AIストックビデオジェネレーターのトップ5

AI stock video generators are transforming the way businesses, marketers, and creators produce engaging video content at scale. By leveraging advanced AI, these platforms convert text prompts, images, or scripts into polished stock videos—drastically reducing production time and costs while unlocking new creative possibilities. As the market matures, the top solutions are differentiating themselves through speed, customization, workflow integration, creative controls, and compliance features. Below, we compare the leading AI stock video generators, highlighting their features, pricing, strengths, and unique advantages to help you select the best fit for your organization.

Akool: Best for Rapid, On-Brand Stock Video Creation

Akool is designed for brands and creators who need to generate high-quality, branded stock videos in minutes. Its intuitive interface and robust AI models make it accessible for both beginners and professionals, standing out for its deep brand customization, lightning-fast rendering, and seamless integration with marketing workflows. For brands seeking to create high-impact professional content without the cost, our guide to the best 5 AI video generators to create high-impact professional content without the cost offers practical insights. Unlike many competitors that focus solely on creative effects or automation, Akool prioritizes brand consistency and speed, making it a go-to for agencies and enterprises with tight deadlines.

Recent product updates in 2025 include advanced brand kit integration, an expanded template library, and improved rendering speeds for enterprise users. These enhancements further streamline the workflow for teams managing multiple brands or campaigns, ensuring every video aligns with specific visual identities.

Key Features:

• Brand Kit Integration: Upload logos, color palettes, and fonts to guarantee every video matches your brand guidelines. This is particularly valuable for businesses managing multiple brands or campaigns, ensuring consistency across all outputs.
• Text-to-Video and Image-to-Video: Generate videos from simple text prompts or animate still images. Akool’s AI interprets creative direction and assembles relevant stock footage, overlays, and transitions, making it easy to scale content production.
• Template Marketplace: Access a curated, regularly updated library of templates for social media, ads, and presentations. This feature helps marketers quickly adapt to trending formats and maintain a fresh content pipeline.

Pricing:

• Free plan with watermark and limited exports.
• Pro plan starts at $29/month for 30 HD exports.
• Custom enterprise pricing for higher volumes and advanced features.

Pros:

• Extremely fast video rendering—ideal for agencies and marketers with urgent needs.
• Deep brand customization, including support for multiple brand kits.
• User-friendly interface with guided workflows, making professional video creation accessible to non-editors.

Cons:

• Free plan includes a prominent watermark, limiting its use for public-facing content.
• Advanced features like API access and team collaboration are only available on higher-tier plans.
• Lacks frame-by-frame manual editing, which may restrict creative flexibility for advanced users.

Use Cases:

• Branded Social Media Campaigns: Marketers can rapidly produce and iterate on branded stock videos for ads and organic posts, ensuring every asset is on-brand and ready for deployment within minutes.
• E-commerce Product Showcases: Automate the creation of product videos using templates and AI voiceovers, streamlining catalog updates and promotional content.
• Internal Communications: Quickly generate professional, branded videos for presentations or company updates, maintaining consistency and saving valuable time.

Limitations:

• Does not support granular, frame-by-frame editing, which may be necessary for highly customized or complex animations.
• Currently limited to English-language prompts and voiceovers, though multilingual support is on the roadmap.
• The stock asset library may not cover highly niche or industry-specific visuals, requiring occasional manual uploads.

What Makes Akool Unique:
Akool uniquely combines rapid AI video generation with deep brand customization, making it the top choice for businesses that value both speed and consistent visual identity. While other platforms may excel in creative effects or automation, Akool’s focus on brand alignment and workflow integration sets it apart—especially for enterprise and agency teams.

Runway: Best for Advanced Creative Controls and Cinematic Quality

Runway is a leader in generative AI video, catering to creative professionals who demand flexibility and high-fidelity visuals. Its Gen-4 model delivers cinematic video clips from text or image prompts, with advanced features like camera movement, prompt engineering, and multi-modal editing. For a broader head-to-head comparison of Synthesia AI and competitors, see our dedicated breakdown. Runway’s comprehensive AI-powered editing suite makes it a favorite among filmmakers, content creators, and studios looking for more than just automated stock video.

