What Is Synthesia?Synthesia 是什么？
Synthesia is a London-based AI video platform (founded 2017) that turns plain text into presenter-led videos with AI avatars — no mics, cameras, actors or studios. Write a script (or let the AI Assistant draft it from your brand kit), pick an avatar and layout, render, and edit text to regenerate — the standard workflow for corporate training, onboarding, compliance and sales enablement at scale.Synthesia 是伦敦 AI 视频公司（2017 年创立），把纯文本变成 AI 虚拟人主讲的视频——不用麦克风、摄像机、演员和摄影棚。写脚本（或让 AI Assistant 按品牌规范起草）、选形象和版式、渲染；改动时改文字重新渲染——是企业培训、入职、合规、销售赋能的规模化标准流程。
The business behind it: in January 2026 Synthesia raised a $200 million Series E at a $4 billion valuation, led by GV (Google Ventures) with participation from NVIDIA's venture arm and existing investors including Accel and Kleiner Perkins — nearly doubling its $2.1 billion valuation from a year earlier. It reports 60,000+ companies and 1M+ users, and says it is used by more than 90% of the Fortune 100.公司层面：2026 年 1 月 Synthesia 完成 E 轮 $2 亿美元融资、估值 $40 亿，Google Ventures（GV）领投，NVIDIA 旗下创投及 Accel、Kleiner Perkins 等老股东参投——一年前 $21 亿估值近乎翻倍。官方数据：60000+ 企业、100 万+用户，90%+ Fortune 100 在用。
Synthesia 3.0 (launched October 2025) moved the product from one-way video to interactive video: Video Agents that talk, listen and respond in real time (sales role-play, training Q&A, employee coaching with performance scoring), and Express-2 avatars with full-body presence — facial expressions, lip sync, natural hand and body gestures, micro-expressions. The library spans 240+ stock avatars, 160+ languages, 1,000+ AI voices and 30+ language AI dubbing.Synthesia 3.0（2025 年 10 月上线）把产品从单向视频推向交互视频：Video Agents 可实时对话、倾听、回应观众（销售陪练、培训问答、员工教练带打分），Express-2 形象是全身像——面部表情、口型同步、自然手势和肢体动作、微表情。形象库 240+ 虚拟人、160+ 语言、1000+ AI 声音，AI 配音覆盖 30+ 语言。
Synthesia is the clearest case of AI video as boring infrastructure: the $200M Series E at a $4B valuation (January 2026, GV-led) is a bet on repeatable enterprise workflows — onboarding, compliance, enablement — not viral clips. Video Agents push that thesis further: "an LLM with a face" that can role-play customers and score employees makes training interactive without booking a single studio. The honest costs: the minute-based meter means a five-person L&D team is really buying five subscriptions; minutes expire monthly; and top-end avatar realism still trails HeyGen per several 2026 reviews. Verdict: if your video need is training, onboarding or compliance at scale with SSO, SCORM and brand governance, this is the default enterprise choice — test with the free plan, budget at Enterprise for any serious program.
Synthesia 是「AI 视频作为无聊基础设施」最清晰的案例：2026 年 1 月 E 轮 $2 亿美元、$40 亿估值（GV 领投）押注的是可重复的企业工作流——入职、合规、赋能，而不是病毒短视频。Video Agents 把这个逻辑推得更远：「带脸的 LLM」可以扮演客户、给员工打分，不用订一个摄影棚。真实代价：按分钟计费意味着五人 L&D 团队实际上要买五个订阅；分钟额度按月过期；多家 2026 年评测指出顶级形象的真实感仍不如 HeyGen。结论：如果你的需求是规模化的培训、入职、合规视频，还要 SSO、SCORM 和品牌治理，这是企业默认选项——先用免费档试，正式项目按 Enterprise 做预算。
— 中国吧 AI Tools Hub Editorial Team
Who Should Use Synthesia?谁适合使用Synthesia？
✓ Good Fit For适合以下场景
- Corporate training / onboarding teams shipping the same video across regions企业培训/入职团队：同一视频要发往多个地区
- Compliance and enablement content needing SCORM, SSO and brand governance合规与赋能内容：需要 SCORM、SSO 和品牌治理
- Teams wanting interactive role-play / coaching via Video Agents想用 Video Agents 做交互式陪练/教练的团队
✕ Not Ideal For不适合以下场景
- Social/creative video chasing top-end avatar realism — see HeyGen追求顶级形象真实感的社交/创意视频——看 HeyGen
- Daily high-volume publishing — the minute meter gets expensive fast日更高频发布——按分钟计费很快会变贵
- Single-seat buyers expecting multi-seat collaboration on low tiers低档位就想多人协作的买家——每个档位只含一个编辑席位
Getting Started with SynthesiaSynthesia 快速开始
