How I compared them
My comparison comes from using both tools at different jobs, not running a controlled benchmark. I’d separate what I noticed from what the plans allow, then check whether the cheapest tier actually lets me do the work.
For OneDrive for Business, write access is the first filter. RaiDrive’s free plan makes that service, SharePoint and Box read-only, although personal OneDrive, Google Drive, Dropbox and the listed file-transfer protocols are writable. If I can’t save back to my work account, the free price doesn’t settle much, which is my main caveat with RaiDrive plans.
Connection speed isn’t the whole calculation
I noticed RaiDrive leaning heavily on connection quality, and it doesn’t have caching to soften that dependency. I wouldn’t turn that observation into a speed ranking without comparable measurements.
Offline access changes the comparison more than an unsupported “faster” claim would. Smart caching and offline access are included in the free tier of ExpanDrive details.
Free still has constraints
RaiDrive Standard allows 8 drives, includes ads and limits support to its forum. ExpanDrive’s free tier is ad-free, covers up to 10 users or devices per year and relies on community support.
RaiDrive’s paid entry price is $1.84/month, but that assumes a 3-year commitment. I’d count the commitment alongside the monthly rate, especially when paying is what removes the work-account restriction.
Then I’d check the machines
RaiDrive supports Windows and Linux; ExpanDrive adds macOS. A Mac requirement rules out RaiDrive, but Linux alone doesn’t distinguish them.
I’d also weigh local storage and payment style. Files downloading only when opened, cloud-file encryption and a one-time license make the Mac-and-Windows alternative relevant to my comparison, though they aren’t performance measurements. Those are the reasons I’d also consider CloudMounter options.
Which constraint would decide it for your setup: writable work storage, offline access, or avoiding a subscription?