# PureMIDI vs Runway

> PureMIDI: Convert audio and sheet music to editable MIDI, then refine it in your browser
> Runway: AI video, image and audio creation suite with Gen-4.5, agents and an API

- PureMIDI profile: https://finderatlas.com/tools/puremidi
- Runway profile: https://finderatlas.com/tools/runway
- Comparison page: https://finderatlas.com/compare/puremidi-vs-runway
- Last reviewed: October 2026

## Verdict

PureMIDI is listed under Audio & Speech AI and Runway under Image & Visual AI. Runway scores higher in FinderAtlas's editorial review (8.4 vs 7.3 out of 10). Both have a free plan or trial. Only Runway is available on iOS and Android and offers an API.

### Choose PureMIDI if

- You want a tool built for turning a hummed or played melody, a recorded riff or a PDF score into editable MIDI for a DAW or notation program.
- Pay-per-use credit packs with no subscription, starting at $4.99 for 30 credits.
- Failed conversions are not charged.

### Choose Runway if

- You want a tool built for Text-to-video and image-to-video generation.
- Combines video, image and audio generation and editing in one workspace.
- Offers Runway's own Gen-4.5 plus third-party models such as Seedance 2.0.

## Pricing

| | PureMIDI | Runway |
| --- | --- | --- |
| Pricing model | Freemium | Freemium |
| Free plan or trial | Yes | Yes |
| Starting price | $0 | $0 |

## Features

| Feature | PureMIDI | Runway |
| --- | --- | --- |
| Audio to MIDI | Yes | Not listed |
| Free preview | Yes | Not listed |
| Sheet music to MIDI (Beta) | Yes | Not listed |
| Browser MIDI editor | Yes | Not listed |
| Video and YouTube workflows | Yes | Not listed |
| Format-specific tools | Yes | Not listed |
| DAW and notation compatibility | Yes | Not listed |
| Pay-per-success credits | Yes | Not listed |
| Gen-4.5 video model | Not listed | Yes |
| Creative Agent | Not listed | Yes |
| Multiple models | Not listed | Yes |
| Characters | Not listed | Yes |
| Aleph and Act-Two | Not listed | Yes |
| Audio tools | Not listed | Yes |
| Workflows and Recipes | Not listed | Yes |
| Runway Dev API | Not listed | Yes |
| Runway MCP | Not listed | Yes |

## Platforms

| Platform | PureMIDI | Runway |
| --- | --- | --- |
| Web | Yes | Yes |
| Windows | No | No |
| macOS | No | No |
| iOS | No | Yes |
| Android | No | Yes |
| API | No | Yes |
| Browser Extension | No | No |

## PureMIDI strengths

- Pay-per-use credit packs with no subscription, starting at $4.99 for 30 credits
- Failed conversions are not charged
- Free previews let users check quality before spending credits
- Covers audio, video, sheet music and existing MIDI in one workspace, with MusicXML export
- In-browser multi-track editor with piano-roll, notation and guitar TAB views
- States a clear retention policy (successful uploads deleted within 3 days)

## PureMIDI limitations

- No named legal entity, address or founding date on the site
- No public API and no native app
- Paid charges are non-refundable except where required by law
- Sheet-music, PDF and drum conversion are labeled Beta, and AI Music generation and Text to MIDI are only waitlisted
- 25 MB upload limit and full-song conversions cost 6 to 15 credits each

## Runway strengths

- Combines video, image and audio generation and editing in one workspace
- Offers Runway's own Gen-4.5 plus third-party models such as Seedance 2.0
- Creative Agent builds videos from a conversation
- Runway Dev API with Node and Python SDKs
- Free plan with 125 credits that do not expire
- Native iOS and Android apps

## Runway limitations

- Credit-based pricing: a 5-second Gen-4.5 clip costs 60 credits, so the 625 credits on Standard cover about 10 such clips
- Standard and Pro credits do not roll over at the end of the month
- Some App Store reviewers complain about the cost of failed or unusable generations
- 4K upscaling is unlimited only on Pro and Max

## FAQ

**Is PureMIDI better than Runway?**

It depends on your workflow. PureMIDI is built for turning a hummed or played melody, a recorded riff or a PDF score into editable MIDI for a DAW or notation program. Runway is built for Text-to-video and image-to-video generation.

**What are the key feature differences between PureMIDI and Runway?**

PureMIDI: Convert audio and sheet music to editable MIDI, then refine it in your browser. Runway: AI video, image and audio creation suite with Gen-4.5, agents and an API.

**Does PureMIDI or Runway have a free plan?**

Yes, both do. PureMIDI is freemium and Runway is freemium, and each has a free plan or trial.

**Which is cheaper, PureMIDI or Runway?**

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.