⚡ Quick Verdict:
- 価格: Synthesia starts at $18/month vs Synthesys at $20/month
- 最適な用途: Synthesia for AI avatars and global team training, Synthesys for voice generation and AI talking photos
- 主な違い： Synthesia supports 140+ languages with SOC 2 Type II compliance, while Synthesys focuses on a 400+ voice library and dynamic gesture control
- Our pick: Synthesia for most users — its AI avatars, language coverage, and enterprise 安全 make it the better all-rounder for video creation
Choosing between Synthesia and Synthesys comes down to one question.
Do you need realistic AI avatars or a deep voice generation library?
Both tools promise fast, AI-powered video creation without filming.
しかし、彼らは同じ目標に対して全く異なるアプローチを取っている。
Synthesia leans into avatars, languages, and enterprise security.
Synthesys leans into voice generation, talking photos, and dynamic gestures.
概要
This Synthesia vs Synthesys comparison covers pricing, features, and ease of use.
We also break down who each AIビデオ creation platform works best for.
私たちの 作家 signed up for both tools and explored the editors hands-on.
Other observations come from documentation, pricing pages, and G2 reviews.
By the end, you’ll know which tool fits your video creation needs.
Synthesiaとは何ですか?
Synthesia is an AI video creation platform that turns text into video.
It uses AI avatars to deliver scripts on screen — no camera needed.
The platform includes 230+ stock avatars and supports 140+ languages.
You can also create custom models from your own face and voice.
Most users pick Synthesia for training videos, product demos, and explainers.
Big names like Google, BBC, and Reuters use it as a great company-wide tool for internal video.
Compared to traditional video editing tools, Synthesia helps you save time on long shoots.
シンセシア
⭐ 4.6/5 | 💰 From $18/month. Create AI videos in 140+ languages with realistic avatars. No camera or studio required.
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 short videos |
| クリエイター | 月額64ドル | Marketers and trainers needing more minutes |
| 企業 | カスタム価格設定 | Teams with custom models and SSO needs |
Pricing verified April 2026.
無料トライアル: Yes. A free plan is available with limited video minutes per month. No credit card required to start.
返金保証: Synthesia does not offer a standard money-back guarantee. You can downgrade or cancel monthly plans before the next billing date.
📌 注記： The Starter plan caps you at 10 video minutes per month. Heavy users will quickly hit the limit and need the Creator plan.
⚠️ 警告： Custom AI avatars are only available on the Enterprise plan. Plan ahead if your team needs branded talent.
Synthesiaの主な利点
Here’s what makes Synthesia worth considering:
- 膨大なアバターライブラリ： Pick from 230+ AI avatars across ages, ethnicities, and outfits. The avatars deliver natural facial expressions and gestures while reading your script.
- 140以上の言語をサポート： Translate scripts and audio into more than 140 languages with one click. This makes Synthesia a fit for global teams reaching a broader audience.
- エンタープライズセキュリティ： The platform is SOC 2 Type II compliant. That matters for mid-to-large companies that need stricter security for video content.
- PowerPointのインポート: Upload PowerPoint プレゼンテーション and turn each slide into a narrated AI video. This saves time when repurposing existing training material.
- Custom AI Avatars: Record yourself once and create your own AI clone. The clone reads any script in your voice and language.
- 内蔵スクリーンレコーダー： Capture screen demos right inside the editor. You can mix screen footage with avatar scenes in one project.
- LMS統合： Synthesia exports videos in formats friendly to Learning Management Systems. This is useful for HR and L&D teams pushing courses to paying customers or staff.
- Built-in Voice Generation: Voice generation is paired with each avatar so you can render full video plus narration in a few seconds. Renders are quick once your script is ready.
- Tiered Editions: A basic edition for solo users and an advanced edition for teams give you room to scale. Sales teams chasing job leads use the avatars to send personalized アウトリーチ videos at scale.
What Our Team Noticed
Our writer signed up for Synthesia and spent several days exploring the video editor. Here’s what stood out from that hands-on time:
Synthesiaの長所と短所
✅ メリット
- 230+ realistic AI avatars with natural facial expressions
- 140+ languages supported with one-click translation
- 企業セキュリティにおけるSOC 2タイプII準拠
- PowerPoint import speeds up training video creation
❌ デメリット
- Starter plan limits you to 10 video minutes per month
- Custom AI avatars locked behind the Enterprise plan
- No public refund policy on monthly subscriptions
Synthesysとは何ですか?
