Phaxio review (2026): is it worth paying for?
Pay-per-page fax API for developers, from 7 cents a page
Black Friday: is there a Phaxio sale?
Phaxio report card
Weak · out of 4.0 · graded Nov 12, 2026
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.
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 Phaxio 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
Why Phaxio gets a 1.8
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- BValue for money7 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.
- FFree plan and trialNo free plan and no trial. You start by topping up $10.
- CFeaturesA 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.
- DEase of useNo store rating on record. You need to write code to send a fax, and a person with no developer won't get far.
- BPlatforms and integrationsWeb 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.
What these grades rest on. 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. How we review and grade.
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<a href="https://toolgpa.com/tools/phaxio#review"><img src="https://toolgpa.com/badge/phaxio.svg" alt="Phaxio: 1.8 GPA on ToolGPA" width="196" height="56"></a>Where Phaxio stands among 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.
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, level with 7
- FFree plan and trialAbove 0 of 20, level with 6
- CFeaturesAbove 2 of 20, level with 8
- DEase of useAbove 0 of 20, level with 1
- BPlatforms and integrationsAbove 4 of 20, level with 11
Keep Phaxio, or make your own?
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.
What is Phaxio?
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.
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.
Key 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.
Phaxio pricing
As of Nov 12, 2026, Phaxio is a paid product, starting at $10 minimum top-up, then 7 cents per page in the US and Canada.
- Starts at
- $10 minimum top-up, then 7 cents per page in the US and Canada
- Free plan
- None
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Pay as you go | $10one-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. Prices change, so confirm with Phaxio before you buy.
Ways to pay less
- Other savingsVolume 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
Phaxio alternatives
- Phaxio vs Notifyre
From $4.90/mo
- Phaxio vs SRFax
From $10.70/mo
- Phaxio vs Fax.Plus
Free trial · from $6.99/mo
- Phaxio vs Sfax
Free trial
- Phaxio vs InterFAX
Free trial · from $9.95/mo
Common questions
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.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.