Both platforms power real-time interactive AI avatars, but they take very different approaches to where rendering happens and what that means for cost, bandwidth, and deployment flexibility. Here’s the honest breakdown.
Quick verdict
Teams building production-scale conversational AI avatar products on mobile, web, or embedded hardware where bandwidth constraints are real, unit economics matter, and native SDK support is required from day one.
Developers who want a managed, cloud-hosted avatar pipeline and are comfortable with cloud-dependent infrastructure plus a per-minute credit model. LiveAvatar fits best when you're already aligned with a web-first deployment model.
What are Spatius and LiveAvatar?
Spatius - On-Device Edge Rendering for Real-Time Avatars
Spatius is a real-time AI avatar platform built around on-device edge rendering. Instead of streaming compressed video from the cloud, Spatius runs the avatar rendering process locally on the user's device. Motion data is approximately 10–15 KB/s. End-to-end latency and offline behavior depend on the selected integration, voice stack, region, network, and client device. Native SDKs cover Web, iOS, and Android; verify target devices before deployment.
- → Starting price: Free - $0/mo (~50 min/mo)
- → End-to-end latency: depends on the full STT -> LLM -> TTS -> avatar pipeline
- → SDK coverage: Web, iOS & Android native SDKs
- → Device reach: Web, iOS, and Android support; verify target devices
- → Time to first session: Under 30 minutes with the quickstart guide
LiveAvatar - HeyGen's Cloud-Hosted Realtime Avatar API
LiveAvatar is HeyGen's real-time avatar API for conversational AI agents. It streams avatar video from the cloud via WebRTC and LiveKit. Developers can choose Full mode, where HeyGen hosts the full ASR, LLM, TTS, and avatar stack, or Lite mode, where you bring your own ASR, LLM, and TTS while HeyGen handles the avatar stream. The platform is cloud-managed and web-first.
- → Pricing (Full mode): ~$0.158–$0.190/min from included credits
- → Pricing (Lite mode): ~$0.079–$0.095/min from included credits
- → Starting plan: $19/mo (200 credits; 100 min Full mode or 200 min Lite mode)
- → Rendering: Cloud video streaming via WebRTC / LiveKit
- → Bring your own LLM: Supported in Lite mode
Feature comparison
Side-by-side breakdown of key capabilities. LiveAvatar pricing last verified September 2, 2026.
| Feature | Spatius | LiveAvatar |
|---|---|---|
| Core Technology | ||
| Rendering approach | On-device edge rendering | Cloud video streaming (WebRTC / LiveKit) |
| Bandwidth required | 10–15 KB/s | High-bandwidth cloud video stream |
| End-to-end latency | Depends on the full pipeline¹ | Not publicly verified end-to-end² |
| Works on low bandwidth | Yes | No |
| Cost per minute | $0.007/min (Scale) · $0.009/min (Starter) | $0.158–$0.190/min Full · $0.079–$0.095/min Lite |
| Free tier | ~50 min/mo | 10 credits · 5 min Full or 10 min Lite |
| Starting paid plan | $19/mo | $19/mo |
| Platform & SDKs | ||
| Web SDK | Yes | Yes |
| iOS SDK | Native | Not publicly referenced³ |
| Android SDK | Native | Not publicly referenced³ |
| Device coverage | Web, iOS, and Android support; verify target devices | Web / browser-first deployment |
| Integration | ||
| Bring your own LLM | Yes | Yes (Lite mode) |
| LiveKit / WebRTC support | Yes | Yes |
| Hardware / embedded suitability | Yes | Cloud-dependent |
| Offline-tolerant deployment | Yes | No |
| Deployment | ||
| Concurrent sessions (Scale plan) | 40 | Not clearly disclosed |
| Max session length (Scale) | Unlimited | Varies by plan |
| Enterprise / isolated deployment | Yes | Cloud only |
¹ Spatius end-to-end latency depends on the full round-trip pipeline: user finishes speaking -> STT -> LLM -> TTS -> avatar begins responding.
² LiveAvatar has not published a verified end-to-end latency benchmark covering the full STT -> LLM -> TTS -> avatar pipeline in official docs as of April 2026. Public materials describe the transport layer, but not the comparable full-pipeline figure.
³ HeyGen publishes a Web SDK for LiveAvatar. Dedicated native iOS and Android SDKs are not referenced in public documentation as of April 2026.
Where Spatius pulls ahead
Four areas where Spatius offers a fundamentally different, and better, experience.
