StartupY Combinator (W26)
Skillsync
Searches past sessions across coding agents, so skills and memories are not locked into one provider.
Skillsync started from a lock-in complaint: "We get locked into a single provider and their agent as we invest in skills and memories over time." It launched in September 2026 to make sessions portable across coding agents, and its site now leads with fast search over past sessions across agents ("search so fast it feels like memory"). Y Combinator W26.
Neighbours in the directory
Berkeley, CA · Est. 2024
Stateful agents with memory, from the team behind MemGPT.
Letta (formerly MemGPT, out of UC Berkeley) builds an agent server with built-in memory, context management and state — letting agents persist, learn and be edited like files rather than living in a chat window.
$10M seed led by Felicis (2024)
San Francisco, CA · Est. 2023
The integration layer: hundreds of managed tools your agents can call.
Composio handles auth, schemas, observability and reliability for the external SaaS tools an agent uses — 'plumbing for agentic actions' across Slack, GitHub, Salesforce and 250+ other surfaces.
Est. 2024
A registry and toolchain for MCP servers.
Smithery indexes and helps deploy MCP (Model Context Protocol) servers — a distribution layer for the tool ecosystem agents connect to.
Sources
Verified Oct 29, 2026