| SU-0223 | Interdisciplinary team founding a social-impact and networking startup seeks a co-founderOpen role · Aschaffenburg, Germany | Social impact · Idea | — | — | Oct 2026 | New |
| SU-0417 | AI training and evaluation project with working technology seeks a trustworthy co-founderOpen role · Japan | AI · Prototype | — | — | Oct 2026 | New |
| SU-0365 | Privacy-focused, provider-agnostic AI email assistant on MCP; solo founder offers 50/50 equity to a co-founderOpen role · London, United Kingdom | AI, SaaS & B2B software · Live product or beta | Equity only | — | Sep 2026 | New |
| SU-0364 | Managed cloud for running coding agents (Claude Code, Codex) via API; founder seeks a cofounder in SF or NYOpen role · San Francisco or New York, United States | Developer tools, AI · Live product or beta | — | — | Sep 2026 | New |
| SU-0363 | Piston-less V8 engine architecture concept seeks a co-founderOpen role · Location not stated | Mobility & logistics, Deep tech · Idea | — | — | Aug 2026 | Recent |
| SU-0362 | Legal-tech startup looking for a co-founderOpen role · Location not stated | Legal & public sector | — | — | Aug 2026 | Recent |
| SU-0360 | Show HN post seeking a co-founder, engineer or video editor in San FranciscoOpen role · San Francisco | — | — | — | Aug 2026 | Recent |
| SU-0358 | Operator of a five-year-old local business with a scaling system seeks a co-founderOpen role · Location not stated | — | — | — | Jul 2026 | Recent |
| SU-0356 | Deterministic natural-language runtime without LLMs, seven years solo, seeks co-founder or small angelOpen role · Location not stated | AI, Developer tools · Prototype | — | — | May 2026 | Recent |
| SU-0411 | Founder with positive-impact ideas looks for a complementary co-founderOpen role · Munich, Germany | Social impact · Idea | — | — | May 2026 | Recent |
| SU-0355 | Platform for structured natural-language DSLs linking non-technical users, LLMs and deterministic logicOpen role · Location not stated | Developer tools, AI · Prototype | — | — | Mar 2026 | Recent |
| SU-0354 | Platform for sharing and collaborating on ML and bio research, like Hugging Face for academic researchOpen role · Location not stated | AI, Biotech & life sciences | — | Remote | Mar 2026 | Recent |
| SU-0352 | Vibecoding platform recruiting a co-founderOpen role · Location not stated | Developer tools, AI | — | — | Oct 2025 | Older |
| SU-0351 | First apps marketplace for consumer robots seeks a co-founderOpen role · Location not stated | Hardware, robotics & IoT, Marketplaces | — | — | Sep 2025 | Older |
| SU-0350 | Fintech platform unifying global markets with terminal-grade analytics and AI seeks a co-founderOpen role · Location not stated | Fintech, AI | — | — | Aug 2025 | Older |
| SU-0349 | Reusable orbital spacecraft that retrieves payloads and returns them to Earth, seeks partnersOpen role · Location not stated | Deep tech · Idea | — | — | Aug 2025 | Older |
| SU-0348 | YouTube learning tool with AI insights, learning paths and token rewardsOpen role · Location not stated | Education, Consumer & social, AI · Live product or beta | — | — | Jun 2025 | Older |
| SU-0347 | Weekend-built tool for a niche problem in the blue-collar industry, three users so farOpen role · Location not stated | Live product or beta | — | — | Jun 2025 | Older |
| SU-0380 | Computer-use tool for legacy software without APIs, spun out of a company builder, seeks co-foundersOpen role · Munich, Germany | AI, Developer tools | Full-time | — | Apr 2025 | Older |
| SU-0346 | LAN gaming app for safer and faster multiplayer connectionsOpen role · Location not stated | Gaming | — | — | Feb 2025 | Older |
| SU-0345 | Job board that vets employers for legitimacy and charges candidates for accessOpen role · Location not stated | HR & future of work, Consumer & social · Idea | — | — | Oct 2024 | Older |
| SU-0338 | Scheme and GPT tooling projects (autograd, code completion, assembly-to-source) seek co-foundersOpen role · Location not stated | AI, Developer tools | — | — | Jan 2024 | Older |
| SU-0337 | Low-cost fiber ISP with per-home switching, veteran ISP founder seeks a co-founderOpen role · Location not stated | Consumer & social · Idea | — | — | Jan 2024 | Older |
| SU-0336 | Search engine for saved bookmarks across social platforms seeks co-founders in MumbaiOpen role · Mumbai, India | Consumer & social | — | — | Jan 2024 | Older |
| SU-0335 | Writing company focused on horror novels seeks a co-founderOpen role · Location not stated | Media & creators | — | — | Jan 2024 | Older |
| SU-0334 | Low-cost hybrid tower and fiber consumer ISP, founder seeks a partnerOpen role · Location not stated | Consumer & social · Idea | — | — | Jan 2024 | Older |
| SU-0513 | Open-source middleware for measuring whether AI acts honestly on a user's behalf seeks a co-founder and grant fundingOpen role · Location not stated | AI, Cybersecurity · Prototype | — | — | — | Undated |
| SU-0510 | Hackathon-born tool that turns screen-share demos into AI-tutored skills seeks co-foundersOpen role · Location not stated | Education, AI · Prototype | — | — | — | Undated |
| SU-0421 | Phone-native blockchain built in Termux seeks a co-founderOpen role · Location not stated | Crypto & web3 | — | — | — | Undated |
| SU-0418 | Early cyber-risk quantification platform seeks a co-founder to build the company from the ground upOpen role · Location not stated | Cybersecurity, SaaS & B2B software · Prototype | — | — | — | Undated |
| SU-0412 | AI API marketplace with a buy/sell margin model seeks co-foundersOpen role · Location not stated | AI, Marketplaces | — | — | — | Undated |