San Francisco, April 11, 2026 (CSN) -- Twill.ai, a Y Combinator S25 startup, launched cloud-based AI agents on Hacker News to automate code reviews and generate pull requests.
Founder Elena Vasquez stated developers delegate tasks through a web interface. Agents scan GitHub repositories for bugs, optimizations, and style issues, according to Twill.ai documentation released April 11.
Twill.ai Platform Details
Twill.ai deploys agents on Amazon Web Services infrastructure. The system uses large language models such as OpenAI's GPT-4o and Anthropic's Claude 3.5 Sonnet, per company documentation.
Agents follow a multi-step process. They parse codebases, identify issues, generate diffs, and create pull requests with explanations and commit messages. Vasquez detailed this workflow in her Hacker News launch post.
Beta testers from five engineering teams completed integrations in under 10 minutes, Twill.ai reported on April 11. Vasquez wrote on Hacker News: "Engineers spend 20 hours weekly on reviews. Our agents reclaim that time."
Vasquez claimed the platform reduces review cycles by 70%, based on internal tests, she posted on Hacker News.
Y Combinator Backing
Y Combinator provided Twill.ai with $500,000 during its Summer 2025 batch, matching standard Demo Day terms outlined in YC's investment agreement. YC partner Garry Tan posted on X on April 11: "AI agents will transform dev workflows."
Co-founders include Vasquez, a former Google software engineer with five years on search infrastructure, and CTO Raj Patel, ex-OpenAI AI infrastructure lead who scaled model training clusters. The eight-person team emerged from 424 companies in YC's S25 batch, per the YC company directory updated April 2025.
Team members also include three ex-Meta engineers specializing in Rust tooling, according to Twill.ai's website.
Developer Productivity Trends
GitHub's 2025 State of the Octoverse report documented code reviews consuming 19% of developer time across 100 million repositories. Developers logged 2.5 billion hours on reviews in 2025, the report stated.
Twill.ai pricing starts at $29 per month for 100 agent hours. Enterprise tiers scale to unlimited usage at $499 per developer monthly, per the pricing page launched April 11.
Early users on Hacker News reported fixes for memory leaks and SQL injection risks. Twill.ai recorded 500 signups by noon PDT on launch day, Vasquez posted. The Hacker News thread amassed 300 comments with an average score of 120 points.
Competitors
Twill.ai competes with GitHub Copilot, which offers inline code suggestions, and Amazon CodeWhisperer, focused on AWS integrations. Twill.ai differentiates through cloud-based pull request generation.
Users customize agent rules via YAML files and must approve all changes manually. No autonomous merges occur, Vasquez emphasized.
Security Features
Twill.ai runs agents in isolated sandboxes with full audit trails for every analysis. The company pursues SOC 2 Type II compliance, with audits scheduled for Q3 2026, per documentation.
Supported languages include Python, JavaScript/TypeScript, and Rust. Twill.ai fine-tuned models on 10,000 public GitHub repositories, excluding proprietary code.
Integrations connect via webhooks to GitHub, GitLab, and Bitbucket. API access enables custom workflows, the documentation notes.
Twill.ai Funding and Market Outlook
AI developer tools attracted $2.1 billion in venture funding in 2025, up 45% from 2024, according to PitchBook data released March 2026. Twill.ai plans a $10 million seed round at a $50 million pre-money valuation, Vasquez disclosed on Hacker News.
Forrester Research's 2026 Developer Productivity Report predicts automation will shift junior developers toward agent feedback loops, freeing seniors for architecture. Twill.ai reported 40% error reduction in internal benchmarks; third-party audits remain pending.
Version 2.0 will introduce multi-agent collaboration by June 2026, Vasquez announced. Statista forecasts the global software development tools market reaching $500 billion by 2030, growing at 12% CAGR.
Twill.ai positions its agents to capture share in this expansion amid surging demand for AI-assisted workflows.
Jasper Vance, Senior Correspondent, CSN News
