Lacuna vs Prompt Maschine
Lacuna
lacuna.fm
Prompt Maschine
promptmaschine.comSide by side
| Figure | Lacuna | Prompt Maschine |
|---|---|---|
| Price from | $9.50/mo | $5/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | — |
| macOS | Yes | Yes |
| iOS | Yes | Yes |
| Android | — | Yes |
| API | Yes | — |
| Plans published | 10 | 3 |
| Spec score · AI lyric generators | 9.3 (#1) | 8.8 (#3) |
| Integrations | The developer API can be called through REST, a typed TypeScript client, a command-line toolkit or MCP. | The maker lists Suno, Udio, Kaiber, Riffusion and Stable Audio as supported music tools. |
| Rating on Apple App Store | No rating overview because the app has not received enough ratings or reviews | 4.9 out of 5 from 21 ratings |
| Support | Support is offered through email and a Discord creator community. | The support page offers troubleshooting and contact by email at [email protected]. |
| System requirements | The iOS app requires iOS 17 or later; its Mac compatibility requires macOS 14 or later with an Apple M1 chip or newer. | The app requires iOS 17 or later, and Mac support requires macOS 14 or later on Apple Silicon. |
| What it does | Lacuna is a browser-based AI music workspace that turns prompts or user lyrics into vocal or instrumental songs and supports later editing, enhancement and sharing. | Prompt Maschine creates editable lyrics, structured music prompts and style guidance for use in external AI music services. |
Plans
Lacuna
- Basic$9.50 a month
- Pro$24.50 a month
- Ultra$49.50 a month
- FreeFree
- Credit Pack S$50, paid once
- Credit Pack M$100, paid once
- Basic$114 a year
- Pro$294 a year
- Credit Pack L$500, paid once
- Ultra$594 a year
In their own words
Lacuna
Lacuna turns a short idea into song lyrics and can send them to its music generator to create a track with AI vocals. The editor supports line-by-line rewrites, syllable counts, automatic rhyme highlighting, and rhyme suggestions ranked by meaning. It supports nine languages, with phonetic rhyme support for English, Spanish, Chinese, Japanese, and Korean. Automatic snapshots let users restore an earlier take after AI edits. Lacuna describes the workspace for songwriters, rappers, topliners, producers, and first-time writers, and says generated or edited lyrics may be recorded, released, and used commercially. The free plan provides 120 credits per month without requiring a credit card; each lyrics AI use costs five credits, and unused credits do not roll over. Pricing lists paid service from $9.50/mo (annual), while Basic is $19 a month. Audio downloads require a subscription, and credit packs alone do not include them. The developer API requires Pro or Ultra and uses credit-based billing. Lacuna lists web, iOS, extension, and API platforms.
Prompt Maschine
Prompt Maschine turns song ideas into editable lyric drafts and music-style prompts for Suno, Udio, and other AI music tools. Its lyric generator supports 15 section types and returns two variants based on a selected structure. The Style Trainer builds a reusable profile from 4–8 lines of reference lyrics, extracting traits such as tone, themes, rhyme style, vocabulary, and cadence. Prompt controls include 12 moods, five vocal options, and seven languages. Users can analyze YouTube links, including Shorts, for song details and a ready-to-paste Suno style prompt, or upload audio such as a demo, beat, or voice memo for analysis. The Rhyme Engine offers 10 rhyme systems, three complexity levels, and five rap flows. Quick Song produces text, not finished audio; audio generation takes place in the selected music service under that service’s account, limits, and costs. The free plan allows three generation operations per day. PRO costs $9.99 a month or $59.99 a year. It runs on iPhone and iPad with iOS 17 or later, Apple Silicon Macs, and Android.