18.0
FAX.PLUS is a fax service for sending and receiving documents through web, desktop, Android, iOS, email, Google, and multifunction printers.
Free planAndroidiOSWeb
Best Fax APIs in 2026
FAX.PLUS leads this chart of 26 (8.0/10, free plan). eFax is next (7.7/10), and Faxxing is the next highest-placed with a free plan (6.6/10). Fax APIs let software handle inbound and outbound faxing through an API or web service. Compare delivery tracking, webhook events, API protocol and included pages before you choose. Check the provider’s platform details if you plan to work from a Xiaomi, Redmi or POCO phone. Android, web, Windows, iOS and macOS support can vary by service.
27.7
AndroidiOSWeb
37.5
AndroidiOSWeb
- 4
WestFax
AndroidiOSWebAPI7.5From $14.99 a month - 5
FaxCore
FaxCore is enterprise fax server software that can run on-premises, as a managed cloud service, or in a hybrid configuration.
WebAPISelf-hostedWindows7.3From $60 a month - 6
FAXAGE
FAXAGE provides Internet faxing through email, a website, mobile apps and an API.
AndroidiOSWebAPI7.2From $3.49 a month - 7
GoFax REST API
AndroidiOSWebAPI6.9 - 8
Notifyre
Notifyre provides online fax and SMS services through its web platform, email, APIs, and integrations.
AndroidiOSWebAPI6.9From $4.90 a month - 9
Faxxing
Free planWebAPI6.6$10 usage-based - 10
ETHERFAX
ETHERFAX provides cloud faxing and document workflows for healthcare organizations, U.S.
WebAPILinuxmacOS6.5 - 11
HumbleFax
AndroidWeb6.5From $10 a month - 12
Openfax Cloud Fax API
WebAPI6.5 - 13
Send FAX Mail API
WebAPI6.4From $12.99 a month - 14
Documo Fax API
WebAPI6.3From $25 a month - 15
Phaxio
WebAPI6.3From $2 a month - 16
Faxsuite REST API
WebAPI6.2From €9.90 a month - 17
LuzardoFax API
WebAPI6.2From $25 a month - 186.0From $8.95 a month
- 19
Sinch Fax API
Sinch Fax API sends and receives faxes through a cloud service, with REST API access for integrating fax workflows into software.
WebAPI6.0 - 20
SingleFax API
WebAPI5.9From $79 a year - 21
Concord Fax API
WebAPI5.8 - 22
Fax² API
WebAPI5.8 - 23
mintfax
WebAPI5.8$0.04 usage-based - 24
OpenText Core Fax Management API
OpenText Core Fax Management API provides JSON-based REST APIs for administering OpenText Core Fax, a cloud fax service.
API5.4 - 254.6
Choosing well
Check platform access
Review whether the service offers Android, web, Windows, iOS or macOS access for your workflow. An API listing may be separate from a phone app.
For Xiaomi, Redmi and POCO devices, confirm Android support on the provider’s platform page before signing up.
Compare plans and trials
Look for a free plan, paid-from price and trial terms. FAX.PLUS lists a free plan and paid plans from $6.99 per month; Faxxing also lists a free plan.
Trial periods vary by service. Documo lists 14 days, eFax 7 days, Fax² 30 days and Faxsuite 28 days.
Match fax workflows
Check whether you need inbound faxing, outbound faxing or both. Confirm how delivery tracking is reported and whether webhook events can notify your software.
Review the API protocol in the documentation so it fits your integration work.
Check included pages
Compare the included-pages allowance with your expected fax volume. Read the plan details for how pages are counted and what happens after the allowance is used.
Questions people ask
Do fax APIs offer free plans?
Yes. FAX.PLUS and Faxxing list free plans. Check the provider’s terms and included pages before relying on a free tier.
Which fax APIs have trials?
Documo lists a 14-day trial, eFax 7 days, Fax² 30 days and Faxsuite 28 days.
Can I use a fax API on Android?
Android appears among the platforms in this category, but support is service-specific. Check the provider’s listed platforms before choosing.
What fax features should I compare?
Compare inbound and outbound faxing, delivery tracking, webhook events, API protocol and included pages, along with plan terms.
Is there a published paid-from price?
FAX.PLUS lists paid plans from $6.99 per month. Other services may require checking their current pricing details.