Epicenter is an ecosystem of open-source, local-first applications built on a shared memory layer, described as ChatGPT's memory feature in an open, portable format. It stores notes, transcripts, and chat histories in plain text and SQLite files that users own and control. The tools are accessible via text editors, Obsidian, or self-hosted instances. Epicenter was part of Y Combinator's Summer 2025 batch and is based in San Francisco.
Epicenter
ActiveChatGPT's memory feature in an open, portable format
Total raised
$500K
1 round
Stage
Seed
Jan 2025
Team
1-10
since 2025
Pricing
—
Founded
2025
San Francisco, United States
Agent-ready
—
Open-source, local-first ecosystem of applications
Shared, portable memory layer across tools
Stores notes, transcripts, and chat history in user-owned files
Plain text and SQLite storage formats you control
Accessible through standard text editors
Obsidian compatibility for note workflows
Self-hostable instances for full data ownership
Designed as an open alternative to closed AI memory features
12/100
Early
MCP server
Public API
Webhooks
OAuth 2.0
SDKs
No public agent surfaces detected yet.
Jan 2025 Seed $500K ● Y Combinator
Capital network
$500K raised ·1 backer·10 network links
- Backers1
- Shared portfoliocompanies these backers also fund
- Extended networkfunds that co-invest alongside them
Databricks
The data + AI company
AI AgentsAI Infrastructure
xAI
AI designed to understand the universe
AI ChatbotsAI Agents
Mistral AI
Open and efficient foundation models
AI AgentsFoundation Models
Resolve AI
AI SRE for complex production environments
AI AgentsAI Developer Tools
Sierra
Conversational AI agents for every business
AI ChatbotsAI Agents
Cursor
The AI code editor built for productive engineers.
AI CodingAI Agents
- What is Epicenter?
- Epicenter is an open-source, local-first ecosystem built on a shared memory layer, described as ChatGPT's memory feature in an open, portable format.
- Where is my data stored?
- Data is stored in plain text and SQLite files that you own and control, kept locally rather than in a closed third-party service.
- How do I access Epicenter data?
- You can access it through standard text editors, Obsidian, or self-hosted instances.
- Is Epicenter open source?
- Yes. Epicenter is open source and local-first, and was part of Y Combinator's Summer 2025 batch, based in San Francisco.
Discussion
Sign in to join the discussion.
Sign inExplore more around Epicenter
Contextual paths to related AI startups, deals and rankings.