Synthesys is an AI video creation platform with a strong voice focus.
It generates AI voices, AI humans, and AI talking photos from text.
The platform has a 400+ voice library with cloning options.
You can also fine-tune avatar gestures using dynamic gesture control.
Marketers, YouTubers, and small ventures use it for quick video and audio content.
The price point sits between budget tools and enterprise platforms.
シンセシス
⭐ 3.8/5 | 💰 From $20/month. Build AI videos, voices, and talking photos with a 400+ voice library and gesture control.
シンセシスの価格
Here’s what Synthesys costs in 2026. Let’s break it down.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 個人的 | 月額20ドル | Solo creators making short voice and video clips |
| クリエイター | 月額41ドル | YouTubers and フリーランサー needing more output |
| 仕事 | 月額69ドル | Small teams creating regular video content |
Pricing verified April 2026.
無料トライアル: Synthesys offers a free trial with limited credits to test voice generation. No long-term commitment required to try the editor.
返金保証: Synthesys offers a 7-day money-back guarantee on annual plans. Monthly plans can be canceled before the next billing cycle.
📌 注記： The Personal plan limits the number of word credits and video minutes per month. Heavy YouTubers will likely outgrow it within weeks.
⚠️ 警告： Some advanced voices and AI human styles require add-on credits even on the Business plan. Check the plan details before subscribing.
Synthesysの主な利点
Here’s what makes Synthesys worth considering:
- 400+ AI Voices: The voice library covers many accents and languages. You can also clone a voice and pick specific voice tones to match your brand.
- Dynamic Gesture Control: Fine-tune the way an AIアバター moves on screen. This adds dynamic results to product demos and explainer videos.
- AIが話す写真： Upload a still photo and turn it into a talking head video. It works well for animating uploaded photos and HD photos of historical figures or characters.
- 多言語サポート: Generate audio and video content in multiple languages. The audio translations feature helps you reach a broader audience.
- シンセシス・ラボ： An experimental space for testing newer voice and avatar features. Useful for power users who want 早い アクセス。
- Affordable Mid-tier: The Creator plan at $41/month sits below Synthesia’s Creator plan. That gives small ventures a softer step-up between solo and team plans.
- AIメディアを生成する： Beyond avatars, the tool can generate AI images and short clips. This expands what you can ship from one tool, and can replace some basic professional retouching steps for product imagery.
- Photo-to-Video Workflows: Pair AI talking photos with more photos from your brand library to create professional headshots-style intros or character reels. You can create professional headshots-quality avatars from clean source images and reuse them across campaigns.
What Our Team Noticed
Our writer signed up for Synthesys and spent time inside the editor. Here’s what stood out from that hands-on session:
Synthesysの長所と短所
✅ メリット
- Library of 400+ AI voices with cloning options
- Dynamic gesture control for fine-tuning avatar motion
- AI talking photos animate static images into video
- Creator plan is cheaper than Synthesia’s mid-tier
❌ デメリット
- Smaller AI human library than Synthesia’s avatar pool
- Lower overall rating reflects mixed user feedback
- Some premium voices and avatars need extra credits
機能比較
Ready to dive into a detailed Synthesia vs Synthesys comparison?
We’ll explore eight key features to help you decide which platform fits your video creation goals.
| 特徴 | シンセシア | シンセシス |
|---|---|---|
| 開始価格 | 月額18ドル | 月額20ドル |
| 無料プラン | ✅ | ✅ |
| AIアバター | ✅ (230+) | ✅ (smaller pool) |
| 音声ライブラリ | ✅ | ✅ (400+ voices) |
| Custom Models | ✅（企業向け） | ✅（数量限定） |
| サポートされている言語 | 140+ | 複数の言語 |
| PowerPointのインポート | ✅ | ❌ |
| AIが話す写真 | ❌ | ✅ |
| Dynamic Gesture Control | 限定 | ✅ |
| SOC 2 タイプ II | ✅ | ❌ |
| 最適な用途 | Training, global teams | Voice-heavy content |
1. AIアバター
シンセシア： Synthesia offers 230+ AI avatars across ages, ethnicities, and outfits. The avatars produce natural facial expressions and gestures while reading your script. According to G2 reviews, the avatar quality is one of the most praised parts of the platform for training videos.
