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The Phaxio Insider’s Guide

Everything we know about Phaxio 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.

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ToolGPANovember 2026

Phaxio

The Insider’s Guide

Pay-per-page fax API for developers, from 7 cents a page

Every plan, grade, refund rule and rival among online fax services, read from Phaxio’s own pages.

Made by Phaxio · checked Nov 12, 2026 · toolgpa.com

1.8GPA

Contents

  1. 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
  2. 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
  3. 03What it doesIts main features, where it runs, what it works with and who makes it
  4. 04Where it standsIts grades against its category, and whether to keep it or make your own
  5. 05The alternativesThe tools it is most often weighed against, side by side
  6. 06Quick answersThe questions people ask about it, each answered in a line or two
  7. 07About ToolGPAWho made this guide, what else is on the site, and how to cite it

ToolGPA put this guide together from Phaxio’s own pages, its app-store listings and our grades. Every fact in it is on Phaxio’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

1.8

GPA, above 0 of the 20 other online fax services we grade

Phaxio is a fax API for sending and receiving faxes from code, with a web dashboard for managing faxes and numbers. There are no monthly fees: an account is funded in advance and charged per page, with lower rates at high monthly volumes. Documentation and client libraries cover several languages.

To get you started, here are 8 things to know about Phaxio, taken from its own pages and our grades.

You need to write code to send a fax, and a person with no developer won't get far.
From our grade for ease of use
  1. 1

    Best for adding fax to an app by API

    Phaxio is a fax API that charges per page: 7 cents in the US and Canada, 10 cents elsewhere, topped up from $10.

  2. 2

    What it costs

    Paid plans start at $10 minimum top-up, then 7 cents per page in the US and Canada.

  3. 3

    It runs on Web

    Web.

  4. 4

    JSON fax API

    Send a fax with one call that takes a number and a file, or post a URL or a string of HTML to be rendered and sent.

  5. 5

    Batching and retries

    Batching and collision avoidance keep faxes from hitting a busy number, and retries for busy lines and other errors are configurable.

  6. 6

    Callbacks and metadata

    Failed callbacks are retried for three days, and each outgoing fax can carry metadata such as an order number or patient record number.

  7. 7

    A 1.8 GPA, above 0 of 20

    That is against the other online fax services we grade, on value, the free plan, features, ease of use and platforms.

  8. 8

    Keep it

    To replace Phaxio 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.

Phaxio at a glance

Pricing
Paid, from $10 minimum top-up, then 7 cents per page in the US and Canada
Free plan
No
Free trial
None stated
Runs on
Web
Made by
Phaxio
Category
Online Fax
Our grade
1.8 GPA, weak

The report card

Best for adding fax to an app by API

Phaxio is a fax API that charges per page: 7 cents in the US and Canada, 10 cents elsewhere, topped up from $10. There's no monthly fee, but it is built for developers, the API allows one request a second unless Phaxio raises it, and there is no free tier or trial.

ToolGPA report cardPhaxioGraded Nov 12, 2026
SubjectGradeComment
Value for moneyB7 cents a page in the US and Canada with a $10 minimum top-up and no monthly fee. A receiving number is $2 a month. Light senders pay far less than a plan; volume rates start at 50,000 pages.
Free plan and trialFNo free plan and no trial. You start by topping up $10.
FeaturesCA JSON fax API with batching, retries, callbacks and metadata, plus numbers for receiving. It does that job fully, and it is a smaller job than a full fax service.
Ease of useDNo store rating on record. You need to write code to send a fax, and a person with no developer won't get far.
Platforms and integrationsBWeb console plus the API, which is the product. Phaxio says it can serve HIPAA workloads if its guidelines are followed. No phone or desktop app.
Grade point averageWeak, out of 4.01.8

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 Phaxio is for

  • Fits if you're a developer who needs to send faxes from your own software
  • Works for low-volume senders who don't want a monthly plan

Who it is not for

  • Not for you if you don't write code, because the main way in is the API
  • Skip it if you want a free trial, as there isn't one
  • Watch out: the API allows one request per second per account unless Phaxio raises it
  • Pricey if you send a lot: volume rates only start at 50,000 pages a month

Good to know

Good for

  • Developers who need fax inside an application
  • Low-volume senders who do not want a monthly plan
  • High-volume senders that qualify for volume rates

Worth knowing

  • Pricing is per page only: 7 cents in the US and Canada, 10 cents international, and 1 cent per fax received for the caller name add-on.
  • Volume rates start at 50,000 pages a month: 5 cents, then 4 cents at 100,000.
  • The API allows one request per second per account unless Phaxio raises it.
  • Phaxio says it can be used for HIPAA workloads if its guidelines are followed, and it supports docx, pdf, tif, jpg, txt, html and png.

