useagent vs Cognition AI

The capability split is architectural, not incremental. Cognition's Devin takes a task and drives it: autonomous planning, coding, testing, and PR creation, then auto-fixes review comments on open PRs. SWE-2 (September 2026) and SWE-1.7 sit behind Fusion, which routes work across model tiers and is now shipping in Devin Desktop and the CLI. FrontierCode 1.1 scores whether code is merge-worthy, and Auto-Triage turns monitored bugs into fix PRs. Sessions persist across runs, and native Windows VMs cover cross-platform builds. The buyer gets a vendor-run agent whose models, harness, and infrastructure are all Cognition's.

useAgent inverts every one of those choices. Each agent thread gets its own isolated Linux cloud computer with desktop, terminal, and browser, running Claude Code, Codex, OpenCode, or Pi behind one session UI and event contract. There are no bundled models: you connect a supported provider account or API key. Runs happen on Daytona managed sandboxes or self-hosted CubeSandbox for locality. Output is broader than PRs — documents, spreadsheets, presentations, PDFs, images, and videos with revisioned edits and native exports. Screen recording lets you review what a run actually did. Skills are imported from GitHub and pinned to tasks; memory scopes stay separated between personal and organization, and connectors to Gmail, Linear, Notion, and HubSpot use sealed server-side tokens.

The real difference: Cognition decides the agent's brain and host for you. useAgent hands you the harness and lets you pick the brain and the host.

Cognition does not publish a price. The pricing_type is contact, so the real cost is a negotiated enterprise contract that bundles Cognition's models, Devin's harness, and hosted execution — which is the point: you are not paying per token or per seat of autocomplete, you are buying an outcome and a vendor relationship. Two things in the current data make that easier to defend internally: the Fusion routing that Cognition reports delivers frontier performance at 60% lower cost (and up to 39% efficiency gain on major coding benchmarks per the September 11 news), and the vendor's productivity guarantee of up to $10M. Budgeting happens in procurement, not on a pricing page.

useAgent's software is free and open source. What you actually pay is your existing provider subscription or API key — Claude Code, Codex, OpenCode, or Pi — plus compute: Daytona managed sandboxes, or your own Linux hosts and Postgres if you self-host CubeSandbox. The hidden line item is engineering time. The README flags alpha status with APIs and schemas that may change between releases and advises pinning a tag, so add upgrade maintenance and, if you deploy it, platform-engineering hours to your real cost. For a team already paying for one of those coding subscriptions, that is a marginal increase; for anyone expecting bundled model access, it is a new bill.