Dubly.AI vs Synthesia
Dubly.AI and Synthesia are often compared, but they solve fundamentally different problems. Dubly.AI is a video dubbing & translation platform built for business video translation. Synthesia focuses on ai avatar video generation (dubbing is a secondary feature), making it a better fit for enterprise l&d and training videos. This comparison uses documented facts to show where each one excels and where it falls short.
- Dubly.AI Languages
- 40+
- Synthesia Languages
- 70+ (140+ Enterprise)
- Dubly.AI Lip Sync
- 96.4 / 100·Excellenti
- Synthesia Lip Sync
- 68.3 / 100·Goodi
The Key Difference
Synthesia is an avatar-first platform that added video translation as a secondary feature. Dubly.AI is purpose-built for dubbing real footage. This architectural difference shows up everywhere: Dubly.AI's lip sync is optimized for real human faces and natural speech patterns, while Synthesia's lip sync engine was designed for synthetic avatars and can struggle with occlusions, rapid movement, and complex real-world footage.
Feature Comparison
When comparing features, pay attention to more than just checkboxes. Dubly.AI supports 40+ languages and Synthesia offers 70+ (140+ Enterprise) — but raw language count is less important than quality in your target languages. Look at lip sync ratings, multi-speaker handling, and whether the platform produces finished video or just audio tracks.
| Feature | Dubly.AI | Synthesia |
|---|---|---|
| Primary Focus | Video dubbing & translation | AI avatar video generation (dubbing is a secondary feature) |
| Languages | 40+ | 70+ (140+ Enterprise) |
| Lip Sync | 96.4 / 100·Excellenti | 68.3 / 100·Goodi |
| Voice Cloning | ✓ Yes | ✓ Yes |
| Video Output | ✓ Yes | ✓ Yes |
| Avatar Creation | ✗ No | ✓ Yes |
| API Access | ✓ Yes | ✓ Yes |
| Multi-Speaker | Auto detection | Auto detection |
| Custom Vocabulary | ✓ Yes | ✗ No |
| Unlimited Revisions | ✓ Yes | ✓ Yes |
Pricing
Pricing in the AI dubbing space is notoriously hard to compare apples-to-apples. Dubly.AI uses a credit-based (one credit per dubbed minute, two with lip sync) model starting at €89/month, while Synthesia charges via credits per second (lip sync doubles) starting at €26/month. The real cost depends on your volume, whether you need lip sync (which often costs extra), and how many team members need access.
| Detail | Dubly.AI | Synthesia |
|---|---|---|
| Starting Price | €89/month | €26/month |
| Pricing Model | Credit-based (one credit per dubbed minute, two with lip sync) | Credits per second (lip sync doubles) |
| Free plan | ✗ No | ✓ Yes |
| Enterprise Plans | ✓ Yes | ✓ Yes |
Data Privacy & Compliance
Both platforms process data on EU servers — Dubly.AI in Germany (EU), Synthesia in Ireland (EU) — but the details differ. Look at whether a Data Processing Agreement is available and, crucially, whether the provider trains its AI models on your content. For regulated industries and European businesses, these distinctions can be deal-breakers.
| Requirement | Dubly.AI | Synthesia |
|---|---|---|
| Server Location | Germany (EU) | Ireland (EU) |
| DPA Available | ✓ Yes | ✓ Yes |
| No AI Training | ✓ Yes | ✗ No |
Strengths & Weaknesses
Dubly.AI
Strengths
- ✓ Highest score in the independent lip-sync benchmark: 96.4 / 100 (Sept 2026, 1,000 videos, five blind raters per video)
- ✓ Servers in Germany, no AI training on customer data, DPA available on every plan
- ✓ Built-in review workflow: invite external native-speaker reviewers at no seat cost, edit every segment before synthesis, unlimited revisions
- ✓ Glossary holds your terminology across all target languages
Weaknesses
- ✗ No free plan — the trial covers one short video
- ✗ Lip sync is an optional add-on that doubles credit usage (25 credits = 12 minutes with lip sync)
- ✗ UI less polished than some competitors
Synthesia
Strengths
- ✓ Realistic AI avatars (Express-2 engine)
- ✓ Customer data stored in Ireland on every plan
- ✓ Self-serve pre-signed DPA, named DPO, EU GDPR representative; SOC 2 Type II, ISO 27001, ISO 42001
- ✓ Free Basic plan: 1,200 credits, about 10 dubbed minutes, watermarked
Weaknesses
- ✗ Avatars are the core product; real-footage dubbing is a secondary feature
- ✗ Lip sync doubles credit cost: 240 vs 120 credits per dubbed minute
- ✗ Creator (€79) caps at 30 dubbed minutes a month — everything above is an Enterprise quote
Frequently Asked Questions
Is Dubly.AI better than Synthesia?
It depends on your use case. Our pick for business video translation, training and e-learning and 7 more use cases: Dubly.AI. Synthesia is not our first pick in any use case, but runner-up for training and e-learning, GDPR and EU data residency and 2 more use cases. This comparison breaks down the differences across lip sync quality, pricing, features, and data privacy.
How much does Dubly.AI cost compared to Synthesia?
Dubly.AI starts at €89/month (Credit-based (one credit per dubbed minute, two with lip sync)). Synthesia starts at €26/month (Credits per second (lip sync doubles)). Both offer different pricing models, so the actual cost depends on your usage volume.
Which tool has better lip sync quality?
Dubly.AI scores 96.4 / 100 · Excellent in the independent lip-sync benchmark (September 2026), Synthesia 68.3 / 100 · Good.
Read Full Reviews
Dive deeper into each platform with our individual reviews.
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Sources & Further Reading
- Dubly.AI Official Website — Dubly.AI, 2026
- Synthesia Official Website — Synthesia, 2026
- AI Video Translation Market Report — Market.us, October 2025