Compare AI tools

	Symphony A	Suno S	GitHub Copilot B	Copy.ai A
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 full song with vocals, instruments, the works.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	AI GTM platform. Workflows for sales + marketing ops.
Category	Agents	Audio	Coding	Marketing
Pricing	Free (open-source)	Free + $10/mo + $30/mo	Free (limited) + $10/mo Pro + $19/mo Business	Free + $49-$249/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.	Jingles, intros, demos, sketches, personal use.	Teams with GitHub already. Devs who don't want to change IDEs.	RevOps + marketing ops automating repetitive tasks.
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	Real songs with real lyrics v4 is very good Quick turnaround	Great enterprise story Works in your existing IDE Chat + autocomplete	Workflow builder for GTM automations CRM enrichment + outbound sequences Scales better than ad-hoc prompts
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	Copyright gray zone Audio quality behind studio	Less agentic than Cursor/Claude Code Model quality varies	Overlaps with general chatbots Workflow setup takes time
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.)	S-tier in its category. The first AI music tool I'd actually listen to.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	A-tier for ops automation. B-tier for simple copy (use Claude).
Link	Open →	Open →	Open →	Open →