Online fax lets you send a digital document to a fax number without owning a fax machine. Receiving is a separate need: someone must have a fax number to which the sender can transmit. This guide explains both jobs and the costs to compare before choosing a service.
Onetime Fax charges $5 for up to 100 pages, then $0.05 per extra page, without a sending subscription. International sending uses the same starting price where the destination is supported. Check the current pricing page and the number in the send form before checkout. The form checks format, not provider coverage; ask help@onetimefax.com about the destination country before paying if you need a coverage check. For more detail, read How to Send a Fax Online.
If someone needs to fax a reply to you, get a dedicated number first and give it to the sender. Onetime Fax offers a US virtual fax number for $10 one-time for 30 days, or $10/month with automatic renewal. Incoming documents arrive as PDFs by email and are available when you sign in. Sending and receiving are priced separately.
Onetime Fax assigns an available US number at activation. Area-code selection and number porting are not available. If you already use a number with another provider, keep that account active until you have arranged any transition with them.
| Need | Often useful model | Compare |
|---|---|---|
| One or a few sends | Pay per send | Checkout total, page limit, destination support, and final status |
| Very short, low-stakes send | Free tier | Page and daily limits, branding, coverage, and confirmation |
| Receive replies | Dedicated receive number | Number term, renewal, access, and retention |
| Frequent office workflow | Subscription platform | Annual cost, included pages, users, storage, support, and overages |
A provider’s low per-page rate may still cost more if you pay for months you do not use. Conversely, regular sending or a shared inbox may justify a subscription.
On October 12, 2026, we opened the public send, signup, and pricing paths for five services in a desktop browser. We did not create accounts, pay, or transmit test faxes. These are observations about getting started, paired with the providers’ published terms; they are not delivery or reliability tests.
| Service | Public-flow observation | Published terms relevant to an occasional sender |
|---|---|---|
| FaxZero | The US/Canada send form is available without account signup. | Free: up to 3 pages plus cover, at most 5 faxes per day. Premium: $3.29 for up to 25 pages. Free sends require an email confirmation link before transmission; see its FAQ. |
| Dropbox Fax | The send flow starts with email or Google account signup. | Five free pages for new users do not renew. After that, pay as you go costs $0.99 for up to 10 pages, then $0.20 per extra page. A paid subscription is required to receive. |
| Fax.Plus | The free path leads to an account form asking for name, email, and password. | Its free plan includes 10 sending pages in total and no receive number. Paid-plan prices depend on billing term; the $6.99/month Basic price shown during this check was billed annually. |
| eFax | The Personal plan’s Get Started button leads to account creation. | The US Personal plan showed $18.99/month for 200 US/Canada pages and one number, with a separate $4.99 first-month promotion. |
| RingCentral | Its fax page presents the feature within RingEX and directs visitors to sales. | We did not find a comparable standalone fax-only checkout price in this public path. |
These prices were visible on US-facing pages on the check date and may change. Compare the checkout total for your document and destination. We have not tested these providers’ delivery times, failure handling, support, or security controls, so this table does not rank them on those factors.
Online fax services differ in upload protection, file retention, access controls, and the onward fax route. HTTPS on the upload page does not establish end-to-end encryption through the telephone network. Confirm the recipient number and who can access the destination machine or inbox. A delivery status reports transmission, not who read the document.
For regulated health information, do not assume any fax product is automatically suitable. The U.S. Department of Health and Human Services says a covered entity or business associate using a cloud provider to handle electronic PHI needs an appropriate business associate agreement and applicable safeguards. See Are Faxes Secure? for a more detailed checklist.
Need to send a document now? Start a one-time fax. Need a reply? Get a receive number.
No. Pay-per-send services are available. Onetime Fax charges $5 for up to 100 pages, then $0.05 per extra page.
No. You need the recipient's fax number. Buy a dedicated number only if someone needs to fax you back.
No. Covered entities must assess safeguards and any required business associate agreement with a provider handling electronic PHI.
Yes, when a provider supports the destination. The send form checks number format, not provider coverage. Ask support about the country before paying if you need a coverage check.
Check the final delivered or failed status. Payment or a queued transmission alone does not establish delivery.