The Best Online Fax Services, Compared

This guide compares ten services, using each vendor's own pricing and terms checked 14 October 2026. Annual equivalents are labeled separately from month-to-month prices. The SingleFax online fax service page explains our product; this article compares the alternatives too.

If you have one document ready, send a one-time fax. SingleFax guest sending costs $0 if delivery fails.

For a genuinely zero-cost task, start with the free fax service comparison. For regulated use, compare the lowest verified BAA plan and price rather than an ordinary consumer tier.

What is electronic faxing?

Electronic faxing sends and receives documents through an internet-connected service rather than a dedicated fax machine. You upload a file or submit it through an app, email or API; the service transmits it to the recipient’s fax number and returns a transmission result. A successful transmission does not establish that an agency accepted your filing.

Comparison table: prices, free pages and accounts

A free allowance can be the cheapest way to send a small document. After that, compare the transaction or subscription invoice. The cheapest entry plan is not necessarily the cheapest plan with receiving, multiple users or a BAA.

Sources: SingleFax, Dropbox help and plans, Fax.Plus, eFax, iFax, FaxZero, HumbleFax, FaxBurner, FaxItOnce and OneTimeFax. All checked 14 October 2026.

Pricing by monthly volume and number of users

Plan details as published on each provider's pricing page, checked 14 October 2026. Blank cells mean the page did not state it; confirm at checkout.

How to read it: under about ten short faxes a month, pay per fax usually costs less than any plan. Around 200 pages a month for one person, compare the single-user plans. For a team of five or more, compare plans that list multiple users and a shared page pool, and check the overage rate, since that decides what a busy month costs.

How we picked and compared

We compared published prices, billing commitments, page limits, registration, receiving numbers, failure handling and BAA availability. We checked live browser views where a pricing page's text did not show the billing term. For eFax, we also read the US page's published offer data because it can redirect visitors to a regional offer.

This is a comparison published by SingleFax. These links are ordinary vendor links, and the article has no affiliate referral codes. The evaluation does not claim an independent delivery benchmark, secret product testing, or a universal reliability ranking.

The practical criteria are straightforward. First, does the service support the receiving number's country? Second, does the whole packet fit? Third, what is the actual invoice, including annual billing, extra pages, cover counting and any required secure product? Fourth, can the recipient fax something back, if needed?

A maximum packet size and a monthly allowance answer different questions. A plan with 1,000 monthly pages may still limit the pages in one transmission. Likewise, ten free pages may be a one-time quota rather than ten pages every month. We identify those distinctions rather than treating all page figures as interchangeable.

For urgent or recurring work, try a representative non-sensitive document and inspect the received output. Make sure staff can locate the final result and route incoming documents correctly. A low price does not help if the workflow prevents the office from using the fax.

The ten services

1. SingleFax: occasional sending without a subscription

SingleFax's standard guest flow starts at $0.99 for up to 10 document pages, then about $0.08 per extra page, with a 100-document-page cap. It suits someone who needs a form, application or signed document sent a few times a year.

SingleFax captures payment only on successful delivery. Failed delivery costs $0, although a bank authorization can remain pending while the bank releases it. For destination details, see the pricing FAQ.

Receiving is separate: a free fax number for 24 hours has limits, a 30-day number costs $4.99, and company plans start at $7.90/month. A $97 lifetime number has specified included credit and usage terms; it is not unlimited lifetime sending. The HIPAA product is a separate secure flow with a BAA step.

To keep an existing number, SingleFax now offers free eligible US/Canada local port-in on Standard or Business, monthly or annual, including HIPAA Secure. Lifetime and 30-day plans do not accept port-ins. Port-out is $10 regular or $150 vanity, prepaid and fully refunded after confirmed failure or cancellation.

Choose SingleFax for a short occasional send and clear guest checkout. Compare longer packets with flat-rate alternatives, and compare ongoing receiving with subscriptions. See online fax services for one-time use for that page math.

For other subscriptions, see our MyFax review, MetroFax review and CocoFax review. For pay-per-page and free senders, see FaxSalad, PamFax, GotFreeFax and FaxBetter.

Switching an existing receiving number? Use the step-by-step fax number porting guide to check release details, prepare documents and avoid canceling too early.

2. Dropbox Fax: existing document-workspace users

Dropbox Fax, formerly HelloFax, gives a new account five free outbound pages, with up to twenty more earned through listed actions. After that, pay-as-you-go is $0.99 for the first ten pages and $0.20 per extra page.

