// Feature comparison
How Twill compares to other AI coding agents
A side-by-side look at how Twill stacks up against other autonomous coding agents on the capabilities that matter once an agent leaves the editor: native harnesses, sandbox sizing, BYOK, model routing, warm dev environments, and PR handoff.
SupportedLimitedNot available
| Feature | Twill | Cursor | Devin |
|---|---|---|---|
| Native agent harness | Runs Claude Code, Codex, and OpenCode in their real CLIs | Cursor's custom harness only | Devin's custom harness only |
| Sandbox sizing | Presets and custom sizing available | Fixed default VM | One workspace-level size setting (disk, RAM, CPU) |
| Bring your own key | Anthropic, OpenAI, Google AI, OpenRouter, sent direct to the provider | Keys still route through Cursor; Tab and Apply use built-in models | No bring-your-own-key option |
| Model routing | Save model + mode + effort presets, invoke per task with a /command to control cost | Auto picks a cost-balanced model; no saved invokable presets | Adaptive auto-router; no saved invokable presets |
| Warm dev env | Long-lived sandbox forked per task; deps and processes already running | Environment rebuilt from setup commands or Dockerfile each run | Pre-built org snapshot with dependencies already installed |
| AI onboarding | Agent explores the repo and writes its own setup, no manual entrypoint | Manual: you write the environment entrypoint yourself | Manual: you run the install and setup commands yourself |
| Multi-repo | All connected repos in one shared workspace | Multi-repo environments with coordinated PRs | Repos cloned into the org snapshot |
| Live preview | Public preview URL per port, plus SSH into the sandbox | Remote desktop takeover of the agent VM | Embedded IDE, shell, browser, and desktop |
| Automations | Cron plus integration-aware orchestrator agents | Scheduled and event triggers across integrations | Event triggers, schedules, and Playbooks |
| Unlimited seats | Unlimited users on every plan | Per-seat pricing on Teams plans | Single-user paid tiers; per-seat on Teams |
Based on public product documentation available on June 29, 2026, plus Twill's public docs and implementation in this repository. When a vendor does not publish a comparable capability, the table marks it as not available rather than inferring it.