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SendFax.to
Appleton, Wisconsin, USA
What it is
SendFax.to is a cloud fax service for sending and receiving faxes through email and supported fax numbers. Users can email PDF, PNG, IMG, or DOC attachments to a destination address at sendfax.to and receive delivery-status confirmation by email. Incoming faxes can be delivered to up to two email addresses, and each fax-capable DID can be associated with up to 100 authorized email addresses or domains. Users can scan multiple pages on a mobile device and send from a computer, tablet, or smartphone. Multifunction printers can send through scan-to-email and print incoming faxes through email-to-print; inbound faxes can also route to T.38-compatible PBXs, ATAs, and gateway devices. The API supports sending, fax information, and inbound or outbound callbacks; callback URLs must use HTTPS. An optional SendFax.to Device connects up to two physical fax machines. The service is paid from $17.99/mo and has no free plan. The maker's brochure describes automatic encryption and password protection for inbound fax delivery and says this ensures HIPAA compatibility.
For and against
For
- Send and receive faxes through email
- Supports PDF, PNG, IMG, and DOC attachments
- Can route inbound faxes to compatible PBXs and gateways
- API supports fax callbacks over HTTPS
Against
- No free plan
- Starts at $17.99/mo
- Inbound faxes go to up to two email addresses
The verdict
SendFax.to offers email-based faxing alongside API, printer, and compatible PBX routing options. It is a paid service starting at $17.99/mo, with no free plan.
Who it suits
SendFax.to suits businesses that want to fax without relying on a traditional landline fax machine. Its email, printer, API, and PBX routing options may suit organizations with different fax workflows.
Plans and prices
Metered Fax Bursting
Optional extra fax capacity · additional call paths
Read 15 Oct 2026 · kb.clearlyip.com
High Volume Faxing
2,000 fax minutes · approximately 3,000–3,500 pages/month · 1 concurrent fax per call path
Read 15 Oct 2026 · clearlyip.com
Low Volume Faxing
300 fax minutes · approximately 400–500 pages/month · 1 concurrent fax per call path
Read 15 Oct 2026 · kb.clearlyip.com
On the record
- API
- The REST API sends outbound faxes, returns fax information and supports inbound and outbound callbacks.kb.clearlyip.com · read 15 Oct 2026
- API callbacks
- Callback endpoints must use HTTPS and receive POST requests containing JSON fax status data.kb.clearlyip.com · read 15 Oct 2026
- API specification
- An OpenAPI specification is published at fax.sendfax.to/faxapi/v1/openapi.yaml.kb.clearlyip.com · read 15 Oct 2026
- Appliance
- The optional SendFax.to appliance connects up to two physical fax machines through two FXS ports.kb.clearlyip.com · read 15 Oct 2026
- Appliance retry behavior
- The appliance retries inbound delivery 10 times and attempts cloud upload up to 20 times before reporting failure.kb.clearlyip.com · read 15 Oct 2026
- Authorized senders
- Each fax-enabled DID can authorize up to 100 email addresses or domains for outbound faxing.clearlyip.com · read 15 Oct 2026
- Company
- ClearlyIP says it serves businesses, ITSPs, OEMs, and communications providers with telecommunications services, applications, and customer-premise hardware.clearlyip.com · read 7 Oct 2026
- Company acquisitions
- Crunchbase reports that ClearlyIP has acquired two organizations.crunchbase.com · read 15 Oct 2026
- Company founded
- LinkedIn lists ClearlyIP as founded in 2019.linkedin.com · read 15 Oct 2026
- Company headquarters
- ClearlyIP is headquartered in Appleton, Wisconsin, United States.linkedin.com · read 15 Oct 2026
- Company legal name
- Crunchbase lists the legal entity as Clearly IP Inc.crunchbase.com · read 15 Oct 2026
- Company ownership
- LinkedIn identifies ClearlyIP as privately held.linkedin.com · read 15 Oct 2026
- Company size
- LinkedIn lists ClearlyIP’s company size as 201–500 employees.linkedin.com · read 15 Oct 2026
- Delivery confirmation
- Senders receive an email reporting the fax delivery status.clearlyip.com · read 15 Oct 2026
- Documentation depth
- The knowledge base includes purchasing, inbound and outbound email faxing, printer setup, API faxing, T.38 configuration and appliance guides.kb.clearlyip.com · read 15 Oct 2026
- Email sending
- Users can email fax attachments to a destination address at sendfax.to, and receive an email delivery status confirmation.clearlyip.com · read 7 Oct 2026
- Fax appliance
- The optional SendFax.to Device supports connecting up to two physical fax machines to the platform.clearlyip.com · read 7 Oct 2026
- Hardware news
- ClearlyIP announced the SendFax.to Device on June 17, 2021 for connecting analog fax machines to its cloud service.clearlyip.com · read 15 Oct 2026