The live monthly plan view lists Home Office at $9.99, Professional at $19.99 and Small Business at $39.99 after introductory promotions. Their allowances are 300, 500 and 1,000 monthly pages, with $0.05 subscription overage per sent or received page. Do not confuse that overage with the PAYG extra-page rate.

It suits recurring cloud-document and team workflows, especially if registration is already part of your work. An account is required. Dropbox's July 2026 audited-features document lists HIPAA support as No for Fax; a BAA for another Dropbox product should not be assumed to cover it. Our Dropbox pricing comparison explains those limits.

3. Fax.Plus: subscriptions and team features

Fax.Plus Basic is $8.99 month-to-month or $6.99/month equivalent with $83.99 billed annually, including 200 monthly pages. Premium is $17.99 monthly or $13.99 annual equivalent for 500 pages; Business is $34.99 monthly or $27.99 annual equivalent for 1,000.

Basic's published per-fax limit is 60 pages, Premium's is 90 and Business's is 200. Their extra-page rates are $0.10, $0.07 and $0.05. Check destination accounting, since some routes can consume multiple allowance pages per document page.

The free plan provides ten outbound pages in total, which can be enough for a small initial task. It is not a receiving plan or a ten-page monthly quota. Enterprise starts at $99.99 monthly or $79.99 annual equivalent and lists HIPAA compliance with a BAA. Choose the exact eligible plan rather than treating every subscription as covered. See our Fax.Plus review.

4. eFax: established business and enterprise plans

The US Personal plan publishes $18.99 monthly or $15.83/month equivalent with annual billing, including 200 pages. Business is $39.99 monthly or $33.33 annual equivalent for 500 pages, five users and one number. Corporate pricing is custom.

Business and Corporate list a BAA. Personal's plan card lists $0.10 extra-page pricing. The Business card lists $0.07, while the same page's offer data also describes a $25 block of 500 extra pages. Confirm the selected overage model in checkout; those are not automatically interchangeable.

eFax can make sense when a business values its receiving, integrations, team or contractual offering. Occasional senders should compare idle subscription months against a transaction price. Eligible accounts can cancel online, while some annual, multi-number, outstanding-balance or Corporate cases require support. Our eFax pricing guide covers the details.

5. iFax: app and business workflows

The live iFax pricing view explicitly labels Basic $12.49/month paid annually, with 200 pages and sending. Plus is $24.99/month paid annually with 500 pages, one number, sending and receiving. Pro is $33.33/month paid annually with 1,000 pages and additional workflow features.

These are displayed monthly equivalents of annual billing, not verified month-to-month charges. The public page has billing controls and promotions, so confirm the total commitment and renewal price before paying. Its trial language should also be read separately from an ongoing free quota.

The page advertises HIPAA features on Plus and above; confirm the BAA and exact product for your account. iFax may suit users who want its platform apps or team workflow. For one document, compare the annual commitment against a short one-time send. Our iFax review expands on that choice.

6. FaxZero: genuinely free small faxes

FaxZero's free tier allows three document pages plus its generated cover, up to five free faxes per day, to the US and Canada. Its FAQ also includes Puerto Rico. The free cover has FaxZero branding, and the free send requires clicking an email confirmation before transmission starts.

The paid Almost Free Fax costs $3.29 for up to 25 pages plus an optional cover, removes branding and receives higher queue priority. Its FAQ says failed US/Canada paid faxes get a full refund; international failures receive a 90% refund.

For a short ordinary document, the genuinely free tier can be the right choice. Confirm the packet and recipient's cover requirements. Do not assume a BAA or regulated healthcare workflow from HTTPS alone. Our FaxZero review covers privacy, email confirmation and alternatives.

7. HumbleFax: regular use at an advertised $10

HumbleFax advertises $10/month unlimited faxing, a dedicated local number, browser and email use, and a mobile web app. That combination is worth considering for someone who sends and receives frequently.

Its terms limit service to US and Canada and impose fair-use restrictions. They distinguish personal non-commercial unlimited use from tiered and metered accounts, and allow suspension or transmission delays. Confirm your commercial or automated workload rather than treating unlimited as unrestricted throughput.

The terms refer to a signed HIPAA BAA, but that does not establish that every $10 account already has one. Obtain the agreement for the selected account. Port-out conditions also matter before adopting the number permanently. See our HumbleFax review for break-even math and those account considerations.

8. FaxBurner: a temporary number and small starter quota

FaxBurner lists a free tier with five outbound pages total, 25 inbound pages per month, and a disposable number lasting 24 hours. This can suit an immediate ordinary incoming fax or a very small starter send.

