⚡ Quick Verdict:
- 価格: Synthesia starts at $18/month. HeyGen offers a free plan with 3 credits per month, then $24/month for Creator.
- 最適な用途: Synthesia for corporate training and education management. HeyGen for sales outreach and ai clone projects.
- 主な違い： Synthesia supports 140+ languages with a powerpoint-like user interface. HeyGen offers 175+ language translation with voice clone in any language.
- Our pick: Synthesia ai for most users — better avatar quality and faster video creation process for training videos.
Choosing between HeyGen vs Synthesia comes down to one 質問.
Do you need professional training videos or personalized marketing videos?
Both tools use artificial intelligence and generative ai to make ai powered video creation simple.
But they take very different approaches to avatar video creation.
HeyGen brings strong ai clone features and a free tier.
Synthesia ai focuses on creating corporate training at scale.
概要
This comparison covers pricing, features, and avatar quality.
We also break down which video generator works best for different teams.
Our sources include published specs, documentation, and user reviews.
By the end, you’ll know which ai video generator fits your needs.
Synthesiaとは何ですか?
Synthesia is an ai video generator built for creating videos at scale.
It helps teams create training videos, how to videos, ai videos, and personalized content. You can update new videos quickly without re-recording.
The platform offers 150+ digital avatars and supports 140+ different languages.
Most users choose it for creating corporate training, creating personalized videos, and internal communications.
The user friendly interface resembles a powerpoint presentation, making it easy to navigate.
You can insert 文章, choose an avatar, and customize the slide deck layout.
シンセシア
⭐ 4.6/5 | 💰 From $18/month. Synthesia ai creates professional videos from text using digital avatars. Trusted by 仕事 and learning and development teams worldwide.
シンセシアの価格
2026年におけるSynthesiaのコストは以下の通りです。詳しく見ていきましょう。
| プラン | 価格 | 最適な用途 |
|---|---|---|
| スターター | 月額18ドル | Solo creators making simple video projects |
| クリエイター | 月額64ドル | Marketing teams creating videos at scale |
| 企業 | カスタム価格設定 | Large companies needing fully branded experience |
Pricing verified March 2026.
無料トライアル: Synthesia offers a free demo video so you can test the avatar quality before paying.
返金保証: No standard money-back guarantee. You can cancel anytime to stop renewal.
📌 注記： Custom avatar creation in Synthesia carries an extra yearly fee of about $1,000 per personalized avatar. This is a separate cost from your enterprise plan.
⚠️ 警告： Synthesia’s pricing plans can be steep for businesses needing extensive video production. The Creator plan jumps from $18 to $64/month, which is a big leap for small teams.
Synthesiaの主な利点
Here’s what makes Synthesia worth considering:
- 150種類以上のAIアバター： Synthesia offers over 150 diverse ai avatars that can be customized to represent different genders, ethnicities, and voices. This enhances relatability in training content.
- 140以上の言語: その テキスト読み上げ engine supports over 120 languages and accents. Synthesia is widely used for creating training, onboarding, marketing, and instructional videos in over 140 languages.
- PowerPoint-like Interface: Synthesia’s user interface is designed to be intuitive, resembling the process of creating a powerpoint presentation. This saves time for new users.
- Closed Captions: Synthesia automatically generates closed captions in the final video. This enhances accessibility for all viewers.
- 内蔵スクリーンレコーダー： The platform includes a screen recorder for creating product walkthroughs and how to videos. Great for software demos and training product launches.
- 簡単なコラボレーション: The platform allows team members to comment on videos linked to specific timestamps. This streamlines feedback during video production.
- ザピエール 統合： Synthesia can be integrated with tools like Zapier to automate video creation processes. This enhances efficiency for marketing teams.
What Our Team Noticed
私たちの 作家 signed up for Synthesia in March 2026 and spent several days exploring the platform. Here’s what stood out:
Synthesiaの長所と短所
✅ メリット
- Supports 140+ different languages for global teams
- PowerPoint-like user interface is easy to navigate
- Automatic closed captions enhance accessibility
- 製品紹介動画用の画面録画機能を内蔵
- Easy collaboration with timestamp comments
❌ デメリット
- No free plan available (paid only)
- Avatars can lack facial expressions and appear unnatural
- Lip syncing does not always align perfectly with dialogue
- カスタムアバターは年間1,000ドルの追加料金がかかります
HeyGenとは何ですか？
HeyGen is an ai powered video creation platform for personalized content at scale.
HeyGen ai helps teams with sales outreach, marketing, and corporate training.
