ChordCraft vs OtoTheory

ChordCraft is a free web-based chord progression generator for producers and musicians. Users choose a genre and mood, then generate progressions with humanized playback and real instruments. The generator lists 10 genres, including Pop, Lo-fi, Jazz, EDM, Rock, R&B, Ambient, Cinematic, Bossa Nova and Hip-Hop, plus eight moods from Happy and Sad to Epic and Mysterious. Voice leading is available, and chords can be edited or locked. Advanced controls cover key selection, chord length and voicing modes. Multiple sections can be combined into a full arrangement. Saved progressions can be exported or imported. Export formats are WAV, stems and MIDI. The Free plan costs nothing and includes those export formats, while listing free generations remaining today. ChordCraft also provides chord audio playback.

OtoTheory is a chord progression builder and music theory companion for guitar, bass, and keyboard players, songwriters, and DAW users. Its iOS app can identify chords, key, and song sections from imported audio or an on-device guitar or piano recording. Users can paste progressions from ChatGPT, Claude, or Gemini for Roman numeral analysis and playback with grooves. The app lists 19 groove patterns and more than 50 progression presets; OtoTheory AI suggests chords using musical feel, theory, and emotion. Pro exports MIDI in Groove, Groove + Theory, or Chords Only modes, including BPM, section markers, and chord names. The maker says those exports can be used with Logic Pro, Cubase, Ableton, and other DAWs. OtoTheory is available on iOS and the web, but the web version has fewer features and Pro is iOS-only. The free iOS plan allows three local sketch saves and excludes MIDI and audio export. Pro is listed from $5.99/mo; its annual plan is $49.99/year, and Lifetime costs $99.99 once.