Synthesia Review: Is AI Video Worth It for a Small Business’s Marketing?

Synthesia turns a written script into a video of a talking AI avatar, in over 140 languages, without a camera, a studio, or an actor. That pitch is genuinely appealing to a small business that knows it should be doing more video but doesn’t have the time, budget, or on-camera talent to do it the traditional way. The question worth answering honestly is whether «AI avatar reads your script» is actually the kind of video your marketing needs — because for a lot of small businesses, it isn’t.

What Synthesia actually does

You write or paste a script, pick an AI avatar (Synthesia now offers 180+ stock avatars, or you can build a custom one of yourself or an employee), choose a template layout, and Synthesia generates a video of that avatar speaking your script with lip-synced audio. You can add slides, screen recordings, background music, and basic branding. It’s built for repeatable, script-driven video: training modules, product explainers, onboarding content, internal comms, and localized versions of the same video in dozens of languages without re-shooting anything.

Creating a custom avatar of yourself or a team member requires that person to record a short consent script directly through Synthesia — a safeguard against the tool being used to clone someone’s likeness without their knowledge. It’s a good policy, but it also means custom avatars aren’t instant; someone has to sit down and go through the process.

What producing a video actually looks like

The workflow is genuinely simple, which is part of the appeal. You start from a blank canvas or a template, paste in a script (or write it directly in the editor), pick an avatar and a background, and Synthesia handles pacing, lip-sync, and basic gestures automatically. You can swap in your own slides, screen recordings, or brand colors. A first draft of a two-minute explainer takes maybe 15–20 minutes of setup, and once it’s rendered, editing means changing the text and re-rendering the affected section — not reshooting. That speed is the entire value proposition, and it holds up in practice for straightforward, talking-head-style content.

Where it gets slower is anything outside that format: cutting between multiple camera angles, adding real footage of your product or location, or timing something to match music. Synthesia isn’t built for that kind of editing, and pushing it there usually means exporting the video and finishing the job in a separate editor anyway.

Pricing (as of this writing)

The credit system is the thing to understand before you buy. Video minutes, AI dubbing minutes, and «AI-generated assets» are all drawn from the same monthly credit pool, and they don’t convert evenly — a minute of new video costs more credits than a minute of dubbing an existing one. If your plan is to localize one training video into six languages, that’s a very different credit cost than producing six unique short videos, even though both might sound like «six minutes of video» on paper. Read the actual credit breakdown for your use case before assuming a plan covers what you think it covers.

What’s genuinely good about it

• Speed for repeatable content. A product explainer or onboarding video that would take a day to shoot and edit traditionally can be produced in under an hour, including revisions — because revising means editing text, not reshooting.
• Multilingual reach without hiring translators or voice actors. If you sell into multiple language markets, generating a localized version of a training or explainer video is close to free additional effort once the English version exists.
• Consistency. Every video uses the same avatar, pacing, and tone, which matters for training content where you want every employee to see the same delivery.
• No production dependencies. No booking a videographer, no waiting on a presenter’s schedule, no reshoots because someone mispronounced a product name.

What’s genuinely limiting about it

• It looks like an AI avatar. Even the better avatars have a slightly flat delivery — good enough for internal training, noticeably synthetic for anything meant to build a personal, trustworthy connection with a customer.
• No real b-roll or camera work. You’re not getting establishing shots, product close-ups, or genuine customer footage. Synthesia videos are a person (or an avatar of one) talking to camera with slides behind them — useful for explaining something, not for showing off a physical product or a real workspace.
• The credit system can bite you. Between free, Starter, and Creator, the usable video minutes per month are genuinely small (10, 10, and 30 minutes respectively) for a business planning to produce video regularly.
• Custom avatars take setup time. The consent-recording requirement is reasonable, but it means you can’t just upload a photo and go — someone has to record a verification script first.
• It’s the wrong tool for authentic, founder-led content. If your marketing relies on a real person building trust on camera — a founder, a coach, a consultant — an AI avatar reading a script works against you, not for you.

A realistic example

Picture a small B2B software company with a five-step onboarding flow that changes every time they ship a new feature. Recording a real person walking through that flow means re-booking time with whoever’s on camera every time the product changes, then re-editing and re-uploading. With Synthesia, updating the video means editing the paragraph of the script that changed and re-rendering just that section — a job that takes minutes instead of a half-day shoot. That’s the scenario where the subscription pays for itself. Compare that to a boutique retail brand wanting a video ad that feels personal and handmade for social media: an AI avatar reading a script is more likely to undercut that feeling than support it, no matter how good the avatar looks.

Who it’s actually worth it for

A small business with recurring script-driven video needs — onboarding new hires, training staff on a process, walking customers through how to use a product, or maintaining a multilingual knowledge base — gets real value from Synthesia. The Starter or Creator plan replaces what would otherwise be a recurring cost of hiring a videographer or presenter for content that needs to be updated regularly. If your product changes often enough that your explainer video needs updating every quarter, being able to edit a script instead of reshooting is worth the subscription on its own.

Who should skip it

A small business whose marketing depends on personality — a founder who’s the face of the brand, testimonial-style content, social ads meant to feel authentic rather than produced — is better off with a phone camera and a real person than an AI avatar, even a well-made one. The same goes for anyone expecting Synthesia to replace general marketing video production: it doesn’t shoot products, locations, or real customers, and trying to force that kind of content through an avatar-and-slides format usually looks exactly like what it is.