Builds the whole ad, not a clip
Brief it once and the Solid Agent writes the concept, picks the takes, writes the script, adds the voice and assembles a finished, editable ad.
Solid vs Synthesia: which is better for video ads?
An honest, side-by-side comparison of Solid and Synthesia on features, pricing and fit.
Quick comparison
Solid vs Synthesia: For paid social, Solid is the stronger choice. Synthesia is built for training and corporate presenter videos; the Solid Agent is built for performance ads from your real footage and creators, with all major video and image models built in. Pick Synthesia for training and onboarding videos.
What is Solid?
Solid is the AI creative engine for brands and their agencies. Its agent turns a brand’s own footage, voice and best ads into finished video ads for Meta, TikTok and YouTube. It starts from your real footage and creators, and its AI Video Generator fills only the shots that are missing. Every step stays editable: script, voice, scenes and the final cut.
What is Synthesia?
Synthesia is an AI video platform for training, onboarding and corporate communication. You write a script, pick one of up to 240+ AI avatars or create a personal avatar, and get a presenter video in 140+ languages, with dubbing, templates and interactive videos.
synthesia.io ↗How Solid works
Real footage first, generation built in
Solid is not only a generator. It cuts your real footage into ads and generates what is missing.
Real footage first
Solid edits the video you already have
- Every upload cut into scenes, described and transcribed
- The agent picks your best takes and cuts them in order
- Edit by text or on a multi-track timeline
- Your creators, products and voice, not synthetic stand-ins
Generation built in
And generates what is missing
- All major video models, including Veo and Seedance
- All major image models, including Nano Banana 2, FLUX and Seedream
- Your own scenes as references, so shots match
- AI voices and brand voice cloning
The Solid Agent
The AI ad agent that does the whole job
Other tools generate assets. The Solid Agent runs the production end to end, on your own footage and brand.
Works on your real footage
It searches every scene, transcript and person in your library and cuts your best takes in order. Generation only fills the gaps.
Knows your brand
It reads your Brand Hub, video guidelines and House Rules before every script, and remembers what you teach it.
Asks before it builds
It proposes concepts and recommends one, so you steer the idea before anything is rendered.
Edits by conversation
Rewrite a line, add hooks, swap a clip or restyle captions by typing. Every hook, body and CTA combination stays editable.
Closes the review loop
It summarizes reviewer comments, works the feedback in and translates approved ads for every market in one request.
AI-native, never hardcoded
The Solid Agent does the work. You can change every step.
Solid is a fully AI-native creative engine: the Solid Agent runs the whole production in a chat. Nothing is locked. Open any step and adjust it by hand, down to the frame in the video editor.
Concept
The Solid Agent
Proposes concepts for your brief and recommends one.
You can change
Pick one, combine them or write your own.
Script
The Solid Agent
Writes the script, hooks and CTA in your brand tone.
You can change
Edit every line, hook and call to action.
Voice
The Solid Agent
Voices the script with your brand voice or an AI voice.
You can change
Swap the voice, change the pacing or use your own recording.
Scenes and cut
The Solid Agent
Picks your best takes and cuts them in order.
You can change
Swap clips and trim by text or on the multi-track timeline.
Captions and formats
The Solid Agent
Styles captions and exports every format and language.
You can change
Restyle, move and fine-tune everything before export.
Key differences
What sets Solid and Synthesia apart
- Raw material
- SolidYour real footage and creators, cut by AI
- SynthesiaAI avatars or a personal avatar presenting a script
- Built for
- SolidPerformance ads on Meta, TikTok and YouTube
- SynthesiaTraining, onboarding and corporate communication
- Generation
- SolidAll major video and image models for B-roll and images
- SynthesiaAvatar generation
- Translation
- SolidVoice, captions and on-screen text, translated on your footage
- Synthesia140+ languages, dubbing, 1-click translation on Enterprise
- Buying
- SolidSelf-serve by card via Stripe, from €299 a month
- SynthesiaFree plan, from $19 a month
Feature by feature
Solid vs Synthesia, side by side
| Feature | Synthesia | |
|---|---|---|
| Real footage, cut by AI | ||
| Ads cut from your own footage | YesScene detection, A-roll and B-roll sorting, the agent cuts your takes in order | PartialAvatar-first |
| Edit video by editing text | YesDelete words and the video cuts with them | PartialScript-driven avatar videos |
| Generation, built in | ||
| AI agent that builds the whole ad | YesSolid Agent: concept, scenes, script, voice and edit | Not documented |
| Generative video and images | YesAll major video and image models, including Veo, Seedance, Nano Banana 2, FLUX and Seedream; your scenes as references | PartialAvatar videos |
| AI avatars and actors | NoNot offered, by design: real creators only | YesUp to 240+ avatars, personal avatars |
| AI voices and voice cloning | YesElevenLabs library plus Solid voices, brand voice clone from a 10 second sample | Yes140+ languages and voices |
| Brand | ||
| Brand guidelines the AI follows | YesBrand Hub, drafted from your website, plus video guidelines and House Rules | PartialBrand kit on Enterprise |
| Brand fonts, colors and pronunciation | YesFonts and palette in the editor, pronunciation dictionary | PartialBrand kit on Enterprise |
| Review and export | ||
| Real-time collaboration and comments on the frame | YesLive project, comments pinned to the moment, @mentions, approval statuses | PartialLive collaboration on Enterprise |
| Client review links without an account | YesGuest links, reviewers can never edit | Not documented |
| Translation | YesSpeech, captions and on-screen text, translated on your footage | Yes140+ languages, dubbing |
| Integrations and trust | ||
| MCP or API | YesMCP connector for Claude, ChatGPT, Grok or Langdock | PartialAPI on Enterprise |
| EU hosting, GDPR DPA and SSO | YesGerman company, EU hosting, SSO on Enterprise | PartialSSO on Enterprise |
| Buying | ||
| Self-serve checkout by card | YesPay by card through Stripe, invoice on Enterprise | Yes |
Based on publicly available information. “Not documented” means we could not find it in Synthesia’s public material.