1. Start on the Free plan: ~10 min/month, watermark, no downloads — enough to judge avatar quality (no card required)从 Free 档开始：约 10 分钟/月、带水印、不可下载——足够判断形象质量（免绑卡）2. Write the script in-app (AI Assistant drafts from your brand kit), pick an Express-2 avatar, add scenes, layouts and on-screen text站内写脚本（AI Assistant 按品牌规范起草）、选 Express-2 形象，加场景、版式和屏幕文字3. Render → export MP4 / embed / branded page; for LMS tracking upgrade to Enterprise for SCORM. Mind the minute meter (prices per official site)渲染 → 导出 MP4 / 嵌入 / 品牌页面；要 LMS 追踪上 Enterprise 拿 SCORM。注意分钟额度（价格以官网为准）Key Features核心功能
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Video Agents: Real-Time Interactive VideoVideo Agents：实时交互视频 — Synthesia 3.0's headline feature: avatars that talk, listen and respond to viewers in real time — role-play customers or colleagues, run training Q&A, and score employee performance.Synthesia 3.0 的头牌功能：能和观众实时对话、倾听、回应的虚拟人——扮演客户或同事、做培训问答、给员工表现打分。
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Express-2 Full-Body AvatarsExpress-2 全身像 — Facial expressions, lip sync, natural hand and body gestures and micro-expressions — a leap from earlier talking-head avatars; 240+ stock avatars plus personal avatars.面部表情、口型同步、自然手势和肢体动作、微表情——相比早期的大头贴形象是质的飞跃；240+ 形象库，加个人形象定制。
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160+ Languages, AI Dubbing160+ 语言、AI 配音 — One-click translation and localization into 160+ languages and accents; AI dubbing translates existing video into 30+ languages with lip-sync.一键翻译本地化到 160+ 语言和口音；AI 配音把已有视频翻成 30+ 语言、带口型同步。
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SCORM Export & LMS IntegrationSCORM 导出与 LMS 集成 — Export videos as SCORM packages for tracked training on your LMS (Enterprise); direct upload paths to Articulate, Cornerstone and SAP SuccessFactors.导出 SCORM 包进 LMS 做可追踪培训（Enterprise）；直传 Articulate、Cornerstone、SAP SuccessFactors。
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Enterprise Compliance Stack企业级合规栈 — SOC 2 Type II, GDPR, ISO 27001 and ISO 42001 with SAML/SSO, brand kits and review-and-approval workflows — compliance is core product, not an add-on.SOC 2 Type II、GDPR、ISO 27001、ISO 42001，配 SAML/SSO、品牌规范和审核审批流——合规是产品本体，不是外挂。
Pros & Cons优缺点
✓ Good Fit For适合以下场景
- The enterprise default: 90%+ Fortune 100, SCORM, SSO, brand governance企业默认选项：90%+ Fortune 100、SCORM、SSO、品牌治理
- Video Agents make training genuinely interactive, not just recordedVideo Agents 让培训真正交互起来，不只是录播
- 160+ languages with one-click translation — global rollouts in days160+ 语言一键翻译——全球铺开按天算
- Edit text to regenerate — no rebooking presenters, no reshoots改文字就重渲染——不用重新约人、不用重拍
✕ Not Ideal For不适合以下场景
- Minute-based pricing — allowances expire monthly, no rollover, no top-up按分钟计费——额度按月过期，不累积，不能加购
- Top-end avatar realism trails HeyGen in several 2026 reviews多家 2026 评测认为顶级形象真实感不如 HeyGen
- One editor seat per plan — teams effectively pay per seat每个档位只含一个编辑席位——团队实际按席位付费
Use Cases应用场景
Popular ways people use Synthesia.人们使用Synthesia的常见场景：
🎓 Corporate Training & Onboarding企业培训与入职
The core Synthesia workflow: turn policies, SOPs and product knowledge into branded avatar videos in 160+ languages, with SCORM export for LMS tracking.Synthesia 的核心工作流：把制度、SOP、产品知识变成品牌化虚拟人视频，160+ 语言，SCORM 导出进 LMS 追踪。
🗣️ Sales Role-Play with Video AgentsVideo Agents 销售陪练
Real-time interactive avatars that play the customer — reps practice objection handling live and get scored, without booking a single studio.实时交互的虚拟人扮演客户——销售当场练异议处理并被打分，一个摄影棚都不用订。
✅ Compliance Updates合规更新
Regulations change; edit the text and re-render instead of reshooting — keep compliance content current across every region.法规变了，改文字重渲染就行，不用重拍——让合规内容在每个地区都保持最新。
📣 Internal Communications内部沟通
Leadership updates, product launches and enablement content as presenter videos — faster than all-hands meetings, localizable in one click.高管讲话、产品发布、赋能内容做成主讲视频——比全员大会快，一键本地化。
Similar AI Tools相似 AI 工具
If Synthesia doesn't fit your needs, here are other popular AI tools you might consider — for a more realism-first avatar alternative see our full review: HeyGen.如果Synthesia不符合你的需求，可以看看这些热门 AI 工具——更偏真实感的虚拟人替代可参考本站完整评测：HeyGen。