ICTFax REST API
ICTFax REST API: A flexible open-source fax server for developers and service providers. Ranked #14 of 23 in Fax Server Software by our editors (7.7/10); pricing: Free plan; best for developers and providers building fax services.
At a glance
- Editor score7.7 / 10
- PricingFree plan
- Best forDevelopers and providers building fax services
- Free planYes
- Deployment modelOn_premises
- Facts checked20 Sep 2026
Where it wins
- REST APIs cover sending, receiving, and transmission status tracking
- Supports email, web, T.38, G.711, PSTN, and ATA fax workflows
- Open-source self-hosting with routing and multi-tenant capabilities
Where it doesn't
- Self-hosted deployment requires organization-controlled infrastructure
- AI features are not included
- Advanced multi-tenant and white-label capabilities require the Service Provider Edition
Our verdict on ICTFax REST API
ICTFax REST API is an open-source fax server for businesses, developers, and service providers that need to send and receive faxes through software, email, or web workflows. Its REST APIs cover fax transmission, document handling, status tracking, and DID or extension management. The platform runs on infrastructure controlled by the deploying organization and supports web, Linux, API, Chrome extension, and self-hosted environments. It is particularly suited to teams building fax services or integrating fax into existing communications systems.
The Community Edition costs $0 and includes the open-source fax server, REST API support, email-to-fax, fax-to-email, web-to-fax, and self-hosted deployment. Its transport and gateway coverage is broad for a fax platform: T.38 and G.711 support, PSTN fax gateways, ATA devices, fax extensions, DID assignment and forwarding, activity reports, and transmission status tracking are all part of the feature set. The Service Provider Edition adds white-label support, multi-tenant support, and hosted fax service capabilities, making the edition split relevant for providers serving multiple organizations.
Its strongest fit is an organization that can manage infrastructure and wants control over fax routing, telephony connections, and API-based workflows. Integrations with FreeSWITCH, ICTCore, SIP trunks, T.38, G.711, PSTN gateways, and ATA devices support deployments that already use those components. The trade-off is operational responsibility: this is not positioned as a simple hosted fax inbox, and AI features are not included. Choose ICTFax REST API when self-hosting, extensibility, and service-provider functions matter; choose an alternative if you want a narrower, managed fax experience with less infrastructure involvement.
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ICTFax REST API pricing
All 2 ICTFax REST API plans and prices →
ICTFax REST API fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Deployment model | On_premises |
| Modem or gateway support | Yes |
| Fax routing rules | Yes |
| Email fax workflow | Yes |
| Searchable fax archive | Not verified |
| Concurrent fax channels | Not verified |
| Deployment | Self-hosted |
| Platforms | Web, Linux, Chrome extension |
| Support | Email, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 7 integrations: FreeSWITCH, ICTCore, SIP trunks, T.38, G.711, PSTN gateways … |
| Pricing | Free plan (source) |
| Website | ictfax.org |
| Facts checked | 20 Sep 2026 |
ICTFax REST API integrations
ICTFax REST API lists 7 integrations on its own site.
- FreeSWITCH
- ICTCore
- SIP trunks
- T.38
- G.711
- PSTN gateways
- ATA devices
Alternatives to ICTFax REST API
- OpenText Fax (RightFax)A deployment-flexible fax platform for complex, regulated document workflows.9.4
- Esker VSI-FAXA mature on-premises fax server for high-volume workflows and complex routing.9.1
- FaxCoreA flexible enterprise fax server with strong archiving, routing, and integration options.8.9
See all ICTFax REST API alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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