Business · guides
Accounting software, CRM and project tools
By Alberto Gulotta · Updated · 5 min read
This is the entrance to the business tower. Accounting software, somewhere to keep customers, something to manage the work, and a way to send email that is not your own mailbox.
The tower is written for a specific reader: one person, or a very small team, choosing tools for the first time and paying for them personally. That matters, because almost everything published in this field is written for companies with a procurement process, and the advice is different. A feature that is essential at two hundred employees is dead weight at two.
Every floor will therefore lead with the same three questions. What does it cost when the discount ends? What happens to your data if you leave? And is the free tier a real product or a fourteen-day corridor into a paid one? Those decide more small-business outcomes than any feature comparison, and they are the questions the vendors answer least clearly.
The accounting wing carries an additional caution, and it will be repeated on every floor in it. What your business is legally required to record, keep and submit is set by the country you are in, it is not a software question, and no page here substitutes for an accountant. These guides describe what the tools do; they do not tell anybody what their obligations are.
Customer records, project tracking and email marketing are less regulated and more forgiving. They are fields where the free options are genuinely usable for a long time, and where the most common mistake is buying too much too early. Only the last of the three has a guide here today, and the boxes below say so rather than implying otherwise.
Three levels are planned, and you are on the first. Three guides exist so far — writing an invoice, keeping records, and consent for business email — and they are linked below. The rest of the map is written out here as a plan: as each floor arrives it will cover one subject completely and hold the shorter guides underneath it, and nothing will be more than three clicks from the front door.
Where to start
Five ways in. Most first-time readers need the first and then the third.
- “I need to send invoices and track what I am owed.”
- Start at money
- “I want to email my customers properly.”
- That is reaching people
- “What must appear on the invoice itself?”
- The published list is in Invoice generator
- “How long do I have to keep the copies?”
- Two tax authorities answer that in How long to keep business records
- “I need the numbers to add up in a spreadsheet.”
- Start with How to calculate percentage in Excel
Money
Invoicing, accounts and getting paid. This is the wing with legal weight, the one where the cost of choosing badly is measured in an accountant’s hours rather than in a subscription.
Reaching people
Email marketing and the rules attached to it. The guide on consent is written already, because sending business email to people is a regulated activity nearly everywhere.
Not covered here. It will not tell a sole trader to buy enterprise software. Most of what ranks for these searches is written for companies with procurement departments, and applying that advice to a one-person business is how people end up paying monthly for capability they will never use.
It will not give tax or legal advice. The accounting guides describe what tools do and stop there; what you are required to record and submit depends on where you are and belongs to an accountant.
It will not rank these tools yet. Business software has to be lived with — through a month end, through a support request, through an export — and a verdict before that is just a rearranged feature list.
And it will not carry affiliate links. Business software pays the highest recurring commissions in the entire industry, which is exactly why the recommendations here have to be free of them.
A closing note on sequence, because the order of these decisions matters more than the decisions themselves. Start with the tool that has a legal deadline attached to it, which is the accounting one, and set it up properly before anything else. Then add whatever removes the thing currently costing you the most hours. Everything else can wait, probably for a year, and often forever. The most common pattern this tower is written against is a new business subscribing to five services in its first month, using two of them, and discovering at renewal that the introductory prices have all ended at once. What holds instead is simple: every floor will answer what it costs at renewal and what happens to your data if you leave.
Written by Alberto Gulotta
Founder and editor of AI Tools Primer, writing from Palermo, Italy. Thirty-five years of taking computers apart, starting with a Commodore 64 — the long version is on the about page.
Something wrong on this page? Write to aitoolsprimer@gmail.com and it gets fixed.
Written on 20 August 2026 · last checked 9 September 2026.
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