Promptless

active

AI-powered documentation automation (YC W25). Monitors PRs, tickets, and Slack to auto-draft doc updates. Solves 'doc drift' — the gap between code changes and documentation. Named customers: Vellum, Vitess, Amplitude.

Score 38

Where it wins

Unique positioning — only tool focused on automated doc drift prevention

YC W25 backing

107pts Launch HN — strong reception for a new product

Named customers: Vellum (50%+ docs PRs), Vitess (94% doc updates), Amplitude

Monitors PRs/tickets/Slack and auto-drafts doc updates

Where to be skeptical

All traction numbers are self-reported — no independent verification

Pre-seed funding, team of 5 — early-stage risk

Premium pricing: $500/mo (Startup) → $1,000/mo (Growth)

No open-source product to verify

1.0 launch had lower HN engagement (35pts vs 107pts initial)

Editorial verdict

The only tool focused on keeping docs in sync with code changes automatically. YC W25 backed. 107pts Launch HN. Named customers (Vellum, Vitess, Amplitude) but all traction is self-reported. Premium pricing ($500-1,000/mo). Team of 5. Early-stage risk is high but positioning is unique.

Source

Found via SkillPack? ★ Star us on GitHub

Videos

Reviews, tutorials, and comparisons from the community.

Launch HN: Promptless

Promptless·2025-02-18

Documentation

#09of 12

Teams where doc drift is the #1 pain — the only tool that auto-drafts doc updates from PRs/tickets/Slack

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Astro Starlight

Astro-based docs framework shipping zero client-side JS by default. Go-compiled dev server, multi-framework component support (React, Svelte, Vue, Solid). The DX leader for content-first documentation.

Public evidence

strong2025-02-18

Launch HN — strong reception

Strong reception for a brand-new product. Interest from ReadMe and Mintlify reps in comments. 'Very needed!' — platform team devs.

107 points, 61 commentsHN community + founders

moderate2025-2026

Customer traction claims (self-reported)

Vellum: 50%+ of docs PRs from Promptless. Vitess: 94% of doc updates. Amplitude: tech writers use it for every release. Impressive if verified.

Official documentationPromptless (selfReported: true)

moderate2026-02

Show HN 1.0 — lower but continued engagement

Product evolution but diminished HN excitement. 'Notifications about outdated docs were the highest-value feature' — technical writer.

35 points, 7 commentsHN community

Raw GitHub source

GitHub README could not be fetched right now.