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Comet vs Replicate

A feature-by-feature comparison of Comet and Replicate across 7 capability categories.

First tool

Try Comet (opens in a new tab)

Second tool

Try Replicate (opens in a new tab)

Modalities — Replicate Wins

Modalities: Comet compared with Replicate
Feature	Comet	Replicate
Text Input	Yes, requires free plan. The sidecar assistant takes natural-language prompts for search, summaries, and page tasks.	Yes, requires free plan. Every hosted model takes a prompt (or structured input) via the HTTP API and playground.
Image Upload / Vision	Unknown. Vision on the current page is plausible for an in-browser agent, but Comet help does not spell out image attach.	Yes, requires plus plan. Many models take reference images (FLUX, Seedream, etc.). You pass files/URLs in the API.
Image Generation	Unknown. Image models exist on Perplexity web for some plans; not documented as a Comet browser feature.	Yes, requires plus plan. Hosts FLUX, Imagen, GPT Image, Recraft, and thousands of community image models. Billing is prepaid credit.
Voice Mode	Unknown. Launch copy mentioned voice on mobile; the current Comet product page does not document a voice loop.	No. You can run TTS/STT models. That is not a conversational voice loop product.
Video Understanding	Unknown. Perplexity can transcribe attached video on the web app; Comet-specific video understanding is not documented.	Partial. Hosts caption and video models. Replicate itself does not “watch YouTube” as a chat product.
Video Generation	No. Not a video generation product.	Partial. Hosts third-party video models via API; it is not a first-party video studio.
File Upload (PDF, DOCX)	Unknown. File attach is documented for Perplexity search, not as a Comet browser control.	Partial. API inputs include images, zip datasets for training. Not a PDF chat uploader.
Code Execution	Unknown. The marketing site shows the assistant building a webpage in the browser; that is not a documented code sandbox.	No. You call models. Cog packages your code; that is deploy, not a user Python sandbox in chat.
Audio Input	Unknown. Audio-file input is not described in Comet setup or privacy help.	Yes, requires plus plan. Speech and music models are listed (generate speech, music).
Canvas / Artifact Editor	Yes, requires free plan. The assistant sits in a sidecar beside the page you are browsing.	No. Playground is a form, not an artifacts canvas.
Screen Sharing / Computer Use	Yes, requires free plan. The assistant is documented acting on the live page (forms, shopping, posting) rather than only summarizing.	No. No computer-use product.

Memory & Context — Tie

Memory & Context: Comet compared with Replicate
Feature	Comet	Replicate
Persistent Memory	Unknown. Max “Brain” memory is documented for Perplexity Computer, not as a Comet default.	No. Predictions are jobs. You keep state in your app.
Large Context Window	Unknown. No token window is published for the Comet assistant.	Unknown. Depends on the model you run. No single Replicate window.
Custom Instructions	Unknown. A global assistant-instruction setting was not found in Comet help.	Partial. System prompts / input schemas per model. Not a global user profile.
Conversation History	Partial. Comet is a full browser with history (cleared in Incognito). Assistant thread history across devices is not documented.	Partial. Playground and prediction logs. The API is stateless per call.

Integrations — Tie

Integrations: Comet compared with Replicate
Feature	Comet	Replicate
Web Search / Browsing	Yes, requires free plan. Comet is built around Perplexity’s answer engine in the address bar and assistant.	No. Not a search engine. A model might browse if the author built that.
Plugins / Extensions	Yes, requires free plan. Chromium extensions are supported; Incognito disables them unless you turn them back on.	Yes, requires free plan. Thousands of community models, client libraries, webhooks, MCP server.
API Access	No. Comet is a browser. Programmatic access is the separate Perplexity API, not a Comet REST product.	Yes, requires free plan. HTTP API, Node/Python clients, deployments. Get started for free; pay for compute.
Zapier Integration	Unknown. No first-party Comet Zapier app was checked.	Unknown. No first-party Zapier listing was checked.
Custom GPTs / Bots	Partial. Email Assistant and Background Assistants are Max-tier agents, not a public custom-GPT store.	No. You deploy models, not a GPT store.
Real-time Collaboration	Unknown. Shared multiplayer browsing sessions are not documented.	No. No multiplayer canvas.
Live Social Data Integration	No. Not a live social-firehose product; it can browse social sites like any browser.	No. No live social firehose.
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.	No. Not a cited-search product.

