Office suites comparison: a side-by-side buyer guide

Put two suites side by side and the columns will mostly agree. Both write documents, both do spreadsheets, both have slides, both support comments. The grid says they are the same product at different prices, and the grid is missing the thing that actually separates them.

What separates them is what a document is in each arrangement, and where the authoritative copy lives. That one difference propagates into backup, sharing, offline work, interoperability, and how expensive it will be to leave. Compare on that first, and the feature rows become a tiebreak rather than the decision.

What to take away

• Ask what the unit of work is: a service hosted document, a file kept in sync, or a file on storage you control. The answer changes almost everything downstream.
• Compare the seams. Most of the friction in daily use happens where the suite meets identity, storage, and everything you already run.
• Ask each administrative question three ways. Vendors use different words for the same capability and the same word for different ones.
• Test one document going out to an outsider and coming back. That single trip exposes more real difference than a page of comparison rows.

Three arrangements, not three products

The document lives in the service. There is no file until you ask for one. Version history, comments, and simultaneous editing are properties of the service rather than of a document, which makes them excellent. Backups are the provider's model rather than yours, exit means an export and a conversion, and anything that reads files directly needs a translation step.

The file is the unit, kept in sync. A real file exists on disk and the service distributes it. Anything that reads files works normally, backup can be your own, and offline work is straightforward. In exchange, simultaneous editing is harder, conflicts are a genuine event with two copies to reconcile, and version history is usually thinner.

The file is the unit, on storage you run. Full control, full responsibility. Everything is your problem, including availability, backup verification, and the collaboration features you now do not have. Legitimate for organizations with a specific requirement and a person to own it, and expensive for anyone choosing it by instinct.

Most offers are one of these with borrowed features from another. The useful question during a comparison is which one it is underneath, because that is what it will behave like on the day something goes wrong.

Arrangement	Strong at	Weak at
Document lives in the service	Live collaboration, history, sharing control, nothing to install	Working offline, tools that expect files, exit
File kept in sync	Compatibility, your own backups, offline, large local files	Conflicting edits, weaker history, sharing is coarser
File on your own storage	Control, no vendor dependency, data location certainty	Everything is your responsibility, and collaboration is the weakest

Compare the seams

The applications are the part you look at. The seams are where the work actually gets stuck. Where an offer describes itself in loose terms, the standard definitions of cloud service models help you decide whether two candidates are even the same kind of purchase.

• Identity. Whether accounts come from the directory you already run, whether provisioning is automatic, and what happens to documents when an account is disabled. A suite with its own separate user list is a second thing to administer forever.
• Storage. Whether the suite's storage is the organization's storage or a second place files live. Two document stores is a permanent tax, and it is how you end up not knowing which copy is current.
• Mail and calendar. Whether they come from the same place, and what breaks if you decide later that they should not.
• Meetings and chat. Usually included, frequently adequate rather than good. If you will keep a separate product for these, the bundle is worth less than the price list suggests, which is exactly the arithmetic the cost model is for.
• Everything else you run. The finance system that produces reports, the tool that generates proposals, the thing that publishes documents to your website. Each one is a connection, and each is a small project when it breaks.

For each seam, ask what happens if you change that component later. A suite that makes every seam a one way commitment is not cheaper; it is a decision about the next five years disguised as a purchase.

For the questions about separation, resilience, and who at the provider can reach your data, the cloud security principles work well as a ready made agenda that any supplier should be able to answer without a specialist.

Ask administrative questions three ways

Administrative capability is where comparisons go wrong most often, because the vocabulary is unstable. Do not ask whether a product has a named feature. Describe the situation and ask what happens.

• Not "is there an audit log", but: someone claims a document was changed last Tuesday. Show me how I would find out who changed it, and tell me how far back that goes on this tier.
• Not "can we control sharing", but: I want nobody to be able to share outside the organization except one team, and I want to see everything currently shared outside. Show me.
• Not "is there retention", but: I need documents in this space kept for a defined period and then removed, and I need one project put beyond deletion during a dispute. Show me both.
• Not "can we recover deleted files", but: a folder with four hundred files was deleted eleven days ago. Restore it, with its sharing intact.

Ask the same four of every candidate and record the answers verbatim. The differences will be large, and none of them would have appeared in a feature grid. The full set of feature checks works the same way, on the application side.

The trip that reveals the difference

Comparisons in this category are settled by interoperability, and interoperability is best measured with one deliberate exercise.

Take a real document with structure in it: headings, numbering, a table, a footnote, a chart, a tracked change, and a comment. Send it to somebody outside the organization who uses a different arrangement. Have them edit it properly, including adding a comment and a change of their own. Get it back. Open it. Then send it out again and get it back a second time.

Record what was lost on each trip and whether the losses accumulated. Do this for every candidate with the same document and the same outside contact, and you have the only genuinely comparable evidence in your whole evaluation. The failure points to look for are set out in the suite overview, and the point of doing it twice is that damage in this category is cumulative rather than immediate.

Breaking a tie honestly

If two candidates survive all of that and remain close, they are close, and there is no hidden fact that will separate them. Break the tie in this order:

1. The easier exit. Everything else can be lived with; a bad exit compounds. The portability audit gives you this answer directly.
2. What your people already know. Real money, concentrated in your most productive staff.
3. The seam you are most likely to change. Prefer the suite that leaves that decision open.
4. Which one the administrator would rather run. They are the person who will spend the most hours in it.

Then write down what you chose, what you gave up, and what would make you revisit. Two years on, that note converts a renewal into a short check instead of a repeat of the entire exercise.

Common questions

How many candidates belong in the comparison?

Two, three at most. Beyond that the exercise stops being a decision and becomes a survey. Use disqualifying requirements to cut the field before comparing anything.

Should we compare on price at the start?

No. Price entered early anchors every judgment that follows. Establish which candidates could actually do the work, then price only those, in your own units.

What about running a mixed estate deliberately?

It is common and it is workable, provided somebody decides which arrangement holds the authoritative copy and which class of work happens where. Undecided, it produces two subscriptions and permanent confusion about which version is current.

Does any of this change if we are very small?

The seams matter less, because you have fewer of them, and the exit still matters exactly as much. A team of four should spend an afternoon on this rather than a fortnight, and should still run the export test and the rollout decisions before committing.