7 Best AI B-Roll Generators in 2026 (Stock & Generative)
An AI B-roll generator adds supporting footage over a talking-head video for you. Most read the transcript, pick stock clips or generate new images and video that match the words, and place them on the timeline. The best documented in 2026 are OpusClip, Kapwing, Descript, Submagic, Captions, VEED and Adobe Firefly; they differ in footage source, placement, clip limits and commercial-use terms.
This list is for people who already have a talking-head recording and want cutaways without filming or searching a stock site. It compares what vendors document, not picture quality. No footage at all? Start with our script-to-video and text-to-video comparison.
Facts checked November 13, 2026 against each vendor's feature, help, pricing and terms pages. Plans, credits and models change often, and some vendors price in local currency, so confirm before you pay. Full disclosure: Loopdesk is our product; it appears in the comparison table and its own section, unranked.
What is an AI B-roll generator?
An AI B-roll generator is software that supplies B-roll, the supporting footage cut over your main A-roll. Most tools read the transcript, choose or create a visual for the lines worth covering, and put it on the timeline. Others only generate a clip and leave placement to you.
The footage comes from a stock library the tool searches, or from a generative AI video or image model.
| Stock-matching B-roll | Generative B-roll | |
|---|---|---|
| Source | A stock library: Pexels (OpusClip), iStock, Pexels and Pixabay (Kapwing), Storyblocks (Descript, Submagic Pro) | A model that makes a new image or clip from your transcript or prompt |
| Licensing | The library's license. OpusClip says stock must "follow the underlying providers guidelines" | The tool's terms and the model. Adobe says partner models "may have different usage terms" |
| Look | Pre-recorded footage, limited to what the library holds | Made for your line. OpusClip's AI Style matches "the color, lighting, and camera feel of your footage" |
| Cost | Often included: on OpusClip plans that have B-roll, "Stock video B-roll is free" | Usually metered in credits |
What is the best AI B-roll generator?
For adding B-roll to an existing talking-head video, OpusClip is the most fully documented choice: it reads the transcript, suggests spots you approve, and fills them with stock footage, AI images or AI video. Kapwing and Descript also mix stock with generated media; Adobe Firefly has the clearest commercial-use statement.
The ranking is an editorial judgment from vendor documentation, not a lab test: tools that place B-roll for you rank above pure generators.
1. OpusClip: best for automatic B-roll you approve first
Click Find spots and OpusClip "reads your transcript and suggests where B-roll fits". You approve the spots, then fill them with stock video (from Pexels), AI images or AI video. A one-click mode handles videos up to 120 minutes. The free plan has no B-roll; Starter ($15 a month, monthly only) lists AI image and stock B-roll at 3 clips a month each, and Pro ($29, or $14.50 a month billed annually) adds AI video. See our OpusClip alternatives.
2. Kapwing: best for stock matching with a free plan
Smart B-roll "analyzes your video transcript" and places matching clips on the timeline; it needs speech. Footage comes from "a vast library of stock footage powered by iStock, Pexels, and Pixabay", and you can generate custom clips from a prompt. The free plan has 10 credits and watermarked 720p exports. Pro shows $16 a month on annual billing, with 1,000 credits.
3. Descript: best for B-roll inside a text-based edit
Best on single-speaker recordings, Quick Design builds scenes and can add B-roll drawn "from stock and AI-generated media". Descript calls the result a rough cut. You can also generate a clip from a prompt or search the stock library, which includes Storyblocks. The free plan has 100 one-time AI credits and the first five stock results per search. Hobbyist is $24 a month ($16 on annual billing); Creator, at $35 ($24), has unlimited stock.
4. Submagic: best for one-click stock B-roll on short clips
Submagic "understands your transcript and contextually adds relevant b-roll footage": the Magic B-rolls button places clips in one click, and you set how long each stays on screen. The footage it describes is "royalty free or premium" stock; Pro lists Storyblocks B-roll. Plans cap video length at 2 minutes (Starter), 5 (Pro) or 30 (Business). The pricing page showed rupees to our checker; its structured data lists Starter at US$19 a month ($144 a year) and Pro at $39 ($276).