Product updates in 2025 include the launch of the Gen-4 model, which brings improved realism, longer shot lengths (up to 16 seconds), and enhanced camera controls. The expanded Runway Academy provides robust educational resources, helping users master prompt engineering and creative workflows.

Key Features:

• Text-to-Video and Image-to-Video: Create videos from detailed prompts or animate still images with AI-driven motion and effects. This allows for rapid prototyping and creative experimentation.
• Camera and Motion Controls: Specify camera movements, scene transitions, and visual styles for greater creative direction, enabling more cinematic and dynamic outputs.
• AI Video Editing Suite: Includes tools for background removal, slow motion, subtitle generation, and more—all powered by AI, reducing reliance on multiple platforms.

Pricing:

• Free plan with 125 credits (limited features and watermark).
• Standard plan at $12/month unlocks Gen-4, 625 monthly credits, no watermark, and higher export quality.

Pros:

• High-quality, cinematic video generation with advanced creative controls.
• Robust help content and educational resources via Runway Academy.
• Versatile toolset covers both generative video and traditional editing tasks.

Cons:

• Steep learning curve, especially for users unfamiliar with prompt engineering.
• Credit-based pricing can be confusing and may limit experimentation for heavy users.
• Occasional inconsistencies in AI-generated motion and object permanence.

Use Cases:

• Short Films and Music Videos: Filmmakers can produce visually unique content with advanced effects and camera controls, pushing the boundaries of AI-generated video.
• Rapid Prototyping for Agencies: Agencies can quickly iterate on video concepts, using AI to visualize ideas before full-scale production.
• Automated Editing for Social Platforms: Automate background removal and subtitle generation for YouTube or TikTok, streamlining post-production workflows.

Limitations:

• Not ideal for long-form content due to shot length limits (16 seconds per clip).
• Requires prompt engineering skills to achieve the best results, which may deter beginners.
• No native lip-sync or sound generation for dialogue-heavy videos.

What Makes Runway Unique:
Runway stands out for its combination of advanced creative controls, high-quality generative models, and a comprehensive AI-powered editing suite. It’s the platform of choice for professionals who want to push creative boundaries and need more than just automated stock video.

invideo AI: Best for Prompt-to-Video Social Media and Marketing Content

invideo AI is purpose-built for marketers and content creators who need to turn ideas into ready-to-publish stock videos at scale. Its AI-driven workflow converts text prompts into scripts, selects relevant stock footage, adds voiceovers, and applies transitions with minimal user input. If you’re curious about the complete guide to top free AI video generators in 2025, our analysis covers the latest tools and trends. This makes invideo AI especially effective for high-volume, faceless video production for social media and marketing.

Product updates in 2025 include improved prompt accuracy, an expanded stock media library, and new editing-by-prompt capabilities, further streamlining the content creation process for busy marketing teams.

Key Features:

• AI Script-to-Video: Converts text prompts into full video scripts and assembles matching stock footage, overlays, and music, automating much of the creative process and reducing manual effort.
• Prompt-Based Editing: Make changes to videos by typing commands (e.g., "add subtitles"), enabling fast, intuitive adjustments without navigating complex timelines.
• Stock Media Integration: Access a large, regularly updated library of royalty-free footage, images, and audio, ensuring diverse content options for various campaigns.

Pricing:

• Free plan allows 10 minutes of generated video per week and 4 exports with watermark.
• Plus plan at $35/month includes 50 minutes/month, iStock footage, and unlimited exports.

Pros:

• Extremely efficient workflow for producing high-volume, faceless social videos.
• Accurate prompt-to-video conversion and easy editing via text commands.
• Large, regularly updated stock media library.

Cons:

• Interface can be confusing for first-time users, especially during editing.
• Lower-tier plans restrict access to premium stock assets.
• Watermarks on free exports may limit use for professional publishing.

Use Cases:

• Scaling Social Media Ads: Marketers can quickly produce and iterate on social ads, explainer videos, and YouTube shorts, maximizing reach and engagement across platforms.
• Repurposing Written Content: Turn blog posts or scripts into video content for multiple channels, extending the value of existing assets.
• B-roll and Background Videos: Generate background visuals for presentations and webinars, saving time on manual video sourcing.

