About CoStartups

CoStartups (costartups.app) is the professional network for founders, engineers, and operators working in artificial intelligence. Members share what they are building, discover collaborators, post to a sector-aware feed, list startups, and hire through a jobs board designed for early-stage teams.

We were built in response to a simple problem: general-purpose professional networks optimise for volume and virality. They are not built for the nuance of AI company building, where context matters more than connection count. CoStartups focuses on signal over noise: real availability status, warm paths through the network, and discovery filtered by sector and stage rather than generic job titles.

• Founders hiring their first team, fundraising at pre-seed or seed, or searching for a technical cofounder. CoStartups surfaces people who are actually open to those conversations, not people who are hypothetically open in theory.
• Engineers and technical operators evaluating early-stage opportunities. The network lets them filter by stage, sector, and stack before reaching out, so every conversation starts with relevant context.
• Operators, advisors, and investors who work across multiple companies in the AI ecosystem and want one place to follow what is being built, share expertise, and make introductions within their network.

CoStartups is a curated network. Profiles are reviewed before they appear in the directory and feed. This is not a gatekeeping mechanism: it exists to keep the network useful. A directory full of inactive accounts, recruiters, and spectators is not useful to a founder trying to hire their first engineer or find a cofounder in LLM infrastructure.

Once a profile is approved, members can post to a sector-aware feed, connect with others, message directly, list a startup on the directory, and post or apply to roles on the jobs board. Everything is designed around the workflows that actually matter in early-stage company building.

Request access or read our manifesto to understand the principles behind the product.

We do not sell member data. We do not use member content to train third-party models. We do not run engagement algorithms optimised for time-on-site. We are a software product funded by the value we create for members, not by monetising their attention or information.

Our privacy practices are governed by UK GDPR. Full details are in our privacy policy. Questions can be directed to hello@costartups.app.

CoStartups is owned and operated by Northbrik Systems LTD (Companies House 17184680), registered in England and Wales. The company builds software products for the startup and venture community.

Registered office: 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ

Website: https://costartups.app