kynetradb
One Rust binary: BM25 search + vector + KV + document + auth + files + realtime + agentic admin.
vs
Supabase
Open-source Firebase alternative built on Postgres with auth, storage, realtime, and edge functions.
Feature comparison
| Dimension | kynetradb | Supabase |
|---|---|---|
| Full-text search | BM25 (parallel, 1.07 ms @ 100k) | trigram |
| Vector search | Brute-force cosine (2.21 ms @ 100k, no HNSW yet) Supabase uses HNSW which scales better past ~100k vectors | HNSW |
| Auth | Built-in (bcrypt + JWT, 3 roles) | Built-in |
| File storage | Built-in (local + S3-compatible, SigV4) | Built-in |
| Realtime | SSE (topic + kind filters) | WebSocket |
| KV lookups | Yes (point lookup by ID) | No |
| Document filter | Yes (JSON predicates) | Yes |
| LLM runtime | Yes (Anthropic + OpenAI + Ollama) | No |
| Outbound DB sync | Yes (12 sinks: Postgres, DynamoDB, BQ, Firestore, CF, Mongo, Redis, Pinecone) | No |
| Self-host | Yes (single binary) | Yes |
| Single binary | Yes | No |
| License | Apache-2.0 | Apache-2.0 |
| Deploy targets | 18 (1-click) | 4 (1-click) |
| Free tier | Yes — Apache-2.0, self-host free | yes — 500 MB database, 1 GB storage |
When to pick Supabase
Mature Postgres + the largest open-Firebase ecosystem. If your team knows SQL and needs relational joins, Supabase wins.
- Your team is SQL-native and needs relational joins.
- Your team is already invested in Supabase's SDK and ecosystem.
When to pick kynetradb
- You need BM25 full-text + vector similarity + auth + files + realtime in one process — no external services.
- You want to deploy to 18 targets (including 5 Indian providers) from one Dockerfile.
- You need outbound sync to 12 databases (Postgres, DynamoDB, BigQuery, Firestore, Cloudflare, MongoDB, Redis, Pinecone) with zero extra code.
- You want an agentic admin with 10 typed LLM-driven actions and a persisted audit trail.
- You want Apache-2.0 with a self-host path that doesn't require an ops team.
- You want a single binary with no runtime dependencies.
Create a record — both APIs side by side
Insert a product record. These are documentation-accurate shapes, not runnable end-to-end examples.
kynetradb
# kynetradb — insert via HTTP
curl -X POST https://your.host/v1/entities \
-H "Authorization: Bearer $KEY" \
-H "Content-Type: application/json" \
-d '{
"kind": "product",
"attrs": {
"title": "Aurora Espresso",
"vendor": "Aurora",
"price": 2200
}
}' Supabase
// Supabase — JavaScript SDK
const { data, error } = await supabase
.from('products')
.insert({ title: 'Aurora Espresso', vendor: 'Aurora', price: 2200 })
.select();