5. Captions: best for one-tap styled edits with generated B-roll
Captions (by Mirage) builds B-roll into AI Edit: pick a style and get "auto captions, transitions, B-roll, music, and motion graphics on iOS and web". On the web, Generate media lets Captions "generate B-roll and images for the edit" and "uses more credits". The help page advises one speaker, unedited footage and three minutes or less. The free version has no AI usage credits; Max is listed at $24.99 a month with 500 credits (iOS plan prices).
6. VEED: best for generated image cutaways
Magic B-Roll transcribes your video and adds a B-roll track "synced to key points in your narration". VEED's own pages differ on what it adds: the tool page's FAQ says "Currently, our AI B-Roll feature only generates custom images," while its help article says the feature "automatically adds relevant images and video clips to your project." Free and Lite users get one try; Pro is unlimited. The pricing page lists prices "in your local currency if available", so we could not confirm US prices.
7. Adobe Firefly: best for commercially safe generated clips
Firefly is a generator, not an auto-placer: you prompt a clip (Adobe lists "B-roll and stock-style footage" among its uses) and cut it in yourself. Adobe says "Videos generated with the Adobe Firefly model are safe for commercial use", while partner models "may have different usage terms". Most models make clips of up to 8 seconds, some 15, at up to 4K. A daily allotment of generations is free; the plans page showed no prices to our checker. To join short clips, see how to stitch AI-generated clips.
AI B-roll video generators compared (November 2026)
"Not stated" means the vendor pages we read are silent.
| Tool | Footage source | Auto B-roll placement | Clip length and resolution | Commercial-use terms | Free plan | Lowest paid price (US) |
|---|---|---|---|---|---|---|
| OpusClip | Stock (Pexels), AI images, AI video | Yes; you approve spots | Not stated | Paid plans only | No B-roll; 7-day Pro trial | Starter $15/mo; Pro $29/mo ($14.50/mo billed annually) |
| Kapwing | Stock (iStock, Pexels, Pixabay); generated on request | Yes | Not stated; exports 720p free, 4K on Pro | "Full commercial rights on all exports" | 10 credits; watermark, 720p | Pro $16/mo (annual billing) |
| Descript | Stock (Storyblocks, GIPHY) and AI-generated | Optional, in Quick Design | Set per model; exports 720p free, 4K on Creator | You own outputs; GIPHY excluded | 100 one-time AI credits; 720p | Hobbyist $24/mo ($16 annual) |
| Submagic | Stock; Storyblocks on Pro | Yes | You set on-screen time; exports 1080p to 4K by plan | Not stated for stock | None on the pricing page | Starter $19/mo ($144/yr) |
| Captions | Generated, or your own media | Yes, in AI Edit | Not stated | You own your output | No AI credits | Max $24.99/mo (iOS pricing) |
| VEED | Generated images (its help article also lists video clips); stock by replacement | Yes | Not stated | You own what you generate | One try | Not confirmed (local currency) |
| Adobe Firefly | Generated video | Not described; you place it | Up to 8 s, some models 15 s; up to 4K | Firefly model "safe for commercial use"; partner models vary | Daily free generations | Not shown to our checker |
| Loopdesk (our product) | Generated video and images | By hand, or by prompt to Aura | Set per clip (panel example: 8 s, 720p) | Full commercial-use rights on every plan | No free plan or trial | Creator Lite $19/mo ($15/mo billed annually) |
Is there a free AI B-roll generator?
Yes, with limits. Kapwing's free plan includes 10 credits and exports at 720p with a watermark, Descript's includes 100 one-time AI credits, Adobe Firefly gives a daily allotment of free generations, and VEED lets Free and Lite users try AI B-roll once. OpusClip's free plan excludes B-roll.
OpusClip gives new users a 7-day Pro trial that includes B-roll, with watermarked exports. Captions' free version has no AI usage credits, Submagic's pricing page lists only paid plans, and Loopdesk has no free plan and no free trial. For free B-roll footage, Kapwing's free plan includes a starter set of stock assets. See also free AI video editors with no watermark.
How much B-roll should a talking-head video have?
There is no authoritative ratio. None of the vendor pages we read publishes a recommended percentage, and the right amount depends on what the video has to show. A workable rule: cover the lines that can be pictured, and keep the speaker on screen when the person is the point.
