Crosscheck

Multi-LLM deliberation in your browser — confer, debate, audit across models. For financial, research, and business work.

Don't trust one AI. Crosscheck asks a panel of the top models the same question at once — and shows you exactly where they agree and where they don't, so you can act on a cross-checked answer instead of a single model's guess. Frontier models are confident even when they're wrong, and each one has blind spots the others don't. Crosscheck turns that into an advantage: it runs several of them in parallel, surfaces the consensus and the disagreements, and hands you one synthesized recommendation you can trust. WHAT YOU CAN DO • Confer — ask the whole panel at once and see every answer side by side, streaming in live. • Debate — let the models argue across multiple rounds, then get one moderated synthesis. • Triangulate, audit, review, critique, plan, and pick — nine deliberation modes in all. WHY IT'S DIFFERENT • See consensus AND dissent. The disagreements are often where the real insight is. • One subscription, everywhere. The same seat works in this extension and in Claude Code / VS Code — no second subscription. • Bring your own keys. You supply your own model API keys; they're encrypted on your device and never sent to our servers. • Private by design. Your prompts and the models' responses go directly from your browser to the providers. We never receive, store, or log their content. • Compact or full-size. A quick popup from your toolbar, expandable to a full workspace with run history and per-model cost. • Max reasoning when it counts. Flip on the top tier for the questions that deserve it. BUILT FOR Research, financial, and business decisions — the calls where a second and third opinion pays for itself. Crosscheck is not designed for heavy coding or app-building. WHAT YOU NEED • A Crosscheck subscription ($20 per seat / month) — activate this browser with the seat you already have. • Your own API keys for the providers you want on the panel (e.g. Anthropic, OpenAI, Google, xAI). Usage is billed by those providers to your keys. Add your keys, ask once, and let the panel cross-check the answer. Learn more and manage your account at https://www.crosscheckagent.com