Here’s the criteria for a plugin (or a plugin company) to be listed:
- The copy protection must use either a serial number, a keyfile or a per user Watermark.
- The copy protection must not tie itself to anything. For example, there are now developers claiming they only use serial number copy protection, but then the copy protection ties itself to a particular CPU or other hardware. Another example is having just a serial number, but the software has to download required files from the vendor site in order to run. This is just as bad as challenge/response authentication. The software should not restrict you to using only the one computer. If you buy a new computer, you should be able to use it without dealing with the company further.
- The software should not require any form of calling home to authenticate or to obtain the plugin. In other words, if a company were to go out of business, you should be able to pull a copy of the software and serial number or keyfile off of your backup drive, and authenticate the software. Be wary of companies using a single installer for their entire lineup of products or of installers that have to download components from the vendor site to complete the install.
Please double-check and be sure before posting that the software plugins you list meet the above criteria!
For those considering purchasing software from vendors on this list, we recommend you write the vendor before purchase, and ask the above three questions to confirm the criteria is met. WARNING: Although we are trying to confirm that the above vendors meet the above three criteria items, we do not guarantee accuracy! We cannot be held responsible if a plugin does not actually meet the above listed criteria--this is a community effort. Check before buying!
I’ll start:
EDIT: I have now started appending this original post with those developers that we've determined to support the above criteria. This should make it easier for users to quickly scan everything in one place when seeking a new plugin to buy:
- 112dB
- 2cAudio
- Aberrant DSP
- ACMT Plugins
- Acon Digital
- Admiral Quality
- Apisonic Labs
- ApulSoft
- Auburn Sounds
- Audio Damage
- Audio Realism
- AudioThing
- Audiority / Polychrome DSP
- Blue Cat Audio
- Boz Digital Labs
- Cockos
- Darkpalace Studio
- DDMF
- Devious Machines
- DMG Audio
- DSPPlug
- eaReckon
- Eplex7 DSP
- FabFilter
- FMJ-Software
- https://fors.fm/
- Freak Show Industries
- Fuse Audio Labs
- GForce
- GuDa Audio
- HornetPlugins (demos needs a plugin manager with user and pw, while full versions don't)
- HY-Plugins
- Illformed.com
- imagiro
- Inear Display
- Inphonik
- KarmaFX
- Kazrog
- K-devices
- Kiive Audio
- Kilohearts
- Klanghelm
- Kuassa
- KV331
- LetiMix
- Loomer
- Madrona Labs
- MaizeSoft
- Martinic
- Melda Plugins - Uses a keyfile and an installation manager, but provides a zip of the download data for offline archival/backup use. These are good guys, and an example of how installation managers can be adapted to still protect consumer rights to back up and restore software if a company were to close down.

- MuTools
- Naskt Plugins
- NuSofting
- Pfundstein Audio Plugins
- Phonolyth
- Plogue
- Polyverse Music
- Psychic Modulation
- Reveal Sound
- Shy audio
- Sinevibes
- SirAudio
- Sonic Charge
- Sonic Projects
- SugarBytes
- Superwave
- Surreal Machines
- SynthEdit
- TBProAudio
- Tokyo Dawn Labs
- Tone2
- ToneBoosters
- Tone Projects
- TruePianos / 4Front Technologies
- U-he plugins
- Valhalla Plugins
- Venomode
- Volko Audio
- Voxengo
- Wusik
There has been questions regarding whether these companies really meet the criteria or not. This is a list of vendors that need to be confirmed that they meet the above listed criteria before being added to the official list:
- Cakewalk Dimension Pro - No longer sold; Can be purchased as a 2nd hand sale
- Waldorf
- Denise Audio