Limitations:

• Limited manual editing controls for advanced customization, which may restrict creative flexibility for power users.
• Voiceover quality may vary depending on the selected AI voice, impacting the overall polish of the final video.
• Not suitable for highly cinematic or narrative-driven projects that require detailed creative direction.

What Makes invideo AI Unique:
invideo AI’s prompt-based workflow and deep stock media integration make it the fastest way to turn ideas into publish-ready marketing videos. Its focus on automation and scale is ideal for teams managing high-volume content pipelines.

Sora (OpenAI): Best for Collaborative, Narrative-Driven AI Video Generation

Sora by OpenAI brings state-of-the-art generative AI to video creation, enabling users to generate visually stunning scenes from simple text prompts. Its unique storyboard feature allows for multi-scene sequencing, maintaining visual consistency across cuts—a capability echoed in our roundup of the best 5 AI video generators that bring your ideas to life. Product updates in 2025 include expanded US-only access via ChatGPT Plus, the introduction of storyboard sequencing, and remixing of existing generations. The Pro plan now offers 1080p exports and longer shot lengths, catering to users who need higher-quality outputs.

Key Features:

• Text-to-Video and Storyboard: Generate videos from single prompts or sequence multiple scenes for narrative consistency, making it ideal for storyboarding and creative pitches.
• Remixing and Community Sharing: Edit and build upon other users’ creations, fostering a collaborative environment and rapid iteration.
• High-Quality Output: Exports up to 1080p (Pro), with advanced AI rendering for visually rich scenes.

Pricing:

• Included in ChatGPT Plus at $20/month (50 generations, 720p, 5s each).
• Pro plan at $200/month removes watermark, increases limits to 500 generations, 1080p, and 20s per video.

Pros:

• Unique storyboard feature for multi-scene video generation and visual consistency.
• Easy-to-use interface accessible via ChatGPT, lowering the barrier for new users.
• Remixing capabilities encourage creative collaboration and rapid iteration.

Cons:

• Currently only available in the US and requires a ChatGPT Plus subscription.
• Lowest paid plan includes watermark and short video length (5 seconds).
• Occasional issues with object permanence and dynamic movement, especially for humans/animals.

Use Cases:

• Imaginative Short-Form Videos: Create visually rich, short-form content for social media or creative projects, leveraging the power of AI to bring ideas to life.
• Storyboarding and Visualization: Visualize concepts for pitches or presentations, using the storyboard feature to maintain narrative flow.
• Remixing for Viral Content: Remix trending videos for collaborative campaigns, tapping into community creativity.

Limitations:

• Not suitable for long-form or highly detailed narrative videos due to shot length limits.
• Limited advanced editing controls compared to traditional editors, which may restrict detailed customization.
• Availability restricted to US users and ChatGPT Plus subscribers, limiting its reach for global teams.

What Makes Sora Unique:
Sora’s storyboard sequencing and remixing features set it apart as the most collaborative and narrative-friendly AI video generator, making it ideal for creative teams and agencies focused on storytelling.

Kling AI: Best for Filmmaker-Level Control and Realism

Kling AI is tailored for creators and professionals who want precise control over AI-generated video, offering advanced features like lip-sync, shot extension, and detailed camera controls. It excels at producing realistic, cinematic stock videos and supports both text-to-video and image-to-video workflows, making it a favorite among filmmakers and agencies seeking accuracy and creative flexibility. For a broader view of free solutions, see our ranked list of leading free AI video generator tools.

Product updates in 2025 include the release of Kling 2.0, which brings improved lip-sync, shot extension up to 3 minutes, and new meme-worthy preset effects. Enhanced support for uploading custom objects and assets further expands creative possibilities.

Key Features:

• Lip-Sync and Shot Extension: Generate videos with accurate lip-sync for dialogue and extend shots for up to 3 minutes, making it ideal for explainer or narrative content that requires longer, more dynamic clips.
• Camera and Motion Controls: Fine-tune camera movements, transitions, and scene composition for filmmaker-level direction, providing granular creative control.
• Custom Asset Upload: Incorporate user-supplied images, objects, or clothing into generated videos for greater personalization and brand alignment.

Pricing:

• Free plan (Kling 1.6) with limited features and slow rendering.
• Professional plan at $10/month for 1080p, 10s shots, and advanced controls.

