Your ideas. Your building blocks. Your API.
Lemma is an open-source, developer-first, API-first platform for knowledge publishing and structured thought. Think of it as a Substack alternative for builders and researchers—fully programmable, extendable, and composable. Every insight you create can be queried, shared, and built upon.
A lemma is a small, proven statement used in mathematics or logic to support larger proofs. In linguistics, it represents the canonical form of a word.
Why Lemma? Each thought you store is a building block—small, structured, and reusable—ready to power larger ideas, workflows, or services.
We believe publishing and knowledge should be open, programmable, and interoperable.
Lemma externalizes cognition, allowing developers and researchers to turn their insights into APIs, newsletters, blogs, or AI-powered workflows.
Our mission: make thoughts actionable and reusable, not just readable.
- Open by Default – Structured knowledge should be shareable, discoverable, and extendable.
- API-First – Every insight is queryable and usable programmatically.
- Developer-First – Build apps, dashboards, or agents on top of your knowledge.
- Composable Knowledge – Your ideas are infrastructure; everything can be reused and extended.
- Markdown-native editor
- Tags and categories
- Version history
- Full-text search
- REST API
- GraphQL API
- Webhook support
- Programmatic access to all published insights
- Newsletter scheduling (email + web)
- SEO-ready blogs
- Feeds & private drafts
- Extendable publishing pipelines
- Public, private, or gated content
- Fine-grained control over access and visibility
- API-First Design: Every thought is exposed via REST & GraphQL for external use.
- Composable Infrastructure: Build tools, apps, and communities on top of your knowledge.
- Single Source of Truth: Notes, newsletters, blogs, APIs, and collections are fully connected.
| Feature | Substack | Lemma |
|---|---|---|
| Open Source | ❌ | ✅ |
| Developer-Friendly | ❌ | ✅ |
| API Access | ❌ | ✅ |
| Extendable | ❌ | ✅ |
| Structured Knowledge | ❌ | ✅ |
| Composable Publishing | ❌ | ✅ |
Lemma empowers developers and researchers to go beyond newsletters—think structured knowledge + programmable publishing + integration-first mindset.
- Document workflows, APIs, or processes in real time
- Build dashboards or apps on top of structured insights
- Expose knowledge as programmable services
- Publish structured research with full querying capability
- Collaborate, share, and extend others’ ideas
- Track evolution of knowledge over time
- Create structured learning paths
- Expose curricula via APIs
- Build interactive teaching materials
- Publish knowledge as a service
- Let others build on top of your insights
- Go beyond newsletters into programmable knowledge networks
License
MIT License – free and open to use.