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Head-to-head · Chord Finder Software

ChordProgressions.org vs OtoTheory

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score ChordProgressions.org #1 in Chord Finder Software 9.4/10 Free plan Free plan✓ 5 of 5 features Open Chord Finder
OtoTheory #2 in Chord Finder Software 9.2/10 Free plan · 7-day trial Free planFree trial✓ 5 of 5 features Visit OtoTheory

ChordProgressions.org leads on 0 checks, OtoTheory on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreChordProgressions.org · 9.4/10
  • Free planboth
  • Free trialonly OtoTheory

ChordProgressions.org scores higher on our rubric for chord finder software: 9.4 against 9.2 out of 10; our editors rank them #1 and #2.

ChordProgressions.org is the better fit for free all-around chord analysis and creation. OtoTheory is the better fit for songwriters wanting AI-assisted chord workflows.

  • ChordProgressions.org fits best

    Free all-around chord analysis and creation

  • OtoTheory fits best

    Songwriters wanting AI-assisted chord workflows

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature ChordProgressions.org 9.4/10 Visit ↗ OtoTheory 9.2/10 Visit ↗
At a glance
Editor score 9.4 9.2
Ranking #1 in Chord Finder Software #2 in Chord Finder Software
Best for Free all-around chord analysis and creation Songwriters wanting AI-assisted chord workflows
Pricing model Free Free plan + paid
Starting price Free plan $49.99/yr
Free plan ✓ ✓
Free trial — 7 days
Deployment Cloud Cloud, Mobile
Platforms Web Web, iOS
Built for Solo, Small business Solo, Small business
Features ChordProgressions.org 5/5 · OtoTheory 5/5
Reverse chord lookup ✓ ✓
Progression generator ✓ ✓
Voicing explorer ✓ ✓
Chord chart export ✓ ✓
Chord audio playback ✓ ✓
Specs
Supported instruments guitar, piano guitar, bass, keyboard
Mobile apps Not checked yet Ios
Our review
Pros
  • Free progression generation with key, mode, genre, mood, length, and complexity controls
  • Reverse chord identification from notes, MIDI, audio, typed, clicked, or fretted input
  • Guitar and piano voicing tools with fingering and voice-leading optimization
  • AI suggestions, progression import, and editable chord building
  • On-device audio chord detection with key, scale, and section analysis
  • MIDI, audio, PDF, and text export plus four DAW integrations
Cons
  • Available through the web platform only
  • Focused on guitar and piano rather than a broader instrument range
  • No AI features for users seeking AI-assisted chord workflows
  • Chord detection is available only on iOS
  • Unlimited saves and full export require a Pro plan
  • The workflow focuses on chords rather than broader music production
Our verdict

ChordProgressions.org is a browser-based chord analysis and creation toolset for guitarists, pianists, songwriters, and learners. It combines progression generation, chord building, reverse identification, analysis, transposition, voicing…

Read the review →

OtoTheory is a web and iOS chord progression builder for guitarists, bassists, keyboard players, songwriters, and DAW users. It supports diatonic chord finding by key and scale, editable progression building, groove playback, chord and…

Read the review →
  1. ChordProgressions.orgChord Finder Software 9.4Free plan
  2. OtoTheoryChord Finder Software 9.2Free plan · 7-day trial

Strengths and trade-offs

  • ChordProgressions.org — where it wins

    • Free progression generation with key, mode, genre, mood, length, and complexity controls
    • Reverse chord identification from notes, MIDI, audio, typed, clicked, or fretted input
    • Guitar and piano voicing tools with fingering and voice-leading optimization

    Where it doesn't

    • Available through the web platform only
    • Focused on guitar and piano rather than a broader instrument range
    • No AI features for users seeking AI-assisted chord workflows

  • OtoTheory — where it wins

    • AI suggestions, progression import, and editable chord building
    • On-device audio chord detection with key, scale, and section analysis
    • MIDI, audio, PDF, and text export plus four DAW integrations

    Where it doesn't

    • Chord detection is available only on iOS
    • Unlimited saves and full export require a Pro plan
    • The workflow focuses on chords rather than broader music production
  • ChordProgressions.org9.4/10 · Free plan

    A free, broad chord workspace for generating, identifying, analyzing, and exporting progressions.

    Open Chord FinderFull verdict →
  • OtoTheory9.2/10 · Free plan · 7-day trial

    A focused chord workspace that combines analysis, suggestions, visualization, exports, and DAW integrations.

    Visit OtoTheoryFull verdict →

More comparisons

All chord finder software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update