“Text-to-video” is three products. Runway is a generative video/image studio. HeyGen is a creator avatar studio. Synthesia is an L&D avatar studio sold as credit packs.
Checked 2026-10-19 on each public pricing page.
Verdict
| Output you actually need | Pick | Public card |
|---|---|---|
| A generative clip or edit from a prompt / still | Runway | Free 125 credits once. Standard $12/month billed annually (monthly $15). Pro $28 annual / $35 monthly. Max $76 annual / $95 monthly. No rollover on the Pro card we copied. |
| A talking avatar for a creator / social script | HeyGen | Free exists. Creator $29/month ($24 annual). Pro $49. Business $149 + $20/seat. Pro FAQ: credit tiers from 1,000 credits/mo at $49 up to 100,000 at $4,300. |
| Training / internal comms with an avatar, no camera crew | Synthesia | Credit packs, not Starter $29. Monthly examples: 6,000 credits $89; 12,000 $176. Annual rows from $64/mo-equivalent. Learner seats $87/mo. Express-1 avatar add-on $1,000/year. |
Open HeyGen vs Runway and HeyGen vs Synthesia. Runway vs Synthesia is the other pair.
Stale prices we refuse to repeat
- Runway “125 credits/month”, “Standard $15 / Pro $35” as the only cards — those were older monthly lists. Yearly Standard is $12 on the page we fetched.
- Synthesia “Starter $29 / Creator $89”. Not on the live page. Credits + optional seats + avatar add-on are three meters.
- Treating HeyGen and Synthesia as the same SKU because both say “avatar.”
Nearby tools (not substitutes)
- Pika — another generative clip tool. Use it as a control against Runway, not as an L&D studio.
- ElevenLabs — speech. Free 10k credits; Starter $6. Credits are not minutes. Add it when the job is voice, not a canvas.
Best for / not for
Best for: a buyer who can name the output (clip, creator avatar, training video) before opening a pricing page.
Not for: someone hunting one cheap “AI video” seat that does model clips and L&D avatars and a podcast voice.
How to buy without stacking three meters
- Generate one 5-second test on Runway Free if the idea is a moving picture.
- Generate one avatar take on HeyGen Free if the idea is a person talking to camera.
- If the buyer is L&D with a learner roster, price Synthesia packs + seats, not a $29 memory.
- Pay the one that produced a usable draft. Do not keep two video subscriptions “for options.”