new bank details, a code word, the bank setting to switch on and a letter telling suppliers about the one-day hold.
Sales tax nexus check
Revenue and payments by US state, typed, pasted or from a Stripe export: each state's threshold and period, whether it taxes SaaS, how close you are, and which registrations come first.
Store-ready check
Will Apple or Google Play send your app back over its privacy, support or delete-account links? Six questions and your links.