vellum.nvim
Live, beautiful GitHub-markdown preview beside your buffer in Neovim — mermaid diagrams as real images, in the terminal.
Details
- External ID
- 1382130643
- Source
- GITHUB
- Company
- —
- Product
- vellum.nvim
- Website domain
- github.com
- Launched
- Sept. 22, 2026
- Cohort
- —
- Upvotes
- 79
- Upvotes percentile
- 0.8985395849346657
- Tags
- —
- Fetched at
- Sept. 26, 2026, 10:54 p.m.
- Updated at
- Sept. 26, 2026, 10:54 p.m.
Enrichment
- Theme
- markdown editors and writing tools
- Vertical
- Horizontal
- Function
- Dev tools
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- live markdown preview plugin for neovim
- Manually corrected
- False
Could you build this?
Partial Writing a basic Neovim plugin in Lua is easy, but rendering live terminal-based graphics (like Mermaid diagrams) requires tricky integration with terminal graphics protocols (Kitty, Sixel, Überzug) and external rendering pipelines.
What it would actually take: The plugin needs a Lua codebase interacting with Neovim's buffer API, coupled with a headless renderer (e.g., mermaid-cli/Playwright or Rust-based SVG rasterizer) and support for terminal graphics protocols like Kitty graphics protocol or Sixel. Handling real-time debouncing, window splits, buffer synchronization, and cross-terminal graphics quirks requires specific systems-level CLI and terminal emulator experience.
Competitors
Other products that read as similar to this one — 63 launches clear the similarity bar, closest 8 shown.
Attention rank: #10 of 64 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 292 days after the earliest competitor.
- nice-mermaid.nvim · github · 2026-09-20 · 34 upvotes · similarity 0.60
- beside.nvim · github · 2026-09-26 · 20 upvotes · similarity 0.53
- Visimer · hn · 2026-08-17 · 17 upvotes · similarity 0.49
- Vellum, the best diagram editor you'll ever use · hn · 2026-09-21 · 25 upvotes · similarity 0.45
- Vloam Mermaid · ph · 2026-09-15 · 1 upvotes · similarity 0.44
- FlowPeek · ph · 2026-09-11 · 2 upvotes · similarity 0.43
- Ferrite · hn · 2026-01-11 · 241 upvotes · similarity 0.43
- vellum-editor · github · 2026-09-21 · 8 upvotes · similarity 0.42
Other launches for this product
- No other launches for this product.
Same idea, different domain
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