Short answer: Harmony Engine gives you four voices for $150 or $17.50 a month. RysUpHarmony gives you eight for $29.99, once.
What Harmony Engine does
Four independently adjustable harmony voices, each with its own timbre, vibrato, panning and octave, and Choir technology that enriches each voice with 2, 4, 8 or 16 more. You can arrange notes by hand, play them from MIDI, or pick chords and let it voice them, and it integrates with Auto-Key 2. The Choir thickening is the genuinely distinctive part.
It listed at $150 on 3 September 2026, down from $250, or $17.50/month. At the monthly rate you pay more than RysUpHarmony's entire price every two months, forever.
The rest of the category
Waves Harmony — $199 list, $39.99 on 3 September 2026
Twice the independent voices of Harmony Engine, three workflows, 450+ presets — at a list price that gets discounted 80% often enough that the list price is decoration.
iZotope Nectar 4 (Voices) — $199 minimum
Harmony only as a module of a full vocal suite, never sold separately.
RysUpHarmony — $29.99
Eight voices. Twenty-nine ninety-nine. Every week, not just sale week.
Every other harmoniser in this category asks somewhere between five and ten times that, or asks for a monthly payment that never ends. RysUpHarmony is one price, paid once, and it does the thing they all do — with the one control none of them give you.
You see what every voice sings on every note
The others hand you a preset browser and a chord mode. RysUpHarmony puts the whole map on screen: one row per voice, one column per note you might sing, and the cell where they meet is the interval that voice takes. A third on the verse root, a fifth where the melody turns, unison where you want thickness instead of harmony. Click a cell and change it. That is the whole workflow, and nothing else in the category exposes it.
Everything the expensive ones have
- 8 independent voices — matching the most expensive plugin in the category, double what Antares gives you
- Chord following — each voice takes a role in the chord it hears from a sidechain, MIDI, or its own song map
- 125 factory stacks — tight pop thirds, gospel walls, indie fifths, choir pads, doubler beds, jazz sevenths
- Per-voice level, pan, formant, tone, timing drift and pitch drift — so eight voices sound like eight singers, not one voice copied eight times
- Unison voices double you instead of retuning you, so a doubler thickens the lead rather than fighting it
- macOS and Windows, AU / VST3 / AAX, no iLok, no dongle, no subscription
It is also included with the Rys Up Suite, along with every paid plugin we release while your access is active.
The bottom line
Every plugin on this page makes vocal harmonies. Only one of them costs $29.99 every day of the year, gives you eight voices, and lets you decide what each voice sings on each note instead of hunting for a preset that nearly fits.
Competitor prices were read from each vendor's own product page on 3 September 2026. Waves and Antares were both discounting that day, and their sale prices move constantly — ours does not.