InterFAX vs Sfax (2026): which should you pick?
As of Nov 12, 2026, InterFAX grades higher than Sfax: 2.4 against 2.2 out of 4.0.
Checked Oct 23, 2026 and Nov 12, 2026 · graded Oct 24, 2026 and Nov 12, 2026 by ToolGPA
InterFAX grades higher on the free plan. They get the same grade on value for money, features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
InterFAX
Cloud fax by subscription or prepaid credit, with REST and SOAP APIs
Sfax
HIPAA cloud fax for healthcare offices, with print drivers and an API
Which one is for you
Pick InterFAX if
- Fits if you want to add fax to your own software through an API
- Works for healthcare and finance teams that need compliance statements
Look elsewhere if
- Skip it if you want a yearly rate, as prices are shown monthly only
- Tight if you want toll-free numbers or several lines, which need a custom quote
- Watch out: PCI DSS compliant outbound faxing costs an extra per-fax fee that isn't published
- Skip it if you fax twice a year from a home office, as the pitch is built for developers and IT teams
Pick Sfax if
- Fits if your medical office needs an audit trail on every fax
- Works for practices that fax from desktop programs through a print driver
Look elsewhere if
- Not for you if you want to see a price first, as none could be read from Sfax's pages
- Watch out: the trial is a paid plan you must cancel within 14 days, and monthly plans need 30 days' notice to cancel
- Skip it if you use Android, or Windows older than 11, as neither is supported
- Tight if you need several lines, since plans include one toll-free line and each extra is $5 a month
How we grade them
| 2.4GPAInterFAXFair | 2.2GPASfaxFair | |
|---|---|---|
| Value for money | C$9.95 a month for 100 inbound and 100 outbound pages, matching the category's $9.95 middle. Extra pages are $0.09 each, and long pages are billed in six-second steps. | CNo price is on record. Sfax's pages turned our reader away and its help centre lists none, so there's nothing to set against the field. Each extra line is $5 a month, or $48 a year on annual plans. |
| Free plan and trial | CA free trial on monthly plans, which the product page describes as 30 days of free credits. The listing doesn't say if a card is needed. | DThe 14-day trial means signing up to a paid plan and cancelling within 14 days to avoid the charge. After that there are no refunds or part months. |
| Features | BREST, SOAP and SMTP APIs, Gmail and Outlook sending, Salesforce and healthcare connectors, and SOC 2, ISO 27001 and HIPAA statements. The listing shows no gap in the fax job itself. | BA web app with folders and a library, print-to-fax on Windows and Mac, annotating and signing, an audit trail on each fax, admin controls with SSO, an API with callbacks, and Box and ShareFile. That covers the job. |
| Ease of use | CNo store rating on record. The pitch is built around developers and IT teams wiring fax into other software. | CNo store rating on record. You install a print driver to fax from other programs, and admins set up users, lines, permissions, IP safelists and SSO. |
| Platforms and integrations | BWeb admin, with REST, SOAP and SMTP APIs, code libraries on GitHub, and Epic, OncoEMR and Salesforce connectors. No phone or desktop app is listed. | BWeb, Windows 11, Mac and iPhone, with an API, Box, ShareFile and SSO through Okta, Entra ID, Google Workspace and others. There's no Android app, which keeps it off the top grade. |
| Best for | fax with an API and compliance papers | audited HIPAA fax for medical offices |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: InterFAX and Sfax. How we grade
Where they differ
- InterFAX also covers workflow automation.
At a glance
| InterFAX | Sfax | |
|---|---|---|
| Pricing | Free trial | Free trial |
| Starts at | $9.95 per month for 100 inbound and 100 outbound pages, billed monthly | Not published |
| Free plan | None | None |
| Free trial | Free trial on monthly plans; the product page offers 30 days of free credits | 14-day free trial: a paid plan cancelled within 14 days of sign-up is not charged |
| Web | ||
| macOS | ||
| Windows | ||
| iOS | ||
| Made by | Upland Software, Inc. | Consensus Cloud Solutions |
| Price read from | uplandsoftware.com | Not confirmed |
| Checked | Nov 12, 2026 | Oct 23, 2026 |
Worth knowing
InterFAX
- Subscription prices are shown monthly only; no annual rates are listed.
