If you've shortlisted both Multiple.chat and Qorpus, you've probably noticed they make almost the same promise: ask one question, see how ChatGPT, Claude, Gemini, and Grok each answer it, and decide from there. Both genuinely do side-by-side comparison. So the useful question isn't "which one compares models"—it's "which plumbing do I want underneath the comparison," because that's where the two products actually diverge.

The short version: Multiple.chat is a hosted workspace. You subscribe to it, and it reaches the major models through their official APIs, bundling them—plus collaboration modes, projects, files, and creation studios—into one product with one bill. Qorpus is a browser extension that doesn't host anything: it runs a prompt against the consumer AI accounts you're already logged into, in your own desktop browser, and shows the results together. If you want one tidy subscription that replaces several and gives you a saved workspace, Multiple.chat is the more natural fit. If you specifically want to compare the same ChatGPT, Gemini, and Claude apps you already use and trust—without a second subscription or your prompts routing through another company's servers—that's what Qorpus is for.

What Multiple.chat actually is

Multiple.chat's own FAQ is refreshingly clear about its architecture: it "provides access to multiple leading AI models — ChatGPT, Claude, Gemini, and Grok — through their official APIs," with web search via Perplexity and a set of image models. You don't bring your own API keys on the standard plans; access is included in the subscription, and only the Enterprise tier offers bring-your-own-keys and self-hosting. Sign-in runs through Auth0 and billing through Stripe, per its documentation.

On top of that access it layers real comparison and workflow features: a Compare Mode that shows multiple responses next to each other, several "AI Collaboration" modes (ensemble, debate, co-operative, research, humanize), Projects and file uploads that persist context, document/presentation/spreadsheet/image studios, a prompt optimizer, and auto-verification. As of July 19, 2026, its live subscription page lists a free tier with a daily allowance, Go at $8.99/month for lighter use, Pro at $20/month ($179.99 billed annually), and Smart at $90/month ($900 annually). Team plans start at $25 per seat per month. Multiple.chat's FAQ still quotes an older $14.99 Pro price, but the live checkout-facing subscription page is the more useful current source; confirm it before paying.

That's a capable multi-AI workspace. It is not the same product as Qorpus, and the gap is worth being precise about.

The three differences that actually decide it

Where the answers come from. This is the one most buyers overlook. Multiple.chat reaches models through their official APIs; Qorpus reads the consumer apps you personally sign into (chatgpt.com, gemini.google.com, claude.ai, and so on). Those are different channels, and API output and consumer-app output are not guaranteed to be identical—tooling, settings, and available versions can differ. If your goal is "did the assistant I actually rely on get this right," reading the consumer surface directly is the point of Qorpus. If you just want strong answers from good models and don't care about matching a specific app, the API channel is perfectly fine.

What you pay, and how many times. Multiple.chat is a subscription you add. For someone who doesn't already pay for several AIs, that can be the cheaper, simpler path—Go is $8.99 a month for lighter use and Pro is $20, instead of stacking ChatGPT Plus, Claude Pro, and Gemini. Qorpus sells no model access at all; it assumes you already hold those accounts and rides on top of them, so it adds no model bill but also saves nothing if you weren't already subscribed. To be accurate about the old framing: Multiple.chat's standard plans are flat subscriptions, not per-token metering, so this is a question of which subscription you'd rather pay, not of a hidden token tax.

What's stored, and where. Multiple.chat is a hosted service: your threads, projects, and files live in its workspace, and your prompts pass through its platform on the way to the providers' APIs. Qorpus keeps no chat workspace—your history stays inside each native app—and its own claim is that coordination happens locally in your browser with data kept on your device. Both approaches are reasonable; they suit different comfort levels. If the specific privacy handling matters to you, read Multiple.chat's privacy policy directly rather than relying on any summary, including this one—we didn't independently audit either product's data flows.

Dimension (as of July 2026) Multiple.chat Qorpus
What it is Hosted multi-AI workspace Browser comparison layer
Reaches models via Providers' official APIs, bundled in its plan Your own signed-in consumer accounts
Extra subscription Yes: free tier; Go $8.99/mo; Pro $20/mo None for models; you keep your own
Answer source API channel (may differ from consumer apps) The consumer apps you already use
Stored workspace Threads, projects, files, studios None; history stays in each native app
Where it runs Hosted; any browser Desktop browser extension; mobile waitlisted
Side-by-side compare Yes (Compare Mode + collaboration modes) Yes (parallel across your accounts)

Who should pick which

Choose Multiple.chat if you want a single, self-contained workspace: you'd rather pay one subscription than several, you value saved projects, files, collaboration modes, and studios, and you're comfortable with a hosted service reaching models over their APIs. It's an especially good deal for people who aren't already paying for multiple assistants, since it can replace a stack of them.

Choose Qorpus if you already subscribe to the consumer AIs and want to compare those exact accounts, don't want a second subscription or your prompts transiting another platform, and mostly need comparison rather than a full chat workspace. Its constraints are specific: it's desktop-browser-only today, with mobile on a waitlist; it needs you signed into each account; it stores no history of its own; and because it drives the vendor sites' own interfaces, it's more exposed to their changes than a hosted product is.

The important limitation here is the product-data boundary. A hosted workspace can retain projects and files because that material lives in the workspace; Qorpus avoids creating that extra repository but offers no shared history in return. Before using either with sensitive work, confirm the current privacy terms, retention controls, and account policies yourself—we have not independently audited either service's data flows.

Choose only after deciding which thing you would regret more: adding another hosted account, or giving up the persistent projects and collaboration that account enables. The method for evaluating the answers applies in either interface. If your real need is page summarization or in-place writing rather than a multi-model workspace, the more useful comparison is Qorpus against Monica, Sider, and MaxAI.

References

  1. Multiple.chat. Frequently asked questions
  2. Multiple.chat. Subscription and pricing
  3. Multiple.chat. Documentation