# The best AI B-roll generators

> The best AI B-roll generators in 2026: Runway, invideo, OpusClip, Submagic, Riverside and more. See how each makes B-roll, plan limits and prices.
- **Author**: Marxx
- **Published**: 2026-11-06
- **Category**: Video editing
- **URL**: https://marxx.ai/library-best/best-ai-b-roll-generators

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Runway and invideo generate new B-roll shots from prompts. OpusClip, Submagic, Riverside and ZapCap add stock or AI B-roll inside a captioning or clipping tool.

## Quick comparison

| Tool | How it makes B-roll | Price (checked 3 Nov 2026) |
|---|---|---|
| Runway | Generates video from prompts | Free, 125 one-time credits. Standard $12 a month billed yearly |
| invideo | Text to video with Veo 3.1, Sora 2 and Kling | Basic $9 a seat per month |
| OpusClip | Stock and AI image B-roll, then AI video B-roll | Starter $15 a month, Pro $29 a month |
| Submagic | Inserts B-roll automatically | Starter $19 a month ($12 billed yearly) |
| Riverside | AI B-roll generation | See Riverside's pricing page |
| ZapCap | Magic B-Rolls and an Auto B-Roll feature | Free, 3 videos a month. Starter $8 a month shown |
| Captions | Automatic scene cuts and B-roll overlays (by Mirage) | Free credits. Max US$24.99 a month on its site |
| Pictory | Storyblocks and Getty stock, script to video | Starter $25 a month billed yearly ($29 monthly) |
| Marxx | An assistant that adds B-roll, plus generated video | Cut $9, Match $29, Master $69 a month, launch prices |

## Generate new shots

Runway lists Gen-4.5, Seedance 2.0 and Kling 3.0 on its own pages. Its Standard plan includes all video and image models with no watermark. Free exports carry a watermark. invideo lists Veo 3.1, Sora 2, Kling, Wan, Pixverse and Hailuo. It turns a script into a shot-by-shot plan. Its pricing page lists no free plan.

## B-roll inside a clip tool

OpusClip's Starter plan lists 3 AI image and 3 stock B-roll a month. Pro adds AI video B-roll and unlimited stock. Submagic lists free B-roll on Starter and Storyblocks B-roll on Pro. Riverside lists AI B-roll on Pro and up, though its pricing pages disagree. Pictory's paid plans list Storyblocks and Getty media.

## Extend what you shot

Premiere Pro (now called Adobe Premiere) lists Generative Extend, which extends clips and adds frames. Adobe's single-app plan lists 25 generative credits a month. Stock B-roll is real footage. AI B-roll is made up, so check hands, text and logos in every shot.

## A worked example

Say you want one B-roll shot in each of 12 ads a month. OpusClip Starter lists 3 AI image and 3 stock B-roll a month, which is 6 shots. That leaves 6 ads short. Pro lists unlimited stock and AI video B-roll, so 12 shots fit. Count your shots before you pick a plan.

## How to choose

1. Decide if you need real stock or AI-made shots.
2. Check the plan's cap, such as shots a month.
3. Check the licence of stock clips before you run them as ads.
4. Test one prompt on the free plan.

We make Marxx. Its [AI video editor](/features/ai-video-editor) has a Generate tab for video and images, and its assistant can add B-roll on the timeline. Generation uses credits. It runs in the browser.

For the video models behind these tools, see the [best AI video models for ads](/best/best-ai-video-models-for-ads). To compare the wider tools, see the [best AI video editing apps](/best/best-ai-video-editing-apps).

## FAQ

### What is B-roll?

B-roll is the extra footage you cut to over the main shot, such as product close-ups or a street scene.

### Can AI B-roll run in ads?

Check the tool's terms and your ad platform's rules. Look closely at faces, hands and on-screen text.

### Is there a free AI B-roll generator?

Runway's Free plan gives 125 one-time credits, with a watermark. OpusClip and ZapCap have free plans with limits.

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