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Symphony
A
Perplexity
S
Figma AI
A
Hex
A
TaglineOpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out.AI search done right. Cited answers, not chat theater.AI features baked into the design tool you already use.Modern data notebook with Magic AI assistant.
CategoryAgentsResearchDesignData
PricingFree (open-source)Free + $20/mo ProIncluded with Figma plansFree + $28+/user/mo
Best forEngineering teams already using Linear + OpenAI Codex who want to stop babysitting agent sessions and instead let the issue tracker drive autonomous coding at scale.Replacing Google for any question where you want a cited answer in seconds.Designers already on Figma.Data teams at startups + enterprises.
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
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • First drafts with Make Designs
  • Rename/rearrange layers automatically
  • Natural language asset search
  • SQL + Python + no-code in one notebook
  • Magic AI writes queries + viz for you
  • Team-grade collaboration
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
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Features vary by plan + region
  • Still rolling out
  • Overkill for casual users
  • Enterprise pricing
Kai's verdictSymphony 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 for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier. No reason not to use it if you're on Figma. Not worth switching for.A-tier for data teams. S-tier if you already live in SQL + Python.
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