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AI Tools Reviews
HeyGen vs Synthesia: I Made the Same Avatar Video in Both
I ran the exact same script through HeyGen and Synthesia to see which AI avatar platform actually delivers for creators who need results fast.
Same Script. Two Platforms. Very Different Results.
I copied a 90-second product explainer script — word for word — into both HeyGen and Synthesia on the same afternoon. Same voice tone goal, same avatar style request, same use case: a training video for a SaaS onboarding flow. What came back surprised me in ways I didn't expect.
Both platforms are genuinely good. But they're good at different things. And if you pick the wrong one for your workflow, you'll feel it in your output quality, your budget, and your patience.
The Setup: What I Was Testing
The script was 220 words. Conversational tone. One speaker. No B-roll needed — just a clean avatar delivering the message clearly.
I used HeyGen's Creator plan at $29/month and Synthesia's Starter plan at $29/month. Conveniently, they're priced identically at the entry tier, which made the comparison cleaner. I generated one video on each platform without touching advanced settings first, then a second pass with customizations applied.
Here's how they stacked up across the things that actually matter:
| Feature | HeyGen | Synthesia |
|---|---|---|
| Starting price | $29/month | $29/month |
| Stock avatars available | 100+ | 230+ |
| Custom avatar (your face) | Yes, from 2-min video | Yes, requires approval process |
| Lip sync quality | Excellent | Very good |
| Languages supported | 40+ | 140+ |
| Video translation | Yes (standout feature) | Limited |
| Template library | Moderate | Extensive |
| Learning curve | Low | Very low |
Where HeyGen Pulled Ahead
Lip sync. That's where HeyGen won, clearly.
When the avatar spoke, the mouth movement felt natural in a way that's hard to articulate until you've seen both side by side. Synthesia was good — not robotic, not embarrassing — but HeyGen's rendering had that extra layer of believability that matters when you're trying to build trust with an audience who doesn't know AI made the video.
HeyGen's video translation feature also deserves its own mention. I ran my English script through their translate-and-dub tool into Spanish. The avatar's mouth resynced to the new audio. The result wasn't perfect, but it was genuinely usable — something I'd actually send to a client. For anyone selling to a multilingual audience, this alone could justify the subscription.
Pro tip: If you're creating a custom avatar in HeyGen, record yourself in a well-lit room speaking naturally for 2 minutes. The more expressive your source footage, the more lifelike your avatar becomes. Flat delivery in = flat avatar out.
Where Synthesia Pulled Ahead
Templates and polish. Synthesia's built-in slide-style layouts made my explainer look like it had a designer's touch with zero extra effort. The platform felt built for corporate and L&D teams — structured, professional, reliable.
The avatar library is also bigger. With 230+ stock presenters covering a wide range of ages, ethnicities, and presentation styles, Synthesia gives you more options before you even touch a custom avatar. For agencies or operators building videos at volume for different clients, that diversity matters.
Synthesia also felt slightly faster to produce a first draft. The interface guides you through the process in a way that almost removes the need for a tutorial. If you're handing this tool to a non-technical team member, Synthesia is the easier handoff.
Pro tip: Synthesia's template library is genuinely underused. Before building from scratch, filter templates by your industry — there are solid starting points for SaaS, HR, healthcare, and sales training that cut production time in half.
Who Should Use Which
This isn't a "one wins overall" situation. It depends on what you're building.
Pick HeyGen if you need realistic lip sync, plan to use your own face as an avatar, or need video translation into multiple languages. It's the better tool for creators who want their AI video to feel human.
Pick Synthesia if you're producing training content at scale, need a large stock avatar library, or want a tool your whole team can use without a learning curve. It's the better tool for operators who need consistency and volume.
For freelancers selling video services to clients? HeyGen's output quality is easier to charge a premium for. For internal company use? Synthesia runs smoother as an operational tool.
FAQ
Can I use my own face as an avatar on both platforms?
Yes. HeyGen creates a custom avatar from a short 2-minute recording and processes it quickly. Synthesia requires submitting a longer consent video and going through a manual approval process that can take a few days.
Is $29/month enough for real business use?
It depends on volume. Both Starter/Creator plans cap your monthly video minutes. If you're producing more than 3-4 videos per week, you'll likely need to step up to the next tier on either platform.
Which platform has better voice quality?
Both use high-quality AI voices. HeyGen supports voice cloning on higher-tier plans, which gives it an edge if you want the avatar to sound like you — not just look like you.
Do either of these work for social media content?
HeyGen handles vertical video and social formats better out of the box. Synthesia is more optimized for landscape/widescreen corporate or training content.
Bottom Line
If I had to pick just one, I'd use HeyGen for client-facing video work and Synthesia for internal team training. Both earn their $29/month price tag — they're just optimized for different outcomes. Test both with their free tiers before committing to either.
Check out more head-to-head AI tool breakdowns at AI Profit Automation.