The platform offers over 120 ai avatars and over 300 voice options.
HeyGen is widely used by over 15 million users and 100,000 teams.
HeyGen offers a free trial plus multiple paid tiers for different team sizes.
The drag-and-drop dashboard and 300+ pre-designed templates make it user friendly for non-experts.
ヘイジェン
⭐ 4.5/5 | 💰 Free Plan + $24/month. HeyGen brings customizable ai avatars, voice clone in any language, and personalized outreach videos for sales teams.
HeyGenの価格設定
Here’s what HeyGen costs in 2026. This heygen pricing review covers all current plans. The platform uses a credit system, and heygen’s ai video maker access scales with your tier.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 無料 | 月額0ドル | Testing with 3 credits and watermark |
| クリエイター | 月額24ドル | Solo creators making more videos monthly |
| チーム | 1席あたり月額30ドル | 4Kエクスポートとコラボレーションを必要とするチーム |
Pricing verified March 2026.
無料トライアル: Yes. HeyGen offers a free plan with 3 credits per month. Videos include a watermark and 720p resolution.
返金保証: No standard refund policy. You can cancel anytime to stop renewal.
📌 注記： HeyGen operates on a credit-based pricing model. Each new video or animation you create consumes credits. The annual payment option reduces the heygen plan total cost.
⚠️ 警告： Watch out for heygen credit constraints. Unused AI credits do not carry over into the next month. The Business Plan starts at $89/month and the enterprise plan offers custom pricing.
HeyGenの主なメリット
Here’s what makes HeyGen worth considering:
- 120+ AI Avatars: HeyGen offers over 120 ai avatars for users to choose from. The Avatar IV technology provides ultra-realistic digital presenters with natural micro-expressions and gestures.
- AIクローン作成： HeyGen allows users to create a perfect ai clone of themselves that can talk naturally in any language. The clone is built by recording a short audio recording and a simple video of yourself.
- Voice Clone Feature: その 音声クローン feature can create a lifelike copy of a user’s preferred voice in multiple languages. Clone voice technology produces clear audio without background noise.
- 動画翻訳： Users can translate existing videos into 175+ languages while changing the voice and syncing lip movements. This helps brands keep videos consistent across markets.
- トーキングフォト： Animates a simple image and gives it a natural human voice in over 100 languages. Great for animating history lessons or product marketing visuals.
- コスト削減: HeyGen reduces video production costs by up to 70% compared to traditional methods. The platform includes an API for developers to programmatically generate videos.
- CRM 統合： The platform integrates with CRM data to create personalized videos that address individual prospects by name. Perfect for sales outreach at scale where you need to create personalized videos for thousands of leads.
What Our Team Noticed
Our writer signed up for HeyGen in March 2026 and tested the avatar creation flow. Here’s what stood out from that hands-on time:
HeyGenの長所と短所
✅ メリット
- Free plan with 3 credits per month for testing
- AI clone feels realistic and natural in many languages
- Avatar IV provides ultra-realistic digital presenters
- Voice cloning produces clear audio without background noise
- TalkingPhoto animates static images in 100+ languages
❌ デメリット
- The video creation process can be time consuming
- Credit system limits how many videos you can create
- Unused credits do not roll over each month
- Learning curve steeper than Synthesia for new users
機能比較
HeyGenとSynthesiaの詳細な比較に踏み込む準備はできましたか？
We’ll explore 9 key features to help you choose the right ai video generator. This feature review covers various elements from avatar quality to language support. Together, they cover use cases from eight languages of training videos to global marketing campaigns.
| 特徴 | シンセシア | ヘイジェン |
|---|---|---|
| 開始価格 | 月額18ドル | $24/month (free plan available) |
| 無料プラン | ❌ | ✅（月3単位） |
| AIアバター | 150+ | 120+ |
| 言語 | 140+ | 175+ |
| ボイスクローン | 限定 | ✅ Full clone voice support |
| カスタムアバター | $1,000/year extra | ✅プランに含まれています |
| テンプレート | 60+ Professional | 300+ Templates |
| スクリーンレコーダー | ✅内蔵 | ❌ |
| APIアクセス | ✅ | ✅ |
| 最適な用途 | 企業研修ビデオ | Sales outreach, ai clone |
1. AIアバターライブラリ
シンセシア： Synthesia offers over 150 diverse ai avatars for video creation. The avatars can be customized to represent different genders, ethnicities, and voices. This makes them strong for creating corporate training where representation matters. However, the avatars are often described as lacking facial expressions and appearing unnatural in close up shots.
