Cosine
Codify human reasoning and apply it to hard problems, starting with an autonomous AI software-engineering colleague.
At a Glance
- Software engineering teams
- Regulated industries
- Enterprise software development
AI Tools by Cosine
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Cosine
AI Coding Agent
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Latest News
UK Government backs AI firms pioneering drug discovery and more
Cosine goes from leader to cornerstone of UK sovereign AI strategy
The second wave of AI coding is here
Fine-tuning now available for GPT-4o (Cosine as Launch Partner)
Products & Services
Fully autonomous AI software engineer capable of planning, writing, and testing code.
Hosted AI engineering platform for remote agents and multi-surface integration.
Native desktop application for macOS, Windows, and Linux.
Terminal-native AI pair-programming tool.
Market Position
Leading AI software engineering agent with highest SWE-bench scores, focused on 'human-like' reasoning rather than simple code completion.
Leadership
Founders
Yang Li
Co-founder & CEO/COO. Previously Chief Growth Officer at Ziglu, worked at Luno, and Mobike (acquired for $2.7B). Has 3 exits and experience scaling two unicorns.
Alistair Pullen
Co-founder & CEO/CTO. Studied Computer Science at the University of Exeter. Focuses on autonomous software engineering and human reasoning labs.
Sam Stenner
Co-founder & CTO. Studied Computer Science at the University of Exeter. Specialized in AI development and code generation.
Executive Team
Yang Li
Co-Founder & CEO/COO
Serial entrepreneur with exits in Ziglu, Mobike, and Luno.
Alistair Pullen
Co-Founder & CEO
Computer Science graduate from Exeter, AI engineering expert.
Board of Directors
Founding Story
Started by three friends to push the boundaries of AI reasoning, leading to a Human Reasoning Lab and the development of autonomous developer tools.
Business Model
Revenue Model
SaaS subscription and token-based usage.
Pricing Tiers
Introduced for individual developers in August 2025.
Includes 5M tokens per seat per month.
Includes 60M tokens per seat per month.
VPC, air-gapped, custom model weights, and zero data egress.
Target Markets
- Software engineering teams
- Regulated industries
- Enterprise software development
- Legacy code modernization
- Autonomous backlog management
- Automatic documentation
- Rapid project scaffolding
- Flagg Consulting
- UK Government