Honest assessment
Where each tool excels, and where it falls short
Where Solid excels
- Performance ads cut from your real footage and creators
- Generation built in for B-roll and images
- Hook, body and CTA variants for testing
- Brand Hub keeps every ad on brand
- Team and client review, workspace per brand
Where Synthesia excels
- Large AI avatar library and personal avatars
- 140+ languages and dubbing
- Built for training, onboarding and corporate video
- Interactive videos and SCORM export
- Free plan and low entry price
Where Solid falls short
- No AI avatars, by design
- Not built for training or corporate video
Where Synthesia falls short
- Avatar videos rather than ads from your own creators
- Not built around paid social or ad testing
- Brand kit and collaboration only on Enterprise
Pricing
Solid vs Synthesia pricing
Solid
Self-serve plans by brands and ads per month, pay by card through Stripe.
- Starter
- €299 / month
- 1 brand, about 15 ads a month
- Grow
- €999 / month
- Up to 3 brands, about 75 ads a month
- Scale
- €1,999 / month
- Up to 10 brands, about 150 ads a month
- Enterprise
- Custom
- 250 to 1,000+ ads a month
Synthesia
Credits and video minutes per month.
- Basic
- $0
- 10 minutes a month, 9 avatars
- Starter
- $19 / month
- $14 billed yearly, 125+ avatars
- Pro
- $89 / month
- $59 billed yearly, 180+ avatars, 5 personal avatars
- Enterprise
- Custom
- 240+ avatars, brand kit, collaboration, API
Prices from the Synthesia pricing page; first-month discounts not included.
Sources: Synthesia pricing page. Prices verified 28 October 2026; always check current prices with each provider.
The verdict
Choose Solid or Synthesia?
Choose Solid if
- You run paid social and need many ad variations
- You have footage, creators and past winning ads
- Brand consistency matters for every ad
- Several people or clients review and approve ads
- You want EU hosting and a GDPR DPA
Choose Synthesia if
- You make training, onboarding or internal videos
- You want an AI presenter or your own avatar
- You need many languages and dubbing
- You want interactive videos or SCORM export
Bottom line: Synthesia starts from AI avatars presenting a script. Solid starts from your brand, and the Solid Agent turns it into finished ads. For performance video ads, that is the stronger foundation.
FAQs
Solid vs Synthesia: common questions
Anything else? We’re happy to walk you through Solid with your own footage.
Book a demoIs Solid or Synthesia better for ads?
For performance ads cut from your own footage and creators, Solid. For presenter-led training and corporate videos, Synthesia.
Does Solid use AI avatars like Synthesia?
No. Solid cuts ads from real footage and real creators you own, and generates B-roll and images for missing shots.
How does Synthesia pricing compare to Solid?
Synthesia has a free plan and paid plans from $19 a month. Solid starts at €299 a month for one brand and about 15 ads, self-serve by card.
Can Solid translate ads for new markets?
Yes. Solid translates voice, captions and on-screen text on your own footage and keeps the timing, so a winning ad goes live in new markets fast.
Can I edit what the Solid Agent makes?
Yes, every step. The Solid Agent does the work in a chat, but nothing is hardcoded: you can change the concept, rewrite the script, swap the voice, replace scenes and fine-tune the final cut in the video editor, by text or on the timeline.
Keep reading
Related pages
Solid is the AI creative engine for brands and their agencies. Its agent turns a brand’s own footage, creators and best ads into finished video ads for Meta, TikTok and YouTube, and generates only the shots that are missing.
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See the difference with your own footage
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