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 enterprise 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. We tested both platforms to break down where each one excels and where it falls short.
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 32+ languages and Synthesia offers 130+ — 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 | 32+ | 130+ |
| Lip Sync | Yes (Excellent) | Yes (Good) |
| 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 model starting at €79/month, while Synthesia charges via credit-based tiers starting at $18/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 | €79/month | $18/month |
| Pricing Model | Credit-based | Credit-based tiers |
| Free Tier | ✗ No | ✓ Yes |
| Enterprise Plans | ✓ Yes | ✓ Yes |
Data Privacy & Compliance
Both platforms process data on EU servers, but the details differ. Look at the specific server location, 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) | EU (AWS Ireland/Frankfurt) |
| DPA Available | ✓ Yes | ✓ Yes |
| No AI Training | ✓ Yes | ✗ No |
Strengths & Weaknesses
Dubly.AI
Strengths
- ✓ Highest lip sync quality we tested — results look native even on difficult footage
- ✓ Full GDPR compliance with German servers
- ✓ Custom vocabulary and brand voice controls
- ✓ Unlimited revisions on all plans
Weaknesses
- ✗ No free tier — free trial only (1 minute)
- ✗ Lip sync is an optional add-on that doubles minute usage
- ✗ UI less polished than some competitors
Synthesia
Strengths
- ✓ Industry-leading AI avatar quality with Express-2 engine
- ✓ 130+ dubbing languages and 160+ avatar voiceover languages
- ✓ Enterprise-grade security: SOC 2 Type II, ISO 27001, GDPR with EU data residency
- ✓ Supports dubbing uploaded real footage (up to 4K, up to 2.5 hours) with lip sync
Weaknesses
- ✗ Primary focus is AI avatars, NOT real-footage dubbing — dubbing is a secondary add-on
- ✗ Lip sync on dubbing costs 2x credits, making it expensive at scale
- ✗ Lip sync for dubbing available from Starter ($18/mo annual, $89/mo monthly) — but costs 2x credits
Frequently Asked Questions
Is Dubly.AI better than Synthesia?
It depends on your use case. Dubly.AI is best for enterprise video translation, while Synthesia excels at enterprise l&d and training videos. 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 €79/month (Credit-based). Synthesia starts at $18/month (Credit-based tiers). Both offer different pricing models, so the actual cost depends on your usage volume.
Which tool has better lip sync quality?
Dubly.AI is rated Excellent versus Synthesia's Good in our testing.
Read Full Reviews
Dive deeper into each platform with our individual reviews.
Continue Reading
Sources & Further Reading
- Dubly.AI Official Website — Dubly.AI, 2026
- Synthesia Official Website — Synthesia, 2026
- AI Video Translation Market Report — Market.us, October 2025