Dev tools · alternatives · 2026

24 alternatives to Kaskada – modern, open-source event processing

We recently open-sourced Kaskada – an event-processing engine built on Rust and Apache Arrow. It features a high-level, declarative query language designed specifically for reasoning about events in bulk and in real time. Unlike SQL, an aggregation over events produces a timeline indicating the value at each point in time over the events that have occurred up to that point in time. The query language provides composable, expression oriented syntax, including the ability to nest aggregations. Due to the focus on events and temporal queries, it provides capabilities to shift events forward…

Kaskada is an open-source event-processing engine built with Rust and Apache Arrow. It provides a declarative query language designed for analyzing events in both bulk and real-time contexts. Unlike SQL, aggregations… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Kaskada – modern, open-source event processing launched in 2023; newer entries below may have overtaken it.

1
Kaskade – A text user interface for Kafka▲164
kaskade is a text user interface for kafka, which allows you to interact and consume topics from your terminal in style! - sauljabin/kaskade
2024 · github.com · its alternatives →
2
Coerce – Actor runtime for Rust using async/await and tokio channels▲155
Actor runtime and distributed systems framework for Rust - LeonHartley/Coerce-rs
2019 · github.com · its alternatives →
3
Typed-arrow – compile‑time Arrow schemas for Rust▲48
Hi community, we just released https://github.com/tonbo-io/typed-arrow. When working with arrow-rs, we noticed that schemas are declared at runtime. This often leads to runtime errors and makes development less safe. typed-arrow takes a different approach: - Schemas are declared at compile time with Rust’s type system. - This eliminates runtime schema errors. - And introduces no runtime overhead — everything is checked and generated by the compiler. If you’ve run into Arrow runtime schema issues, and your schema is stable (not defined or switched at runtime), this project…
2025 · github.com · its alternatives →
4
Reindeer▲355
Cursor for databases
Nov 2025 · tryreindeer.com · its alternatives →
5
HelixDB – Open-source vector-graph database for AI applications (Rust)▲237
Hey HN, we want to share HelixDB (https://github.com/HelixDB/helix-db/), a project a college friend and I are working on. It’s a new database that natively intertwines graph and vector types, without sacrificing performance. It’s written in Rust and our initial focus is on supporting RAG. Here’s a video runthrough: https://screen.studio/share/szgQu3yq. Why a hybrid? Vector databases are useful for similarity queries, while graph databases are useful for relationship queries. Each stores data in a way that’s best for its main type of query (e.g.…
2025 · github.com · its alternatives →
6
EventQL – Open-source distributed SQL analytics database in C++11▲90
Distributed "massively parallel" SQL query engine. Contribute to eventql/eventql development by creating an account on GitHub.
2016 · github.com · its alternatives →
7
Light implementation of Event Sourcing using PostgreSQL as event store▲231
Hi everyone, If you have a Java Spring Boot application with a PostgreSQL database, you can implement Event Sourcing without introducing new specialized databases or frameworks. If you have an application dealing with an entity called Order, you should adopt Event Sourcing to keep track of all changes, and know how the Order got into the current state. Event Sourcing gives you: 1. the true history of the system (audit and traceability), 2. the ability to put the system in any prior state (debugging), 3. the ability to create read projections from events as needed to respond to new demands.…
2023 · github.com · its alternatives →
8
UI for Apache Kafka▲158
Open-Source Web UI for Apache Kafka Management. Contribute to provectus/kafka-ui development by creating an account on GitHub.
2021 · github.com · its alternatives →
9OO
Objectiv – Open-source product analytics infrastructure▲88
Hi! One of the creators here. Very proud to finally be able to show you what we've been working on for over a year now. Curious to hear your thoughts! Objectiv is open-source (APLv2) product analytics infrastructure. It's built around a generic but strict event taxonomy, open/common data- and infra tools (currently PG, snowplow, working on bigquery with more to come), and the analyses are done using our pandas-like, SQL speaking modeling library called Bach. As a result, we’re moving towards a vision wherein models can be shared openly, independent of product, platform[1] or data…
2022 · objectiv.io · its alternatives →
10
A fast HNSW implementation in Rust▲111
HNSW implementation in Rust. Reference: https://arxiv.org/ftp/arxiv/papers/1603/1603.09320.pdf - swapneel/hnsw-rust
