Codecast vs T3 Code
T3 Code is an open source control surface for the coding agents on your own machine. Codecast is the workspace a team and its agents share. They answer different questions, and threads you start in T3 Code sync into Codecast like any other session.
Codecast is a workspace for a team and its coding agents. A daemon syncs every session your team runs, on any supported agent and any machine, into one searchable, steerable record, and the team's chat, tasks, plans, docs, pull requests and decisions live on that record with agents taking part in each.
T3 Code describes itself as an agent harness control surface: a desktop app, web app and iOS and Android apps for starting and steering agent threads on a machine you own. It works with your own subscriptions to Claude Code, Codex, Cursor, Grok Build, OpenCode and Google Antigravity, gives each thread its own branch or worktree, and opens the pull request for you. It is MIT licensed, and its README calls the project very early. T3 Code’s site.
Bottom line
If the question is "what is the best window for running my own agents", T3 Code is a strong answer and you should try it. If the question is "what are all of us and all our agents doing, what did they decide, and who needs to act", that is Codecast. Nothing stops you using both: keep T3 Code as the place you run a thread, and let Codecast be the record your team reads.
Side by side
| Codecast | T3 Code | |
|---|---|---|
| Core model | Records and steers the agent sessions you already run in your own terminals; adds a team layer on top | Starts and drives agent threads itself, one person's machines at a time |
| Agents supported | Claude Code, Codex CLI, Cursor, Gemini (OpenCode and pi in progress) | Claude Code, Codex, Cursor, Grok Build, OpenCode and Google Antigravity |
| Whose work it shows | Everyone on the team, across every machine a daemon runs on | Yours: the environments you have paired to your own account or devices |
| Team visibility | Every teammate's sessions in one feed and inbox, with per-directory privacy controls | No team or organization features in its docs or on its site |
| Search & memory | Full-text search across all past sessions; agents query team history themselves (cast search / cast ask) | Thread history inside the app; no search across a team's sessions is documented |
| Line-level attribution | cast blame traces any line of code to the conversation that wrote it | Not documented; each turn shows its own diff for review |
| Remote steering | Web, desktop, and iOS apps; answer permission prompts from any device | iOS and Android apps, web and desktop, through T3 Connect or direct pairing; the host machine must stay running |
| Git and pull requests | Pull requests linked to the sessions that wrote them, with review in the app | A branch or worktree per thread, one button to commit, push and open the pull request, on GitHub, GitLab, Bitbucket and others |
| Around the sessions | Team chat, calls, tasks, plans, docs and decisions, with agents taking part in each | The threads themselves; a terminal, a simulator panel and an MCP server other agents can connect to |
| Open source | MIT, self-hostable backend | MIT; built to be forked |
Choose T3 Code when
- You work alone and want one fast window to start, watch and review your own agent threads.
- You want the widest choice of harnesses on your own subscriptions, including Grok Build, OpenCode and Antigravity.
- You want the app itself to own the branch, the worktree and the pull request for each thread.
- You want something you can fork and reshape.
Choose Codecast when
- More than one person runs agents, and you need to see each other's sessions, hand work over and answer what is waiting.
- You keep running agents in your own terminals and want them recorded without changing how you start them.
- You want a permanent record your agents can search, and any line of code traced back to the conversation that wrote it.
- The work around the code matters as much as the sessions: tasks, plans, docs, chat and decisions in the same place.
They compose. T3 Code drives the agents' own harnesses, which keep their transcripts on disk, so a Codecast daemon on the same machine syncs a T3 Code thread like any other session. We checked this on 2026-10-12 with a Claude thread and a Codex thread started in the T3 Code desktop app: both appeared in Codecast with no setup, the Claude one within about a minute. Run threads in T3 Code, and let Codecast give them a team, a search box and a history.
T3 Code facts read from its public docs on 2026-10-12. Tell us if something changed.