The best online fax services of 2026

Yes — healthcare, legal, financial services, and government still send significant fax volume because of regulatory or inertia reasons. Healthcare alone sends an estimated 9 billion fax pages per year in the US. Modern online fax is not a fax machine — it is an encrypted email/API gateway that transmits to a legacy fax receiver. The sender uploads a PDF from Gmail, Outlook, a web app, or an API and the service negotiates the T.38 or G.711 signal to the recipient. For HIPAA-regulated workflows, fax remains one of the accepted PHI transport mechanisms under the Security Rule.

In 2026, the cheapest BAA-signed options are DialPhone (Advanced plan at $34/user/mo, BAA included) and Sfax (starts $29/mo). Standalone consumer fax services (eFax Plus, Metrofax, HelloFax) do not offer HIPAA BAA on entry tiers — you need their business or enterprise tier for BAA, which typically prices above $30/mo. If you already run DialPhone or RingCentral for your phone system, the included fax is usually the lowest total-cost option since you are not adding a vendor.

Yes. DialPhone, eFax, RingCentral Fax, and FaxPlus all support email-to-fax: you email a PDF or image attachment to a destination like [email protected] from your Gmail or Outlook, and the service places the fax. DialPhone also supports native send/receive inside Microsoft Teams via the Teams app, letting reps fax without leaving Teams. Incoming faxes land in your inbox as PDF attachments with a digital receipt. Some services (Metrofax, HelloFax) email-to-fax works but the return path to your inbox is less polished.

Bundled plans include 150-500 pages per month at the entry tier. Overage pricing ranges $0.05 to $0.15 per page. If you send 1,000+ pages monthly, look for services that sell page-volume plans (DialPhone, RingCentral, Sfax) rather than per-page consumer plans (eFax, Metrofax). For international fax, pricing varies significantly by destination country — confirm the per-page rate for your top three destinations before signing.

Criteria: (1) HIPAA BAA availability and the tier required; (2) Integration depth (Gmail, Outlook, Microsoft Teams, Google Drive, Box, Dropbox); (3) International destination breadth; (4) Pricing transparency including overage; (5) Sending volume sweet spot; (6) Phone-system bundling value; (7) Modern UX and API access. Competitor pricing shown is approximate based on publicly available information as of April 2026 — verify current pricing directly with each vendor before purchase.

Compose a new email in Gmail. In the To field type the destination fax number followed by your provider domain — for DialPhone that is [email protected] (e.g. [email protected]). Attach the document as a PDF, JPG, or DOC. The body of the email becomes the cover sheet. Hit send. The fax service negotiates the T.38 connection to the recipient fax. You receive an email back within 30-60 seconds with a transmission receipt. Same flow works in Outlook, Apple Mail, and Yahoo Mail. Outlook users can also use the DialPhone Outlook add-in to fax directly from a message thread without composing a separate email.

For sensitive financial documents, use a fax service that offers (a) end-to-end TLS encryption between your endpoint and the fax gateway, (b) a Business Associate Agreement (HIPAA) or equivalent contract for financial data handling, (c) at-rest encryption on stored copies, (d) audit logs you can export, and (e) US-based data residency if your bank requires it. Among the seven services on this page, DialPhone, Sfax, and RingCentral Fax meet all five criteria at their business tiers. Avoid free fax services and consumer-tier plans for banking, loan applications, tax documents, or anything containing SSNs, account numbers, or routing numbers. If you do not have an account, your bank or accountant can usually fax securely on your behalf — many banks offer a customer-facing secure-fax portal as a free service.

All seven services on this page support international fax, but per-page rates and country coverage vary. DialPhone covers 105 countries at published per-minute rates similar to its voice rates. FaxPlus has the strongest European footprint with EU data residency. eFax, RingCentral Fax, and Metrofax cover the major destinations (UK, Canada, Australia, Mexico, Western Europe) but charge premium per-page rates outside the included regions. Before signing, calculate your three top destination countries times expected monthly pages and compare total cost. For high-volume international (1,000+ pages/mo to non-US destinations), consider a bundled UCaaS plan over a metered consumer fax service.

For occasional one-off fax of paper documents, options include: (1) UPS Stores, FedEx Office, and Staples charge $1-3 per page for walk-in fax service, (2) most public libraries offer fax for $0.25-$1 per page, (3) some banks and accountants will fax for customers as a courtesy, (4) hotel business centers fax for $1-2 per page (often free for guests). For ongoing or higher-volume sending, an online fax account at $10-30 per month is cheaper than walk-in within the first 5-10 pages. Several services (DialPhone Online Fax) offer a 14-day free trial that lets you send a small number of pages with no commitment.