AI tool comparison
MarketingSkills vs Pretty Fish
Which one should you ship with? Here is the side-by-side panel verdict, pricing read, reviewer split, and community vote comparison.
Developer Tools
MarketingSkills
44+ marketing skills for Claude Code, Cursor, and AI coding agents
75%
Panel ship
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Community
Paid
Entry
MarketingSkills is an open-source repository of 44+ markdown-based agent skills that give AI coding assistants specialized knowledge across conversion optimization, copywriting, SEO, paid distribution, analytics, and growth engineering. Built by indie developer Corey Haines, the skills plug into any agent that supports the Agent Skills spec — Claude Code, Cursor, Windsurf, OpenAI Codex, and more. Each skill is a structured markdown file that teaches the agent when and how to apply specific marketing frameworks. Skills cover everything from CRO-optimized landing pages and email drip sequences to AI search optimization, referral programs, churn prevention, and pricing strategy. Installation takes seconds via the CLI or Claude Code plugin. What makes this stand out is the intersection of marketing craft and agentic tooling — rather than a generic AI marketing SaaS, MarketingSkills turns your existing coding agent into a growth-aware collaborator that understands when you're working on a conversion flow versus a content calendar and applies the right playbook automatically. The repo hit 24k GitHub stars and is trending hard today.
Developer Tools
Pretty Fish
Free, beautiful Mermaid diagram editor that works offline
75%
Panel ship
—
Community
Free
Entry
Pretty Fish is a free, open-source Mermaid diagram editor with live preview, 5 built-in themes, multi-page workspaces, and one-click SVG/PNG export. It works offline as a Progressive Web App (PWA) and requires no account, no login, and no installation. It supports all 14+ Mermaid diagram types including flowcharts, sequence diagrams, Gantt charts, entity-relationship diagrams, and Git graphs. The editor includes syntax highlighting, auto-completion, instant error feedback, and a clean split-pane layout. The multi-page workspace lets you manage entire diagram projects in a single session. Export quality is excellent — SVG output is clean and scaling-ready for use in presentations, docs, or design systems. Pretty Fish hit Hacker News front page today with 128 points and has the makings of the go-to Mermaid editor for developers who generate diagrams from AI-assisted documentation workflows. With LLMs increasingly generating Mermaid syntax in their outputs, having a polished renderer and editor matters more than ever.
Reviewer scorecard
“Brilliant distribution play — package domain expertise as agent skills and suddenly your coding agent understands CRO best practices. The CLI install and Agent Skills spec compatibility mean you're up in 30 seconds. Already replacing half my Notion marketing runbooks.”
“The official Mermaid live editor is clunky and slow. Pretty Fish loads instantly, works offline, and the multi-page workspace means I can manage all my architecture diagrams in one place. Bookmarking this immediately as my default Mermaid editor.”
“Markdown skills are ultimately prompt engineering in a fancy folder. There's no enforcement mechanism to ensure the agent actually applies them correctly, and marketing advice that worked in 2024 may already be stale. Blind trust in 44 'best practices' without testing is a recipe for cargo-culting.”
“It's a genuinely nice editor but it's solving a niche problem — most devs who need Mermaid diagrams already use VS Code extensions or embed them in Notion. And with no backend, there's no collaboration or sharing story, which limits its use in team workflows.”
“This is the beginning of skill ecosystems as the new SaaS moat. Instead of building apps, domain experts will package expertise as agent skills and sell via marketplaces. MarketingSkills is an early proof of concept for a massive coming wave.”
“As AI tools increasingly output Mermaid syntax to explain architectures and flows, the need for a great rendering environment grows. Pretty Fish positions itself at the intersection of AI-generated diagrams and human editing — that's a well-timed niche.”
“Finally an AI tool that speaks marketer, not just developer. Having an agent that knows punch-up copywriting, kinetic email sequences, and launch playbooks from the same terminal as my code is exactly how solo founders need to operate in 2026.”
“Five beautiful themes and clean SVG exports mean I can finally use Mermaid diagrams in client-facing presentations without them looking like developer scratch notes. This is the Mermaid editor I've always wanted and the zero-friction setup seals it.”
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