withkeystone.com · San Francisco · founded 2025 · team Pablo Hansen (Founder), hiring Founding Product Engineer · YC Summer 2025 batch, active · trust 0/4
| Company Name | Proliferate (fka. Keystone)
source: https://www.ycombinator.com/companies/proliferate |
| Tagline | Manage a team of agents from your desktop
source: https://www.ycombinator.com/companies/proliferate |
| City | San Francisco
source: https://www.ycombinator.com/companies/proliferate |
| Founded | 2025
source: https://www.ycombinator.com/companies/proliferate |
| Team | Pablo Hansen (Founder), hiring Founding Product Engineer
source: https://www.ycombinator.com/companies/proliferate |
| Stage | YC Summer 2025 batch, active
source: https://www.ycombinator.com/companies/proliferate |
| Founders | Pablo Hansen
source: https://www.ycombinator.com/companies/proliferate |
| Entity | Proliferate (formerly Keystone), Y Combinator Summer 2025
source: https://www.ycombinator.com/companies/proliferate |
| Public Contact Email | pablo@proliferate.com
source: https://www.ycombinator.com/companies/proliferate |
| Current Website | https://proliferate.com (formerly withkeystone.com)
source: https://www.ycombinator.com/companies/proliferate |
| What the company does | Open-source platform for building AI agents that can do real end-to-end work at companies. Manages agent fleets locally or in the cloud. Self-hostable, MIT licensed.
source: https://www.ycombinator.com/companies/proliferate |
| Key Products | Self-hostable AI agent platform for on-call triage, flaky test sweeps, mass migrations, and team verification
source: https://www.ycombinator.com/companies/proliferate |
| GitHub Repository | https://github.com/proliferate-ai/proliferate
source: https://www.ycombinator.com/companies/proliferate |
| Clients/Customers | Lovable and unnamed other engineering teams at companies like Stripe, Ramp, Coinbase
source: https://techcrunch.com/2025/09/15/the-9-most-sought-after-startups-from-yc-demo-day/ |
| Founder Age | 20 years old (as of Summer 2025)
source: https://techcrunch.com/2025/09/15/the-9-most-sought-after-startups-from-yc-demo-day/ |
| Founder Education | Master's degree in AI (finished at age 19)
source: https://www.ycombinator.com/companies/proliferate |
| Fundraising | Raised more than $5,000,000 (seed round)
source: https://www.linkedin.com/posts/rubendominguezibar_seeing-european-founders-like-pablo-hansen-activity-7392241434793254912-gkb2 |
| Acquisition Offers | Turned down a seven-figure acquisition offer per TechCrunch; Rubén Domínguez Ibar invested in seed round after 8-figure offer
source: https://techcrunch.com/2025/09/15/the-9-most-sought-after-startups-from-yc-demo-day/ |