Short answerSame territory, opposite approach:
- OnyX (by Titanium Software) is a free toolbox. It exposes macOS's maintenance scripts, cache cleaners, and hidden settings — all the knobs, for you to run yourself. Great if you know which one you want.
- Noah starts from the symptom. You say what's wrong; it finds the cause and turns the right knob with your OK — no need to know what a maintenance script is. Diagnosis is free.
Comfortable under the hood and want it free? OnyX. Want to describe the problem and have it handled? Noah.
| Noah | OnyX |
|---|
| What it's for | Finds and fixes the problem you describe | Manual maintenance + hidden-setting tweaks |
|---|
| Who it's for | Anyone — you describe it in plain English | Technical users who know which tool to run |
|---|
| How it decides | Noah finds the cause, proposes the fix | You choose the script or setting to run |
|---|
| Changes to your Mac | Shown first, done only with your OK, logged | You run the tools yourself |
|---|
| Pricing | Diagnosis free · $29 one-time or $79/yr | Free |
|---|
| Platform | Mac (Windows & Linux emerging) | Mac |
|---|
The real difference
OnyX hands you the whole toolbox: maintenance scripts, cache and log cleaners, database rebuilds, disk checks, and dozens of hidden macOS settings. It's free and powerful — but it assumes you already know which tool fixes your problem. Pull the wrong lever and you can cause the very slowdown you were chasing.
Noah goes the other way. You describe the symptom; it runs its own read-only checks, names the likely cause, and turns the one right knob — with your approval. You don't have to know what a maintenance script is.
Control
OnyX runs what you tell it to. Noah never acts on its own: every action is a hand-built tool with a fixed scope, shown to you first, done only on your OK, and logged — so a wrong move is visible and reversible.
Which to pick
OnyX if you're technical, want it free, and like running maintenance by hand. Noah if you'd rather describe the problem than pick the tool — and want the change explained and gated behind your OK.
Try Noah freeA Mac that just works.
Just tell Noah what's wrong:
My Mac's been really slow.
Frequently asked questions
Is Noah an OnyX alternative?
For getting a problem fixed, yes — but they're built for different people. OnyX gives a technical user every maintenance tool to run manually. Noah figures out which one your problem needs and runs it with your approval, so you don't have to know the internals.
OnyX is free — why pay for Noah?
OnyX is free because you do the diagnosing. Noah's diagnosis is free too; you only pay — a one-time $29 — when you want it to apply the fix for you instead of hunting for the right tool yourself.
Is OnyX safe?
OnyX is a long-standing, respected tool — but it exposes powerful settings, so the risk is running the wrong one. Noah limits itself to hand-built tools with a fixed scope, shows each change first, and logs it.
Can Noah run maintenance scripts and clear caches like OnyX?
Noah does those things when they're the fix for your symptom, rather than as a menu you run blind. It clears caches or runs upkeep only when that's the cause — and always with your approval.
OnyX is a trademark of Titanium Software; this page is an independent comparison and isn't affiliated with or endorsed by them. Product details change — check their site for current features.