Compare AI tools

	Symphony A	Elicit S	GitHub Copilot B	Fathom 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.	AI research assistant for academic literature.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Meeting notes, free forever for individuals.
Category	Agents	Research	Coding	Meetings
Pricing	Free (open-source)	Free + $12-$42/mo	Free (limited) + $10/mo Pro + $19/mo Business	Free for individuals + $15-$29/user/mo teams
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.	Grad students, researchers, anyone doing literature reviews.	Teams with GitHub already. Devs who don't want to change IDEs.	Solo operators, freelancers, small teams on a budget.
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	Searches 125M+ papers Extracts + synthesizes findings across papers Systematic review workflow	Great enterprise story Works in your existing IDE Chat + autocomplete	Unlimited free tier for solo use Strong summaries + action items Works in Zoom, Meet, Teams
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	Academic-only Can hallucinate citations — verify everything	Less agentic than Cursor/Claude Code Model quality varies	Bot-joining model Team features gated
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 for academic research. Nothing else comes close for systematic reviews.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	S-tier for solo + free. The best free option, hands down.
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