ヘイジェン: HeyGen offers over 120 ai avatars to choose from or you can create your own. The Avatar IV technology provides realistic avatars that act like real humans, using natural micro-expressions, gestures, and lip-syncing. Users report the avatar realism is strong for talking-head content and the video quality helps you create high quality output. HeyGen brings half body and full body avatar options for different use cases.
2. Voice Options & Voice Clone
シンセシア： The text to speech engine supports over 120 languages and accents. You can add pauses and change the avatar’s voice during video creation. However, the text-to-speech technology can produce voices that sound robotic and lack emotional variation. The ai voices may not be suitable for less serious projects where emotion matters.
ヘイジェン: HeyGen provides a collection of over 300 voices for video creation. The clone voice feature creates a lifelike copy of your preferred voice in multiple languages. The audio recording stays clear without background noise. You can record voice samples to build a custom voice clone matching your natural human voice.
3. AI Clone & Custom Avatar Creation
シンセシア： Users can create a custom avatar based on their likeness for a fee. The cost of creating custom avatars in Synthesia can be high, with a yearly fee of $1,000 per personalized avatar. This makes it more suitable for companies than solo creators on a budget.
ヘイジェン: HeyGen allows users to create a perfect ai clone of themselves that can talk naturally in any language. The process involves recording a short video, which is then used to generate the clone. Users have reported that the ai clone feels realistic and can be indistinguishable from a real person. The instant avatar feature works as a key business mascot for personal brands.
💡 プロのヒント: If creating your own custom avatar matters most, HeyGen wins. The ai clone is included in the heygen plan, while Synthesia charges $1,000/year for the same feature.
4. Video Templates & Customization
シンセシア： The platform provides 60+ professional video templates. You can also start with a blank canvas to create video content from scratch. Users can change the avatar’s voice and language at any time. The platform supports text input, powerpoint presentations, or its built-in script generator.
ヘイジェン: HeyGen features an intuitive drag-and-drop dashboard and over 300 pre-designed templates. You get an extensive array of ready-to-use templates for various video scenarios. The customization options include brand kit support, line breaks, view mode adjustments, and 丸 view for social platform clips.
5. Video Translation & Languages
シンセシア： Synthesia supports multiple languages, allowing businesses to create localized training content for global teams. The 1-click translation feature is great for internal communications across markets. Synthesia is widely used for creating training, onboarding, marketing, and instructional videos in over 140 languages.
ヘイジェン: HeyGen supports over 175 languages and dialects with accurate, natural lip-syncing. Users can translate existing videos into 175+ languages while changing the voice and syncing facial movements. HeyGen brings strong dubbing tools that work well for global product marketing.
6. Video Generation Process
シンセシア： Creating videos in Synthesia is quick and does not require re-recording. You insert text into the interface, choose an avatar, and customize the layout. The platform allows for quick updates to videos without re-recording. Users can customize avatar performances by adding gestures like head nods and raised eyebrows.
ヘイジェン: HeyGen video generation lets users create videos using ai generated avatars and voices. Once you have your text script ready, the platform handles the rest. The video creation process in HeyGen can be time consuming, with users noting that it may take a while to see the final ai generated video after submission.
7. コラボレーションとチーム機能
シンセシア： The platform allows easy collaboration, enabling team members to comment on videos linked to specific timestamps. Synthesia can be integrated with tools like Zapier to automate video creation processes. Synthesia automatically generates closed captions in the final video to boost accessibility.
ヘイジェン: HeyGen offers team collaboration in the Team plan with 4K export. The platform includes an API for developers to programmatically generate videos. CRM integration allows users to create thousands of personalized videos that address prospects by name. The ai generated captions feature adds auto captions automatically.
8. Talking Photos & Special Features
シンセシア： The platform includes a built-in screen recorder for creating product walkthroughs and how to videos. Interactive videos allow viewers to make choices during playback. Synthesia allows users to create personalized welcome videos for new employees automatically. Major use cases include product demos and educational content.
ヘイジェン: HeyGen includes a feature called TalkingPhoto that animates photos and gives them a voice in over 100 languages. The platform can map facial expressions onto a simple image to create animated avatars from static photos. This is great for animating history lessons or health care training without filming actors.
