The InterFAX Insider’s Guide
Everything we know about InterFAX in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
InterFAX
The Insider’s Guide
Cloud fax by subscription or prepaid credit, with REST and SOAP APIs
Every plan, grade, refund rule and rival among online fax services, read from InterFAX’s own pages.
Made by Upland Software, Inc. · checked Nov 12, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from InterFAX’s own pages, its app-store listings and our grades. Every fact in it is on InterFAX’s page too, where it is kept up to date. Checked Nov 12, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.4
GPA, above 10 of the 20 other online fax services we grade
InterFAX is a cloud fax service now sold by Upland Software. It offers monthly subscriptions that include a local number, prepaid page packages with no monthly commitment, and custom plans for high volumes. Faxes can be sent from email, Outlook, Gmail, Salesforce, Epic and OncoEMR, or through REST, SOAP and SMTP APIs.
To get you started, here are 9 things to know about InterFAX, taken from its own pages and our grades.
The pitch is built around developers and IT teams wiring fax into other software.
- 1
Best for fax with an API and compliance papers
InterFAX is an Upland fax service with REST, SOAP and email APIs, plus connectors for Epic and Salesforce and SOC 2 and HIPAA statements.
- 2
Paid plans start at $9.95 a month
As its pricing page puts it: $9.95 per month for 100 inbound and 100 outbound pages, billed monthly.
- 3
You can try it first
Free trial on monthly plans; the product page offers 30 days of free credits
- 4
It runs on Web
Web.
- 5
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.
- 6
Email and desktop integrations
Send faxes from Gmail, Outlook or any email client over SMTP, and fax from inside Salesforce.
- 7
Healthcare integrations
Connectors are listed for Epic 2017 and later and for OncoEMR, with HIPAA and PHIPA alignment stated for inbound and outbound faxes.
- 8
A 2.4 GPA, above 10 of 20
That is against the other online fax services we grade, on value, the free plan, features, ease of use and platforms.
- 9
Keep it
To replace InterFAX you would be making fax numbers connected to the phone network. That is not a weekend's work, with an AI app builder or without one.
InterFAX at a glance
- Pricing
- Free trial, from $9.95 per month for 100 inbound and 100 outbound pages, billed monthly
- Free plan
- No
- Free trial
- Free trial on monthly plans; the product page offers 30 days of free credits
- Runs on
- Web
- Made by
- Upland Software, Inc.
- Category
- Online Fax
- Our grade
- 2.4 GPA, fair
The report card
Best for fax with an API and compliance papers
InterFAX is an Upland fax service with REST, SOAP and email APIs, plus connectors for Epic and Salesforce and SOC 2 and HIPAA statements. Plans start at $9.95 a month for 100 pages in and 100 out, with $0.09 for each extra page, and toll-free numbers and larger packages need a sales quote.
| Subject | Grade | Comment |
|---|---|---|
| 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. |
| Free plan and trial | C | A 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. |
| Features | B | REST, 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. |
| Ease of use | C | No store rating on record. The pitch is built around developers and IT teams wiring fax into other software. |
| Platforms and integrations | B | Web admin, with REST, SOAP and SMTP APIs, code libraries on GitHub, and Epic, OncoEMR and Salesforce connectors. No phone or desktop app is listed. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who InterFAX is for
- Fits if you want to add fax to your own software through an API
- Works for healthcare and finance teams that need compliance statements
Who it is not for
- 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
Good to know
Good for
- Organizations that want a fax API alongside a plain subscription
- Healthcare and finance teams that need compliance statements and EMR integrations
- Occasional senders who prefer prepaid pages to a monthly plan
Worth knowing
- 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.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$9.95
A month to start
InterFAX is a paid product with a free trial, starting at $9.95 per month for 100 inbound and 100 outbound pages, billed monthly.
The listing doesn't say if a card is needed.
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.
Custom
Custom
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.
Trying it first
Free trial on monthly plans; the product page offers 30 days of free credits
Read from uplandsoftware.com on Nov 12, 2026.
Ways to pay less
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.
Stated on uplandsoftware.com
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Cloud fax by subscription or prepaid credit, with REST and SOAP APIs. Here is what it does, as its own site describes it, and what it covers: public API, workflow automation, online fax.
The listing shows no gap in the fax job itself.
- 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.
Where it runs
- Web
What it works with
- Salesforce
- Gmail
- Microsoft Outlook
- Epic
- OncoEMR
InterFAX is made by Upland Software, Inc.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
10/20
Other online fax services it is graded above
InterFAX's GPA of 2.4 is higher than 10 of the 20 other online fax services we grade, and level with 7.
It stands best on features (B, above 11 of 20) and worst on value for money (C, above 2).
Its paid plans start at $9.95 a month, against a middle price of $9.14 for the category: 8 of the 15 others that charge start lower.
On features, ease of use and platforms it scores 2.7 out of 4. 2 tools score higher and cost less.