About 94–95% Lower Than LiveAvatar Full
Spatius Starter costs $0.009/min for the avatar layer. LiveAvatar Full mode works out to approximately $0.158–$0.190/min from included credits, making the Spatius rendering rate about 94–95% lower. Against LiveAvatar Lite at roughly $0.079–$0.095/min, the difference is about 89–91%. Compare total stack cost separately when you add STT, LLM, and TTS to a rendering-only architecture.
Works Anywhere, Not Just on Fast Networks
LiveAvatar streams compressed video from the cloud. That works well on stable office Wi-Fi, but it creates a hard dependency on reliable, high-bandwidth connectivity. Spatius renders locally on the user device, so bandwidth stays at 10–15 KB/s, closer to a voice call than a video stream.
Built for Hardware and Embedded Use Cases
On-device rendering isn't just a cost optimization. It unlocks deployment environments that cloud-streaming platforms structurally struggle with: kiosks, reception robots, retail fixtures, in-vehicle systems, and other always-on physical installations.
Predictable Cost at Production Scale
LiveAvatar meters cost through credits and overage pricing. At production volumes, that makes monthly spend harder to forecast. Spatius Scale includes ~40,000 min/mo at $0.007/min, 40 concurrent sessions, and no per-session limits, so per-minute economics stay predictable as usage grows.
Pricing at a glance
Spatius
- Free - $0/mo
- ~50 min/mo · 2 concurrent sessions · Web, iOS & Android SDKs
- Starter - $19/mo
- ~2,200 min/mo · $0.009/min · 5 concurrent sessions
- Scale - $299/mo
- ~40,000 min/mo · $0.007/min · 40 concurrent sessions · No session limits
- Enterprise - Custom
- Unlimited usage · Isolated deployment · Dedicated integration support
LiveAvatar
- Free - $0/mo
- 10 credits · 5 min Full mode or 10 min Lite mode
- Starter - $19/mo
- 200 credits · 100 min Full mode or 200 min Lite mode
- Essential - $99/mo
- 1,100 credits · 550 min Full mode or 1,100 min Lite mode
- Business - $475/mo
- 6,000 credits · 3,000 min Full mode or 6,000 min Lite mode
Verified September 2, 2026. One credit buys one Lite minute; Full mode uses two credits per minute. Older LiveAvatar documentation may still show previous allowances.
For a plan-by-plan breakdown, overage rates, and a source freshness check, read our LiveAvatar pricing guide.
Frequently asked questions
Is Spatius a good alternative to LiveAvatar?
Yes, especially if your priorities are cost efficiency, mobile-native deployment, low-bandwidth environments, or hardware and embedded use cases. If you’re already committed to a cloud-hosted, browser-first deployment model, LiveAvatar can still be a reasonable fit.
How much more affordable is Spatius than LiveAvatar?
On a per-minute basis, Spatius Starter at $0.009/min is about 94–95% lower than the $0.158–$0.190 included-credit rate for LiveAvatar Full mode. Compared with LiveAvatar Lite at $0.079–$0.095/min, the Spatius avatar-layer rate is about 89–91% lower. Total stack cost still depends on the STT, LLM, and TTS services used with a rendering-only setup.
Does Spatius have iOS and Android SDKs?
Yes. Spatius ships native SDKs for Web, iOS, and Android on every plan, including the free tier. LiveAvatar publicly references a Web SDK, but native iOS and Android SDKs are not cited in its public docs as of April 2026.
How does Spatius achieve such low costs?
The difference comes from rendering architecture. LiveAvatar streams avatar video from the cloud, which means cloud GPU compute, encoding, and bandwidth egress costs are incurred every session minute. Spatius renders the avatar locally on the user’s device, dramatically reducing server-side cost.
How does Spatius latency compare to LiveAvatar?
Spatius’s end-to-end latency should be measured across the complete pipeline from user speech completion to avatar response. LiveAvatar has not published an equivalent verified end-to-end benchmark in its official documentation as of April 2026. That means direct apples-to-apples comparison is not currently available from public sources.
Can I use my own LLM with Spatius?
Yes. Spatius supports BYO LLM across plans via LiveKit, WebSocket, and RTC integration paths. LiveAvatar also supports BYO LLM, but in Lite mode rather than the fully managed Full mode.
How long does it take to get started with Spatius?
Most developers can get their first working session running in under 30 minutes with the quickstart guide. The free tier includes about 50 minutes per month, so teams can prototype before committing to paid usage.
Other alternatives
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