Character.AI vs Comet
A feature-by-feature comparison of Character.AI and Comet across 7 capability categories.
Modalities — Character.AI Wins
| Feature | Character.AI | Comet |
|---|---|---|
Text Input | Yes | Yes, requires free plan. The sidecar assistant takes natural-language prompts for search, summaries, and page tasks. |
Image Upload / Vision | Yes, requires plus plan | Unknown. Vision on the current page is plausible for an in-browser agent, but Comet help does not spell out image attach. |
Image Generation | Yes, requires plus plan. Generate character images | Unknown. Image models exist on Perplexity web for some plans; not documented as a Comet browser feature. |
Voice Mode | Yes, requires plus plan | Unknown. Launch copy mentioned voice on mobile; the current Comet product page does not document a voice loop. |
Video Understanding | No | Unknown. Perplexity can transcribe attached video on the web app; Comet-specific video understanding is not documented. |
Video Generation | No. Not a video generation product. | No. Not a video generation product. |
File Upload (PDF, DOCX) | No | Unknown. File attach is documented for Perplexity search, not as a Comet browser control. |
Code Execution | No | Unknown. The marketing site shows the assistant building a webpage in the browser; that is not a documented code sandbox. |
Audio Input | No | Unknown. Audio-file input is not described in Comet setup or privacy help. |
Canvas / Artifact Editor | No. Auto populated | Yes, requires free plan. The assistant sits in a sidecar beside the page you are browsing. |
Screen Sharing / Computer Use | No. Auto populated | Yes, requires free plan. The assistant is documented acting on the live page (forms, shopping, posting) rather than only summarizing. |
Memory & Context — Character.AI Wins
| Feature | Character.AI | Comet |
|---|---|---|
Persistent Memory | Yes. Character memory per persona | Unknown. Max “Brain” memory is documented for Perplexity Computer, not as a Comet default. |
Large Context Window | Partial. Long chats are summarised as they grow rather than kept in full. | Unknown. No token window is published for the Comet assistant. |
Custom Instructions | Yes. Character persona definition | Unknown. A global assistant-instruction setting was not found in Comet help. |
Conversation History | Yes | Partial. Comet is a full browser with history (cleared in Incognito). Assistant thread history across devices is not documented. |
Integrations — Comet Wins
| Feature | Character.AI | Comet |
|---|---|---|
Web Search / Browsing | No | Yes, requires free plan. Comet is built around Perplexity’s answer engine in the address bar and assistant. |
Plugins / Extensions | No | Yes, requires free plan. Chromium extensions are supported; Incognito disables them unless you turn them back on. |
API Access | No | No. Comet is a browser. Programmatic access is the separate Perplexity API, not a Comet REST product. |
Zapier Integration | No | Unknown. No first-party Comet Zapier app was checked. |
Custom GPTs / Bots | Yes. Auto populated | Partial. Email Assistant and Background Assistants are Max-tier agents, not a public custom-GPT store. |
Real-time Collaboration | Partial. Auto populated | Unknown. Shared multiplayer browsing sessions are not documented. |
Live Social Data Integration | No. Not a live social-firehose product; it can browse social sites like any browser. | |
Live Citation Mapping | Partial. Comet uses Perplexity’s answer engine, which cites sources on perplexity.ai; Comet help does not separately document citation UI in the sidecar. |
Developer — Tie
| Feature | Character.AI | Comet |
|---|---|---|
Function Calling | No | Yes, requires free plan. The assistant is documented taking multi-step actions (shop, email, fill forms) rather than only answering. |
Streaming Responses | Yes | Unknown. Token streaming in the sidecar is not called out in Comet help. |
Fine-Tuning | No | No. Comet runs hosted Perplexity/partner models; there is no custom-weight training product. |
Embeddings API | No | No. Not an embeddings API product. |
Structured Output (JSON) | No | Unknown. JSON-schema guarantees are not documented for the Comet assistant. |
Reasoning / Thinking Mode | No. Auto populated | Partial. Max Assistant on Comet is documented as a slower, routed reasoning mode for Max subscribers, not a free Deep Think toggle. |
Local Execution | No. The browser runs locally; model inference stays on Perplexity’s cloud. | |
Open Weights | No. Comet is not an open-weights model release. | |
Multi-Agent Orchestration | Partial. Background Assistants (Max) run tasks asynchronously; that is not a general multi-agent SDK. |
Platforms — Tie
| Feature | Character.AI | Comet |
|---|---|---|
Web App | Yes | No. You download Comet. The marketing site is not a browser-in-the-browser web app. |
iOS App | Yes | Yes, requires free plan. Perplexity launched a Comet iOS app; the product page lists iOS. |
Android App | Yes | Yes, requires free plan. The product page lists Android alongside desktop. |
Desktop App | No | Yes, requires free plan. Standalone Mac and Windows browser; setup help covers install and default-browser. |
Chrome Extension | No | No. Comet is not distributed as a Chrome Web Store extension. |
Privacy — Character.AI Wins
| Feature | Character.AI | Comet |
|---|---|---|
GDPR Compliant | Yes | Unknown. Needs a read of Perplexity’s current DPA before we assert GDPR for Comet. |
Opt Out of Data Training | No | Unknown. Training opt-out is not documented on the Comet privacy-and-safety article we checked. |
Enterprise Privacy Mode | No | Partial. Comet supports Chrome-like MDM policies (extensions, cookies, data clearing). That is not a published ZDR/SSO suite. |
Workspaces — Tie
| Feature | Character.AI | Comet |
|---|---|---|
Projects / Folders | No. Auto populated | Unknown. Browser profiles exist; Perplexity Spaces inside Comet were not confirmed. |