Full side-by-side comparison of commission, cookie, recurring window, earning potential, and audience fit. Plus our creative verdict on which program is the better affiliate bet.
AI Avatars & Studio Video
AI Avatars, Translation & Cloning
After running the numbers across commission rate, recurring duration, cookie window, and audience conversion probability, the picture is nuanced — and the "obvious" winner isn't actually the better affiliate bet for everyone.
The headline: HeyGen pays 40% more per sale (35% vs 25%) for the first 3 months. If you drive a high volume of referrals and your audience converts quickly, HeyGen is the mathematically superior choice. A single $50/mo plan referral earns you $17.50/month × 3 = $52.50 total from HeyGen versus $12.50/month × 12 = $150 total from Synthesia on the same referral.
But that math flips when you look at it from the annual value per referral perspective. Synthesia's 12-month recurring window means each paying customer you refer generates 12 months of commission — not just 3. At a $50/mo average plan, Synthesia earns you $150/year per customer vs HeyGen's $52.50. That's nearly 3× the annual value per referral on Synthesia.
The cookie window is the second critical variable. Synthesia's 60-day cookie gives your audience twice as long to decide. In practice, B2B buyers for enterprise video tools rarely convert on first click — they research for weeks. A 30-day HeyGen cookie means you lose credit if the prospect signs up 31 days after clicking your link. Synthesia's 60-day window captures the full consideration cycle for this category.
You have a high-traffic creator or indie audience. You drive volume over depth. You can promote the lower-priced Creator plan ($15/mo starter) where volume matters. You're comfortable with the 3-month window and can reinvest quickly.
You target enterprise, L&D, or corporate training buyers. You have a B2B audience that takes 30–60 days to convert. You value compounding recurring revenue over a spike. You're building a long-term affiliate portfolio.
How much you'd earn per referral over 12 months — calculated on a $50/mo average plan price.
| Metric | Synthesia (25% × 12 mo) | HeyGen (35% × 3 mo) | Difference |
|---|---|---|---|
| Commission per month | $12.50 | $17.50 | HeyGen +$5.00/mo |
| Total per referral (12 mo) | $150.00 | $52.50 | Synthesia +$97.50 |
| 10 referrals — annual total | $1,500 | $525 | Synthesia +$975 |
| 50 referrals — annual total | $7,500 | $2,625 | Synthesia +$4,875 |
| Cookie window advantage | 60 days ✓ | 30 days | Synthesia +30 days |
| Revenue sustainability | 12 mo recurring ✓ | 3 mo only | Synthesia +9 mo |
The same commission comparison means different things depending on who your audience is.
Synthesia is the natural fit. Enterprise buyers prefer enterprise brands. Synthesia's Fortune 100 customer list gives you social proof leverage. Target: HR managers, L&D directors.
HeyGen wins here. Creators recognize HeyGen's branding, use it for shorts and translations, and convert on lower-priced plans. Lower average order value, higher volume potential.
Synthesia's Studio and Enterprise tiers align with agency pricing. Agencies pay more, renew annually, and bring repeat customers. Better long-term revenue per referral.
Both tools used here — HeyGen for avatar video, Synthesia for professional course intros. Best strategy: link to both and let audience self-select. Double commission opportunity.