Prices in GBP. Verified monthly. Always check the provider's site for the latest.
Pros & cons
HeyGen
Pros
+SOC 2 Type II certified with a dedicated Data Protection Officer
+175 languages with AI lip-sync — broadest language support in category
+Free tier includes 3 videos and a custom digital twin
+API access from Creator tier for workflow automation
Cons
−Uses user content to train models by default — opt-out required
−Credit costs for Avatar IV/V are 20× higher than Avatar III
−Business tier at £117/mo is expensive for smaller teams
Kling AI
Pros
+Wide creative tooling: text-to-video, image-to-video, AI avatars, lip-sync, and motion control
+Developer API available with per-second pricing for video generation (klingai.com/dev)
+Kling 3.0 supports up to 4K resolution and native audio generation
+International-facing platform with English-language interface
Cons
−Consumer subscription pricing not verifiable from official English-language pages
−GDPR, SOC2, and ISO 27001 compliance not confirmed from official sources
−Data residency and training practices not publicly documented in accessible pages
Our take— HeyGen wins
Based on our comparison of published pricing, features, and compliance data, HeyGen scores 8.0/10 to Kling AI's 7.0/10. HeyGen pulls ahead with GDPR compliance and SOC 2 certification. Kling AI counters with a no-training-on-your-data policy. Pick HeyGen if GDPR compliance matters; pick Kling AI if a no-training-on-your-data policy matters.