5 vendors with a live product page for this class

Fax API: vendors compared on printed prices

A fax API lets software send and receive faxes without a person at a web page: a practice management system sending referrals, a claims platform receiving forms, a pharmacy sending prescriptions. Every vendor below keeps a live fax API product page on its own domain, which is the evidence this index counts; API pricing is usually on request or on a developer tier, so the price table records each vendor's printed entry plan, allowance and overage as the floor of what the same account costs, and the vendor's own API page, linked beside the price, is where the per-page and volume terms live.

median printed entry price, per month
$14.99
printed entry-price range across vendors
$6.99 to $25
vendors with an evidenced Fax API product
5

Vendors with an evidenced Fax API product

Vendor Entry price Fax API product Source Checked
Fax.Plus $6.99/mo Fax.Plus's own product page fax.plus September 2026
iFax $12.49/mo iFax's own product page ifaxapp.com September 2026
eFax $14.99/mo eFax's own product page efax.com September 2026
WestFax $14.99/mo WestFax's own product page westfax.com September 2026
Documo $25/mo billed annually Documo's own product page documo.com September 2026

A vendor appears here when its own live page for Fax API answered at the linked URL on the date shown. Prices in the table are each vendor's printed entry price, the pages that plan includes and the overage per page; the class page is evidence of a product, and the vendor's own page is where its terms live.

Choosing a fax API

Price by page volume, not by plan. API traffic is metered per page at volume rates that the pricing pages rarely print; Documo prints developer APIs as a Business plan feature at 1,500 pages a month with $0.09 per additional page, which is the one printed API-tier overage in the index.

Check the BAA for automated traffic. An API sending patient records is handling protected health information exactly as a person would; the vendors that also appear on the HIPAA compliant fax class page state compliance on their own pages.

Test delivery reporting first. The API's value is the status callback that says a fax completed or failed and why; read the vendor's API documentation for it before writing a line of integration.

Common questions

What is a fax API?
A programming interface that lets software send faxes, receive them as documents, and read delivery status without a person using a web page. The vendors on this page keep a live API product page on their own domain.
How much does a fax API cost?
Usually per page at volume rates on request or on a developer tier. The table records each vendor's printed entry plan as the floor; Documo prints APIs on its Business plan with $0.09 per additional page.
Is a fax API HIPAA compliant?
Only if the vendor signs a BAA covering it. The vendors that appear on both this page and the HIPAA compliant fax page state compliance on their own product pages; confirm the BAA covers API traffic before integrating.

Cite or embed this figure

The median printed entry price per month in Fax API was $14.99 in September 2026, across 5 verified vendor pricing pages recorded in Fax Line Index Online Fax Price Index.

Cite as: "Fax Line Index Online Fax Price Index: Fax API", updated 2026-09-03, https://faxlineindex.com/fax/fax-api/.

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median printed entry price per month · Fax API · September 2026

$14.99

Middle 50%$6.99 – $25
verified vendor pricing pages5

Source: Fax Line Index Online Fax Price Index

Download the Fax API dataset (CSV), free to reuse with citation.

Which fax plan fits?Compare fax prices