シンセシス： Synthesys calls its avatars “AI Humans” and ships a smaller library than Synthesia. The trade-off is dynamic gesture control, which lets you tweak how the AI human moves on screen. That can produce more dynamic results for product demos.
2. 音声生成
シンセシア： Synthesia includes solid text-to-speech tied to each avatar’s voice. The voices sound natural in English and most major languages. The platform is built around video first, so voice generation supports the avatar rather than acting as a standalone product.
シンセシス： Synthesys ships 400+ AI voices with voice cloning baked in. You can pick specific voice tones — calm, excited, neutral — without recording extra takes. For voice-first creators, this library is the main reason to pick Synthesys.
3. Language Support and Translation
シンセシア： Synthesia supports 140+ languages with one-click video translation. This makes Synthesia a fit for global teams running training in many regions. The platform handles script, voice, and subtitles together — useful when running a translation project across regions.
シンセシス： Synthesys supports multiple languages but covers fewer regions than Synthesia. The audio translations feature is its strongest multilingual tool. For voice-only output across languages, it works well — for full localized video at scale, Synthesia goes further.
4. Video Editor and User Interface
シンセシア： The video editor uses a clean, slide-based layout. Each scene works like a slide, which makes the platform feel familiar to users who already build PowerPoint presentations. The user interface is built for non-editors who want to create content fast.
シンセシス： The Synthesys editor groups voice, video, and image tools in separate workspaces. The user interface takes a bit longer to learn for first-time users. Once you get past the initial setup, the controls feel flexible — especially around voice fine-tuning.
5. Customization Features
シンセシア： Customization features in Synthesia cover scenes, brand kits, on-screen text, and basic shapes. Enterprise users can also create custom models — including custom AI clones of real employees. That makes branded training videos far easier to produce at scale.
シンセシス： Synthesys focuses customization on voice tone, gesture control, and avatar style. The Face Form feature lets you adjust how an AI human’s face appears on screen. Customization runs deep on voice and motion, but lighter on full scene templates.
6. PowerPoint and Asset Import
シンセシア： Synthesia lets you upload PowerPoint presentations and turn each slide into a narrated AI video. This is a big time-saver when repurposing existing training decks. The import works well for course creators moving from static slides to AI video.
シンセシス： Synthesys does not offer direct PowerPoint import in the same way. You can upload assets like images and scripts, but slide-by-slide conversion is not the focus. For deck-driven training content, this is a real gap compared to Synthesia.
⚠️ 警告： If your team already runs training off PowerPoint presentations, Synthesia saves you a manual rebuild step. Test the import on a real deck before committing.
7. セキュリティとコンプライアンス
シンセシア： Synthesia meets SOC 2 Type II compliance. That fits the higher security standards preferred by mid-to-large sized businesses. Verification successful waiting screens, secure share links, and SSO support give IT teams more control over who sees what.
シンセシス： Synthesys does not advertise the same SOC 2 Type II posture publicly. Standard account security and HTTPS are in place, and a Cloudflare Ray ID may appear if the site properly blocks suspicious traffic. For teams in regulated industries, the gap matters.
8. 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 | シンセシス |
|---|---|---|
| 無料 | 無料プランあり | 無料トライアルあり |
| 入門／初心者向け | Starter — $18/month | Personal — $20/month |
| 中級クラス | Creator — $64/month | Creator — $41/month |
| トップクラス | Enterprise — Custom Pricing | Business — $69/month |
シンセシア： Synthesia’s $18 Starter is the cheapest entry point in this comparison. The jump to the $64 Creator plan is steep, but you unlock more video minutes and better team features. Enterprise pricing is custom — fit for companies needing custom models and SSO.