Developer — Replicate Wins

Developer: Comet compared with Replicate
Feature	Comet	Replicate
Function Calling	Yes, requires free plan. The assistant is documented taking multi-step actions (shop, email, fill forms) rather than only answering.	Unknown. Depends on the language model you host. Not a Replicate-wide tools API.
Streaming Responses	Unknown. Token streaming in the sidecar is not called out in Comet help.	Yes, requires plus plan. Docs include streaming output for compatible models.
Fine-Tuning	No. Comet runs hosted Perplexity/partner models; there is no custom-weight training product.	Yes, requires plus plan. Trainings API: fine-tune image models (e.g. FLUX LoRA) and push the result.
Embeddings API	No. Not an embeddings API product.	Unknown. You can run embedding models if published. Not a first-party embeddings SKU.
Structured Output (JSON)	Unknown. JSON-schema guarantees are not documented for the Comet assistant.	Partial. Cog/input schemas. JSON-mode depends on the model.
Reasoning / Thinking Mode	Partial. Max Assistant on Comet is documented as a slower, routed reasoning mode for Max subscribers, not a free Deep Think toggle.	Unknown. Hosts reasoning models (e.g. Claude). No Replicate Deep Think switch.
Local Execution	No. The browser runs locally; model inference stays on Perplexity’s cloud.	Partial. Cog is open source so you can run locally. Hosted Replicate is cloud GPUs.
Open Weights	No. Comet is not an open-weights model release.	Partial. Hosts many open models. The platform and many popular models are mixed open/closed.
Multi-Agent Orchestration	Partial. Background Assistants (Max) run tasks asynchronously; that is not a general multi-agent SDK.	No. You orchestrate in your code.

Platforms — Comet Wins

Platforms: Comet compared with Replicate
Feature	Comet	Replicate
Web App	No. You download Comet. The marketing site is not a browser-in-the-browser web app.	Yes, requires free plan. replicate.com playground and dashboard.
iOS App	Yes, requires free plan. Perplexity launched a Comet iOS app; the product page lists iOS.	No. No official iOS app.
Android App	Yes, requires free plan. The product page lists Android alongside desktop.	No. No official Android app.
Desktop App	Yes, requires free plan. Standalone Mac and Windows browser; setup help covers install and default-browser.	No. API + web, not a desktop app.
Chrome Extension	No. Comet is not distributed as a Chrome Web Store extension.	No. No Chrome extension.

Privacy — Replicate Wins

Privacy: Comet compared with Replicate
Feature	Comet	Replicate
GDPR Compliant	Unknown. Needs a read of Perplexity’s current DPA before we assert GDPR for Comet.	Unknown. Needs a current DPA read.
Opt Out of Data Training	Unknown. Training opt-out is not documented on the Comet privacy-and-safety article we checked.	Unknown. Docs mention data-retention controls; the toggle was not re-read this round.
Enterprise Privacy Mode	Partial. Comet supports Chrome-like MDM policies (extensions, cookies, data clearing). That is not a published ZDR/SSO suite.	Yes, requires enterprise plan. Enterprise plans, logging/monitoring, scale. Details are sales, not a public seat price.

Workspaces — Tie

Workspaces: Comet compared with Replicate
Feature	Comet	Replicate
Projects / Folders	Unknown. Browser profiles exist; Perplexity Spaces inside Comet were not confirmed.	Unknown. Overlapping columns disagreed (no vs partial); left unverified rather than copying a no.