SageOx, a Seattle startup building tools for teams where humans and AI coding agents work side by side, has announced $15 million in seed funding. The company launched in January.
The round was led by Canaan Partners, with participation from A.Capital, Pioneer Square Labs and Founders’ Co-op.
SageOx joins a crowded field of companies working to make AI tools more effective in collaborative settings, in this case creating what is essentially institutional knowledge for agentic partners. Its platform captures information from conversations, chats and coding sessions, building a hivemind that is passed along to new AI agents — helping them stay aligned with a project as it evolves.
“As teams begin operating at multiples of their traditional speed, in some cases 20x to 40x faster, their existing processes break down, and the ability to share decisions, intent, and history across humans and agents becomes critical infrastructure,” said Ajit Banerjee, founder and CEO of SageOx, in a statement.
The company said the funding will be used for product development and “a small number of key hires” — work it plans to carry out, true to form, with the help of AI agents.
SageOx was founded by a trio of serial entrepreneurs and tech veterans:
- Banerjee previously founded three startups and held engineering leadership roles at Amazon, Facebook and Apple.
- Chief Product Officer Milkana Brace founded Jargon, which was acquired by Remitly, and was a technology lead at Expedia.
- Chief Technology Officer Ryan Snodgrass was one of Amazon’s first engineers and spent 15 years with the tech giant.
The fourth team member, Galex Yen, joined from Thunk.AI and has worked as an engineer at Apple, Remitly and Microsoft.
Competitors in the space include large companies and fellow startups such as OpenAI Codex, Anthropic Claude Code, Cursor, GitHub Copilot, Windsurf, Blocks, Factory, Tembo, and 20x.
The SageOx platform is already in use by early customers and design partners, and drawing positive feedback.
“As an in-person team, a lot of our best decisions happen in conversation,” said Marius Ciocirlan, CEO at Mark OS. “Before SageOx, our agents weren’t part of that; they felt remote. We had to constantly recap decisions, and things would get lost. Now SageOx keeps them in the loop automatically.”
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