{"id":91969,"title":"Stably - Tests Every Code Change Like Your Best Engineer Would","tagline":"AI agent for testing your PRs and releases","body":"**Tl;dr**\n\nWe've built an AI testing agent that lets anyone on your team—engineers, PMs, and QA—create and maintain tests without writing code.\\\n\\\n❌ The Problem / ✅ Our Value\n\nStop shipping bugs. Stop waiting for tests. Stop fixing broken test suites.\n\nStably is an AI QA engineer that understands your product, tests intelligently, and integrates seamlessly into your workflow.\\\nhttps://youtu.be/p-cjcxjTH-E\n\n## 💪 Our 3 Core Strengths\n\n### **1. ⚡ Speed: 10x Faster Testing**\n\n* **Smart test selection:** Our AI analyzes PR diffs and runs only affected tests—when you change checkout, we test checkout, not your entire suite\n* **Automated test creation:** Tests that once took hours of hand-coding in Playwright or Cypress now generate automatically in under 10 minutes.\n* **Intelligent caching:** Tests run in cached Playwright until your app changes, then auto-heal\n\n### 2. 🎯 **Accuracy: AI That Actually Understands Your Product**\n\n* **99.7% assertion accuracy** by learning from your Notion docs, Google Drive specs, PostHog recordings, and Git history\n* **Context-aware testing:** Tell Stably \"test checkout with expired coupons\" in plain English—it knows what checkout means in YOUR app\n* **Catches real bugs:** Not just UI changes, but actual business logic failures\n\n### 3. 🧩 **Easy Integration: Works for Everyone, Everywhere**\n\n* **No-code for all teams:** PMs describe tests in English, QAs point-and-click to show flows, and engineers get PR-ready tests\n* **One-click GitHub app** or use our API for GitLab, local CLI, and Cursor MCP (upcoming)\n* **Human-in-the-loop:** When AI needs help, anyone can step in and show it what to do—no coding required\n\n## 💥 Real Impact\n\n* [**OpenArt**](https://openart.ai/) scaled from $0 to $16M ARR with just 10 employees using Stably\n* [**Tofu**](https://tofuhq.com) saves 40+ engineering hours per week after migrating from Playwright\n* Multiple customers replaced six-figure QA contracts, cutting testing costs by 80%\n\n\u003e \"I actually love testing now after switching to Stably\" — Senior Engineer, Curebase (YC W18)\n\n## 👩🏻‍💻🧑‍💻 About Us\n\n[**Jinjing**](https://www.linkedin.com/in/jinjingliang/) (CEO): Built the testing \u0026 release infrastructure that ships Google Chrome to billions of users\n\n[**Neil**](https://www.linkedin.com/in/neilwilliamparker/) (CTO): One of Uber's youngest Tech Leads; led multiple large-scale ML projects on Uber's Safety team\n\nWe've assembled a team of PhD graduates specializing in AI’s application in software reliability, plus ex-founders who've previously built and sold an AI startup.\n\n## 🎉 Launch Week Special\n\n**We're looking for teams who:**\n\n* Wait too long for PR tests to run\n* Have PMs/QAs who want to contribute to testing but can't code\n* Are tired of updating tests every time they ship\n\n**Get the first month free on our starter plan. Just mention \"YC Launch\" when signing up.**\n\nSign up or schedule a demo at [stably.ai](https://www.stably.ai/?utm_source=launch-yc\u0026utm_medium=link\u0026utm_campaign=launch-yc-07-2025\u0026utm_id=launch-yc-07-2025) or contact us at [jinjing@stably.ai](https://mailto:jinjing@stably.ai)","slug":"NvN-stably-tests-every-code-change-like-your-best-engineer-would","created_at":"2025-07-09T02:42:30.339Z","updated_at":"2026-05-24T16:00:43.291Z","total_vote_count":336,"url":"https://www.ycombinator.com/launches/NvN-stably-tests-every-code-change-like-your-best-engineer-would","share_image_url":"//bookface-static.ycombinator.com/assets/ycdc/yc-og-image-c440a0ad1dacfb86eeeb343717479cc54d256614449b4ef719977a0a451f8bc8.png","company":{"id":25342,"name":"Stably AI","slug":"stably-ai","url":"https://www.stably.ai","logo":"https://bookface-images.s3.amazonaws.com/small_logos/7522b24d3853d0b79cebe72798f4a3a33c54ac27.png","batch":"Winter 2022","industry":"B2B","tags":["Developer Tools","SaaS","DevOps","Web Development","AI"],"search_path":"https://bookface.ycombinator.com/company/25342"}}