Cheap Fax Has a Trust Problem
Search for a cheap way to send a fax and you will find plenty of sites offering to do it for a dollar or two, or for nothing at all. Many of them share the same warning signs. There is no company name anywhere on the page. The terms link is missing, or points at a template someone pasted in years ago. The only contact detail is a web form. You are asked for your email address, your document, and sometimes your card, and you have no idea who is on the other end of any of it.
That matters, because a fax is rarely a trivial document. People fax medical records, signed contracts, tax forms, court filings, and visa paperwork. Handing those to an anonymous website to save two dollars is a bad trade.
So the useful question is not "what is the cheapest online fax service" but "what is the cheapest one run by a business I can actually verify". This post explains how to tell the difference in about three minutes, using public records that exist in almost every country, and then puts unofax through the same checks. Short version: $0.29 AUD per page including tax, no subscription, no account, and a registered business behind it whose details are published on the site and searchable on a government register.
What "Legitimate" Actually Means for a Fax Service
Legitimate is a vague word in marketing copy, so here is a concrete version. A fax provider is one you can reasonably trust when all of the following are true:
There is a named legal entity. Not just a brand: a company, trust, or sole trader with a registration number you can look up on a government register. A brand name on its own tells you nothing about who is liable when something goes wrong.
That entity is named in the terms and the privacy policy. If the terms of service never identify the party you are contracting with, you have no counterparty.
Payments run through a named, regulated processor. You should be able to see who handles your card details, and the answer should not be "the fax site itself".
The privacy policy says where your document goes and how long it stays. A fax service necessarily shares your document with a telecoms carrier. A policy that hides this is either careless or dishonest.
There is a real support channel and a stated position on failure. Faxes fail. Busy signals, dead lines, and mistyped numbers are routine. What matters is what happens next.
None of this is expensive to provide. Registering a business costs very little in most countries, and publishing your own details costs nothing at all. When a service does not do it, the omission is usually deliberate.
How to Verify a Business, Wherever You Are
Nearly every country runs a free public register of businesses, and looking a company up is the fastest way to separate a real service from a landing page. Wherever the provider is based, there is usually somewhere to check:
| Country | What to look for | Where to check |
|---|---|---|
| Australia | ABN or ACN | ABN Lookup (abr.business.gov.au), ASIC |
| United States | State entity number | Secretary of State register for the state of incorporation |
| United Kingdom | Company number | Companies House |
| Germany | HRB number | Handelsregister, plus the legally required Impressum on the site |
| France | SIREN or SIRET | Annuaire des Entreprises |
| Japan | Corporate number | National Tax Agency corporate number register |
| EU generally | VAT number | VIES VAT number validation |
The check is the same everywhere: find a registration number on the site, search it on the official register, and confirm the entity is active and its name matches what the site claims. If you cannot find a number at all, that is your answer.
Is unofax Legitimate? The Business Behind It
unofax is a trading name, not a company floating free of any owner. The operating entity is AWS, CYY & Co. Pty Ltd (ACN 686 116 245) as trustee for Mumu, Lulu & Co. (ABN 54 837 123 965), based in Melbourne, Victoria, Australia. That ABN appears in the footer of every page on this site, and the same entity is named in our terms of service and privacy policy as the party you contract with and the controller of your personal data.
If you are reading this from outside Australia: an ABN is an Australian Business Number, a registration number issued by the Australian Taxation Office and recorded on a public government register. It is the local counterpart of a UK company number, a German HRB entry, or a US state entity number. The ACN is the company number of the corporate trustee, the equivalent of a registered company ID.
You do not have to take our word for any of it, which is the point of a register. Search the ABN on ABN Lookup, run by the Australian Government, and you can see the entity name, entity type, whether the ABN is active, whether it is registered for GST, and the state it operates from. The ACN is searchable through ASIC, the Australian corporate regulator. Both are free and take under a minute.
Registration has practical consequences for you as a customer, not just paperwork for us. The $0.29 AUD per page rate includes Australian GST, so the price shown is the price charged and the emailed receipt works for expense claims. Australian Consumer Law applies to the service. And there is an identifiable entity, a stated place of business, and a support address, support@unofax.com, that reaches a person if you need to raise something.
Where Your Money and Your Document Go
The two things you hand over when you send a fax are payment details and a document. Both should be traceable to a named party.
