Hi Carina,

I can confirm that there are no costs to using Mbed TLS in your product as long as you are adhering to the licensing terms.

Best regards,
Janos
(Mbed TLS developer)


From: Carina Tsai via mbed-tls <mbed-tls@lists.trustedfirmware.org>
Date: Friday, 17 October 2025 at 09:31
To: mbed-tls@lists.trustedfirmware.org <mbed-tls@lists.trustedfirmware.org>, shaun.longhorn@linaro.org <shaun.longhorn@linaro.org>
Cc: Ken Chen <Ken.Chen@netgear.com>, MH Cheng <mh.cheng@netgear.com>
Subject: [mbed-tls] Re: TrustedFirmware.org - Check for MbedTLS License/Royality fee for commercial usage

To whom it may concern,

 

Our engineering team is using the Mbed TLS library in our wifi range extenders sold on markets and adhere to the licensing terms outlined in the sourcecode and docs. Thanks to Shaun’s guideline, it would be no royalty if we adhere to the licensing terms. Is there any other cost required for us to use the Mbed TLS library in our wifi range extenders, adhering to the licensing terms outlined in the sourcecode and docs?

 

Thank you

 

Carina

From: Shaun Longhorn <shaun.longhorn@linaro.org>
Sent: Tuesday, September 30, 2025 7:08 PM
To: Ken Chen <Ken.Chen@netgear.com>
Cc: enquiries@trustedfirmware.org
Subject: Re: TrustedFirmware.org - Check for MbedTLS License/Royality fee for commercial usage

 

 

External Email. Be cautious clicking attachments and links. Report suspicious to reportphishing@netgear.com.

Hi Ken,

 

I'm the Community Manager at Trusted Firmware. I can't advise you directly on your licensing situation but I can point you towards the documentation. 

 

Mbed TLS is an open source community project and no royalty is required. You must adhere to the licensing terms outlined in the sourcecode and docs: 

https://github.com/Mbed-TLS/mbedtls?tab=readme-ov-file#license 

https://mbed-tls.readthedocs.io/en/latest/kb/licensing/ 

 

You can also reach out to the Mbed-TLS community on the following public mailing list. https://lists.trustedfirmware.org/mailman3/lists/mbed-tls.lists.trustedfirmware.org/ 

 

I should highlight our optional memberships for Trusted Firmware detailed on this page. https://www.trustedfirmware.org/join/ membership has a number of benefits detailed in the slides. It could be beneficial in terms of lab testing and project visibility. If you have an interest we can arrange a call with the Co-Chairs and discuss benefits in more detail.

 

Thanks,

Shaun

Community Manager

 

 

On Tue, 30 Sept 2025 at 09:20, 'Ken Chen' via TFenquiries <enquiries@trustedfirmware.org> wrote:

Dear Sir/Madam,

 

I am reaching out to inquire about the licensing terms and any potential royalty fees associated with using the Mbed TLS library in our commercial products.

I was unable to find a specific contact point for this type of query.

Could you kindly forward this message to the appropriate person or team for further discussion?

Thank you for your assistance.

 

Best regards

Ken

 

This e-mail, including attachments, may include confidential and/or proprietary information, and may be used only by the person or entity to which it is addressed. If the reader of this e-mail is not the intended recipient or his or her authorized agent, the reader is hereby notified that any dissemination, distribution or copying of this e-mail is prohibited. If you have received this e-mail in error, please notify the sender by replying to this message and delete this e-mail immediately.

This e-mail, including attachments, may include confidential and/or proprietary information, and may be used only by the person or entity to which it is addressed. If the reader of this e-mail is not the intended recipient or his or her authorized agent, the reader is hereby notified that any dissemination, distribution or copying of this e-mail is prohibited. If you have received this e-mail in error, please notify the sender by replying to this message and delete this e-mail immediately.