Fluid

What Fluid is

Fluid is a private AI assistant for Mac that runs locally. It uses an open model on your own machine, which means it works without a network connection and your conversations never leave your computer.

It is a local Mac assistant, not a cloud service. The appeal is that nothing is transmitted, so a user with confidential material works without a data-handling question, which suits someone with genuine privacy requirements.

The privacy claim is the entire product, because every mainstream assistant processes your text on someone else's servers and this one does not.

What you can do with it

You chat with the model on your own machine, so it works offline, which is genuinely useful on a plane, on a restricted network, or anywhere you cannot or should not send data out.

Because conversations stay on your machine, the data-handling question disappears, and the offline operation is the part that suits restricted environments, which is the difference from a hosted assistant that needs connectivity. For a Mac user with confidential work, that is the point.

It is built for one platform, so the environment is fixed.

Who it is for

It suits Mac users with genuine privacy requirements.

It suits users who need to work offline.

What to keep in mind

A local model is a smaller model, because whatever runs on your laptop will be less capable than a large hosted one, so expect weaker reasoning and more mistakes on anything demanding.

Hardware sets the experience, because memory and processor determine what you can run and how fast, and older machines will struggle. It is Mac only, so it will not follow you across platforms. Privacy is only part of security, because local storage keeps your data off someone else's server while your machine still needs protecting, and local is not the same as safe.

A practical point: the capability trade is real, so decide whether the privacy requirement justifies it before you rely on the output for anything demanding. Confirm the price, and check the hardware requirement.

Two practical points

confirm the price and check the hardware requirement, because Fluid runs an assistant locally on a Mac with conversations that never leave the machine, good for genuine privacy needs and offline work, but a local model is less capable than a hosted one, hardware sets the experience, it is Mac only, and local storage is not the same as secure. Test it on the machine you actually own before assuming the model will be usable, because the difference between a comfortable local model and a frustrating one is usually a hardware generation rather than a configuration choice. Decide whether privacy justifies the capability trade before you move a workflow onto it, because a local model is a real step down on demanding work.