Openfax Cloud Fax API
Openfax Cloud Fax API: A focused fax API for teams automating single sends, broadcasts, and inbound delivery. Ranked #7 of 26 in Fax APIs by our editors (8.7/10); pricing: Paid; best for teams sending broadcasts or mail-merge faxes.
At a glance
- Editor score8.7 / 10
- PricingPaid
- Best forTeams sending broadcasts or mail-merge faxes
- Free planNo
- Paid from$0.03/unit usage-based
- Inbound faxingYes
- Founded1999
- Facts checked20 Sep 2026
Where it wins
- Broadcasts faxes to multiple recipients from one submission
- Creates mail-merge fax broadcasts from DOCX templates
- Delivers results through reports, webhooks, email, or AWS S3
Where it doesn't
- No recurring API plans are listed
- Pricing is specified for US-48 and Canada
- Account number and API key authentication may require developer setup
Our verdict on Openfax Cloud Fax API
Openfax Cloud Fax API provides programmatic fax transmission for developers and organizations that need outbound sending, inbound fax numbers, delivery tracking, and automated result handling. Its scope covers single outbound fax submissions, multi-recipient broadcasts, DOCX-based mail-merge broadcasts, inbound fax number configuration, and reporting by transaction ID or date range. Teams managing recurring communications, document-driven fax workflows, or inbound document routing will find the feature set closely aligned with those needs. It is less suited to organizations seeking a general-purpose communications platform beyond fax transmission.
Pricing is usage-based rather than organized around recurring API plans. The Standard fax broadcast plan is listed at $0.03 per page for US-48 and Canada, while Mail merge services broadcast is listed at $0.04 per page for those regions. The published documentation also describes free developer trial credits after registration. Paid usage is therefore most relevant to teams that can estimate page volume and distinguish between standard broadcasts and DOCX mail-merge services. The company, Opfx, Inc., dates to 1999, adding an established operating history to the product's positioning.
Integration and workflow coverage are the main reasons to consider Openfax. HTTP endpoints support fax submission, balance queries, report retrieval, and delivery notifications, while webhook postbacks can return fax results. Received faxes can be delivered through email, AWS S3, or webhook postbacks, and outbound reporting supports transaction ID or date-range queries. Account-based authentication uses an account number and API key. Choose Openfax when broadcast delivery, mail merge, inbound numbers, and trackable API events are central requirements; choose an alternative when you need recurring subscription tiers or a broader communications suite.
Your product? Our editors can test Openfax Cloud Fax API in depth and publish a review, labelled as paid · from $149/mo →
Openfax Cloud Fax API pricing
All 2 Openfax Cloud Fax API plans and prices →
Openfax Cloud Fax API fact sheet
| Free plan | No |
|---|---|
| Paid from | $0.03/unit usage-based |
| Inbound faxing | Yes |
| Outbound faxing | Yes |
| Delivery tracking | Yes |
| Webhook events | Yes |
| API protocol | Not verified |
| Included pages | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Support | Email, Live chat, Phone, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 3 integrations: Email, AWS S3, Webhooks |
| Pricing | Paid (source) |
| Website | openfax.com |
| Facts checked | 20 Sep 2026 |
Openfax Cloud Fax API integrations
Openfax Cloud Fax API lists 3 integrations on its own site.
- AWS S3
- Webhooks
Alternatives to Openfax Cloud Fax API
- Telnyx Fax APIA low per-page REST fax API with inbound, outbound, tracking, and webhook support.9.4
- PhaxioA feature-rich fax API for sending, receiving, tracking, and routing documents.9.2
- FaxxingA practical free-start fax API with inbound support, signed webhooks, and usage-based pricing.9.1
See all Openfax Cloud Fax API alternatives →
Openfax Cloud Fax API vs the competition
- Openfax Cloud Fax API vs Telnyx Fax API
- Openfax Cloud Fax API vs Phaxio
- Openfax Cloud Fax API vs Faxxing
- Openfax Cloud Fax API vs Sinch Fax API
- Openfax Cloud Fax API vs OpenText Core Fax Management API
- Openfax Cloud Fax API vs Documo Fax API
Compare Openfax Cloud Fax API with any tool side by side →
Also Ranked In
Openfax Cloud Fax API is ranked in 2 of our directories.
Used Openfax Cloud Fax API? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Openfax Cloud Fax API for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Openfax Cloud Fax API is listed in our Fax APIs directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/openfax-cloud-fax-api/"><img src="https://www.itechguides.com/best/badge/openfax-cloud-fax-api.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update