# Riff vs Runway

> Riff: Draft fresh replies, DMs and posts for X, LinkedIn, Facebook and Instagram on-device
> Runway: AI video, image and audio creation suite with Gen-4.5, agents and an API

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

## Verdict

Riff is listed under Productivity and Runway under Image & Visual AI. Runway scores higher in FinderAtlas's editorial review (8.4 vs 7.8 out of 10). Both have a free plan or trial. Only Riff is available on Chrome Extension. Only Runway is available on Web, iOS and Android and offers an API.

### Choose Riff if

- You want a tool built for writing quick replies and comments on social posts.
- Free, with no account, subscription or API key.
- Generation runs on-device with Gemini Nano, so text is not sent to a server.

### 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

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

## Features

| Feature | Riff | Runway |
| --- | --- | --- |
| On-device AI | Yes | Not listed |
| Replies and comments | Yes | Not listed |
| DM replies and first messages | Yes | Not listed |
| Riff a post | Yes | Not listed |
| Dials | Yes | Not listed |
| Repurposing | Yes | Not listed |
| Voices and presets | Yes | Not listed |
| Never sends for you | 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 | Riff | Runway |
| --- | --- | --- |
| Web | No | Yes |
| Windows | No | No |
| macOS | No | No |
| iOS | No | Yes |
| Android | No | Yes |
| API | No | Yes |
| Browser Extension | No | No |
| Chrome Extension | Yes | No |

## Riff strengths

- Free, with no account, subscription or API key
- Generation runs on-device with Gemini Nano, so text is not sent to a server
- Covers replies, DMs, posts and X threads in one side panel
- Never presses send, which keeps the user in control
- Dials for tone, pitch and length, plus a Fresh score to avoid repetitive openings

## Riff limitations

- Requires desktop Chrome 138 or newer and a one-time Gemini Nano download
- Output quality is limited by the small on-device model
- Chrome only; no Firefox, Safari or mobile support
- Very new, with few reviews on the Chrome Web Store

## 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 Riff better than Runway?**

It depends on your workflow. Riff is built for writing quick replies and comments on social posts. Runway is built for Text-to-video and image-to-video generation.

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

Riff: Draft fresh replies, DMs and posts for X, LinkedIn, Facebook and Instagram on-device. Runway: AI video, image and audio creation suite with Gen-4.5, agents and an API.

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

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

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

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