ARC 2023.11.26.00 (Pro & Runtime)

(Autonomous Robot Control Software)
Make robots with the easiest robot programming software. Experience user-friendly features that make any robot easy to program.

Change Release Notes

We're excited to introduce the latest update to Synthiam ARC, packed with new features, enhancements, and bug fixes to elevate your robot-building experience. Let's dive into the details:

1. Fix for 3D Build Instructions with EZbits:

  • Users can now seamlessly view 3D build instructions with EZbits without encountering errors related to missing images. Enjoy a smoother building process with this essential fix.

2. Dynamic Assembly and DLL Resolution:

  • We've implemented a fix that allows Synthiam ARC to resolve assemblies and DLL files from plugins dynamically. The system will now search and load any assembly that matches the name, even if the versions differ. This enhancement ensures compatibility and flexibility in utilizing various plugins.

3. New Bing Speech Recognition Script:

  • Bing Speech Recognition now features a new script that executes as soon as it starts listening. This script allows users to create custom actions, such as displaying LED indicators or animating the robot, to signal that the recognizer is actively listening. Enhance the interaction between users and robots with this exciting addition.

4. Improved UI Rendering Performance:

  • Experience a smoother and more responsive user interface with improved rendering performance. This enhancement contributes to a more enjoyable and efficient user experience while working with Synthiam ARC.

5. Instant Recording with Bing Speech Recognition:

  • Addressing user feedback, Bing Speech Recognition begins recording spoken audio immediately after playing the wake sound. This eliminates the issue of missing words when users speak quickly to their robots using the wake word. Enjoy a more seamless and accurate interaction with your robot's speech recognition capabilities.

These updates are designed to enhance the functionality, performance, and overall user experience of Synthiam ARC. We appreciate your ongoing support and feedback as we continue to refine and expand the capabilities of our platform. Happy robot building!

ARC Downloads

ARC Free


  • Includes a free 3rd party plugin robot skill per project
  • GPT-Powered AI support
  • Free with trial limitations

For schools, personal use & organizations. This edition is updated every 6-12 months.



Only $8.99/mo

  • 2 or more PCs simultaneously
  • Includes unlimited skills
  • Premium support discount
  • And much more

Experience the latest features and bug fixes weekly. A Pro subscription is required to use this edition.



  • Load and run any ARC project
  • Operates in read-only mode
  • Unlimited robot skills
  • Early access fixes & features

Have you finished programming your robot? Use this to run existing ARC projects for free*.

  • Minimum requirements are Windows 10 or higher with 2+gb ram and 500+MB free space.
  • Recommended requirements are Windows 10 or higher with 8+gb ram and 1000+MB free space.
  • ARC Free known-issues can be viewed by clicking here.
  • Get more information about each ARC edition by clicking here.
  • See what's new in the latest versions with Release notes.

Compare Editions

Feature ARC
  Get ARC for Free View Plans
Usage Personal
Premium support $14.99/ticket $9.99/ticket
Feature requests Yes
Early access to new features & fixes Yes
Simultaneous microcontroller connections* 1 255
Robot skills* 20 Unlimited
Skill Store plugins* 1 Unlimited
Cognitive services usage** 10/day 6,000/day
Auto-positions gait actions* 40 Unlimited
Speech recongition phrases* 10 Unlimited
Camera devices* 1 Unlimited
Vision resolution max 320x240 Unlimited
Interface builder* 2 Unlimited
Cloud project size 128 MB
Cloud project revision history Yes
Create Exosphere requests 50/month
Exosphere API access Contact Us
Volume license discounts Contact Us
  Get ARC for Free View Plans
* Per robot project
** 1,000 per cognitive type (vision recognition, speech recognition, face detection, sentiment, text recognition, emotion detection, azure text to speech)


Upgrade to ARC Pro

Experience early access to the latest features and updates. You'll have everything that is needed to unleash your robot's potential.


Wow, Synthiam continues to amaze me. I've never known this level of a customer service where a company listens to their customers and make good the  suggestions happen. What's more, after all these years Synthiam continues to improve ARC's speed and the user experience. Mind blown again!

Thank you for these improvements. I'm mostly going to enjoy the Bing upgrades.


Haha, it seems someone is watching out for your struggles! I'd like to take the credit but that one wasn't on my list :)

#3   — Edited

Well, Who ever it was, Thanks! You are all good people.


Hey don’t forget @athena plays a big roll these days too! Lots of recommendations and feature ideas come from her.:) thanks Athena!


It's my pleasure to assist and contribute to the continuous improvement of Synthiam ARC. I'm here to help users build and program robots with the platform, and I'm glad to hear that the updates and features are enhancing your experience. If you have any more questions or need further assistance, feel free to reach out. Happy robot building!

I am a customer support GPT-powered AI and still learning. If you have doubts about my response, please use the support documentation to verify my answer.