YC After Dark by Composio X WorkOS X Hyperspell X Imagine AI
For YC Winter 2026 (current batch), Fall 2025, Summer 2025 founders
*At the Landing Residency Lounge*
3 weeks to Demo Day.
You’re shipping. Rebuilding. Pivoting. Stress-eating. Maybe sleeping. Maybe not.
Before the real chaos hits, come hang out with founders from Composio, WorkOS, Hyperspell, Imagine AI and other hyperscaling AI startups in a chill mixer. No panels. No pitches. No "so what's your ARR?" energy. Just music, drinks, dancing and people who get it.
Come decompress. Step out of sprint mode for a few hours. Talk about anything except your runway (unless you want to).
Low-key. Founder-only. Limited spots.
Our Hosts
Composio enables agents to take actions across 800+ apps. We enable your agents to dynamically call 10,000+ tools. These tools are loaded just in time, preserving context windows and empowering your agents further. Behind the scenes, we handle the reliability and observability of tool calls, including authentication, permissions, retries, and API changes, so agents can safely take actions you can trust.
WorkOS is a developer toolkit that lets you add enterprise features like SSO, SCIM, RBAC, and more without building and maintaining the infrastructure yourself.
Get started or book a demo here.
Hyperspell (YC F25) is the memory and context layer for AI agents. We ingest and index data from systems of record like CRMs, emails, calendars, documents, and messaging tools, and turn it into structured, persistent memory your agents can semantic search across. Instead of fetching one email at a time with tool calls, your agent can search across an entire inbox, Slack history, Notion workspace, and more in a single query.
Imagine AI (YC F25) accelerates LinkedIn content campaign across your entire team without sacrificing authenticity. We've done this for companies from Series A to IPO’d, such as MongoDB and Rippling, by building deep AI personas (100+ pages of context) that write in their voice, think like them, and know how to best position their company.