Synthesia vs Synthesys: Two Tools, One Confusing Name
People search this because the names look like a typo. They are not. Synthesia (synthesia.io) is the enterprise AI-avatar platform. Synthesys (synthesys.io) is a separate voice + avatar + generative-video studio. Same rubric, live vendor pricing from August 2026, and a clear pick for each job.
“Synthesia vs Synthesys” is not a feature bake-off between two versions of the same product. It is a spelling collision. Synthesia is the tool corporate teams mean when they say “AI avatars”: a presenter talks to camera, you edit the script, you re-render, and (on the right plan) you localize. Synthesys is a different company selling a different bet — put voice, avatars, images, and frontier text-to-video models on one credit balance so a solo creator does not stack four subscriptions. If you landed here from a search, the next two cards are the whole answer; the scorecard is for anyone still deciding.
Synthesia
Presenter video for training, explainers, and localization. Stable stock avatars, personal avatars on paid plans, 160+ languages, and the enterprise controls (SSO, SCORM, brand kits) teams actually ask for. Not a cinema tool, and not a voice studio.
Synthesys
Voice, avatar video, generative clips, and images on one bill, with cloning slots and stated full commercial rights on every paid tier. The pick when you wanted “an AI avatar tool” and also need the voiceover and the ad variations.
Both buttons are affiliate links — we may earn a commission at no extra cost to you. Full disclosure below.
The standardized scorecard
Highlighted cell marks the leader on that criterion — not a verdict that one product “wins.” Pricing and specs reflect each vendor's live pricing page as of August 2026; qualitative calls synthesize how each product is used.
| Criterion | Synthesia | Synthesys |
|---|---|---|
| Company / domain | Synthesia — synthesia.io (unrelated to Synthesys) | Synthesys — synthesys.io (unrelated to Synthesia) |
| Core product | Enterprise presenter-avatar platform — script to talking-head video | Bundled studio / “AI video agent” — voice + avatars + generative video + images |
| Who it is built for | L&D, corporate comms, and marketing teams that need governed presenter video | Solo creators, UGC advertisers, and small teams who want one bill for voice + video |
| Stock avatars | 125+ Starter / 180+ Creator / 240+ Enterprise (pricing page) | 200 stock video avatars on every published plan |
| Custom / personal avatars | Personal avatars on paid plans; Studio Express-1 is a $1,000/yr add-on | Digital twins: 5 Indie / 15 Studio / unlimited Agency |
| Voice & cloning | 160+ languages & voices; voice cloning paired with a custom avatar | Cloning slots on every paid tier (10 → 25 → unlimited); 50 chars = 1 credit |
| Beyond talking-head video | AI dubbing, 1-click translation (Enterprise), interactive video, SCORM, brand kits | Text-to-video via frontier models (Veo, Sora, Kling, Wan), UGC ads, AI images |
| Free tier | Basic $0/mo — 9 avatars, 10 min video/mo; downloads start on Starter | None on the published pricing page |
| Cheapest paid plan | Starter $29/mo, or $18/mo billed yearly ($264/yr) | Indie $29/mo, or $20/mo billed yearly ($240/yr) |
| How usage is metered | Shared credits + video minutes (10 min/mo Starter; 30 min/mo Creator) | Video credits (1,000 / 2,500 / 5,400) covering the whole suite |
| API | Self-serve on Creator; Enterprise adds volume and SSO | Sales-gated; no public rate card |
| Enterprise / compliance | SSO/SAML, SCORM, brand kits, live collab, dedicated CSM on Enterprise | Custom contracts & SLA on Enterprise |
| Commercial rights | Subscription output; confirm current terms for paid-media / client use | Full commercial rights stated on every paid plan — no royalties or attribution |
| Best for | Training libraries, explainers, and multi-language corporate localization | Faceless channels, UGC ads, and one-subscription voice + avatar + video |
They are not the same company
This is the only fact that matters if you are about to enter a card number. Synthesia Ltd operates synthesia.io. Synthesys operates synthesys.io. There is no shared parent, no shared login, and no plan you can transfer. The products overlap in one place — a script can become a person talking to camera — and then they diverge. Treat a Google result that uses the names interchangeably as a bad result. The working YouTube explainer path is How to make an AI avatar video.