シンセシス： Synthesys starts $2 higher than Synthesia at $20/month. The mid-tier Creator plan at $41/month is cheaper than Synthesia’s mid-tier. The Business plan caps at $69/month and is fully transparent — no need to talk to sales.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| Tight budget entry plan | シンセシア | $18/month vs $20/month |
| Cheaper mid-tier plan | シンセシス | $41/month vs $64/month |
| リアルなAIアバター | シンセシア | 230+ avatars and natural gestures |
| 豊富な音声ライブラリ | シンセシス | 400+ voices with cloning |
| 140以上の言語 | シンセシア | Wider language coverage |
| SOC 2 タイプ II 準拠 | シンセシア | Enterprise security baked in |
| AI talking photos | シンセシス | Animates uploaded photos |
💰 あなたの予算
Synthesia wins on the entry plan at $18/month. Synthesys wins on the mid-tier with a $41 Creator plan against Synthesia’s $64.
🔌 あなたの技術スタック
Synthesia integrates well with LMS tools and PowerPoint workflows. Synthesys fits creators who already use AI image and audio tools alongside video.
📝 あなたのコンテンツスタイル
Synthesia suits training, onboarding, and explainer videos with consistent branding. It’s a fit if you’re starting a new job in L&D and need to ship courses fast. Synthesys fits voice-heavy content like audiobooks, narrated reels, and short YouTube clips.
🎓 あなたの経験レベル
Synthesia’s slide-based editor feels easy for beginners coming from PowerPoint. Synthesys takes a bit longer to learn because voice, video, and image tools live in separate workspaces.
🆓 無料トライアルとデモ
Both platforms let you test the editor before paying. Use the free trial to confirm avatar and voice quality on a real script — not just the homepage demo.
🛟 サポートオプション
Synthesia provides knowledge base, email support, and dedicated reps for Enterprise. Synthesys offers email and chat support, with response times that vary by plan.
切り替えガイド
既にこれらのツールのいずれかをご利用ですか？切り替える場合、どのような変更が予想されますか？
🔄 SynthesiaからSynthesysに切り替えますか？
✅ 得られるもの：
- Access to a 400+ voice library and voice cloning options
- Dynamic gesture control for fine-tuning AI human movement
- AI talking photos to animate uploaded photos and HD photos
❌ 失うもの：
- The 230+ AI avatar library and the broader language reach
- One-click PowerPoint presentations import for training videos
- SOC 2 Type II compliance for stricter enterprise needs
📋切り替え方法：
- Export your finished Synthesia videos as MP4 files for backup
- Sign up for a Synthesys account and pick the plan that matches your output volume
- Rebuild your top scripts inside Synthesys, starting with voice tone choices
🔄 SynthesysからSynthesiaへの移行をお考えですか？
✅ 得られるもの：
- Access to 230+ AI avatars and 140+ language translation
- SOC 2 Type II compliance and LMS-friendly export options
- Direct PowerPoint import for fast course creation
❌ 失うもの：
- The 400+ voice library and granular voice tone controls
- Dynamic gesture control for fine-tuning avatar movement
- The AI talking photos feature for animated still images
📋切り替え方法：
- Export your Synthesys videos and audio files as MP4 and WAV
- Create a Synthesia account and start with the Starter or Creator plan
- Rebuild your top videos using Synthesia’s avatars and language tools
What Our Review Didn’t Cover
This Synthesia vs comparison focused on solo creators, marketers, and mid-sized teams. We did not stress-test enterprise SSO setups or evaluate translation API glossary controls in depth. We also didn’t run the AutoML translation pipeline at scale or test how the Seaplace Group and similar localization vendors plug in. Custom Enterprise pricing for both tools also wasn’t part of this review. If you’re shipping training videos for tens of thousands of paying customers — or planning the rollout as your next job in L&D — your priorities and contract terms may differ from what we’ve covered here.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰 Pricing (Entry Plan) | シンセシア |
| 🚀 AI Avatars | シンセシア |
| 🎙️ 音声ライブラリ | シンセシス |
| 🌍 言語サポート | シンセシア |
| 👶 使いやすさ | シンセシア |
| 🔒 セキュリティとコンプライアンス | シンセシア |
| 🎨 Customization (Voice/Gesture) | シンセシス |
| 🏆総合優勝 | シンセシア |
🏆 優勝：シンセシア
Synthesiaは7部門中5部門で受賞した。
最適な用途: Training videos, global team onboarding, course creation, enterprise communications
Synthesia and Synthesys are two very different products.
