Best SingleFax API Alternatives in 2026
The top SingleFax API alternatives are Telnyx Fax API, Phaxio and Faxxing: 15 fax APIs our editors would look at instead of SingleFax API, in our ranking order.
SingleFax API: A flexible fax API with strong developer tooling, but only 10 pages in its $9.99 monthly entry plan. Where it falls short: the $9.99 monthly entry plan includes only 10 pages..
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Best forHigh-volume developers needing low per-page pricing
A low per-page REST fax API with inbound, outbound, tracking, and webhook support.
- Webhook events
- Inbound faxing
- Outbound faxing
9.5/10★★★★★Visit Telnyx -
Best forDevelopers needing a feature-rich fax API
A feature-rich fax API for sending, receiving, tracking, and routing documents.
- Webhook events
- Inbound faxing
- Outbound faxing
8.8/10★★★★☆Visit Phaxio -
Best forBudget-conscious teams needing a free starting tier
A practical free-start fax API with inbound support, signed webhooks, and usage-based pricing.
- Webhook events
- Inbound faxing
- Outbound faxing
8.3/10★★★★☆Visit Faxxing -
Best forBusinesses wanting a mature programmable fax service
A mature REST fax API for adding inbound and outbound faxing to business applications.
- Webhook events
- Inbound faxing
- Outbound faxing
7.7/10★★★★☆Visit Sinch -
Best forHealthcare developers needing high-volume API capacity
A healthcare-focused REST fax API with inbound, outbound, tracking, and workflow tools.
- Webhook events
- Inbound faxing
- Outbound faxing
7.5/10★★★★☆Visit Documo -
Best forTeams sending broadcasts or mail-merge faxes
A focused fax API for teams automating single sends, broadcasts, and inbound delivery.
- Webhook events
- Inbound faxing
- Outbound faxing
7.4/10★★★★☆Visit Openfax -
Best forEnterprise teams needing governance and integrations
A mature REST and SOAP fax API suite for regulated, integration-heavy teams.
- Webhook events
- Inbound faxing
- Outbound faxing
7.1/10★★★★☆Visit OpenText -
Best forDevelopers needing REST, SOAP, and sandbox support
A developer-focused fax API with inbound, outbound, scheduling, and sandbox support.
- Webhook events
- Inbound faxing
- Outbound faxing
6.9/10★★★☆☆Visit Faxsuite -
Best forDevelopers wanting scheduled sending and webhooks
A scheduling-focused fax API with webhooks, tracking, and 600 included pages.
- Webhook events
- Inbound faxing
- Outbound faxing
6.7/10★★★☆☆Visit Send FAX Mail -
Best forTeams needing broad device and business integration
A paid REST fax API with two-way faxing, tracking, webhooks and six integrations.
- Webhook events
- Inbound faxing
- Outbound faxing
6.6/10★★★☆☆Visit GoFax -
Best forHealthcare enterprises needing AI and redundancy
A healthcare-focused fax API with AI workflows, integrations, audit trails, and redundancy.
6.5/10★★★☆☆Visit ETHERFAX -
Best forSmall businesses needing affordable two-way faxing
Affordable two-way faxing with API access, flexible minute-based plans, and HIPAA support.
6.4/10★★★☆☆Visit FAXAGE -
Best forOccasional senders needing simple REST faxing
Simple pay-as-you-go REST faxing for occasional senders.
- Webhook events
- Inbound faxing
- Outbound faxing
6.3/10★★★☆☆Visit SendFax.me -
Best forAPI users seeking a trial and included monthly pages
A focused fax API with inbound and outbound workflows, document conversion, and a trial.
- Inbound faxing
- Outbound faxing
- Delivery tracking
6.2/10★★★☆☆Visit Fax² API -
Best forSmall teams wanting broad fax workflows and apps
A broad fax platform with API access, apps, integrations, and flexible monthly plans.
6.1/10★★★☆☆Visit FAX.PLUS
SingleFax API Alternatives: Common Questions
What is the best alternative to SingleFax API?
Telnyx Fax API: #1 in our Fax APIs ranking, with an editor score of 9.5 out of 10. A low per-page REST fax API with inbound, outbound, tracking, and webhook support.
Is there a free alternative to SingleFax API?
Yes. Faxxing and FAX.PLUS have a free plan or a free tier.
What is the cheapest paid alternative to SingleFax API?
Of the alternatives here that publish a price, Phaxio starts lowest, at $2/mo.
SingleFax API vs Each Alternative
| # | Tool | Free plan | Paid from | Inbound faxing | Outbound faxing | Delivery tracking | Webhook events | Score |
|---|---|---|---|---|---|---|---|---|
| 13 | SingleFax API | No | $9.99/mo | Yes | Yes | Yes | Yes | 6.4 |
| 1 | Telnyx Fax API | No | — | Yes | Yes | Yes | Yes | 9.5 |
| 2 | Phaxio | No | $2/mo | Yes | Yes | Yes | Yes | 8.8 |
| 3 | Faxxing | Yes | — | Yes | Yes | Yes | Yes | 8.3 |
| 4 | Sinch Fax API | No | — | Yes | Yes | Yes | Yes | 7.7 |
| 5 | Documo Fax API | No | — | Yes | Yes | Yes | Yes | 7.5 |
| 6 | Openfax Cloud Fax API | No | — | Yes | Yes | Yes | Yes | 7.4 |
| 7 | OpenText Core Fax Management API | — | — | Yes | Yes | Yes | Yes | 7.1 |
| 8 | Faxsuite REST API | No | — | Yes | Yes | Yes | Yes | 6.9 |
| 9 | Send FAX Mail API | No | $12.99/mo | Yes | Yes | Yes | Yes | 6.7 |
| 10 | GoFax REST API | No | — | Yes | Yes | Yes | Yes | 6.6 |
| 11 | ETHERFAX | — | — | — | — | — | — | 6.5 |
| 12 | FAXAGE | No | $3.49/mo | — | — | — | — | 6.4 |
| 14 | SendFax.me Developer API | No | — | Yes | Yes | Yes | Yes | 6.3 |
| 15 | Fax² API | No | — | Yes | Yes | Yes | — | 6.2 |
| 16 | FAX.PLUS | Yes | $6.99/mo | — | — | — | — | 6.1 |
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
Last updated · How we research and update