The best Cleanfox alternative
Cleanfox cleans your inbox for free and asks nothing in return, which is the part worth pausing on. Here is where the money comes from, and what the paid alternative looks like.
| in-boxed | Cleanfox | |
|---|---|---|
| Business model | ✓ One-time €4.99 payment | Free, funded by e-commerce data |
| Publisher | ✓ BonDigital, Netherlands | NielsenIQ, formerly Foxintelligence |
| Reads email content | ✓ Headers only, never content | Extracts transactional data |
| Account required | ✓ None, not even an email address | Mailbox connection required |
| Where the scan runs | ✓ Entirely in your browser | On their servers |
| Data stored afterwards | ✓ Nothing, there is no database | Retained for market research |
Where the money comes from
Cleanfox is published by NielsenIQ, the company formerly known as Foxintelligence. On its own pages the publisher describes itself as specialising in e-commerce market research and says it produces and commercialises statistics on e-commerce activity. Cleanfox is the consumer-facing side of that: connect a mailbox, get it cleaned, and the transactional mail in it feeds the research product.
None of this is hidden and none of it is illegal. It is disclosed, it operates under the GDPR, and the data is described as anonymised. It is simply a trade, and it is worth knowing you are making it. The receipts in your mailbox are a detailed record of what you buy, and that record is what pays for the free clean-up.
The paid version of the same job
in-boxed does one thing and charges for it. The scan reads only the headers that carry unsubscribe information, never message bodies, subject lines or attachments, and it runs entirely inside your browser tab. Your mail and your access token never reach our servers, and there is no database in which anything could be kept.
That is not a promise about our intentions, it is a property of how it is built, and you can verify it: open your browser's network tab while the scan runs and watch where the requests go. There is also no account, not even an email address, so there is no profile to delete afterwards.
About the carbon argument
Cleanfox frames inbox cleaning as an environmental act, and there is something to it, though the emphasis is off. Deleting mail you have already received saves a small amount of stored data. Not receiving it at all avoids the sending, which is the larger cost. Whichever tool you use, unsubscribing does more than deleting, because it stops the next thousand emails instead of tidying the last thousand.
Questions
Why is Cleanfox free?
Cleanfox is published by NielsenIQ, formerly Foxintelligence, a company that in its own words produces and commercialises statistics on e-commerce activity. Cleanfox extracts transactional data from connected mailboxes to build that market research. The cleaning is free because the mailbox data has commercial value.
Is Cleanfox unsafe or illegal?
No. Cleanfox operates under the GDPR, discloses what it does in its privacy policy, and says the data it commercialises is anonymised. The question is not legality, it is whether you want your purchase history turned into a market research product in exchange for a free clean-up.
What does in-boxed do instead?
in-boxed reads only the headers needed to find unsubscribe endpoints, never message content, and does it entirely in your browser. Nothing reaches our servers, there is no database, and there is no account. It is funded by a one-time €4.99 payment rather than by anything found in your mail.
Does deleting emails help the environment?
Cleanfox frames inbox cleaning around carbon footprint. Deleting stored email saves a very small amount of energy; not receiving the email in the first place saves more, because the sending is the expensive part. Unsubscribing is the more effective action either way.
Based on information published on cleanfox.io and its publisher pages in August 2026. Cleanfox and NielsenIQ are trademarks of their respective owners and are not affiliated with in-boxed.
Pay with money, not with your mail
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