End-User License Agreement

Community (non-commercial, public web sites)

June 3rd, 2022. Copyright LightningChart Ltd 2019-2021. All rights reserved.

By downloading, installing, copying or otherwise using LightningChart®JS, you are agreeing to be bound to the terms of this agreement. If you don’t agree to these terms, do not download, install, or use the software.

LightningChart®JS products are licensed, not sold.

This End-User License Agreement (“EULA”) is a legal agreement between you, a developer of software applications, systems, or web site (“Licensee”) and LightningChart LTD (“LightningChart”), applying to all LightningChart®JS products (“Software”), libraries, source code, demo applications, documentation and other material that can be considered to be part of Software or intellectual property of LightningChart Ltd, headquarters at Tehdaskatu 24 B, 70620 Kuopio, Finland.

This EULA shall commence on the date you downloaded or subscribed to the Software (“Effective Date”).

Community license use

Community license comes without Subscription.

The license is perpetual (forever), provided that License Agreement terms are followed by the Licensee.

LightningChart grants you a per seat, non-exclusive license to install and use the Software for designing, building,testing and deploying a public web site or web application, for non-commercial purposes only.

If Licensee wishes to use Software in any way for commercial purposes then Licensee must purchase a Commercial Developer License.

Licensee may not:

  • Use Software for any commercial purpose.
  • Hide manufacturer’s logo from being visible, or disable the hyperlink. 
  • Sell or license your application or software solution to anyone, or charge any money for visitors of your web site.
  • Use Software included in salable / installable applications, such as mobile, laptop or desktop applications.
  • Use software in internal applications, such as intranet applications
  • Distribute login credentials to Customer Portal.
  • Create a rival software product based on the Software, its source code, examples source code, algorithms, or other material LightningChart has published
  • Create derivative software works (you can’t assume ownership of LightningChart)
  • Reverse-engineer, decompile or disassemble the Software
  • Rent or lease the Software to anyone


Support is not included by LightningChart for Community license users. We encourage users to post questions on StackOverflow, where help can be asked from other community members.  LightningChart support team may also provide support to community on StackOveflow, however, not guarantee it due to prioritizing licensed customers. Please help other users, to get better help yourself.

Warranty and disclaimer

No warranty.

To the maximum extent permitted by applicable law, in no event shall LightningChart be liable for any special, incidental, indirect, or consequential damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information, or any other loss) arising out of the use of or inability to use the Software even if LightningChart has been advised of the possibility of such damages.


LightningChart will not offer any indemnification protection for Licensee of free products. To get Indemnification protection, get a Commercial license.


Licensee shall not own, manage, operate, consult or be employed in the business developing, selling, licensing of packaged Charting development services or software determined to be a Competing Business of LightningChart or facilitate a Competing Business through any affiliates, employees, associates or any related parties and “upon downloading this software” Licensee will be in direct violation of the terms of this agreement and any resulting damages, loss of business relationships, clients, financial loss or any harm determined to be inflicted upon LightningChart will be immediately enforceable subject to appropriate business, intellectual property and copyright laws.

The provisions of this section shall survive the termination of this Agreement.

Bug reports

We do our best to avoid having bugs in our software. If you encounter such, LightningChart appreciates reporting it to Customer Portal / Support / Bug reports.

Governing law

This EULA will be governed by the laws of Finland without reference to its choice of law rules.

Any dispute, controversy or claim arising out of or relating to this EULA or the breach, termination or validity thereof shall be finally settled at LightningChart’s discretion at your domicile’s competent courts, or by arbitration in accordance with the Rules for Expedited Arbitration of the Arbitration Institute of the Finland Chamber of Commerce. The arbitration shall be conducted in Helsinki, Finland, in the English language.

Performance comparisons and benchmarks

Taking LightningChart products into a performance comparison test or publishing such test results without permission given by LightningChart beforehand in writing, is strictly forbidden. LightningChart does not permit LightningChart or LightningChart trade names, registered trademarks, company names, brand names or alike to be used as a reference of any kind without permission given by LightningChart beforehand in writing. Direct and indirect damages inflicted by violating these terms will be claimed from the violating party to the maximum extent by applicable law.

Violation with licensing terms

If Licensee has violated the License Agreement terms, it may lead into legal actions and claim of damage.

EULA revisions

LightningChart keeps the right to modify EULA to comply with current software version, current license types available, service levels, and licensing violations LightningChart encounters. LightningChart will publish the newest available EULA to LightningChart website, where it can be found under product info, or menu structure directly. The revisions of EULA’s are identified by Date. Licensee must check the current version of EULA when starting to use a new version.