Par avion · Private beta
Change clouds without downloading a terabyte first.
Flitterby copies your folders straight from one provider into another. Nothing lands on your machine, and nothing is stored on ours. When a transfer finishes there is no copy of your file to delete, because there never was one.
Request an invite Private beta. One email, no newsletter.
Works with
- Dropboxsource & destination
- Google Drivesource & destination
- S3-compatibleR2, B2, Wasabi
- OneDrivein progress
What it costs to send
Prepaid, by the terabyte
- 100 GB Free on sign-up, to try it on your own files Free
- 5 TB $3.00 per TB $15
- 15 TB $1.67 per TB $25
- 30 TB $1.30 per TB $39
You buy transfer, not a migration, and you spend it down. Copy a folder today and the rest of the credit is still there in March for the next one. Most people move their files in several goes rather than one, because picking what moves is the point of the thing, and being charged again each time you use it would be a strange way to sell it.
Only what arrives is deducted. Credit comes off as bytes land at the destination, so a file that fails costs you nothing and a copy you stop halfway only spends what it actually moved.
It does not expire, and there is no monthly plan to forget about. Buy more when you run out. Need more than 30 TB at once, or moving on behalf of a company? Ask us.
Nothing is charged during the private beta. These are the prices for when it opens, published now so nobody is surprised by them later.
What your provider may charge to send it
Not our bill, but your problem
Flitterby does not charge for bandwidth. Your providers might, and it is usually charged on the way out. Reading a file is egress, and a migration reads every byte exactly once, so any bill of that kind lands with whoever you are copying from, not the destination.
Object storage is where this shows up. Amazon S3, Backblaze B2, Wasabi and similar services each price egress differently, and some also charge per request, which scales with how many files you have rather than how large they are. A few add minimum retention or storage-class rules on top. Google Drive and Dropbox do not charge for this at all: their limit is rate, not money.
The numbers are the provider's to set and to change, so we are not going to quote them at you and be wrong later. If you are unsure, check your provider's pricing before starting a large transfer. It is a five-minute answer that is much cheaper found beforehand than on the next invoice.
What a transfer records
Every copy, not a sales figure
Transfer record
Kept per file, for every copy
Source
Dropbox
- files read
- counted
- bytes read
- measured
- access
- read only
In transit
Flitterby
- retained
- 0 bytes
- on disk
- nothing
- chunk size
- up to 64 MiB
Destination
Google Drive
- files written
- counted
- bytes written
- measured
- full-pass checksum
- matched
- resumed
- verified by size
A file that goes past in one pass is hashed on the way and checked against what the destination reports, end to end. A resumed file never saw its earlier bytes, so it is verified by size instead, and we record which of the two it got rather than claiming the stronger one for both.
What we ask each provider for
And what we deliberately do not
Dropbox
files.content.read files.content.write files.metadata.read account_info.read
Read the files you choose to copy, and create the copies you ask for. Flitterby is never granted permission to delete or overwrite: a copy into a folder that already holds a file of the same name lands as a new “name (1)” rather than replacing anything.
Google Drive
drive
Google's drive scope is broad. Flitterby uses it only to read the files you
choose to copy and to create the copies you ask for, whether Drive is the account you are
copying from or the one you are copying into. It never deletes or overwrites anything.
Your passwords
Never requested, never seen
Connections are made through each provider's own authorization screen. You can revoke Flitterby from your provider's security settings at any time, which cuts off access immediately. Full privacy policy.
What Flitterby cannot do
Stated plainly, before you rely on it
There is no iCloud Drive support
Apple provides no way for a service to read iCloud Drive on your behalf. Anything claiming otherwise is using something unofficial. We would rather say so than imply we have it.
Provider limits govern the pace
Google documents a limit of 750 GB uploaded per user per day, for Workspace accounts. It is not published for personal accounts, and we cannot tell which you have, so we assume it applies to everyone. A very large migration therefore takes days, and Flitterby tells you that before you start rather than after.
Google Docs are converted, not copied
Google Docs, Sheets and Slides have no underlying file to copy, so when Drive is the source they are exported to Office formats (.docx, .xlsx, .pptx). The conversion is Google's own and imperfect, and Google caps a single export at 10 MB, so a very large document is flagged rather than truncated.
It is early software
Flitterby is in private testing. Keep your own backups, and verify an important migration before you delete anything at the source.
Get an invite
No newsletter, no marketing
Flitterby is in private testing. Leave your email and we will get in touch when a slot is free.