Payments. Card payments are processed by Square AU Pty Ltd (ABN 38 167 106 176), a PCI DSS Level 1 certified processor. unofax does not store, access, or process full card numbers at any point. We accept Visa, Mastercard, American Express, JCB, Apple Pay, and Google Pay. If you prefer stablecoin, the service also accepts USDC through the x402 protocol at $0.20 USDC per page, with no account and no API key. How payment data is handled is set out on our payment security page.
Documents. Your upload is encrypted in transit with TLS and processed on infrastructure in the AWS Sydney region, which is ISO 27001 and SOC certified. Transmission is handled by an ISO 27001 certified, HIPAA compliant fax carrier that encrypts data at rest with AES-256. Documents are permanently deleted seven days after upload. The privacy policy names which third parties receive what, rather than compressing it into a vague promise about security.
When delivery fails. If a fax cannot be delivered, the system retries automatically, and if it still fails you are refunded in full without filing a claim. You can check any transmission on the delivery status page, and the full policy is under automatic retries and refunds.
Cheapest Among Providers You Can Verify
Here is the per-page economics for someone sending ten pages. Competitor figures were last checked in July 2026 from each provider's own published pricing and can change at any time, so confirm current terms before you choose.
| Service | Cost for 10 Pages | Subscription | Account Required |
|---|---|---|---|
| unofax | $2.90 AUD (about $2.06 USD) | None | No |
| eFax | From $18.99 USD per month | Monthly | Yes |
| MyFax | From $10.00 USD per month | Monthly | Yes |
| HelloFax | From $9.99 USD per month | Monthly | Yes |
| FaxZero | Free for 3 pages, or $3.29 USD per fax | None | Email required |
An honest caveat, because a comparison that concedes nothing is not worth reading. If you are sending three pages to a US or Canadian number and you do not mind an advertisement on the cover sheet and your email address on file, a free service will cost you less than we will. For a very long document, a flat per-fax price can beat a per-page rate. Our comparison of one-time fax services works through where those crossovers sit.
What we have not found is a cheaper per-page rate from a provider that names its legal entity, publishes a registration number you can verify, charges no subscription, requires no account, puts no advertising on your cover sheet, and delivers to more than 45 countries at one flat price. That is a narrower claim than "cheapest fax anywhere", and it is the one that matters when the document is a contract or a medical record.
Why Cheap Does Not Mean Cutting Corners Here
The reasonable suspicion about a low price is that something is being skimped on. Here the savings come from structure, not from quality.
There is no account system, so there is no login infrastructure, no password resets, and no stored customer profiles to secure. There is no sales team and no call centre. The service runs serverless, so it costs close to nothing when nobody is sending, instead of paying for idle capacity. There is no receiving side and no dedicated fax number leased per customer, and no bundled feature set most people never touch. Subscription providers are largely charging you for a standing fax number and a platform, whether you use them in a given month or not.
What is not skipped is the carrier. Transmission goes over the public telephone network through a certified carrier using T.38 fax over IP, with automatic retries on busy lines, standard and fine resolution modes, and transmission confirmations you can rely on as proof of sending. The price is low because the business is narrow, not because the delivery path is cheap. Our breakdown of per-page fax pricing covers the numbers in other currencies.
A Three-Minute Checklist for Any Fax Provider
Run this before you upload anything sensitive, to us or to anyone else.
1. Find the legal entity. Look in the footer, the terms, and the privacy policy. If no company name or registration number appears anywhere, stop there.
2. Look the number up. Use the register for the country the provider operates from, as listed in the table above. Confirm the entity is active and the name matches what the site claims.
3. Read who touches your document. The privacy policy should name the payment processor, the hosting provider, and the fax carrier, and state how long files are kept. Vagueness here is the strongest single signal to walk away.
4. Check the payment page. Payment should be handled by a recognisable processor over HTTPS. If a site asks you to email card details or pay by bank transfer, it is not a business you want.
5. Find the failure policy. What happens when the fax does not arrive? A service with no answer to that has not thought about the part that matters most.
6. Check the cover sheet. Free services commonly stamp their own advertising across the top of your fax. Fine for a note to a friend, awkward on a legal filing. Ours carries a small unofax.com line and nothing else, and the cover sheet is free on every fax.
Send One and See
Everything above is checkable before you spend anything: read the terms, read the privacy policy, search the ABN on the government register, and look at who processes the payment. Then upload a document, enter the number, pay $0.29 AUD per page, and get a delivery confirmation by email. No account, no subscription, nothing to cancel. Send your fax at unofax.com, or read more about why people choose unofax.