Compare AI tools

	Replicate S	Symphony A	Lex A	Figma AI A
Tagline	Run any open-source AI model with an API call.	OpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out.	Google Docs with an AI collaborator baked in.	AI features baked into the design tool you already use.
Category	Dev Platform	Agents	Writing	Design
Pricing	Pay per second of compute	Free (open-source)	Free + $12/mo	Included with Figma plans
Best for	Developers using open-source models (Flux, SDXL, Whisper, etc).	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.	Essays, long-form drafts, thinking on the page.	Designers already on Figma.
Strengths	Tens of thousands of models (image, video, audio, LLMs) One-line API for any model Cog framework for custom model deploy	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	Clean writing UX — distraction-free +++ prompt triggers AI help Collaboration + AI feedback together	First drafts with Make Designs Rename/rearrange layers automatically Natural language asset search
Weaknesses	Cold starts on less-popular models Pricing gets real at scale	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 feature-rich than Google Docs AI ceiling below dedicated tools	Features vary by plan + region Still rolling out
Kai's verdict	S-tier for open-source model APIs. The default in this space.	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.)	A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.	A-tier. No reason not to use it if you're on Figma. Not worth switching for.
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