VisSim box

As VisSim was purchased by Altair and renamed to "Embed", the old VisSim Software Maintenance program has been replaced by Altair Units for Embed as described on

Product Upgrades and Updates

If you have active Altair Units, you are entitled to the bug-fix updates of the products for which you are licensed, as well as any version upgrades that occur during the term of the Altair Units period. You will also be entitled to free relicense of older VisSim products.

Technical Support

Online Technical support is available at the Altair Embed Forums. You are encouraged to post questions to the forums. You can also email

License Re-Activation

License re-activation of older v9 and earlier VisSim licenses due to crashed hard drive or lost computer now requires active Altair Units licensing.