T3 Code is a lightweight GUI for coding agents. Polystro is the desktop workstream system around those agents.
T3 Code is a good comparison because it speaks to the same AI-native buyer, but with a very different product philosophy. T3 Code is lighter and more minimal. Polystro is intentionally broader because it tries to hold the whole local workstream together, not just provide a thin agent surface.
Where the workflow actually diverges in practice.
Product scope
Polystro
Polystro is a workstream system around agents, with routing, browser identities, services, review, and planning.
T3 Code
T3 Code is intentionally minimal: a thin GUI around coding agents.
Project handling
Polystro
Projects and sessions can stay visible together, with linked switching between the attached surfaces.
T3 Code
T3 Code can handle multiple projects, but the public product story does not show the surrounding environment moving with those switches.
Who this fits
Polystro
Better when your problem is managing the whole setup around agents.
T3 Code
Better when you want the lightest possible layer on top of Claude or Codex.
Where the confirmed capability set differs.
This is the faster way to read the comparison: what we could confirm in the official material that actually matters to this workflow.
Free
Check for free, dash for free tier plus paid, cross for paid only.
Polystro
T3 Code
No internal credit system
Check when usage stays with your own subscriptions/providers, cross when usage is bundled into internal plans or credits.
Polystro
T3 Code
Multi LLM access
Check for broad multi-provider access, dash for a limited set across different companies, cross for company-specific models only.
Polystro
T3 Code
Open source
Check for open source, cross for closed source.
Polystro
T3 Code
Parallel agents
Official pages or docs confirm multiple agents or tasks can run at the same time.
Polystro
T3 Code
Same-project side-by-side sessions
Can you see multiple agent sessions from the same project at once, side by side, instead of switching through a tab or thread list to inspect them one at a time?
Polystro
T3 Code
Cross-project side-by-side sessions
Can you see agent sessions from different projects at the same time, side by side, instead of switching projects or session lists to inspect them?
Polystro
T3 Code
Context-linked switching
When you switch projects, workstreams, or worktrees, do the browser, terminal, and attached context switch with you as one linked unit?
Polystro
T3 Code
Multi-project visibility
Official material confirms project switching or multi-project work in the same product.
Polystro
T3 Code
Browser in the workflow
A built-in browser or browser-assisted workflow is confirmed in official material.
Polystro
T3 Code
Browser identity isolation
Separate browser identities, account views, or session isolation are explicitly documented.
Polystro
T3 Code
Local routing and port handling
Ports, forwarding, or local app access are confirmed as part of the workflow.
Polystro
T3 Code
Review and merge flow
Official material confirms built-in diff review, review queue, or merge workflow.
Polystro
T3 Code
Prompting on the go
Away-from-desk continuation, web/mobile access, or similar async continuation is confirmed.
Polystro
T3 Code
Local environment control
The product explicitly centers your machine and the attached local development environment.
Polystro
T3 Code
Cross-platform desktop
Check for macOS + Windows + Linux, dash for 2 of the 3, cross for only 1 platform or no public confirmation beyond that.
Polystro
T3 Code
$9/month billed yearly ($108/year) or $12 monthly
Yes. Bring your own CLI subscriptions and agent setup, and use the models those tools support without Polystro adding model credits or markup.
You pay Polystro for the desktop workflow. Your model and agent usage stay with the providers you already use.
Closed source
No public pricing page found.
Partial. Today it is explicitly tied to Codex and Claude, so it is bring-your-own setup but not wide-open model flexibility.
The README says it works with your installed coding-agent setup rather than a bundled model-credit system.
Open source (MIT)
T3 Code presents itself as the best way to code with AI and describes itself in the README as a minimal web GUI for coding agents.
The compare-page goal is not to pretend every product is the same. It is to show where Polystro's wedge starts: the local workstream itself. That means the browser, routing, services, terminals, and project context stay attached while multiple agents work in parallel.