The rating system
Which tech is better suited?
Every project rates how well each technology fits that specific problem (1–5). Read down a column to see the winner for a build; read across a row to see where a technology shines — and where it doesn't.
| Technology | Aurora Commerceecommerce | Helix Assistantai | Tickerrealtime | Catalensvision | Vitalshealth | Concordcollab |
|---|---|---|---|---|---|---|
| Go | 5/5 | 5/5 | 5/5 | 5/5 | 5/5 | 3/5 |
| Rust | — | — | — | — | — | 5/5 |
| TypeScript | — | — | 4/5 | 4/5 | — | 4/5 |
| Python | — | 5/5 | — | — | — | — |
| Kotlin | 4/5 | — | — | — | 5/5 | — |
| PostgreSQL | 5/5 | 4/5 | 4/5 | 2/5 | 4/5 | 4/5 |
| MongoDB | 2/5 | 2/5 | 3/5 | 5/5 | — | — |
| Redis | — | — | 5/5 | — | — | 4/5 |
| Jetpack Compose | 4/5 | — | 4/5 | 4/5 | 4/5 | — |
| SwiftUI | — | — | — | — | 4/5 | — |
| Flutter | — | — | — | — | 3/5 | — |
| Gemini API | 3/5 | 5/5 | 3/5 | 4/5 | 3/5 | 3/5 |
| Google Cloud | 4/5 | 3/5 | 4/5 | 3/5 | 4/5 | 4/5 |
| Cloudflare | — | 4/5 | — | — | — | — |
Best fit, project by project
Aurora Commerce
Spotlight winner: PostgreSQL — 5/5
Transactions + constraints make overselling and money drift structurally impossible.
Helix Assistant
Spotlight winner: Gemini API — 5/5
One API gives you text embeddings, streamed generation, and function calling — the whole RAG loop.
Ticker
Spotlight winner: Redis — 5/5
Streams give append-only ordering, stable ids, and XREAD-from-id replay that pub/sub cannot.
Catalens
Spotlight winner: MongoDB — 5/5
Vector similarity and a metadata pre-filter run in one aggregation over heterogeneous documents.
Vitals
Spotlight winner: Kotlin — 5/5
One correct copy of the hard logic is reused by both native UIs via expect/actual bridges.
Concord
Spotlight winner: Rust — 5/5
Mature CRDT crates (yrs, automerge) and no-GC performance for the merge-heavy hot path.
Scores are editorial and demonstrated by each build — every project makes its spotlight technology load-bearing, so the score is the lesson, not an opinion poll.