Professional costs $14.95/month with 500 inbound and outbound pages; Premier is $24.95/month with 2,000. Paid packages include a permanent number. Check how the provider counts usage and the applicable per-fax and file limits before sending a large document.

The temporary-number expiry is a practical constraint: do not give it to someone who will reply next week. The free quota and later premium subscription are not a no-subscription paid checkout for each fax. Its dedicated FAQ says it is not currently HIPAA compliant and lists native iOS support, with Android directed to email. Our FaxBurner review explains the starter tier.

9. FaxItOnce: flat pricing for a longer packet

FaxItOnce lists $2.75 for one to 45 pages, including the cover, with no subscription. Its pricing page directs users to create an account and purchase a fax credit. The pricing page currently advertises no charge for failed sends and automatic retries, while its terms describe refunds or credits as discretionary and say automatic retries are not offered. Confirm those conflicting terms before purchasing.

That flat price can be attractive for a roughly forty-page packet. It is more than SingleFax's $0.99 price for a short send, but less than SingleFax's approximate $3.39 forty-document-page quote. Use the actual page count and destination before deciding.

The page explicitly says FaxItOnce does not sign BAAs and should not be used for medical records or PHI. Choose it for an appropriate ordinary document, not as a substitute for a required healthcare product. Review packet limits, account registration and applicable failure terms alongside the headline price.

10. OneTimeFax: larger one-time sends

OneTimeFax currently lists $5 for up to 100 pages, followed by $0.05 per additional page, without an account or subscription. It also offers five faxes for $15, equivalent to $3 each if you use the bundle.

That higher starting price may be less attractive for a one-page form but useful for a larger packet. A bundle lowers the unit price by requiring a larger upfront payment; compare it with the number of documents you will actually send.

The page says users can request a refund or retry from the status page if delivery fails. That differs from automatically capturing nothing. Check destination support, cover handling, file limits and any compliance needs before uploading a long document. Our one-time comparison includes the full cost scenarios.

Subscription vs pay-per-fax: break-even math

The relevant unit is the fax transaction as well as the page. Ten separate five-page faxes produce ten base charges on a pay-per-fax service; one fifty-page packet follows a different calculation. Include receiving if the task requires a reply.

This sending-only break-even around eleven short faxes does not say which service is best for a team. A team may need multiple users, a continuing inbox, access controls or a BAA. Conversely, eleven faxes in January do not justify paying for eleven inactive months without comparing cancellation and annual commitments.

For SingleFax, covers added by its composer are excluded from billed document pages; covers already merged into an uploaded PDF count as part of that document. Other providers have different cover rules. Export the final document to PDF and count it before comparing a tier.

Read our pay-per-fax vs subscription guide and use the actual destination quote. The cheapest headline can become more expensive after a cover crosses a tier or annual billing adds a commitment you did not need.

HIPAA choices: select the exact product

HHS guidance explains when business-associate agreements are required. For a healthcare organization's fax provider, confirm the applicable relationship, agreement and safeguards before sending PHI. A patient sending their own records and an organization handling records for others are different situations.

A confidentiality cover does not turn an ordinary plan into a regulated product. Verify the receiving office's number, keep unnecessary medical details off the cover, and review who can access email notifications and stored documents. See HIPAA fax for our secure route.

Frequently asked questions

Can I send for free without a trial?

Yes, when a genuine free quota covers the packet. FaxZero, Dropbox Fax, Fax.Plus and FaxBurner have documented free sending limits. A trial that renews into a paid plan is a different offer.

Is one vendor the most reliable?

This article does not establish a delivery-reliability ranking. Compare final confirmations, retry handling and operational support, then test your real workflow with a non-sensitive document. Published page allowances do not prove uptime.

Does delivered mean accepted by a government agency?

No. Delivery is transmission evidence. An agency can receive a fax and still need time to process it, or reject an incomplete form. Keep the confirmation and follow the agency's instructions for acknowledgment and follow-up.

Do I need my own number?

Only if you need to receive. For an outgoing fax, verify the recipient's direct fax number. If a reply is expected, choose a line that remains active for the whole processing window.

How should I compare prices?

Use the actual destination, full packet count, cover rule and billing commitment. Include any required BAA tier, receiving number and failure handling. Then compare the final quote rather than a promotional starting price.

What should I do next?

For a one-time task, prepare the cover and send the fax. For ongoing work, test the sending and receiving workflow before committing to a plan or distributing a permanent number.