HeyGen vs Synthesia: Which Is Better in 2026?

Realism is subjective, both vendors call their avatars the most realistic, and BestStacked doesn't run side-by-side tests. So this round compares what each vendor documents about its avatar products and plan limits (checked October 19, 2026). Watch sample videos from both with your own script, and disclose synthetic video appropriately.

• 01Stock avatars: HeyGen's pricing page lists 500+ stock video avatars on Free and 700+ on paid plans (its avatar page says 1,100+). Synthesia lists 9 on Basic, 125+ on Starter, 180+ on Pro and 240+ on Enterprise.
• 02Photo avatars and newest models: HeyGen's Avatar IV turns a single photo into a talking avatar (Free gets limited trial access; Creator and Pro allow Avatar IV videos up to 30 minutes), and HeyGen says Avatar V builds a digital twin from one short video that moves and gestures like you. Synthesia's Personal Avatars can be made from a single photo or a short video, and its Avatar Builder creates realistic or stylized avatars from a prompt.
• 03Custom avatars by plan: HeyGen includes 1 custom video avatar on Free, Creator and Pro, 5 on Business and 10+ on Enterprise, with more as an add-on; it says most digital twins are ready in 10 to 20 minutes and appear only with the person's verified permission. Synthesia includes 3 Personal Avatars on Starter, 5 on Pro and unlimited on Enterprise, each with a recorded consent statement; Studio Avatars are a paid add-on at $1,000 a year on every plan that offers them.
• 04Looks and motion: HeyGen's plan table lists up to 500 looks per custom video avatar plus motion and gesture control. Synthesia lets you change avatar outfits and backgrounds and prompt avatars to move and act in AI-generated scenes powered by Google's Veo 3.

Neither vendor publishes render times you can compare like for like, and BestStacked doesn't run speed tests, so this round is decided on what each help center documents about generation, edits and previews.

• 01Render time: HeyGen's help center estimates about 10 minutes of generation per minute of Avatar Studio video, often faster, and about 5 minutes per minute for Video Translation. It also says the regular weekday queue currently averages just under 24 hours, with higher tiers prioritized. Synthesia's help center gives no per-minute estimate: every video is moderated, manual review adds time, and longer videos take longer. Its API quickstart says processing takes 3 to 5 minutes but doesn't give a video length.
• 02Re-render cost: HeyGen says changes to images, layouts, captions or timing don't use credits on their own, while script, avatar or voice changes re-render the avatar scene and do. Synthesia charges only for the duration of new or replaced words, or the time a newly added avatar is on screen; removing words, reframing and pronunciation fixes cost nothing.
• 03Previews: HeyGen recommends previewing each scene before you render the final video. Synthesia previews a scene or the full video without using credits, but the avatar isn't animated in previews; rendering one avatar scene to check it (Scene Preview) is an Enterprise feature.
• 04Parallel jobs and devices: HeyGen documents how many videos each plan can process at once (Free 1, Creator and Pro 3, Business 6, Enterprise 20) and has a mobile app for creating and sharing video, with advanced edits on desktop. Synthesia is web-only.

Decided on each vendor's published language counts and plan limits, checked October 19, 2026.

• 01Language counts: Synthesia lists 140+ languages and voices on every plan, including the free Basic plan. HeyGen lists 175 languages and dialects on Creator and above (its avatar page says 177+) and 30+ on Free.
• 02Translating existing video: HeyGen's lip-synced video translation covers 175 languages and dialects from Creator ($24 a month billed yearly), and Pro adds editing and proofreading of the translated script. Synthesia's AI Dubbing covers 70+ languages on Basic, Starter and Pro and 140+ on Enterprise, and its 1-Click Translation into 140+ languages is listed under Enterprise.
• 03Voice cloning: both clone a voice from a sample with the speaker's permission. HeyGen allows 1 voice clone on Free and more on paid plans. Synthesia makes a voice clone through its own flow or with a Personal Avatar; its languages page says Personal Avatars speak 29 languages while its avatars page says over one hundred, so check the language you need.
• 04Viewer side: Synthesia's Multilingual Video Player plays each viewer's language automatically. HeyGen's plan table lists a brand glossary and a switch-voice option for translations.

• 01HeyGen Creator at $29/month ($24 billed yearly) gives 600 monthly credits, 1080p export and no watermark; how many minutes that covers depends on the model and video. Synthesia's pricing page showed two offers on October 19, 2026: Starter at $29/month or $18 billed yearly in its server-rendered prices, and $19/month or $14 billed yearly in a browser session the same day. Starter includes 15,000 credits a year (up to about 150 video minutes).
• 02HeyGen's free plan allows 3 videos a month, each up to 1 minute. Synthesia's free Basic plan includes 10 video minutes a month with a Synthesia watermark.
• 03Pro and team plans: HeyGen Pro is $49/month ($41 billed yearly) with 1,000 credits and 4K. HeyGen retired its Team plan; Business is $149/month ($119 billed yearly) with 1,500 credits, plus $20 per extra seat. Synthesia Pro is $89/month or $64 billed yearly ($59 billed yearly on the lower offer) for 72,000 credits a year (up to about 720 video minutes). HeyGen Pro is cheaper on either Synthesia offer; Synthesia Starter is cheaper billed yearly.
• 04Enterprise: both are contact-sales, and neither publishes an Enterprise price.

• 01Certifications: Synthesia's Trust Center says it is SOC 2 Type II compliant and certified to ISO/IEC 27001:2022, ISO/IEC 27701:2019 and ISO/IEC 42001:2023, and lists GDPR and UK Cyber Essentials. HeyGen states SOC 2 Type II, GDPR and CCPA; BestStacked found no ISO 27001 claim on HeyGen's security pages.
• 02Admin controls: Synthesia lists SAML/SSO, brand kits, SCORM export and a dedicated Customer Success team on Enterprise, and moderates content with a mix of human and AI review (priority moderation time on Enterprise). HeyGen lists SAML/SSO, SCORM export, LMS integrations and interactive video on Business ($149 a month), and SCIM, multi-workspace control and team-member MFA on Enterprise.
• 03Training features: Synthesia sells AI roleplay training at $25 per learner a month, lists interactive quizzes and branching, and says embedded videos update automatically after edits (Smart Updates). HeyGen lists interactive video (quizzes and links) and SCORM export on Business.
• 04Positioning: Synthesia says it is trusted by over 90% of Fortune 100 companies and markets training, onboarding and internal comms first. HeyGen says 100,000+ businesses use it and markets sales, marketing, course and social video first. Neither lists an on-premise deployment; Synthesia describes itself as browser-based.