Synthesia is a video-first platform built around AI avatars, language reach, and enterprise security.
Synthesys is a voice-first platform with deeper voice tones, AI talking photos, and gesture control.
Synthesys is excellent for voice-heavy creators and small ventures with tight mid-tier budgets.
However, if you need realistic avatars, 140+ languages, and SOC 2 Type II compliance, Synthesia is the better choice.
Synthesiaの比較
Here’s how Synthesia stacks up against other AI video tools:
Synthesiaが優れている点： Larger language list, SOC 2 Type II compliance, smoother PowerPoint import for training
ヘイジェン 勝利したタイトル： Faster custom avatar creation from a short selfie video, more lip-sync flexibility, lower mid-tier pricing
Synthesia vs コロサイ
Synthesiaが優れている点： Bigger avatar pool, broader language coverage, more polished editor for non-technical users
コロシアンの勝利： Built-in conversation scenes between two avatars, scenario-based learning templates, branching interactive videos
Synthesia vs ヴィドノズ
Synthesiaが優れている点： Higher avatar realism, stronger enterprise security, better fit for serious training projects
Vidnozが勝利した点： Generous free tier, lower entry pricing, simpler tools for short social videos and quick clips
Synthesia vs した
Synthesiaが優れている点： Full multi-scene video editor, 140+ language reach, LMS-friendly export options for course delivery
D-IDが勝利した点： Quick photo-to-video animations, simpler API access for developers, lighter pricing for one-off avatar clips
Synthesysの比較をもっと見る
Here’s how Synthesys stacks up against other voice and video tools:
Synthesysが勝利した点： Larger 400+ voice library, AI talking photos for static images, deeper voice tone fine-tuning
HeyGenが勝利した点： More polished AI avatars, faster custom clone creation, stronger video-first editor experience
Synthesys vs Speechify
Synthesysが勝利した点： Combined voice plus video output, AI human avatars for full talking-head clips, broader media generation tools
Speechifyが勝利した点： Sharper text-to-speech for long-form reading, stronger mobile and browser apps, better pricing for audio-only use
Synthesys vs フリキ
Synthesysが勝利した点： Realistic AI human avatars, dynamic gesture control, AI talking photos for animated stills
フリキが勝利： Article-to-video conversion, large stock media library, simpler workflow for blog repurposing
Synthesys vs ビデオ内
Synthesysが勝利した点： AI voice cloning, AI human avatars, gesture-level control over on-screen presenters
InVideoが勝利した点： Massive template library, traditional video editor with stock footage, better fit for branded social videos
よくある質問
Synthesiaよりも優れたものは何ですか？
For most use cases, Synthesia is hard to beat thanks to its avatar quality and language reach. HeyGen is a strong alternative for faster custom avatars, while Colossyan is a fit for branching scenario videos. The best option depends on whether you value language coverage, avatar realism, or training-specific features.
Synthesiaは完全に無料ですか？
No. Synthesia offers a free plan with limited monthly video minutes, but full access requires a paid plan starting at $18/month. The free plan is enough to test avatars and basic editing on short clips. Heavy users will outgrow it quickly.
What is the difference between synthesis and synthesize?
“Synthesis” is the noun and “synthesize” is the verb. Synthesis combines multiple sources into new insights, while synthesizing is the act of doing it — interpreting データ and producing dynamic results rather than just restating one source. In tools like Synthesia and Synthesys, that idea applies to combining script, voice, and avatar into one video.
What are the two types of synthesis?
In academic writing, the two types are explanatory synthesis and argumentative synthesis. Explanatory synthesis explains a topic using multiple sources, while argumentative synthesis builds a position by weighing connections, trends, or contradictions. Program synthesis is a separate concept where artificial intelligence generates computer code from examples or natural language.
Which is the best AI video creation platform?
Based on this comparison, Synthesia wins overall for AI video. It offers more avatars, more languages, and stronger security. Synthesys is the better pick if voice generation, AI talking photos, or gesture control are your top priorities.
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