Head to head · Agent harnesses · October 2026 research run
T3 Code vs Unstoppable
T3 Code scores 51.9 (D) on agent readiness against Unstoppable's 34.7 (F), and leads in 4 of 7 scored categories. Unstoppable leads on transparency & trust. Both do agent harnesses.
Best agent harnesses and coding agents · All 1500 harnesses comparisons
Which one, for what
T3 Code D
Best for Developers who want one app, including on their phone, to drive several coding agents they already pay for.
Ahead on
- Schema & documentation, 55 against 30
- Agent ergonomics, 60 against 5
- Payments & pricing, 60 against 30
- Maintenance & community, 75 against 58
Also in its favour
- Open source
Watch for
Usage data on by default, with hashed OpenAI and Claude account identifiers, and relay traces to Axiom
Best for A developer who runs Claude Code, Codex and Cursor on existing plans and wants parallel worktrees, pipelines and phone check-ins in one app.
Ahead on
- Transparency & trust, 56 against 51
Also in its favour
- Free to start without a card
Watch for
No API, MCP server, SDK or documented CLI for an outside agent. A Linux command-line tool and MCP tools for cloud tasks appear only in changelog lines
Why the edge
Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.
Agent ergonomics T3 Code +55
T3 Code 60
Harness reading. Remote control from phone or browser, portable handoffs between providers and managed policies for teams (60).
Unstoppable 5
These lines measure an interface an agent calls, and Unstoppable has none, so context cost, output controls and retries score nothing. For the person, a usage limit shows choices to wait for the reset or continue on credits (2 of 20). Guest use with no account, a first-run page that imports Claude and Codex projects, and few required settings. No SDK (3 of 15). Total 5.
Payments & pricing T3 Code +30
T3 Code 60
Free self-hosted software with nothing to buy, so 0 for a protocol and 20 each for public pricing, a free tier and onboarding with no sign-up, 60.
Unstoppable 30
No x402, MPP or L402 (0). The app is published as free, but AI credit prices appear only after sign-in, and no pricing page exists (unstoppable.ai/pricing redirects to the home page). Plan prices of $19, $29 and $49 appear only in an 11 August 2026 blog post (10). Guest use with no account, and 10 free AI credits a day with no card (20). A person has to download and install the app, so no autonomous onboarding (0). Total 30.
Schema & documentation T3 Code +25
T3 Code 55
Harness reading. User docs in the repository (managed policy, handoffs, providers, telemetry), AGENTS.md for contributors, a server other clients connect to (55).
Unstoppable 30
Graded on the interface an outside agent can use, which is none. No API, OpenAPI file, MCP server or documented command (0). unstoppable.ai/llms.txt lists the product, help and policy pages in Markdown (10). Twenty-two dated help articles explain for a person what each part does and when to use it, such as Code and Work modes and approval modes (5 of 20). No typed inputs an agent could call (0). Step-by-step examples for people and named error states such as usage limit reached and update failed, with no error responses for an agent (3 of 15). Numbered versions and a public dated changelog, which lists only four releases from 20 to 23 October 2026 (12 of 15). Total 30.
Maintenance & community T3 Code +17
T3 Code 75
Commits and nightly tags on 6 November 2026 (30). More than three releases in 90 days (20). GitHub issues and pull requests weren't read (GitHub's pages refuse these sessions), so that line is scored absent (0). Current official apps and install script (15). CI on push (10). 30 + 20 + 0 + 15 + 10 = 75.
Unstoppable 58
Read for a closed product. Version 1.15.0 on 23 October 2026, and iOS 1.1.9 on 27 October (30). Four desktop releases from 20 to 23 October and nine iOS updates since 11 August 2026 (20). A public changelog, a support email, in-app feedback and a Discord server, none tested for replies. Help articles were updated between 19 and 24 October (6 of 15). No SDK and no MCP registry entry (0). Windows updates check signatures per the 1.13.0 notes, with no build pipeline to inspect (2 of 10). Total 58.
Transparency & trust Unstoppable +5
T3 Code 51
MIT (30). docs/user/telemetry.md lists what is sent and what isn't, but includes hashed third-party account identifiers and the README doesn't mention it (15 of 30). No deprecation policy (5). Disclosed with an opt-out, on by default (12 of 20). 30 + 15 + 5 + 12 = 62.
