The short answer
On monthly fees, a best-of-breed stack usually looks cheaper. It stops looking cheaper once you count integration work nobody has time to do, one privacy accountability obligation per vendor, and the records risk when a tool disappears. Suites win on connection; specialists win on depth.
Every article on this subject opens by comparing subscription prices, which is the easy number and almost never the one that decides the outcome. A small business rarely fails at software because it picked the more expensive option. It fails because it bought six things that do not talk to each other and then spent three years copying data between them by hand.
So this is a comparison of the costs that are actually load-bearing.
What the two approaches really mean
Best-of-breed means choosing the strongest product in each category and connecting them. It is the default advice in most business software writing, and for organizations with technical staff it is usually correct.
All-in-one means one application covering many functions. Deep integration, uniform interface, and inevitably some modules that are weaker than the market leader.
Modular suite is a third shape and the one most often mis-described. Separate applications, switched on individually, billed individually, but sharing an account and a data layer. You get the connection without adopting everything and without an integration project.
The cost nobody puts on the spreadsheet
Here is the assumption buried inside best-of-breed advice: that somebody will do the integration work. Connect the booking tool to the invoicing tool. Sync the contact list. Fix it when a vendor changes an API. Reconcile the two systems that disagree about a customer's address.
In a company with an IT department, someone owns that. In a company where the owner is the IT department, nobody does. The work is not done badly — it is not done at all. The tools stay disconnected forever, and the gap gets filled by a person retyping information from one screen into another.
That labour is invisible on every invoice you will ever receive, which is exactly why it is underestimated. Fifteen minutes a day of copying data between systems is not a rounding error for a business of five people; it is a meaningful share of somebody's week, spent producing nothing.
This is not a hypothetical population. As of December 2023 there were 1.10 million employer businesses in Canada, and 1.07 million of them — 98.1% — were small businesses of one to ninety-nine employees [1]. The overwhelming majority of Canadian employers are in exactly the position where integration work does not get done.
The test that settles it: look at your current tools and ask what integration work you planned to do last year and did not. That list is the real cost of best-of-breed for your business, and it is usually longer than people expect.
Every vendor is a compliance relationship
This one genuinely surprises owners, because it does not feel like a software cost.
PIPEDA Schedule 1, clause 4.1.3 makes an organization responsible for personal information in its possession or custody, including information transferred to a third party for processing, and requires it to use contractual or other means to provide a comparable level of protection while the third party processes it [2].
That obligation is per processor. If customer information sits in your booking tool, your invoicing tool, your email marketing tool, your support tool, your file storage and your CRM, you have six of these relationships, each needing its own contractual terms, its own understanding of where the data goes, and its own assessment of whether the protection is comparable.
The breach obligations compound the same way. Section 10.1 requires reporting to the Commissioner any breach of security safeguards involving personal information under your control where it is reasonable to believe there is a real risk of significant harm, as soon as feasible after you determine the breach occurred, and notifying affected individuals [4]. Section 10.3(1) requires keeping a record of every breach of security safeguards involving personal information under your control [4]. “Under your control” includes information sitting at a processor. More processors, more surface, more incidents you are answerable for.
Consolidating vendors does not remove any of this. It reduces the number of times you have to do it.
What happens when a tool disappears
Software companies get acquired, pivot, raise prices sharply, or shut down. For a small business the question is not whether that happens but what it costs when it does.
The records obligation is unmoved by your vendor's fortunes. The Income Tax Act requires every person carrying on business, and every person required to pay or collect taxes, to keep records and books of account at their place of business or residence in Canada or another place designated by the Minister, in a form and containing information that will enable the taxes payable to be determined [3]. Those records must be retained until six years from the end of the last taxation year to which they relate [3]. And where a person required to keep records does so electronically, they must retain them in an electronically readable format for that retention period [3].
A folder of CSV exports is not obviously an electronically readable set of books and records in the sense that provision contemplates, and it is certainly not the same as a working system you can query. The more separate systems hold pieces of your financial history, the more of these exit problems you have queued up.
ISED's data gives a sense of the churn small businesses live inside: between 2017 and 2021 an average of 103,001 small businesses were created annually and 94,197 disappeared annually [1]. Your vendors are drawn from a population with that kind of turnover.
The administrative drag of many vendors
Six vendors means six renewal dates, six credit-card updates, six support relationships, six sets of user accounts to revoke when someone leaves, and six bills your bookkeeper reconciles every month.
If some of those vendors bill in US dollars, add currency conversion and the question of what tax was actually charged. The Excise Tax Act requires a registrant making a taxable supply to indicate to the recipient either the consideration and the tax payable in a manner that clearly indicates the amount of the tax, or that the amount charged includes the tax [5]. Canadian-billed software makes that plain on the invoice. Foreign-billed software often does not, and the difference lands on whoever does your books.
The offboarding case is the one with teeth. When an employee leaves, every system they had access to needs its account disabled. With one suite that is one action. With six tools it is six, and the one everybody forgets is the one that matters.
When best-of-breed genuinely wins
It would be dishonest to write this without the other side, so here it is plainly.
Choose the specialist when the function is central to how you make money and depth beats connection. A restaurant's reservation system, a clinic's practice management, a manufacturer's production scheduling — in each case a company has spent a decade on that one problem, and no suite module will match it. Losing capability at the core of your business to gain tidiness at the edges is a bad trade.
Choose the specialist when you have someone who can own integrations. If integration work will actually happen, the calculation changes completely, and best-of-breed becomes the stronger approach.
Choose the specialist when a regulatory or industry requirement effectively names the product. Sometimes the decision is already made.
When a suite wins
When the same customer keeps appearing in several systems. That is the clearest signal, and it is the case a suite is built for.
When your stack accumulated by accident — a tool per problem, added over five years, none chosen against the others. Consolidation is usually a cost reduction and a time reduction at once.
When nobody will maintain integrations, which for most businesses under twenty people is simply true.
And when the last ten per cent of features in each category is worth less to you than one vendor, one bill and one place to look when something breaks.
The practical answer
Most small businesses end up somewhere in the middle, correctly. Keep the one or two specialist tools that are genuinely central to your trade. Consolidate the ordinary operational layer — contacts, invoicing, email, documents, scheduling, support — where the value comes from things sharing records rather than from any single tool being exceptional.
That is a defensible position, and it is a more useful conclusion than declaring either approach the winner. The question is not which philosophy is right. It is which of these costs your business is actually going to pay.