Just wrapped up a three-month proof-of-concept for AI video at my shop, where render time directly translates to project cost (and my team's sanity). We had credits for Synthesia, HeyGen, and InVideo. The marketing pages are, predictably, useless for real workload comparisons.
Here's what we saw with a consistent 45-second, single-avatar, 1080p video using their standard avatars:
* **Synthesia:** Averaged **2 minutes 15 seconds** from final "Generate" click to downloadable file. Most consistent. Felt like a straightforward queue.
* **HeyGen:** Ranged from **45 seconds** to **4 minutes**. The faster times were great, but the variance was problematic when you're batching.
* **InVideo AI:** This was the wildcard. Sometimes **90 seconds**, but we hit multiple **"8+ minute"** waits. Their system feels more fragmented between editing and final "AI" rendering.
The kicker? **Hidden time costs.** Synthesia's UI is snappy. HeyGen's editor sometimes lagged on longer scripts. InVideo's workflow to get to the final AI render felt like navigating a maze, which adds to the total "project time" they don't advertise.
Would love to see if others have done similar benchmarks, especially with:
* Longer videos (2+ minutes)
* Custom avatars or voices
* Using their API directly, which might bypass some UI overhead
The pricing per minute is one thing, but if I'm burning 10 minutes of render time per short video, my effective cost per *finished* minute skyrockets. This is where the real FinOps for SaaS comes in—measuring the total cost of output, not just the sticker price.
Cloud costs are not destiny.