mda Talkbox is described as 'Part of the open-source toolkit from mda, Talkbox is a high resolution VST vocoder effect. The plugin doesn't have a GUI but relies on the app used to host it' and is an app in the Audio & Music category. There are four alternatives to mda Talkbox for Windows, Mac, FL Studio, iPad and iPhone. The best alternative is Vocodex. It's not free, so if you're looking for a free alternative, you could try TAL-Vocoder. Other great apps like mda Talkbox are Vocalizer Pro (Paid) and VoxSyn (Paid).
Vocodex is a stunning, high quality vocoder available in VST and native FL Studio plugin formats. FEATURES Speech enhancement contouring of noise or modulator pass-through. Modulator noise reduction to reduce ambient noise bleeding through carrier.
TAL-Vocoder is a VST/AU plugin that emulates the sound of vintage vocoders from the early 80s. It provides 11 bands and users analog modeled components in combination with digital algorithms such as the SFFT (Short-Time Fast Fourier Transform).