Instead of music21
music21 alternatives
music21 gives Python users a free toolkit for computer-aided musicology. It supports dataset study, musical analysis, teaching, composition, notation editing, and example generation. Its corpus contains thousands of encoded works, while corpus search, pitch plotting, and nPVI support analytical work. MIDI, MusicXML, parts extraction, tablature, Jupyter use, and optional connections for rendering, plotting, recording, audio searching, and realtime MIDI broaden its workflows. It runs on Linux, macOS, Windows, and the web, and its BSD license permits use without required Internet access.
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Fender Notion
by Fender NotionFree plan AndroidiPhoneLinux+3Collaborative notation across desktop, web, and mobile — Fender Notion adds collaboration and native iOS and Android apps to music21’s analysis-focused toolkit.
Free plan Visit site - 2
Flat
by FlatFree plan AndroidiPhoneMac+2Browser-based collaborative scoring with optional paid tier — Flat combines collaborative notation with Android and iOS apps, unlike music21’s Python-centered workflow.
Free plan · paid from $9.99/mo Visit site - 3
Dorico
by DoricoFree plan iPhoneiOS notation with a paid desktop-oriented product line — Dorico offers notation on iOS with a 60-day trial, while music21 centers on Python analysis across more platforms.
Free plan · 60-day trial Visit site - 4
MuseScore Studio
Free plan LinuxMacWindowsFree open-source desktop composition and notation — MuseScore Studio is a free open-source score editor with playback, printing, and unlimited score length.
Free plan Visit site - 5
Noteflight
by NoteflightFree trial WebWeb-based notation with collaboration and a free trial — Noteflight provides web-only collaborative notation but no free plan, unlike music21’s free toolkit.
Free plan · paid from $49/yr Visit site - 6
LilyPond
Free plan LinuxMacWindowsText-based engraving across classical and modern projects — LilyPond turns human-readable text into automatically laid-out engraved scores, unlike music21’s analysis-centered approach.
Free plan Visit site - 7
Denemo
Free plan LinuxMacWindowsFree desktop notation with multiple music-entry methods — Denemo offers keyboard, MIDI controller, mouse, or microphone entry and uses LilyPond for typesetting.
Free plan Visit site - 8
ChordIQ
Free plan AndroidiPhoneMac+1 - 9
Complete Rhythm Trainer
Free plan AndroidiPhoneMac+2 - 10
Harmonia
Free plan AndroidiPhoneMac+2 - 11
Musicca
Free plan AndroidiPhoneWeb - 12
Music Master
Free plan AndroidiPhoneWeb - 13
muted.io
Free plan LinuxMacWeb+1 - 14
Contrapunctus
Free plan Web7.1 Visit site - 15
MyMusicTheory
Free plan AndroidiPhoneMac - 16
note-noodle
Free plan AndroidLinuxMac+2 - 17
Interactive Music Theory Lab
Free plan Web - 18
MusicTheory.net
Free plan iPhoneWeb - 19
Study Music Theory
Free plan AndroidiPhoneWeb - 20
Teoria
Free plan AndroidiPhoneWeb - 21
Integrated Musicianship: Theory
Free plan Web - 22
neirocca
Free plan Web - 23
Open Music Theory
Free plan Web - 24
The Rhythm Trainer
Free plan Web - 25
ToneSavvy
Free plan Web - 26
uTheory
Free plan Web - 27
Complete Music Trainer
Free trial MacWebWindows - 28
Musition
Free trial AndroidiPhoneMac+2 - 29
Clements Theory
Free trial Web - 30
MidiStickers
Free trial MacWindows - 31
ABRSM Music Theory Trainer
Paid AndroidiPhone5.8 Visit site
Readers may prefer another application when they need a score editor rather than a Python toolkit. music21 mainly manipulates symbolic data, cannot read notation from images or PDFs, and recommends other programs for viewing and editing scores. Python familiarity is also expected, and individual corpus works may have separate restrictions. Compare whether your priority is collaborative notation, mobile access, dedicated engraving, direct score entry, browser work, or keeping a free desktop workflow before switching.