nisshi-io/nisshi
Apache Kafka® compatible broker with S3, PostgreSQL, SQLite, Apache Iceberg and Delta Lake observed · 2026-08-28
Health v2 · maintenance only
88/100
- Activity 99
- Release rhythm 95
- Longevity 53
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: 5
- age_days: 742
- days_rel: 33
- days_push: 7
- n_releases_24m: 28
Adoption not part of the score
1851 stars · 76 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Nisshi is a stateless, Kafka API-compatible message broker written in async Rust with pluggable storage engines (PostgreSQL, SQLite/libSQL, S3, or memory). It includes an embedded schema registry (Avro, JSON Schema, Protobuf) and can write schema-backed topics as Apache Iceberg or Delta Lake tables.
Use cases
- run a kafka-compatible message broker without zookeeper or raft consensus
- store kafka topic data in s3 or postgresql instead of replicated broker storage
- validate avro, json, or protobuf messages against schemas at produce time
- stream kafka topics into apache iceberg or delta lake tables
- spin up an ephemeral in-memory kafka broker for testing
- migrate off apache kafka without rewriting kafka clients
When to choose
- you want kafka API compatibility with cheaper, simpler durability via S3 or PostgreSQL
- you need schema validation and a schema registry built into the broker
- you want topic data landing directly in Iceberg or Delta Lake for analytics
- you prefer a single statically linked binary with no cluster coordination overhead
When to avoid
- you need battle-tested, large-scale Kafka ecosystem features like Kafka Connect, Streams, or tiered storage parity
- you require broker-side replication semantics and in-sync replicas for strict durability guarantees
- your tooling depends on Kafka-specific protocols beyond the core client API
- you need a mature project - it is relatively young with a small download base
Facets
service · maturity active
message-queue streaming serialization database object-storage cli proxy big-data databases developer-tools self-hosted rust self-hosted cloud kafka-compatible apache-iceberg delta-lake schema-registry avro protobuf s3-storage stateless-broker parquet apache-arrow messaging data-engineering linux macos docker
10 sources
- readme: https://github.com/nisshi-io/nisshi · fetched 2026-08-28 · 6355914491b4
- homepage: https://docs.nisshi.io · fetched 2026-08-29 · 5f169f30bc02
- site_page: https://docs.nisshi.io/docs/features · fetched 2026-08-29 · 4244827e0b5a
- site_page: https://docs.nisshi.io/docs/installation · fetched 2026-08-29 · e7dee960755c
- site_page: https://docs.nisshi.io/docs/build · fetched 2026-08-29 · 3d44a082b002
- site_page: https://docs.nisshi.io/docs/storage-engine · fetched 2026-08-29 · e6da70f2fcc1
- site_page: https://docs.nisshi.io/docs/stateless-brokers · fetched 2026-08-29 · c2df48566fec
- site_page: https://docs.nisshi.io/docs/schema-registry · fetched 2026-08-29 · ec3a1c052993
- site_page: https://docs.nisshi.io/docs/data-lake · fetched 2026-08-29 · a5939973d3f1
- site_page: https://docs.nisshi.io/docs/storage-engine-memory · fetched 2026-08-29 · 8b2791767509
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| nisshi-io/nisshi | main | 88 |
For agents
markdown · JSON · MCP: product_card(name="nisshi-io/nisshi")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem