Fax API

Modern, secure faxing at scale

Send and receive faxes securely and reliably with our agile, developer-friendly fax API.

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Join over 150,000 businesses, including 8 of the 10 largest tech companies in the world.

100%

Uptime reliability.

26M

Fax pages transmitted per month.

7M

Faxes transmitted per month.

160k

Active phone numbers.
Image for Keep your business running and drive higher revenue

Keep your business running and drive higher revenue

Our cloud-based fax service allows you to transfer documents securely and reliably via our powerful API. Integrate it into your workflow to easily let your customers confidently share medical records, legal documents, real estate contracts, or receive food orders.

  • Flexible and scalable — As businesses move away from servers and hardware, our industry-leading API allows companies to drive more value by leveraging software in the cloud.

  • Reliability and performance — Sit back and relax. We’ve got a consistent track record of excellent deliverability and support.

  • Always secure — Our certifications achieved through independent audits enable us to support your security and privacy compliance needs, including HIPAA, SOC 2, PCI, and GDPR.

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Image for Reliability is key — and we get it

Reliability is key — and we get it

Fax reliability is critical in today’s information-driven businesses. Our fax API is designed to deliver every single fax reliably — no matter your industry, business type, size, or volume.

Quickly turn up fax service on phone numbers and send calls to us over our SIP network for fax processing. Your fax messages will be carried over our redundant network infrastructure, giving you trustworthy and total coverage in the U.S.

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Scale up your faxing with ease

Our infrastructure is designed for high volumes and automatically scales to handle nearly infinite call paths. We have a number inventory of millions of local or toll-free numbers you can choose from — or you can also bring your own!

From constant stream of transmissions to sudden bursts, we can help you manage your daily faxing needs efficiently and securely and scale as day-to-day demands increase.

In other words, you’re in good hands with Sinch!

Self-serve, scalable faxing designed for performance — and backed by experts

Simple dashboard

Easily keep track of the send and receive time plus status of your faxes.

Automatic retries

Eliminate manual resends of failed faxes resulting from busy lines and other fax-related errors.

Simple administration

Create and manage users, groups, roles, and permissions from our customer portal. Plus, make number porting requests in real time!

Transparent pricing

Pay per page with no hidden charges, setup, or monthly fees. Volume pricing is also available.

Quick activation

Set up your account in minutes and start sending faxes in no time!

Multiple file formats

Our solution supports DOC, DOCX, PDF, TIF, JPG, ODT, TXT, and PNG, but also URL or HTML files for fetching or rendering from the API.

What are you waiting for?

Let’s help you get started!