2024 · github.com · its alternatives →
11
LaminarDB – Streaming SQL database in Rust, zero-alloc hot path▲6
Open-source streaming SQL engine written in Rust using Apache Arrow and DataFusion. Supports continuous queries, temporal stream joins, tumbling/session windows, and CDC/Kafka connectors. Lightweight, embeddable, and sub-microsecond latency - laminardb/laminardb
Feb 2026 · github.com · its alternatives →
12
SwimOS Rust – A framework for real-time streaming data applications▲71
2024 · github.com · its alternatives →
13
Bolt: A research language with finer-grained concurrency than Rust▲103
Bolt is a language with in-built data-race freedom! - mukul-rathi/bolt
2020 · github.com · its alternatives →
14
KiviDB, a faster Redis-compatible memory database and vector cache▲69
A fast, multi-threaded Redis® and Valkey alternative written in Rust: drop-in compatible, with full-text and vector search built in - kividbio/kividb
2d ago · github.com · its alternatives →
15
GraphJSON – Easily log and analyze events using ClickHouse▲128
Hi HN, My name is JR and I had a need for a simple analytics solution that allowed me to store (timestamp, json) logs and run SQL over them. It was hard to find the right solution. Solutions like Mixpanel and Amplitude optimized for particular report types. Whereas solutions like Snowflake, BigQuery, etc. required a lot of setup. I built GraphJSON to fit in the middle. I strived for the ease of use of tools like Mixpanel and Amplitude, but wanted to ensure affordances were built to support use cases that big data warehouses enable. Under the hood, GraphJSON is powered by ClickHouse. This…
2022 · graphjson.com · its alternatives →
16
Syncular – offline-first SQL sync with TypeScript and Rust cores▲79
Offline-first SQL sync with Typescript and Rust cores - syncular/syncular
Aug 2026 · github.com · its alternatives →
17
Querying JSON documents using SQL-like language in Scala▲70
SQL micro-dialect implementation for querying JSON objects. Written purely in Scala. - mmalek06/JsonSql
2020 · github.com · its alternatives →
18AF
Apache Fory Rust – 10-20x faster serialization than JSON/Protobuf▲67
Serialization framework with some interesting numbers: 10-20x faster on nested objects than json/protobuf. Technical approach: compile-time codegen (no reflection), compact binary protocol with meta-packing, little-endian layout optimized for modern CPUs. Unique features that other fast serializers don't have: - Cross-language without IDL files (Rust ↔ Python/Java/Go) - Trait object serialization (Box) - Automatic circular reference handling - Schema evolution without coordination Happy to discuss design trade-offs. Benchmarks:…
Oct 2025 · fory.apache.org · its alternatives →
19
Coerce – Distributed actor framework in Rust▲74
Actor runtime and distributed systems framework for Rust - LeonHartley/Coerce-rs
2023 · github.com · its alternatives →
20
Tantivy▲68
A full-text, horse-speed search engine library in Rust
2022 · github.com · its alternatives →
21
Kalosm an embeddable framework for pre-trained models in Rust▲66
Hi everyone, I'm happy to announce the release of Kalosm! [Kalosm](https://floneum.com/kalosm/) is a framework for embedded AI in rust. ## What is Kalosm? Kalosm provides a simple interface for pre-trained language, audio, and image models models. To make it easy to use with these models in your application, Kalosm includes a set of integrations other systems like your database or documents. ```rust use kalosm::language::*; #[tokio::main] async fn main() { let mut model = Llama::new_chat(); let mut chat = Chat::builder(&mut model) .with_system_prompt("The assistant will…
2024 · floneum.com · its alternatives →
22
An expression parser supporting multiple types▲33
This C library is part of a main project aimed at providing a reactive key-value (KV) database. The data is typed (numbers, strings, dates, or booleans) and can include formulas with references to other entries. Clients connected to this database receive a real-time data stream with updates to the subscribed keys, allowing them to react to changes and their dependencies. Essentially, it’s like building a distributed Excel, where data and formulas dynamically update across the system. I couldn’t find any libraries that offered the full set of features I needed for evaluating expressions, so I…
2024 · github.com · its alternatives →
23
Sqlkit – Golang SQL package with nested transactions▲65
SQL builder and powerful database toolkit for Golang - colinjfw/sqlkit
2019 · github.com · its alternatives →
24
Rxdb – A fast, reactive, client-side database▲52
The local-first database that runs on every JS runtime and replicates with your existing backend - no vendor, no lock-in - https://rxdb.info/ - pubkey/rxdb
2017 · github.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →