Synthesia holds a $2.1 billion valuation following a $180 million Series D funding round. The company includes 60,000 customers, including 60% of Fortune 100 companies such as Amazon and Reuters. Its AI Playground provides access to Google’s Veo 3.1 and OpenAI’s Sora 2 for B-roll generation. While Synthesia focuses on corporate training, HeyGen supports 170,000 businesses with a focus on marketing and sales. The company was founded in 2017 by researchers from UCL, Cambridge, Stanford, and TUM.
Lip-sync precision and language depth
HeyGen’s Video Translate feature allows users to upload an original video, auto-translate the script, and generate a localized version that preserves the original speaker’s voice timbre while maintaining facial lip-sync accuracy within 0.02 seconds of movement. This precision distinguishes HeyGen for users needing multilingual social media content. HeyGen’s Avatar IV model provides higher realism for short-form content, and G2 users rate its avatar quality at 9.2/10. In a test involving an 800-word script, the lip-sync on Avatar IV held from the first sentence to the last, including a Mandarin translation section. Synthesia supports 140 to 160+ languages, whereas HeyGen supports 175+ languages and dialects. Which platform provides the better ROI for a small marketing agency?
Synthesia is the better choice for long-form production, as its Express-2 avatars provide more consistency for videos up to 2.5 hours. You should check these accuracy levels yourself if your brand relies on high-stakes sales videos. HeyGen is the stronger candidate for creators who need to scale personalized outreach or social clips.
Cost per minute and workflow fit
Synthesia’s Starter plan costs $18 per month with annual billing and includes 125 avatars and 120 video minutes per year. Users find Synthesia’s workflow better for L&D tasks because it includes 90+ clonable example videos and supports various aspect ratios like 1:1 and 5:4. However, Synthesia bars stock avatars from paid ads on every tier, which forces users toward expensive custom avatars. HeyGen’s Creator plan costs $24 per month with annual billing and includes 600 credits. Because Avatar IV rendering consumes 20 credits per minute, this plan provides approximately 30 minutes of footage, but heavy re-rendering reduces this to 21 to 24 minutes. HeyGen provides SCORM export on its $149 per month Business plan.
| Feature | HeyGen (Creator) | Synthesia (Starter) |
|---|---|---|
| Monthly Price | $24 (annual) | $18 (annual) |
| Video Minutes | ~21 to 24 mins | 10 mins |
| Languages | 175+ | 140 to 160+ |
| Avatars | 700+ | 125+ |
| Aspect Ratios | 16:9, 9:16 | 16:9, 9:16, 1:1, 4:5, 5:4 |
Synthesia is the more predictable option for training teams because it uses a minute-based system rather than a variable credit model. HeyGen’s pricing is more flexible for creators who produce short, frequent clips without heavy iteration. If your goal is to automate personalized sales outreach or social media, HeyGen is the logical choice. If your goal is to build a library of onboarding modules or compliance training, Synthesia is the correct tool.