Unstoppable 56
Closed source under terms of 6 October 2026 that name Unstoppable Domains, Inc. and Delaware law. The terms forbid reverse engineering and building a competing product (15). The privacy policy of 8 October 2026 is written for this product. It states activity sharing levels, Off by default, secret removal and encryption, and configurable transcript retention. It gives no retention periods, names no subprocessors, and says usage telemetry may sync depending on settings, which the site's 'we don't collect your code or conversations' leaves open (16 of 30). No deprecation policy. The terms allow removing parts of the service without notice. The changelog dates one retirement (GPT 5.5 to GPT 6.1 Sol) (3 of 20). No subprocessors or data locations disclosed, and the telemetry the app sends has no documented opt-out (6 of 20). Total 40.
Score by category
| Category | Weight this run | T3 Code | Unstoppable | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 43 | 45 | Unstoppable +2 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 55 | 30 | T3 Code +25 |
| Agent ergonomics | 13%16.2 | 60 | 5 | T3 Code +55 |
| Security & auth | 14%17.5 | 35 | 36 | Unstoppable +1 |
| Payments & pricing | 10%12.5 | 60 | 30 | T3 Code +30 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 75 | 58 | T3 Code +17 |
| Transparency & trust | 7%8.8 | 51 | 56 | Unstoppable +5 |
| Negative events | ≤15 | 0 | 0 | |
| Total | D 51.9/100 | F 34.7/100 |
Facts side by side
| Fact | T3 Code | Unstoppable |
|---|---|---|
| Kind | Agent harness | Agent harness |
| Vendor | T3 Tools Inc. | Unstoppable Domains, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | ||
| Auth | None | None |
| Pricing | Free | Freemium |
| x402 | no | no |
| Licence | MIT | Proprietary, under Unstoppable Domains, Inc.'s Terms of Service. No source published |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| Last release | 2026-11-06 | 2026-10-23 |
| Terms last updated | no document linked | 2026-10-06 |
| Privacy policy last updated | no document linked | 2026-10-08 |
| Customer content may train models | not read yet | not found in the text |
| Terms restrict automated access | not read yet | not found in the text |
| Terms restrict benchmarking | not read yet | yes |
| Terms or service can change without notice | not read yet | not found in the text |
| Arbitration or class-action waiver | not read yet | yes |
How the scores have moved
T3 Code
No score change since it was listed.
Verdicts
T3 Code
A fast-moving open-source way to run and steer several coding agents from desktop, browser or phone, using the subscriptions you already have. It's pre-1.0, and it sends usage data by default, including hashed identifiers for your OpenAI and Claude accounts, with the opt-out documented outside the README.
Unstoppable
Unstoppable runs several coding agents side by side in separate worktrees on the owner's Claude, ChatGPT or Cursor plans, with dated help articles and a public changelog. It has no API, MCP server or documented command an outside agent can call, every chat starts in Full access, and its pages disagree on which parts need a paid plan.
Before you call either
T3 Code
- Set T3CODE_TELEMETRY_ENABLED=false before starting the server if you don't want usage events sent
- Install and log in to at least one provider CLI first, such as codex login or claude auth login
- Use a managed policy to fix settings across a team
Unstoppable
- Don't plan to drive Unstoppable from another agent. It has no documented API, MCP server or CLI. Call Claude Code, Codex or Cursor directly and let the person use Unstoppable around them
- Inside Unstoppable, check the approval mode before acting. New chats start in Full access unless the person set Ask or Accept edits in Settings, Approvals
- When a Claude or Codex usage limit is reached, ask the person before choosing Use credits now or Always use credits, since both spend their AI credits
- Keep each task in its own worktree and let the person review the diff and press Create PR, rather than pushing to a shared branch
Questions
Which is better for AI agents, T3 Code or Unstoppable?
T3 Code scores 51.9 (D) on agent readiness against Unstoppable's 34.7 (F), and leads in 4 of 7 scored categories. Unstoppable leads on transparency & trust.
Are T3 Code and Unstoppable open source?
T3 Code is open source (MIT). No open-source release is listed for Unstoppable.
