Comparator
HeyGen vs Kling AI vs Runway vs Synthesia: Complete Comparison 2026
Select a category, then compare up to 3 tools side by side. Analyze features, pricing, and performance.
Video63%Comparable19 tools available
Create videos with AI avatars and voice cloning
HeyGen is an AI-powered video creation platform that generates professional videos with realistic avatars and voice cloning. Ideal for marketing, training, and corporate communication, it transforms simple text into engaging video in minutes.
Strengths
- Extremely realistic AI avatars with natural expressions
- High-quality voice cloning preserving nuances
- Automatic translation in 40+ languages with lip-sync
- Custom avatar creation from your own image
Limitations
- Very limited free plan (3 videos/month with watermark)
- Expensive additional generative credits
- Some avatars may look artificial in certain situations
- Variable rendering time depending on complexity
Pricing plans
- 3 vidéos par mois
- Export 720p
- Avatars publics
- Templates de base
- Watermark HeyGen
- Vidéos illimitées jusqu'à 30 min
- Export 1080p sans watermark
- Sous-titres intégrés
- 100+ avatars IA
- Clonage vocal
- Traitement standard
- Tout Creator inclus
- Espace multi-utilisateurs
- Rôles et permissions
- Gestion de marque
- Traitement prioritaire
- Édition et relecture traduction
- Commentaires sur vidéos
- Relecture traduction
- Sécurité enterprise-grade
- Support prioritaire
- Account manager dédié
- SSO
- Data center dédié
AI Video Generator by Kuaishou
Kling AI is an AI video generator developed by Kuaishou (China) capable of creating realistic videos up to 2 minutes in 1080p from text or images. With its advanced diffusion model, it rivals OpenAI's Sora.
Strengths
- Video generation up to 2 minutes in 1080p
- Excellent value for money with affordable plans
- Various modes: text-to-video, image-to-video, extension
- Motion brush for precise movement control
Limitations
- Interface only in English and Chinese
- Sometimes long generation times for HD videos
- Requires stable internet connection
- Learning curve for advanced features
Pricing plans
- 66 crédits quotidiens
- Vidéos avec filigrane
- Résolution 540p max
- Durée 5-10 secondes
- 660 crédits/mois
- Sans filigrane
- Résolution 1080p
- Durée illimitée
- Report crédits 20%
- 3000 crédits/mois
- Contrôles caméra avancés
- Mode professionnel
- Priorité génération
- Report crédits 20%
- 8000 crédits/mois
- Accès prioritaire nouveautés
- Support prioritaire
- Toutes fonctionnalités
- Report crédits 20%
Cinematic quality AI video generation with Gen-4
Leading AI video generation platform with Gen-4, text-to-video, image-to-video, and advanced control tools.
Strengths
- Exceptional video quality, cinematic level
- Gen-4 with photorealistic fidelity and natural movements
- Advanced controls: Motion Brush, Director Mode, keyframing
- Multi-modes: text-to-video, image-to-video, video-to-video
Limitations
- Base clips limited to 10 seconds (extendable)
- High price for intensive use
- Learning curve for optimal prompts
- Interface primarily in English
Pricing plans
- 125 crédits uniques
- Gen-4 Turbo image-to-video
- Gen-4 text-to-image
- 3 projets vidéo
- 5 GB stockage
- 625 crédits/mois
- Tous les outils génératifs
- Sans filigrane
- Upscaling
- 100 GB stockage
- Projets illimités
- 5 utilisateurs max
- 2250 crédits/mois
- Création voix personnalisée
- Export ProRes
- 500 GB stockage
- 10 utilisateurs max
- Support prioritaire
- 2250 crédits/mois + Explore Mode
- Générations illimitées en mode relaxé
- Toutes fonctionnalités Pro
- 10 utilisateurs max
- Crédits personnalisés
- SSO
- Sécurité avancée
- Support prioritaire
- Analytics workspace
Create professional videos with AI avatars in minutes
Synthesia is the leading AI video generation platform. It enables creating professional videos with realistic AI avatars, without cameras or studios. Perfect for training, marketing, and internal communications, Synthesia transforms simple text into multilingual videos in just a few clicks. Over 60,000 companies, including 90% of the Fortune 100, use Synthesia to create video content at scale while reducing production costs by up to 80%.
Strengths
- Ultra-realistic AI avatars with perfect lip sync
- 140+ languages and accents available
- Intuitive interface, 90% of users publish without tutorial
- One-click automatic translation to 80+ languages
Limitations
- Avatars sometimes stiff, limited facial expressions
- Video credits limited by plan
- Custom avatars expensive ($1,000/year add-on)
- Less suited for creative consumer content
Pricing plans
- 1 éditeur
- 9 avatars IA
- 3 minutes de vidéo/mois
- Voix IA en 140+ langues
- Templates de base
- 1 éditeur + 3 invités
- +125 avatars Synthesia
- Téléchargement des vidéos
- Assistant vidéo
- Doublage IA (120 min/an)
- Suppression du logo Synthesia
- Support chat/email
- 1 éditeur + 5 invités
- 5 avatars personnels
- +180 avatars Synthesia
- Doublage IA (360 min/an)
- Pages vidéo personnalisables
- Accès API
- Plusieurs avatars par scène
- Vidéos interactives
- Support prioritaire
- Minutes illimitées
- Traduction 1-clic en 80+ langues
- +230 avatars libres de droits
- Avatars personnels illimités
- SAML/SSO
- Collaboration temps réel
- Kits de marque
- Export SCORM
- Doublage IA (extension)
- Intégration sur mesure
- Services de déploiement
- CSM dédié
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