Each grade against the category
Every bar is all 21 online fax services we grade, cut by the letter each got. InterFAX’s own letter is outlined.
- CValue for moneyAbove 2 of 20
- CFree plan and trialAbove 10 of 20
- BFeaturesAbove 11 of 20
- CEase of useAbove 2 of 20
- BPlatforms and integrationsAbove 4 of 20
Price against what you get
Each dot is one of 16 online fax services. Further left costs less; higher up scores better on features, ease of use and platforms. InterFAX is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
To replace InterFAX you would be making fax numbers connected to the phone network. That is not a weekend's work, with an AI app builder or without one.
It costs $119.40 a year.
What you could not
- Fax numbers connected to the phone network.
- Connections to other products, each kept working as those products change.
- What a company asks for before it lets staff use something: SOC 2 and HIPAA.
- The depth: we grade its features B, which means it covers the whole job.
What this rests on. InterFAX’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
SRFax, eFax, Phaxio, Notifyre and Sfax
The 5 tools InterFAX is most often weighed against, with where each one differs from it.
- 2.0GPA
SRFax
From $10.70/mo
Email-to-fax service with HIPAA plans and a REST API.
- InterFAX also covers workflow automation.
- 2.8GPA
eFax
Free trial · from $15.83/mo
Online fax by email, web and apps, with personal and business plans.
- Only eFax lists Windows, iOS and Android apps.
- InterFAX also covers workflow automation.
- 1.8GPA
Phaxio
From $10
Pay-per-page fax API for developers, from 7 cents a page.
- InterFAX also covers workflow automation.
- 2.2GPA
Notifyre
From $4.90/mo
Pay-per-page online fax and business texting, with a fax API.
- InterFAX also covers workflow automation.
- Notifyre also covers business texting.
- 2.2GPA
Sfax
Free trial
HIPAA cloud fax for healthcare offices, with print drivers and an API.
- Only Sfax lists Windows, macOS and iOS apps.
- InterFAX also covers workflow automation.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
14
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is InterFAX free?
No, InterFAX is a paid product, but you can try it first. Free trial on monthly plans; the product page offers 30 days of free credits.
How much does InterFAX cost?
InterFAX lists 5 plans. Fax + 200: $9.95 per month for 100 inbound and 100 outbound pages, billed monthly.
What platforms does InterFAX work on?
InterFAX is available on Web.
Does InterFAX offer any discounts?
InterFAX publicly lists the following: Free developer program with free faxing to one number.
Does InterFAX have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. InterFAX is listed for Web.
Does InterFAX have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. InterFAX is listed for Web.
Is InterFAX open source?
InterFAX is not described as open source on its own site, as read on Nov 12, 2026.
Does InterFAX have an API?
Yes. InterFAX offers a public API, according to its own site.
What does InterFAX integrate with?
InterFAX's listing names Salesforce, Gmail, Microsoft Outlook, Epic and OncoEMR.
Who makes InterFAX?
InterFAX is made by Upland Software, Inc.
What are the alternatives to InterFAX?
The closest alternatives to InterFAX in our directory are SRFax, eFax, Phaxio, Notifyre and Sfax.
How does InterFAX compare with other online fax services?
InterFAX's GPA of 2.4 is higher than 10 of the 20 other online fax services we grade, and level with 7.
Is InterFAX good value for money?
ToolGPA grades InterFAX C for value for money. Its paid plans start at $9.95 a month, against a middle price of $9.14 for the category: 8 of the 15 others that charge start lower.
Could I make my own version of InterFAX?
To replace InterFAX you would be making fax numbers connected to the phone network.
Where this guide comes from
The prices, plans, platforms and features were read from InterFAX’s own pages on Nov 12, 2026, and the grades were given on Nov 12, 2026. Graded from this listing, whose facts were read from InterFAX's own pages on 12 November 2026, though its pricing page would not load for us on this check. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Upland Software, Inc. Prices change, so check uplandsoftware.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
5,038
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
5,038
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- InterFAX, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/interfax
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "InterFAX: The Insider's Guide", checked Nov 12, 2026. https://toolgpa.com/tools/interfax
Know someone choosing between online fax services?
Send them this guide: toolgpa.com/tools/interfax/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded online fax services after InterFAX, each with an Insider's Guide of its own.
- Online Fax Insider's GuideEvery one of the 21 online fax services we grade, compared
- Fax.Plus Insider's GuideOnline fax by web, email, desktop and mobile apps, priced by pages3.0 GPA
- eFax Insider's GuideOnline fax by email, web and apps, with personal and business plans2.8 GPA
- iFax Insider's GuideOnline fax apps and fax API, with HIPAA plans and AI fax reading2.6 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what InterFAX’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. InterFAX is a trademark of its owner, and this guide is not made, paid for or approved by Upland Software, Inc. Prices and plans change: check uplandsoftware.com before you buy.