The 7 Best Online Fax Services: Security, Speed & Cost Compared

We tested the top online fax providers. From the mobile-first simplicity of mFax.to to the enterprise power of RingCentral and eFax, here is what you need to know about HIPAA compliance, API reliability, and hidden pricing.

Frequently Asked Questions

Can I send a fax for free?
[Truly free services](/blog/best-6-free-fax-services/) usually add ads to your cover page or limit you to 1-2 pages per day. For professional use, utilize a free trial from Fax.Plus or the pay-as-you-go model from Phaxio.
Is mFax.to secure?
Yes, mFax.to utilizes standard encryption protocols (TLS) for transmission, making it significantly more secure than a traditional fax machine or unencrypted email.
Do I need a phone line?
No. These are 100% cloud-based. You send via a web browser, mobile app, or email client. The provider manages the phone lines on their server.
How does 'Email-to-Fax' work?
You simply compose an email. In the 'To' field, you type the recipient's fax number followed by the provider's domain (e.g., [email protected]), attach your PDF, and hit send. The service converts it to a fax.
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