Compare AI tools

	Symphony A	Galileo AI B	GitHub Copilot B	ChatGPT Operator B
Tagline	OpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out.	Prompt to UI design. Figma-ready outputs.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	OpenAI's browser agent. Clicks and types on websites for you.
Category	Agents	Design	Coding	Agents
Pricing	Free (open-source)	Free trial + paid plans	Free (limited) + $10/mo Pro + $19/mo Business	Included with ChatGPT Pro $200/mo
Best for	Engineering teams already using Linear + OpenAI Codex who want to stop babysitting agent sessions and instead let the issue tracker drive autonomous coding at scale.	Designers brainstorming first drafts.	Teams with GitHub already. Devs who don't want to change IDEs.	Power users willing to pay $200/mo for a browser bot.
Strengths	Fully autonomous ticket-to-PR pipeline: every open Linear issue gets its own isolated Codex agent without manual supervision Fault-tolerant Elixir/OTP architecture automatically restarts crashed agents and manages hundreds of concurrent runs WORKFLOW.md keeps all orchestration policy version-controlled inside the repo, so agent behavior is reproducible and reviewable like code Proven internal results: OpenAI reported a 500% increase in landed PRs on some teams within three weeks Open spec encourages community re-implementations in any language, not just Elixir	Prompt-to-UI with real layouts Exports to Figma Faster than hand-designing from scratch	Great enterprise story Works in your existing IDE Chat + autocomplete	Actually uses websites — fills forms, clicks, checks out Built into ChatGPT Good for repetitive web tasks
Weaknesses	Currently only supports Linear as an issue tracker — GitHub Issues and Jira integrations are not yet official Only OpenAI Codex is officially supported as the agent runtime; other model integrations are community-contributed and incomplete Self-hosted, Elixir-dependent engineering preview with no built-in sandboxing — not suitable for untrusted or production environments out of the box	Output needs designer polish Pricing unclear / changes often	Less agentic than Cursor/Claude Code Model quality varies	Slow vs doing it yourself Breaks on complex auth flows $200/mo gate
Kai's verdict	Symphony is the most architecturally serious 'issue tracker as control plane' approach yet — 15K GitHub stars in weeks confirms the idea resonates — but it's still a rough, self-hosted engineering preview that demands Elixir chops and a Linear-only workflow. (Verdict pending Phi's full review.)	B-tier. Useful for first drafts. v0 is the better bet for shipping code.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	B-tier. Still early. Manus is more flexible for less money.
Link	Open →	Open →	Open →	Open →