Compare AI tools

	Symphony A	GitHub Copilot B	Manus S	Claude S
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.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Autonomous AI agent that actually finishes tasks.	Anthropic's flagship — best reasoning + longest useful context.
Category	Agents	Coding	Agents	Chatbots
Pricing	Free (open-source)	Free (limited) + $10/mo Pro + $19/mo Business	Free tier + $39-$199/mo	Free + $20/mo Pro + team/enterprise
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.	Teams with GitHub already. Devs who don't want to change IDEs.	People who want to hand off tasks entirely — trip planning, research, spreadsheet building.	Long writing, code, careful thinking, documents over 50 pages.
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	Great enterprise story Works in your existing IDE Chat + autocomplete	General-purpose agent — research, book, build, analyze Parallel task execution Web browsing + file creation + coding	Best-in-class writing + nuanced reasoning 1M context on Opus Artifacts for code/docs Lowest hallucination rate in my testing
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	Less agentic than Cursor/Claude Code Model quality varies	Still hit-or-miss on complex multi-hour tasks Can burn credits fast	Image generation is weak No native web search on all tiers
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. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	S-tier in the agent category. The first one I'd give to a non-technical friend.	S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.
Link	Open →	Open →	Open →	Open →