9. 価格設定とコスト
料金プランを並べて比較してみましょう。
| プラン | シンセシア | ヘイジェン |
|---|---|---|
| 無料 | ❌ (Demo only) | 月額0ドル（3クレジット） |
| スターター／クリエイター | 月額18ドル | 月額24ドル |
| 中級クラス | 月額64ドル（クリエイター向け） | 月額30ドル/席（チーム） |
| 企業 | カスタム価格設定 | カスタム価格設定 |
シンセシア： Synthesia’s pricing plans can be considered steep, especially for businesses that require extensive video production. The $18 Starter is competitive, but the jump to $64 Creator is significant. Custom avatars cost $1,000/year extra.
ヘイジェン: HeyGen offers a free trial with 3 credits per month. The creator plan starts at $24/month. The Business plan starts at $89/month and includes more credits for sales outreach. HeyGen reduces video production costs by up to 70% compared to traditional video production methods.
さまざまなシナリオ
Still not sure which video creation tool fits your needs?
この決定マトリックスを使って、あなたにぴったりの相手を見つけてください。
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| 最低開始価格 | シンセシア | 月額18ドル対月額24ドル |
| 無料プランへのアクセス | ヘイジェン | Only tool with a free tier |
| Creating corporate training | シンセシア | 人材開発チーム向けに構築されています |
| AI clone or voice clone | ヘイジェン | Included in heygen plan |
| Sales outreach videos | ヘイジェン | CRM integration & personalization |
| Closed captions automatic | シンセシア | Auto-generated in every video |
| Most language translation | ヘイジェン | 175+ languages supported |
| Easiest user friendly interface | シンセシア | PowerPoint-like flow |
💰 あなたの予算
Synthesia starts at $18/month while HeyGen begins at $24/month for paid plans. HeyGen offers a free tier with 3 credits if you want to test before paying. Both have multiple paid tiers for scaling teams.
🎯 ユースケース
Synthesia excels at corporate training, education management, and creating professional videos at scale. HeyGen shines in product marketing, sales outreach, and ai clone projects. Pick based on which use case matters most to your company.
🔌 あなたの技術スタック
Synthesia integrates with Zapier for automated video creation. HeyGen connects with CRM data for personalized outreach. Both AIツール offer API access for developers who want to integrate ai powered video creation into custom workflows.
🎓 あなたの経験レベル
Synthesia has a gentler learning curve with its powerpoint-like flow. HeyGen offers more customization options but takes more time to master. New users can start recording with either platform quickly with a predefined script.
🆓 無料トライアルとデモ
HeyGen offers a limited version of their ai tool for free as a trial. Synthesia provides a free demo video so you can see the quality before paying. Both options let you test avatar quality and video templates before committing.
🛟 サポートオプション
Both offer email support and detailed knowledge bases. Synthesia provides dedicated account managers on the enterprise plan. HeyGen offers active community forums for users learning the platform’s standout features.
切り替えガイド
Already using one of these ai video creation tools?
Here’s what to expect when switching from one to the other.
🔄 HeyGenからSynthesiaに切り替えますか？
✅ 得られるもの：
- PowerPoint-like user friendly interface for fast video making
- Automatic closed captions in every new video you create
- Better avatar quality for creating corporate training content
❌ 失うもの：
- 無料プランへのアクセス（Synthesiaには無料プランはありません）
- Voice clone in any language without extra fees
- TalkingPhoto feature for animating any simple image
📋切り替え方法：
- Export your HeyGen scripts and download finished videos
- Create a Synthesia account and explore the avatar library
- Recreate videos using Synthesia’s templates and digital avatars
🔄 SynthesiaからHeyGenに切り替えますか？
✅ 得られるもの：
- Free plan to test heygen ai with 3 credits monthly
- Full ai clone creation with your own likeness included
- TalkingPhoto animates photos in over 100 languages
❌ 失うもの：
- 製品紹介動画用の画面録画機能を内蔵
- Automatic closed captions in every video
- PowerPoint-like interface that saves time for new users
📋切り替え方法：
- Download your Synthesia videos and save your text script files
- HeyGenの無料プランに登録してインターフェースをテストしてください
- Rebuild videos using HeyGen’s customizable ai avatars and own templates
What Our Review Didn’t Cover
This comparison focused on individual users and small marketing teams creating videos. We didn’t test enterprise SSO integration or evaluate bulk licensing for large companies. Our observations come from the March 2026 versions of both platforms — new features may have launched since then. We also did not stress-test high-volume API workflows or compare advanced facial recognition tuning. If your team needs deep customization beyond standard customization options, your priorities may differ from what we’ve covered here.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格対価値 | シンセシア |
| 🎭 アバターの品質 | シンセシア |
| 🎙️ Voice Clone | ヘイジェン |
| 🌍 言語翻訳 | ヘイジェン |
| 🎨 Video Templates | ヘイジェン |
| 🧬 AI Clone Feature | ヘイジェン |
| 👶 User Friendly Interface | シンセシア |
| 👥 コラボレーション | シンセシア |
| 📋 Corporate Training | シンセシア |
| 🏆総合優勝 | シンセシア |
🏆 受賞者：シンセシア
Synthesiaは9部門中5部門で受賞した。
最適な用途: Corporate training, education management, multilingual training videos, internal communications
Synthesia and HeyGen are two different ai video generation tools.
