Synthesia Problems & Issues
Real user-reported problems, complaints, and limitations for Synthesia. Based on analysis of 15 signals.
Overall score: 58/100
Issues by Category
Every video requires human review - adds days
Every video generated on Synthesia requires human review before download, adding 1-2+ days to the process. This defeats the purpose of using AI for quick and efficient video production. Users expecting instant turnaround are frustrated by mandatory waiting periods.
Avatar quality and lip-sync issues
Avatar quality varies significantly, with facial features often not matching spoken words. Lip-sync accuracy is criticized across multiple platforms. Some avatars fall into the 'uncanny valley' - realistic enough to be unsettling but not enough to be natural. Expressions and gestures feel stiff.
Custom avatar creation rejected for minor issues
Users developing their own custom avatars face stringent rules that reject images for simple issues like brightness problems. The process is frustrating when legitimate business use cases are blocked by overly strict automated filters.
Robotic voices on longer narrations
Voices can still sound robotic on longer narrations or when nuanced emotion is needed. The text-to-speech quality struggles with complex emotional delivery. Shorter clips sound better than extended scripts.
Limited editor requires external tools
The built-in editor is intentionally simple, meaning limited timeline control, transitions, and audio mixing. Advanced edits require exporting and using external tools, fragmenting the workflow that was supposed to be all-in-one.
No control over avatar gestures and expressions
Users lack complete control over the gestures, expressions, and movements of virtual presenters. Avatars sometimes feel stiff, especially when expressive delivery is needed. The preset animations limit creative control.
Accounts banned within minutes of subscribing
Some users report having their accounts banned within 30 minutes of subscribing while creating legitimate promotional videos. This occurs without warning or clear explanation. Combined with the no-refund policy, users lose both access and money immediately.
Inconsistent and unpredictable content moderation
Content moderation is arbitrary and lacks transparency. Videos approved one day get flagged the next with nearly identical edits - changing an image or fixing pronunciation triggers rejection. Users left guessing what triggers moderation, creating frustration and wasted time. Healthcare, biotech, and medical users report being blocked entirely without explanation.
Customer support hides behind policy links
Customer support has been criticized for hiding behind policy links and warnings rather than offering real solutions. Users describe it as dealing with an automated system rather than a team that values paying customers. Technical issues and upgrade inquiries get slow responses.
No self-service account deletion
There is no self-service way to close or delete your account. Users must contact support and wait for them to process it. This creates unnecessary friction for users wanting to leave the platform.
Strict no-refund policy even for immediate issues
Despite using the platform for only two days, Synthesia refuses refunds citing their strict no-refund policy. Users requesting refunds within the stated 15-day consumer refund period report being refused. Support agents refuse to transfer to supervisors. Customers lose money without receiving working service.
Credits don't roll over month to month
Video credits expire monthly with no carryover. For consultants and teams with variable workloads, this creates waste during slow months. If credits could bank even for two months, it would fit better with how consultants actually work. The system isn't designed for fluctuating production schedules.
Enterprise pricing escalates with seats and workspaces
The platform is expensive for big teams, with costs escalating significantly when adding seats and workspaces. API access requires higher-cost plans. Enterprise contracts involve custom pricing that often surprises organizations after initial quotes.
Videos stuck at 99% or fail to render
Common technical issues include videos getting stuck during processing (especially at 99% completion) and failing to render entirely. Some users report 80% of videos getting stuck. Resolution issues cause videos to become blurry, requiring redo.
Render queues at peak times
Users experience occasional render queues during peak times, adding unexpected delays to video production. Cloud-based rendering means you're dependent on server availability, which can vary.
Regret Patterns
Common reasons users regret choosing Synthesia.
Account banned immediately after subscribing
Users report accounts banned within 30 minutes of payment while creating legitimate business videos. Combined with no-refund policy, they lose money and access simultaneously with no recourse.
Content moderation blocked legitimate business use
Healthcare, biotech, and medical companies discover after purchase that they cannot use stock avatars at all. Content moderation rules aren't clearly communicated upfront, leaving entire industries unable to use the service.
Human review delays killed the speed advantage
Users expecting instant AI-generated videos discover every video requires 1-2+ day human review. The speed advantage over traditional production disappears for time-sensitive projects.
Credits expired during slow production months
Consultants and project-based teams watch unused credits expire monthly. Variable workloads mean heavy months drain credits while light months waste them. No rollover creates artificial pressure.
Lip-sync and avatar quality disappointed
Users expecting realistic AI presenters find avatars fall into uncanny valley. Lip-sync doesn't match words, expressions feel stiff, and gestures are preset. The output looks 'AI-generated' rather than natural.
Refund refused despite immediate problems
Users who encounter moderation bans or quality issues immediately find refunds refused even within days of purchase. Support hides behind policy rather than helping. Money lost with nothing to show.
When Synthesia Breaks Down
Specific scenarios where Synthesia fails or underperforms.
Healthcare or medical content requirements
Synthesia's content moderation blocks healthcare, biotech, and medical industries from using stock avatars. This is a platform policy, not a bug. Entire organizations discover they cannot use the service for their primary use case.
Time-sensitive campaign deadlines
Mandatory human review adds 1-2+ days to every video. Marketing campaigns requiring quick iterations or last-minute changes become impossible. The AI speed advantage is negated by review bottleneck.
Variable production workloads
Credits expire monthly with no rollover. Consultants, agencies, and project-based teams waste credits during slow periods while running out during busy ones. The pricing model punishes irregular usage.
Need for expressive avatar performances
Limited control over gestures and expressions. Avatars feel stiff for content requiring emotional delivery. Marketing and storytelling content looks robotic. Users migrate to HeyGen for more natural output.
Enterprise team scaling
Per-seat costs escalate significantly when adding team members and workspaces. Enterprise custom pricing often surprises organizations after initial quotes. Budget planning becomes difficult.
Minor content edits trigger re-review
Videos approved initially get flagged after minor edits like changing an image or fixing pronunciation. The moderation system treats each version as new, requiring full re-review and adding days of delay.