Freedom251 › Visual Effects Software
Isadora
What Isadora is
Isadora combines a media server for video and audio processing with a visual programming environment for playback and interactive work. It supports video playback and effects, multichannel audio, and real-time processing of video, lighting, sound, and data. Its node-based environment integrates JavaScript, GLSL, and Python; the Pythoner actor can run scripts and import libraries. Uses described by TroikaTronix include show cueing, projection mapping, remote performance, and sensor-driven installations. Isadora can interface with other performance software and hardware, while IzzyCast transmits video, audio, and data between computers running Isadora. Version 4.5 supports VST audio effects and VSTi instrument plugins on macOS and Windows. Isadora 4 supports 64-bit Windows 10 through 11 and macOS 10.14 through macOS 26.x on Intel or Apple silicon. Demonstration Mode is free, but saving changes to new or existing files is disabled. Paid options include a $17.50 7-day rental, a $199.00 per year subscription, and perpetual licenses. Online subscription and rental licenses require internet access for initial activation; USB Key licenses do not.
Who it suits
Isadora may suit performers and media artists working with playback, projection mapping, show cues, or sensor-driven installations. It is available for macOS and Windows, with a free demonstration mode that cannot save changes.
What it does well
- Node-based environment integrates JavaScript, GLSL, and Python
- Supports multichannel audio and real-time media processing
- Version 4.5 supports VST and VSTi plugins
- USB Key license does not require internet access
What to know first
- Demonstration Mode cannot save changes
- Rental and subscription licenses require internet for initial activation
- Perpetual license is listed at $725.00
Limits
Demonstration Mode is free but cannot save changes to new or existing files. Seven-day and 30-day rentals work on one computer at a time; the yearly subscription activates Isadora on up to two computers at a time.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Isadora 7-Day Rental | US$17.50 · works with Isadora 3 and 4 · one computer at a time | $17.50, paid once |
| Isadora Yearly Subscription | US$199.00 (billed every year) · activates Isadora 3 and/or 4 on up to two computers at a time | $199 a year |
| Isadora 30-Day Rental | US$30.00 · works with Isadora 3 and 4 · one computer at a time | $30, paid once |
| Isadora 3 to Isadora 4 upgrade | US$325.00 · for existing Isadora 3 Perpetual or USB Key License holders | $325, paid once |
| Isadora 4 Perpetual | US$725.00 · two years of free updates · activates on up to two computers, runs on one at a time | $725, paid once |
| Isadora 4 USB Key | US$875.00 (US$725.00 license + US$150.00 USB key & shipping) · two years of free updates · physical USB key · does not require internet connection | $875, paid once |
As troikatronix.com lists them, read 8 Oct 2026. The maker's own page has the final word.
Getting started
- Open the Isadora website
- Choose Demonstration Mode or a rental, subscription, perpetual, or USB Key license
- Install Isadora 4 on a supported Windows or macOS computer
- Activate an online license with an internet connection, or use the USB Key license
- Build a project in the node-based environment
- Connect media, performance hardware, plugins, or IzzyCast as needed
Verdict
Isadora combines media processing with a visual programming environment for interactive work on macOS and Windows. The free mode has a save restriction, so review the available rental and license terms before choosing.
Questions
Is Isadora free?
Demonstration Mode is free to use, but saving changes is disabled. Paid rentals, subscriptions, upgrades, and licenses are also available.
What platforms does Isadora support?
Isadora 4 supports 64-bit Windows 10 through 11 and macOS 10.14 through macOS 26.x on Intel or Apple silicon.
How much does Isadora cost?
The 7-Day Rental costs $17.50 once, the 30-Day Rental costs $30.00 once, the yearly subscription costs $199.00 per year, and Isadora 4 Perpetual costs $725.00 once.
Does Isadora support Python?
Yes. Its node-based environment integrates Python, and the Pythoner actor can execute scripts and import libraries.
Can it use audio plugins?
Isadora 4.5 supports VST audio effects and VSTi instrument plugins on macOS and Windows.
Does activation require internet?
Online subscription and rental licenses require internet for initial activation. USB Key licenses do not require an internet connection.
Facts from Isadora's own pages
- Company location
- TroikaTronix lists Mark Coniglio at Neue Schönhauser Straße 12, 10178 Berlin, Germany. · troikatronix.com, 8 Oct 2026
- Creative uses
- The maker describes uses including show cueing, projection mapping, remote performance, and sensor-driven installations. · troikatronix.com, 8 Oct 2026
- Education
- The maker says more than 100 universities include Isadora in their curriculum and advertises a 50% discount for students and educators on its product page. · troikatronix.com, 8 Oct 2026
- Free use limit
- Demonstration Mode is free and permits use of the software, but saving changes to new or existing files is disabled. · support.troikatronix.com, 8 Oct 2026
- Headquarters
- Berlin, Germany · troikatronix.com, 28 Sept 2026
- Integrations
- The maker describes IzzyCast for transmitting video, audio, and data between computers running Isadora, and says Isadora can interface with other performance software and hardware. · troikatronix.com, 8 Oct 2026
- License activation
- Online subscription and rental licenses require an internet connection for initial activation; USB Key licenses do not require an internet connection. · support.troikatronix.com, 8 Oct 2026
- Programming
- Isadora's node-based environment integrates JavaScript, GLSL, and Python, and its Pythoner actor supports script execution and library imports. · troikatronix.com, 8 Oct 2026
- Purpose
- Isadora combines a media server video and audio processing engine with a visual programming environment for media playback and interactive work. · troikatronix.com, 8 Oct 2026
- Security and privacy
- TroikaTronix's privacy notice says it uses technical and organizational measures under GDPR Article 32 to protect data confidentiality, integrity, and availability. · troikatronix.com, 8 Oct 2026
- Support
- The maker provides a support site with ticket submission, license help, technical support articles, and tutorials. · support.troikatronix.com, 8 Oct 2026
- Supported systems
- Isadora 4 supports 64-bit Windows 10 through 11 and macOS 10.14 through macOS 26.x on Intel or Apple silicon processors. · troikatronix.com, 8 Oct 2026
- Video and sound
- Isadora supports video playback and effects, multichannel audio, and real-time processing of video, lighting, sound, and data. · troikatronix.com, 8 Oct 2026
- VST support
- Isadora 4.5 supports VST audio effect and VSTi instrument plugins on macOS and Windows. · support.troikatronix.com, 8 Oct 2026
Where Isadora stands on Freedom251
- Visual Effects Software#11 of 37