The archive · Developer & Business Tools · Product decision · 2025–2026
Tweeks bets AI userscripts beat agentic browsers: YC W25, HN 351 pts
A YC W25 browser extension rewrites any webpage from plain-English requests; Launch HN drew 351 points, and the site claims 25k+ users and 4M+ pages modified.
Tweeks
What the business is
Tweeks is a browser extension (Chrome, Edge, Firefox and Chromium browsers) that turns plain-English requests into sandboxed userscripts: describe 'hide the sidebar' or 'block suggested videos' and it generates a deterministic page modification that persists and can be shared.
How it started
Jason, who spent years on recommendation systems and relevance at Pinterest, kept hacking page-fixers (login walls, cookie banners) and built a weekend prototype that turned simple requests into page edits; it 'unexpectedly grew into something people kept asking to share,' and the pair joined Y Combinator's W25 batch.
What happened
The Launch HN on November 13, 2025 drew 351 points and 213 comments; founders said they were unsure about monetization and focused on feedback, while commenters debated closed source, permissions and how an anti-enshittification tool owned by a VC-backed startup would play out. The product later added paid plans with higher limits, Tweeks MCP and ChatGPT-subscription integration.
How it ended up
Active as of 2026-09: free tier for browsing and installing public tweeks, paid plans for higher creation limits, and a claim of 4M+ pages modified.
Background
Tweeks is a browser extension that rewrites any webpage from a plain-English request. You describe the change — hide the sidebar, block suggested videos, add a price tracker — and an AI agent plans and generates a sandboxed userscript that runs locally and persists across page loads, with source you can inspect and share.
Co-founder Jason built page-fixers for years and worked on recommendation systems at Pinterest, where he saw well-meaning optimization produce enshittified UX. A weekend prototype that turned simple requests into page edits grew into something people kept asking to share, and Tweeks joined Y Combinator's W25 batch; the Launch HN on November 13, 2025 drew 351 points and 213 comments.
The founders were upfront that monetization was unsolved; commenters debated closed source, permissions and a VC-backed anti-enshittification tool. The product later added paid plans with higher creation limits, Tweeks MCP and ChatGPT-subscription integration, and by September 2026 the homepage claimed 25k+ users, 4k+ public tweeks and 4M+ pages modified.
What has to be true
- It chose the middle of the market — modify the web you already use instead of replacing it with an agentic browser or hand-writing userscripts.
- The core loop is one sentence: describe the annoyance, get a working modification, which is instantly understandable and shareable.
- Making generated scripts inspectable and sandboxed answered the trust objection to AI rewriting pages, a key reason the HN thread engaged constructively.
- The Launch HN thread served as a live requirements session, surfacing monetization, permissions and open-source concerns the product later had to address.
What can be applied
Position against the category's direction: amid agentic browsers, Tweeks bet users want control of the sites they already use — and the Launch HN thread doubled as a product-requirements meeting.
Aftermath
As of 2026-09-02 Tweeks is active with a free tier (browse and install public tweeks, create your own with a free account) and paid plans for higher creates, updates and inference, plus advanced features like Tweeks MCP and using Tweeks with a ChatGPT subscription. The site claims 25k+ people tweeking sites, 4k+ public tweeks and 4M+ pages modified, supports Chrome, Edge, Brave, Opera, Vivaldi, Arc and Firefox, and states SOC 2 compliance. Reforgers lists it as active, YC-backed, founded 2025, team of two.
Sources
- Launch HN: Tweeks (YC W25) – Browser extension to deshittify the web
- Tweeks — YC W25 Launch on Hacker News
- Tweeks.io — Y Combinator startup profile
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