We review both independently. Signup links to Synthesia and Synthesys are affiliate links, disclosed on those pages and again here. The scorecard below is the same rubric either way.
What each product actually is
Synthesia — a presenter-video system
Synthesia's job is a talking-head deliverable you can govern. You write a script, pick a stock or personal avatar, generate, then edit the script and re-render instead of re-booking a studio. The 2026 pricing page puts that on a credit-plus-minutes meter: Starter is 10 minutes of video or AI dubbing a month (1,200 credits); Creator is 30 minutes (3,600 credits) and adds API access, five personal avatars, and interactive video. Enterprise is where 1-click translation into 80+ languages, SCORM export, SAML/SSO, brand kits, and a dedicated CSM live. Languages and voices are published as 160+ on every tier. Stock avatars scale 125+ → 180+ → 240+ by plan.
That is a corporate instrument. It is excellent at the job and the wrong buy if you wanted cinematic generative video, a voice-cloning workbench, or fifty UGC ad variations by Friday. Full breakdown in our Synthesia review.
Synthesys — a bundled generative studio
Synthesys has been repositioning as an “AI video agent”: one interface that routes a prompt, URL, or script through frontier models (its homepage lists Sora 2, Google Veo 3.1, Wan, Kling, Seedance) and also keeps the older studio pieces — Voices, Humatar / digital-twin avatars, dubbing, and image generation — on the same credit balance. Every published plan includes commercial rights with no royalties or attribution. Indie starts at 1,000 video credits, 10 voice-clone slots, and 5 digital twins. Agency ($119/month, or $83/month billed yearly on the live grid) unlocks 4K, unlimited cloning, and unlimited twins.
The trade is the opposite of Synthesia's: breadth and self-serve creator pricing instead of enterprise governance. Voice realism still trails a specialist like ElevenLabs. Avatar polish trails Synthesia on a presenter close-up. The reason to pay is that those three jobs share one invoice. Full breakdown in our Synthesys review.
Avatars: polish vs inventory
On a head-and-shoulders presenter, Synthesia is the safer professional default — that is the consistent read across its own positioning and the way teams actually use it. Blink cadence, micro head-tilt, and English / major-European mouth-sync are the product. The format stays locked to presenters: hand gestures loop, full-body action is not the point, and emotional range is narrow. Personal avatars exist on paid plans; a Studio Express-1 avatar is listed as a $1,000/year add-on for annual customers and can take up to ten days.
Synthesys publishes 200 stock video avatars on every plan and sells digital twins as a first-class slot (5 / 15 / unlimited). It also leans on UGC-style personas and product-ad templates rather than a single “corporate presenter” look. If the output needs to survive a brand-and-legal review, Synthesia is the surer room. If the output is a TikTok-native product demo or a faceless-channel explainer, Synthesys is the one that was designed for that brief.
Voice, cloning, and everything that is not a talking head
This is where the products stop being comparable. Synthesia's voice layer exists to serve the avatar: 160+ languages and voices, voice cloning paired with a custom avatar, and AI dubbing metered from the same minute/credit pool (lip-sync dubbing uses 2× credits when enabled). It is not trying to be a voiceover studio.
Synthesys is. Its pricing table lists 1,000+ voices, 175+ languages and dialects, and cloning slots on every paid tier. Voice generation is metered at 50 characters per credit (50,000 / 125,000 / 270,000 characters a month on Indie / Studio / Agency). Then it adds the things Synthesia does not sell on a self-serve page: text-to-video through third-party frontier models, UGC ad templates, and image generation. Two caveats we already flag in the ElevenLabs vs Murf vs Synthesys comparison: Synthesys' own pages disagree on voice and language counts (400+/140+ on the homepage vs 1,000+/175+ on pricing), and the TTS API is sales-gated with no public rate card.