Synthesia is the polished video communications platform built for training and education.
HeyGen is the creative content creation platform built for sales outreach and ai clone projects.
HeyGen excels if you need a free starting point or want a personal ai clone.
However, if you need professional videos with knowledgeable and enthusiastic employees on screen, Synthesia is the better choice.
Synthesia ai also wins on avatar quality, ease of use, and corporate training workflows.
Both tools produce amazing results when you give them enough time to render properly.
Synthesiaの比較
Here’s how Synthesia stacks up against other ai video 発電機:
Synthesia vs コロサイ
Synthesiaが優れている点： Language support breadth, polished avatar quality, larger template library
コロシアンの勝利： Emotional avatar expressions, scenario-based branching, conversational characters
Synthesia vs ヴィード
Synthesiaが優れている点： AI avatar realism, dedicated training video flows, automatic closed captions
Veedが勝利した理由： General video editing tools, subtitle generation, social platform clip workflows
Synthesia vs Tavus
Synthesiaが優れている点： Training video templates, real actor-like avatars, easy collaboration features
Tavus wins on: Scalable video communications across campaigns, single video template personalization, marketing suite
Synthesia vs ディープブレイン 人工知能
Synthesiaが優れている点： Personalization features, user friendly interface, integration with Zapier
DeepBrain AIが勝利した点： Real-time avatar streaming, cloud-based delivery, conversational ai presenters
Synthesia vs ルーメン5
Synthesiaが優れている点： AI avatar generation, corporate training workflows, more avatars and voice options
Lumen5 wins on: Blog-to-video conversion, repurposing static text, Talking Head feature with uploaded video
HeyGenの比較をもっと見る
Here’s how HeyGen stacks up against other ai video creation tools:
HeyGen vs コロシアン
HeyGenが勝利した点： Full ai clone creation, free plan access, TalkingPhoto for animating simple image
コロシアンの勝利： Scenario branching, emotional avatar expressions, conversation flow design
HeyGen vs Tavus
HeyGenが勝利した点： Avatar library size, voice clone in any language, more standout features overall
Tavus wins on: Single template personalization at scale, dedicated marketing suite, campaign workflows
HeyGen vs DeepBrain AI
HeyGenが勝利した点： Custom avatar creation included, voice cloning quality, personalization functions
DeepBrain AIが勝利した点： Real-time avatar streaming, cloud-based delivery, conversational ai
HeyGen vs Lumen5
HeyGenが勝利した点： Ai clone creation, 175+ language translation, ultra-realistic Avatar IV technology
Lumen5 wins on: Blog-to-video conversion, drag-and-drop text interface, Talking Head feature
HeyGen vs Rephrase AI
HeyGenが勝利した点： Avatar realism, voice clone quality, fewer robotic voice issues
Rephrase AI wins on: Script variable personalization, text-to-video オートメーション, digital avatar variables
よくある質問
SynthesiaとHeyGen、どちらが良いですか？
Synthesia is better for creating corporate training in 140+ languages with a user friendly interface. HeyGen is better for ai clone and sales outreach with 175+ language translation.
HeyGenは無料で利用できますか？
Yes. HeyGen offers a free plan with 3 credits per month. Videos include a watermark and 720p resolution. Paid plans start at $24/month for the creator plan.
Synthesia の料金はいくらですか?
Synthesia ai costs $18/month for the Starter plan. The Creator plan jumps to $64/month for marketing teams. Enterprise plan uses custom pricing based on your team’s needs.
Can I create my own ai clone on HeyGen?
Yes. HeyGen allows users to create a perfect ai clone by recording a short simple video. The instant avatar can then talk naturally in any language with your voice clone.
Synthesia AIは安全に使用できますか？
Yes. Synthesia is trusted by major enterprises for training videos and internal communications. It has strict content policies and SOC 2 compliance to keep video content secure.
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