Pros:

• Industry-leading accuracy and realism in AI-generated stock video.
• Filmmaker-friendly features like lip-sync and shot extension for longer, more dynamic clips.
• Ability to upload custom assets for personalized video creation.

Cons:

• Free plan has slow rendering times and fewer features, which may hinder rapid prototyping.
• Interface may be less intuitive for beginners due to the abundance of advanced controls.
• Occasional minor artifacts or inconsistencies in complex scenes.

Use Cases:

• Professional Explainer and Promo Videos: Produce high-quality, narrative-driven videos with precise creative direction, ideal for agencies and filmmakers.
• Longer Stock Video Sequences: Generate extended video sequences for ads or branded content, leveraging shot extension and advanced controls.
• Custom Campaigns: Personalize videos with user-supplied assets for unique campaigns, enhancing brand differentiation.

Limitations:

• Shot length on standard plans is limited to 10 seconds unless extended, which may not suit all project needs.
• Some features, like advanced lip-sync, require a paid subscription, potentially increasing costs for frequent users.
• Not as beginner-friendly as simpler prompt-based tools, which may slow onboarding for new users.

What Makes Kling AI Unique:
Kling AI’s combination of lip-sync, shot extension, and granular camera controls makes it the top choice for filmmakers and professionals seeking detailed creative control and cinematic realism.

Feature Comparison and Market Context

Across the AI stock video generator landscape, platforms are differentiating themselves through a blend of speed, creative control, workflow integration, and compliance. Akool leads in rapid, on-brand video creation, making it ideal for businesses and agencies that prioritize brand consistency and fast turnaround. Runway and Kling AI cater to creative professionals and filmmakers, offering advanced controls and cinematic quality, while invideo AI and Sora focus on automation, prompt-based workflows, and collaborative features for marketers and creative teams.

Competitor analysis from sources like TechRadar, Influencer Marketing Hub, and Zapier Blog highlights the growing importance of workflow automation, integration capabilities, and ease of use. Meanwhile, Shotkit emphasizes creative quality and aesthetics, and AI Tool Report brings attention to compliance, security, and future-proofing—key considerations for enterprise buyers.

Opportunities for differentiation remain in areas such as:

• Deeper workflow automation and integration with productivity tools (as seen in Zapier’s coverage).
• Advanced brand customization and template management (where Akool excels).
• Legal and copyright compliance features for enterprise and regulated industries.
• Enhanced creative controls and cinematic features for filmmakers (Runway, Kling AI).
• Collaborative and community-driven content creation (Sora’s remixing and storyboard features).

As AI video technology continues to evolve, businesses should consider not only the creative and technical capabilities of each platform but also how well they integrate with existing workflows, support compliance needs, and enable scalable, on-brand content production.

Frequently Asked Questions

What is an AI stock video generator?

An AI stock video generator is a tool that uses artificial intelligence to turn text prompts, images, or scripts into ready-to-use stock videos, streamlining the video creation process for businesses and creators.

How do AI video generators handle brand customization?

多くのプラットフォームでは、ロゴ、色、フォントなどのブランドアセットをアップロードできます。これにより、生成されたすべての動画がブランドガイドラインに合致し、キャンペーン全体で視覚的な一貫性が保たれます。

AI で生成されたストックビデオを商業目的で使用できますか？

ほとんどのAIストック動画ジェネレーターは商用利用権を提供していますが、特に公開キャンペーンでストックアセットやAIで生成されたビジュアルを使用する場合は、各プラットフォームのライセンス条件を確認してコンプライアンスを確認することが重要です。

AI ビデオジェネレーターの使用に制限はありますか？

一般的な制限としては、手動編集の制限、ショットの長さの上限、無料プランの透かし、AI で生成されたビジュアルの不一致などがあります。プラットフォームによっては、高度な機能が有料プランに限定される場合もあります。

これらのツールはチームのコラボレーションをサポートしていますか？

多くの AI ビデオジェネレーターは、共有ブランドキット、プロジェクトフォルダー、ワークフロー統合など、チームコラボレーションのための機能を備えています。これらの機能を利用できるかどうかは、サブスクリプションレベルによって異なる場合があります。