Pricing, verified August 2026
Both vendors put $29 on the monthly entry sticker. After that the meters are incompatible, and both sites have a promo-vs-list wrinkle you should read past the banner.
| Criterion | Synthesia | Synthesys |
|---|---|---|
| Free | Basic $0 — 9 avatars, 10 min video/mo, 1 editor | — |
| Entry paid | Starter $29/mo (1,200 credits, 10 min video or dubbing, 125+ avatars) or $18/mo yearly | Indie $29/mo or $20/mo yearly — 1,000 video credits, 10 clone slots, 5 digital twins |
| Mid tier | Creator $89/mo (3,600 credits, 30 min, 5 personal avatars, API) or $64/mo yearly | Studio $59/mo or $41/mo yearly — 2,500 credits, 25 clone slots, 15 digital twins |
| Upper self-serve | None — Enterprise (custom) is next | Agency $119/mo or $83/mo yearly — 5,400 credits, unlimited cloning/twins, 4K |
| Annual math | FAQ: Starter $264/yr, Creator $804/yr. Banner: plans now starting from $18/month | Displayed $20 / $41 / $83. FAQ claims ~40% off and Indie ~$17/mo — pages disagree |
| What the meter actually is | Credits are now a shared pool for video, dubbing, and other AI features; unused minutes do not roll over | One credit pool for the suite. Frontier models (Sora 2, Seedance) burn credits far faster than standard ones |
Synthesia (synthesia.io/pricing, August 2026): a “New lower prices — plans now starting from $18/month” banner. Monthly grid is Starter $29 and Creator $89; yearly grid is Starter $18/month and Creator $64/month. The FAQ on the same page states Starter at $264/year and Creator at $804/year, which matches those yearly rates. Basic is $0 with 9 avatars and 10 minutes a month; the Starter card is explicit that downloads and logo removal are paid-plan features. Unused video minutes do not roll over. Credits are now a shared currency across video, dubbing, and other AI features.
Synthesys (synthesys.io/pricing, August 2026): Indie $29 / Studio $59 / Agency $119 monthly, displaying $20 / $41 / $83 on the yearly toggle ($240 / $492 / $996 billed annually). The page header says “Yearly −30% savings.” The FAQ on the same page says annual billing saves 40% and quotes Indie at “approximately $17/mo.” We are reporting the numbers the pricing grid actually shows, and flagging that the FAQ does not match. There is no free plan on that page. Frontier-model rows on the credit calculator (Sora 2 at 975 credits per 15s; Seedance 2.0 at 1,950) are why a plan that looks generous can empty in a handful of renders.
Strengths and weaknesses
Synthesia
- Strengths: the default professional presenter avatar; 160+ languages published consistently; a real free Basic plan; self-serve API on Creator; SSO, SCORM, brand kits, and 1-click translation on Enterprise; script-edit-to-re-render loop that replaces studio re-shoots.
- Weaknesses: locked to presenter framing; narrow performance range; no bundled voice-studio or generative-video suite; 10 minutes a month on Starter is tight; unused minutes do not roll over; pricing only pays back at team volume.
Synthesys
- Strengths: voice + avatars + generative video + images on one subscription; cloning slots and digital twins on the entry plan; stated full commercial rights on every paid tier; 4K and unlimited cloning at Agency; no long-term contract.
- Weaknesses: sales-gated API; video-credit metering plus expensive frontier-model rows; its own pages disagree on voice/language counts and on the annual discount; a much smaller public review footprint than Synthesia; not the category leader on raw avatar polish or raw voice realism.
Which one should you pick?
Choose Synthesia if…
- The deliverable is a presenter talking to camera for training, an explainer, or internal comms.
- You need localization, an LMS/SCORM package, SSO, or a brand kit — not just “an avatar.”
- A legal or brand team will review the output and you want the more conservative, presenter-locked tool.
- You want to try before paying: start on Basic, then Starter if you need downloads.
Choose Synthesys if…
- You want avatar video and voiceover and generative clips on one bill.
- The job is UGC-style ads, faceless-channel content, or product videos, not a governed training library.
- Cloning slots and stated full commercial rights on an entry-level plan matter more than SSO.
- You will start monthly, watch the credit drain on frontier models, and only then consider annual.