Two rules of thumb: our A-roll and B-roll guide sketches 65% A-roll, 30% B-roll and 5% texture as a planning example, not a benchmark, and Submagic's B-roll page suggests changing the picture every 3 to 5 seconds on TikTok, one vendor's advice.
Is AI-generated B-roll safe to use commercially?
It depends on the tool, your plan and the model that made the clip. Adobe says video from its own Firefly model is "safe for commercial use", while partner models "may have different usage terms". OpusClip licenses commercial use only to paid users. Read the terms for your plan before you publish. This is not legal advice.
Each vendor's own words, read November 13, 2026:
- Adobe Firefly: "Commercial usage eligibility depends on the model used."
- OpusClip: free use is "personal, non-commercial use"; paid users are "licensed to use the Services for commercial uses". Stock must "follow the underlying providers guidelines".
- Kapwing: "All AI-generated content created on Kapwing comes with full commercial rights."
- Descript: you own Input and Output "to the extent protectable under applicable law". Stock "may be used in most commercial, personal, and editorial projects", except GIPHY.
- Captions: "you own all rights in and to your Input and Output", subject to Mirage's rights in its own content.
- VEED: you keep ownership of "any content that you generate as a result of using our tools".
- Submagic: "The Customer assumes full responsibility for the use of AI-generated results." Its terms don't mention stock footage.
Ownership is not clearance: Descript warns that stock can depict "trademarks, logos, or other copyrighted content". Label generated footage where your platform or audience expects it; our C2PA content credentials guide covers provenance.
How do you add B-roll that helps instead of distracting?
Start from the words, not the clips. Cover a line only when the picture shows what is being said, review what the tool picked, and never use stock or generated footage as proof that something happened. Our A-roll vs B-roll vs C-roll guide covers the craft in depth.
- Cover what can be shown. A line about a feature needs the feature on screen, and a cutaway over a jump cut hides the edit.
- Review automatic picks. OpusClip lets you deselect spots; Kapwing, VEED and Captions let you swap or delete what was placed.
Where does Loopdesk fit?
Loopdesk (full disclosure: Loopdesk is our product) generates B-roll video and images in the Create panel of an agentic AI video editor, on metered AI credits. It is paid only and browser only. If you want stock footage matched to your transcript in one click, or a free plan, OpusClip or Kapwing is the better choice.
In the Create panel you write a prompt, set aspect ratio, duration and resolution, and see a credit estimate before you generate. The clip lands in your library, next to the timeline where Aura, Loopdesk's AI agent, cuts and captions. Drag it over the line, or ask Aura in plain English. The Create panel walkthrough has the details.
There is no free plan and no free trial; Creator Lite is $19 a month, or $15 a month billed annually (pricing), with full commercial-use rights on every plan. For editors beyond B-roll, see our best AI video editing tools.
Frequently Asked Questions
What is an AI B-roll generator?
An AI B-roll generator adds supporting footage over a talking-head video for you. Most read the transcript, pick stock clips or generate new images and video to match, and place them on the timeline. Some only generate a clip and leave placement to you.
What is the best AI B-roll generator?
For an existing talking-head video, OpusClip is the most fully documented: it reads the transcript, suggests spots you approve, and fills them with stock footage, AI images or AI video. The ranking is editorial, from vendor documentation.
Is there a free AI B-roll generator?
Yes, with limits. Kapwing's free plan has 10 credits, Descript's has 100 one-time AI credits, Adobe Firefly gives a daily allotment of generations, and VEED allows one try. OpusClip's free plan excludes B-roll. Loopdesk has no free plan or trial.
How much B-roll should a talking-head video have?
There is no authoritative ratio. None of the vendor pages we read publishes one, and the right amount depends on the video. As a planning example only, a talking-head video might be about 65% A-roll, 30% B-roll and 5% texture.
Is AI-generated B-roll safe to use commercially?
It depends on the tool, plan and model. Adobe says video from its own Firefly model is safe for commercial use, while partner models may have different usage terms. OpusClip licenses commercial use to paid users only. Read the terms for your plan. This is not legal advice.
Have a talking-head cut that needs cover? Open Loopdesk and generate the missing shot next to your timeline.