Part 02 · Pricing

What it costs

Every plan, the free plan, ways to pay less and how prices have moved

$10

To start

Phaxio is a paid product, starting at $10 minimum top-up, then 7 cents per page in the US and Canada.

  • Pay as you go

    $10

    one-time top-up, used as you go

    No monthly fee. 7 cents a page in the US and Canada, 10 cents elsewhere; funds can recharge automatically.

Read from phaxio.com on Nov 12, 2026.

Ways to pay less

  • Other savings

    Volume discounts above 50,000 pages a month

    US and Canada pages drop to 5 cents at 50,000 a month and 4 cents at 100,000; international drops to 8 and then 7 cents.

    Stated on phaxio.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

Pay-per-page fax API for developers, from 7 cents a page. Here is what it does, as its own site describes it, and what it covers: public API, online fax.

A JSON fax API with batching, retries, callbacks and metadata, plus numbers for receiving.
From our grade for features
JSON fax API
Send a fax with one call that takes a number and a file, or post a URL or a string of HTML to be rendered and sent.
Batching and retries
Batching and collision avoidance keep faxes from hitting a busy number, and retries for busy lines and other errors are configurable.
Callbacks and metadata
Failed callbacks are retried for three days, and each outgoing fax can carry metadata such as an order number or patient record number.
Numbers for receiving
Receive faxes on a US or Canadian number at $2 a month, or use the shared Phaxio number with a PhaxCode on the document.
Dashboard
A web console lists faxes, provisions numbers and lets you trigger a callback by hand.

Where it runs

  • Web

What it works with

Its own pages name no integrations.

Phaxio is made by Phaxio.

Part 04 · Standing

Where it stands

Its grades against its category, and whether to keep it or make your own

0/20

Other online fax services it is graded above

Phaxio's GPA of 1.8 is higher than 0 of the 20 other online fax services we grade, and level with 2.

It stands best on value for money (B, above 13 of 20) and worst on free plan and trial (F, above 0).

Each grade against the category

Every bar is all 21 online fax services we grade, cut by the letter each got. Phaxio’s own letter is outlined.

  • BValue for moneyAbove 13 of 20
  • FFree plan and trialAbove 0 of 20
  • CFeaturesAbove 2 of 20
  • DEase of useAbove 0 of 20
  • BPlatforms and integrationsAbove 4 of 20

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 Phaxio 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.

That makes this kind of software worth paying for, not this one in particular: 18 of the 20 other online fax services grade higher.

What you could not

  • Fax numbers connected to the phone network.
  • An API that other software can build on.

What this rests on. Phaxio’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

Notifyre, SRFax, Fax.Plus, Sfax and InterFAX

The 5 tools Phaxio is most often weighed against, with where each one differs from it.

Part 06 · Questions

Quick answers

The questions people ask about it, each answered in a line or two

12

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 Phaxio free?

No. Phaxio is a paid product, starting at $10 minimum top-up, then 7 cents per page in the US and Canada.

How much does Phaxio cost?

Phaxio lists one plan. Pay as you go: $10 one-time top-up, used as you go.

What platforms does Phaxio work on?

Phaxio is available on Web.

Does Phaxio offer any discounts?

Phaxio publicly lists the following: Volume discounts above 50,000 pages a month.

Does Phaxio have an Android app?

No Android app was listed when its pages were read on Nov 12, 2026. Phaxio is listed for Web.

Does Phaxio have an iPhone app?

No iPhone app was listed when its pages were read on Nov 12, 2026. Phaxio is listed for Web.

Is Phaxio open source?

Phaxio is not described as open source on its own site, as read on Nov 12, 2026.

Does Phaxio have an API?

Yes. Phaxio offers a public API, according to its own site.

Who makes Phaxio?

Phaxio is made by a company of the same name.

What are the alternatives to Phaxio?

The closest alternatives to Phaxio in our directory are Notifyre, SRFax, Fax.Plus, Sfax and InterFAX.

How does Phaxio compare with other online fax services?

Phaxio's GPA of 1.8 is higher than 0 of the 20 other online fax services we grade, and level with 2.

Could I make my own version of Phaxio?

To replace Phaxio 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 Phaxio’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 Phaxio's own pages on 12 November 2026. 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 Phaxio. Prices change, so check phaxio.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

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, "Phaxio: The Insider's Guide", checked Nov 12, 2026. https://toolgpa.com/tools/phaxio

Know someone choosing between online fax services?

Send them this guide: toolgpa.com/tools/phaxio/guide

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See our other guides

The best-graded online fax services after Phaxio, each with an Insider's Guide of its own.

ToolGPA

Choosing software? Every tool graded, every price dated.

Compare tools at toolgpa.com ›

Everything in this guide is ToolGPA’s own summary of what Phaxio’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. Phaxio is a trademark of its owner, and this guide is not made, paid for or approved by Phaxio. Prices and plans change: check phaxio.com before you buy.