LarkWrite's answer

LarkWrite is built around coaching, not generation. The default interaction is reader's notes in the margin — questions about scene, voice, and structure — not paragraphs pasted into your draft. It learns your voice from your own writing samples, enforces mandatory anti-AI-tell rules on every output, and highlights any AI-suggested text so you stay visibly the author. It also works for any genre you describe (memoir, poetry, essays, fiction) rather than forcing one template.

Spatius's answer:

Spatius combines photorealistic 3D Gaussian Splatting avatars with a cloud-edge rendering architecture built specifically for real-time AI interaction. Instead of rendering every frame on cloud GPUs and streaming it as video, Spatius sends lightweight motion data to the user’s device, where the avatar is rendered locally.

This approach addresses visual quality, network reliability, device coverage, and operating cost at the same time. It allows digital humans to remain responsive during long conversations, work across web, mobile, and intelligent hardware, and scale to high-concurrency production environments.

LarkWrite's answer

Choose LarkWrite if you want a writing coach, not a ghostwriter. Compared to ChatGPT or general AI assistants, LarkWrite is designed for long-form creative work: projects, outline, export, and margin feedback anchored to your text. Compared to tools like Sudowrite or Jasper, it doesn't optimize for speed-writing finished prose — it optimizes for keeping your voice and your ownership of the draft. You get voice profiling, editable writing rules, Explore coaching chats, and optional Revise/Reframe only when you select text. Free tier lets you try it without a credit card.

Spatius's answer:

Spatius combines photorealistic 3D Gaussian Splatting avatars with a cloud-edge rendering architecture built specifically for real-time AI interaction. Instead of rendering every frame on cloud GPUs and streaming it as video, Spatius sends lightweight motion data to the user’s device, where the avatar is rendered locally.

This approach addresses visual quality, network reliability, device coverage, and operating cost at the same time. It allows digital humans to remain responsive during long conversations, work across web, mobile, and intelligent hardware, and scale to high-concurrency production environments.

LarkWrite's answer

Independent writers working on creative long-form projects: memoirists, personal essayists, poets, songwriters, and fiction authors (including NaNoWriMo drafters). Also writers who publish on Substack or Medium and want revision help that doesn't flatten their voice into generic AI prose. The product is for people who want feedback and ideas but refuse to outsource authorship.

Spatius's answer:

Spatius is built for companies and developers creating AI products that benefit from natural, face-to-face interaction. Its primary users include teams working in AI education, recruiting and interviews, customer service, smart terminals, digital assistants, intelligent devices, and AI companion products.

It is especially well suited to organizations that require long-duration conversations, high concurrency, cross-platform deployment, custom-branded characters, or reliable operation on constrained networks and hardware.

LarkWrite's answer

LarkWrite started from a simple frustration: general AI tools are good at handing you paragraphs, but bad at helping you sound like yourself on work that matters. Most "AI writing" products push generation; LarkWrite was built the other way around — a thoughtful reader in the margin first, conversation second, text suggestions only when you ask. The name and logo (a lark on a pen nib) reflect that idea: amplification of your voice, not replacement of it.

Spatius's answer:

Spatius was created to close the gap between digital human demonstrations and real-world deployment. Many avatar technologies can produce an impressive short demo, but become difficult or expensive to operate when conversations last longer, user numbers grow, or products must run across diverse devices and network environments.

The Spatius team developed its own cloud-edge 3DGS technology to solve these production challenges together. Today, Spatius helps companies turn AI into a more natural and expressive presence, bringing real-time digital humans into education, recruiting, smart devices, customer-facing terminals, and companion applications.

LarkWrite's answer

Next.js (React) — web app and API routes TypeScript — application code Anthropic Claude — AI coaching and feedback Stripe — subscriptions and billing Tailwind CSS — UI

Spatius's answer:

Spatius is primarily built on proprietary 3D Gaussian Splatting technology and a cloud-edge rendering architecture.

Its cloud-based Motion Server converts generated speech into lightweight facial and motion data, while the AvatarKit SDK renders and animates the 3DGS character locally on the client device. Platform technologies include WebGL and WebGPU for web applications, Metal for iOS, and Vulkan for Android. Spatius can receive real-time audio through technologies such as WebSocket, WebRTC, LiveKit, and Agora, and can integrate with third-party ASR, LLM, and TTS providers.

LarkWrite's answer

Individual authors and early adopters — no enterprise customers yet.

Spatius's answer:

TAL Education is one of Spatius’s leading customers. Spatius also works with established companies across education, recruiting, smart devices, and AI companion products.

Products powered by Spatius have reached millions of end users and supported tens of millions of digital human conversations, demonstrating the platform’s ability to operate in long-term, large-scale production environments.