- Pages longer than one minute are charged in six-second increments at one-tenth of the per-page cost.
- Toll-free numbers, multiple lines and larger prepaid packages need a custom quote from sales.
- PCI DSS compliant outbound faxing costs an additional fee per fax; the fee is not published.
Sfax
- Prices could not be read: the Sfax pages on scrypt.com turned away automated reading, and the help center lists no prices.
- Plans include one toll-free line; each extra line is $5 a month on monthly plans or $48 a year on annual plans.
- Cancelling a monthly plan needs 30 days' notice by support ticket or email, with no refunds or partial months after the first 14 days.
- The Windows app supports only Windows 11 on x64 or x86, and the help center lists an iPhone app but no Android app.
Key features
InterFAX
- REST, SOAP and SMTP APIs
- Developers can add faxing to an application with REST, SOAP or SMTP APIs and GitHub libraries for Java, .NET, PHP, Ruby and more.
- Email and desktop integrations
- Send faxes from Gmail, Outlook or any email client over SMTP, and fax from inside Salesforce.
- Healthcare integrations
- Connectors are listed for Epic 2017 and later and for OncoEMR, with HIPAA and PHIPA alignment stated for inbound and outbound faxes.
- Compliance options
- The vendor lists SOC 2 audited, ISO 27001 accredited and HIPAA compliant, plus PCI DSS compliant outbound faxing for a small extra fee per fax.
- Web admin and worldwide servers
- A web admin screen monitors usage, and servers in several regions are offered for data sovereignty.
Sfax
- Web app with folders and a library
- Send, forward, export and split faxes in the browser, sort received faxes into folders and keep reusable files in a document library.
- Windows and Mac print drivers
- Install the Sfax printer on Windows 11 or a Mac and fax a document from any program's print menu.
- Annotate and sign faxes
- Mark up and sign a received fax before sending it back, and pick a default fax cover page or buy custom ones.
- Audit trail and HIPAA
- Each fax keeps an audit trail of activity, and Sfax says it is HIPAA and GLBA compliant and signs a BAA on request.
- Admin, SSO and permissions
- Admins add users and fax lines, set permissions and IP safelists, and connect single sign-on through Okta, Microsoft Entra ID, Google Workspace and others.
- API and file integrations
- An API with callbacks lets other software send and receive faxes, and Box and ShareFile integrations move faxes into document storage.
Plans
InterFAX
Fax + 200$9.95
per month for 100 inbound and 100 outbound pages, billed monthly
Local fax number included, no setup fee or contract; $0.09 per additional page.
Fax + 500$22.95
per month for 250 inbound and 250 outbound pages, billed monthly
Local number included, no contract; $0.09 per additional page.
Fax + 1000$42.95
per month for 500 inbound and 500 outbound pages, billed monthly
Local number included, no contract; $0.08 per additional page.
CustomCustom
Built with sales: toll-free numbers, multiple lines, extra security options and data sovereignty at high volume.
Pre-paid Basic$10
one-time purchase of 91 pages at $0.11 per page
No monthly commitment or minimum. A $50 Level 1 package gives 500 pages at $0.10; larger packages come from sales.
Sfax
Pricing could not be confirmed. See scrypt.com.
Ways to pay less
InterFAX
- Other savings
Free developer program with free faxing to one number
InterFAX says its free Developer program includes API access, free faxing to one number and expert support.
Sfax
No public discounts listed.
Common questions
Which is cheaper, InterFAX or Sfax?
As of Nov 12, 2026, InterFAX starts at $9.95 per month for 100 inbound and 100 outbound pages, billed monthly, and Sfax has no price we could confirm.
Which has a free plan, InterFAX or Sfax?
As of Nov 12, 2026, neither InterFAX nor Sfax has a free plan. Both have a free trial.
Which platforms do InterFAX and Sfax run on?
As of Nov 12, 2026, only Sfax lists macOS, Windows and iOS apps. Both list a web app. A platform missing from a listing is one its maker's pages did not mention.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.