Other comparisons with T3 Code or Unstoppable
- Agent Zero vs T3 Code
- Agent Zero vs Unstoppable
- Aider vs T3 Code
- Aider vs Unstoppable
- Amp vs T3 Code
- Amp vs Unstoppable
- Antigravity CLI vs T3 Code
- Antigravity CLI vs Unstoppable
- Auggie CLI vs T3 Code
- Auggie CLI vs Unstoppable
- AXLR vs T3 Code
- AXLR vs Unstoppable
- Claude Code vs T3 Code
- Claude Code vs Unstoppable
- Cline vs T3 Code
- Cline vs Unstoppable
- Conductor vs T3 Code
- Conductor vs Unstoppable
- Crush vs T3 Code
- Crush vs Unstoppable
- Cursor CLI vs T3 Code
- Cursor CLI vs Unstoppable
- DeepSeek Harness (dsh) vs T3 Code
- DeepSeek Harness (dsh) vs Unstoppable
- dsh-superagent (DeepSeek) vs T3 Code
- dsh-superagent (DeepSeek) vs Unstoppable
- Devin vs T3 Code
- Devin vs Unstoppable
- Droid CLI vs T3 Code
- Droid CLI vs Unstoppable
- Pi vs T3 Code
- Pi vs Unstoppable
- Emdash vs T3 Code
- Emdash vs Unstoppable
- Gemini CLI vs T3 Code
- Gemini CLI vs Unstoppable
- GitHub Copilot CLI vs T3 Code
- GitHub Copilot CLI vs Unstoppable
- goose vs T3 Code
- goose vs Unstoppable
- Harness² vs T3 Code
- Harness² vs Unstoppable
- HarnessRouter vs T3 Code
- HarnessRouter vs Unstoppable
- Jules vs T3 Code
- Jules vs Unstoppable
- Junie CLI vs T3 Code
- Junie CLI vs Unstoppable
- Kilo Code CLI vs T3 Code
- Kilo Code CLI vs Unstoppable
- Kimi Code CLI vs T3 Code
- Kimi Code CLI vs Unstoppable
- Kiro CLI vs T3 Code
- Kiro CLI vs Unstoppable
- Letta vs T3 Code
- Letta vs Unstoppable
- mini-swe-agent vs T3 Code
- mini-swe-agent vs Unstoppable
- MiniMax Code vs T3 Code
- MiniMax Code vs Unstoppable
- Mistral Vibe CLI vs T3 Code
- Mistral Vibe CLI vs Unstoppable
- Muse Code vs T3 Code
- Muse Code vs Unstoppable
- OpenAI Agents API vs T3 Code
- OpenAI Agents API vs Unstoppable
- OpenAI Codex vs T3 Code
- OpenAI Codex vs Unstoppable
- OpenCode vs T3 Code
- OpenCode vs Unstoppable
- OpenHands vs T3 Code
- OpenHands vs Unstoppable
- Orca vs T3 Code
- Orca vs Unstoppable
- Paseo vs T3 Code
- Paseo vs Unstoppable
- Prime Agent vs T3 Code
- Prime Agent vs Unstoppable
- Qoder CLI vs T3 Code
- Qoder CLI vs Unstoppable
- Qwen Code vs T3 Code
- Qwen Code vs Unstoppable
- Mirror CLI vs T3 Code
- Mirror CLI vs Unstoppable
- Rovo Dev CLI vs T3 Code
- Rovo Dev CLI vs Unstoppable
- Sculptor vs T3 Code
- Sculptor vs Unstoppable
- T3 Code vs Traycer
- T3 Code vs Verdent
- T3 Code vs Vibe-Trading
- T3 Code vs Warp (Warp Agent CLI and the Oz Agent API)
- Traycer vs Unstoppable
- Clawboo vs T3 Code
- Clawboo vs Unstoppable
- CLI Manager vs T3 Code
- CLI Manager vs Unstoppable
- Harness vs T3 Code
- Harness vs Unstoppable
- OpenMausBot vs T3 Code
- OpenMausBot vs Unstoppable
- Paperclip vs T3 Code
- Paperclip vs Unstoppable
- Parallax vs T3 Code
- Parallax vs Unstoppable
- Unstoppable vs Verdent
- Unstoppable vs Vibe-Trading
- Unstoppable vs Warp (Warp Agent CLI and the Oz Agent API)
Machine-readable
- This page as Markdown
/compare/t3-code-vs-unstoppable.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/t3-code.json·/api/v1/tools/unstoppable.json - From a terminal
anchor compare t3-code unstoppable(the CLI) - Over MCP
compare_tools {"a": "t3-code", "b": "unstoppable"}at/mcp, no key