Synthesia Review: The Practical Way to Make Training Video at Scale

Synthesia solves a boring but expensive problem: every time a process changes, a training video used to need a new shoot. By replacing the shoot with a script, an avatar and a voice, it lets teams update, translate and publish presenter videos in hours rather than weeks. It will not replace a film crew for emotional storytelling, but for clear, repeatable business communication it is one of the most practical AI video tools available.

What it is

Synthesia is a web-based platform for creating presenter-led videos from text. You write or paste a script, choose an avatar to deliver it, pick a voice and language, arrange scenes with slides, images, screen recordings or brand elements, and render a finished video. The result looks like a presenter speaking to camera, without any filming, microphone or editing suite. The platform is aimed squarely at business use: onboarding, compliance training, product explainers, sales enablement, internal announcements and customer education. Around the core studio sit related tools, including dubbing for translating existing video, interactive elements for quizzes and branching, roleplay sessions for practising real conversations, and a newer agent feature that can draft a video from a description. Teams can share workspaces, invite guests to comment and, on higher plans, collaborate live and manage brand assets centrally.

Key features

The avatar library is the starting point, with more than a hundred avatars on paid plans and more on Enterprise, plus personal avatars that recreate an individual's likeness and voice for repeated use. Creation can start from a prompt, a template, a pasted script, an uploaded document or file, a PowerPoint deck or a blank canvas, and an AI assistant can draft the script and scenes from a short brief. Translation is a major strength: a video can be dubbed into many languages with lip synchronisation, and a one-click translation workflow helps teams serve global staff without re-recording. Media features include screen recording, image and video uploads, closed captions, background music and branded pages, while interactive tools add calls to action, branching choices and quizzes. Higher plans add API access, voice cloning, on-brand avatars and team controls, which matter once video becomes a regular production line rather than an occasional experiment.

Pricing

Synthesia's official pricing page lists a free Basic plan, paid Starter and Pro plans, and a custom Enterprise plan. Basic costs nothing and includes a monthly free allowance of ten minutes of studio video or dubbing, three survey responses and 500 credits, although videos carry a watermark and cannot be downloaded. Starter costs $19 a month and adds 1,250 credits a month, downloads, logo removal, the AI video assistant, dubbing and more than 125 avatars. Pro costs $89 a month and adds 6,000 credits a month, more avatars, personal avatars, branded pages and interactive video. Enterprise is priced by quote and adds unlimited minutes, the full avatar library, single sign-on, live collaboration, brand kits and SCORM export. Credits are the shared currency across video, dubbing, surveys and agent-made video, at roughly 100 credits per finished video minute, so the plan that fits depends on total monthly output, not just video length.

What users like

Users commonly praise Synthesia for ease of use above all else. Many describe turning a script into a professional-looking video in minutes, without filming experience, a camera or an editing timeline, and they value templates and a guided workflow that keeps the result consistent. Time and cost savings are the second major theme, especially for learning teams that previously booked presenters and studios for every course update. Easy editing is closely related: when a policy, product step or price changes, only the script and scenes need updating, not a whole shoot. Multilingual output also draws praise, since one source video can reach staff in many languages with a consistent presenter. Finally, users like the breadth of avatars and voices, which helps different courses feel polished and on-brand without hiring a new presenter for each topic.

What users complain about

The most common complaints concern realism. Some users find avatars flat, stiff or expressionless, with limited gestures, little natural movement around a scene and delivery that can feel rehearsed rather than conversational. Voices draw similar criticism: occasional robotic tone, mispronunciations and pacing that needs careful script formatting, especially for longer or more nuanced material. Customisation is another recurring theme, with users wanting more control over avatar appearance, movement and scene design for highly tailored videos. Limits also frustrate some teams, because monthly minutes and credits can run out quickly once video becomes a regular habit, and the free plan's watermark and lack of downloads make it a trial rather than a production tier. New features can also take a while to learn, particularly around saving avatars and building more complex scenes.

Limitations to know

Synthesia's avatars are presenters, not actors: they speak well to camera but do not walk through a scene, handle objects or show the full range of human emotion, so emotional, dramatic or highly conversational material can feel unconvincing. AI video can also contain warped movement, inconsistent faces or objects across frames, and short clip-length limits in the wider sense, so every video still needs human checking for lip sync, pronunciation, on-screen text and factual accuracy. Personal avatars raise a consent point too: only create an avatar of yourself or of someone who has clearly agreed, and be transparent with viewers that a presenter is AI-generated where that matters. Finally, the credit system means edits are not free: re-rendering, dubbing and agent-made video all draw from the same pool, so a long course with many revisions needs a realistic monthly budget.

Who it is best for

Synthesia is best for learning and development teams, HR, operations, sales enablement and marketing teams that produce regular, repeatable videos: onboarding, safety training, software walkthroughs, policy updates, product explainers and multilingual internal communication. It is ideal when the message matters more than cinematic flair, and when speed, consistency and easy updating outweigh the charm of a live presenter. It is less suited to advertising that needs emotional performance, documentary storytelling, or footage of real people, places and products in motion, where filming remains the honest choice. Small teams should start with the free plan to test avatar and voice quality on their own scripts, then move to Starter once downloads and logo removal matter, and to Pro when monthly volume grows.

Verdict

Synthesia is not the most exciting AI video tool, but it may be the most useful for everyday business video. It removes the cost, scheduling and reshoot pain of presenter content, while keeping quality high enough for training and internal communication, and its translation workflow is a genuine advantage for global teams. The trade-offs are real: avatars can feel stiff, voices need checking, and credits must be budgeted. If your goal is clear, consistent, updatable video at scale, it is an easy recommendation. If your goal is emotional or cinematic storytelling, hire a human presenter instead. Our editorial score: 8.0/10 — our own judgement, not an aggregate of user ratings.

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