Arroyo

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Score7.2

Rank#5 of 23

PriceFree

Free planYes

Runs onAPI, Linux, macOS, Self-hosted, Web

Summary

Arroyo is ranked #5 of 23 in stream processing software on Everything Xiaomi. It runs on API, Linux, macOS, Self-hosted, Web. There is a free plan.

Arroyo plans and pricing

All plans

Open-source Arroyo Engine Free Apache 2.0 licensed; single binary; self-hosted arroyo.dev · 4 Oct 2026

Compared on stream processing software

Deployment model: hybridarroyo.dev
SQL processing: Yesarroyo.dev
Stateful processing: Yesarroyo.dev
Event-time windows: Yesarroyo.dev
Supported languages: SQL, Rustarroyo.dev
Source connectors: 16arroyo.dev

Facts

Purpose: Arroyo is a distributed stream processing engine for stateful computations on data streams, with sub-second results.doc.arroyo.dev · 4 Oct 2026
SQL pipelines: Users define streaming pipelines with analytical SQL, including complex queries, windows, and joins.doc.arroyo.dev · 4 Oct 2026
Scale: Arroyo says it can scale to millions of events per second and supports horizontal and vertical rescaling.arroyo.dev · 4 Oct 2026
Fault tolerance: The engine supports state checkpointing for fault tolerance and pipeline recovery, and exactly-once processing.doc.arroyo.dev · 4 Oct 2026
Connectors: Listed integrations include Kafka, Confluent Cloud, Kinesis, MQTT, NATS, MySQL, Postgres, Redis, Redpanda, Delta Lake, Iceberg, HTTP, WebSocket, and Webhooks.doc.arroyo.dev · 4 Oct 2026
Formats and functions: Arroyo natively reads and writes JSON, Avro, Parquet, text, and binary, and includes over 300 SQL functions.arroyo.dev · 4 Oct 2026
User-defined functions: Users can extend SQL with Rust scalar, aggregate, and asynchronous user-defined functions.arroyo.dev · 4 Oct 2026
Web UI and API: The Web UI supports managing connections, developing and testing SQL queries, and monitoring pipelines; pipelines can also be managed through a REST API.arroyo.dev · 4 Oct 2026
Deployment: The single-node cluster is intended for testing and development; production deployments use a distributed cluster with Arroyo’s built-in scheduler or Kubernetes.doc.arroyo.dev · 4 Oct 2026
Supported storage: Checkpoint and artifact storage options include S3-compatible stores, R2, GCS, Azure Blob Storage, and local filesystems.doc.arroyo.dev · 4 Oct 2026
Security configuration: The Kubernetes deployment guide describes AWS IAM Roles for Service Accounts as the most secure way it covers to grant pods access to AWS resources.doc.arroyo.dev · 4 Oct 2026
Support: The deployment guide invites users rolling out clusters to contact [email protected] or ask questions on Discord.doc.arroyo.dev · 4 Oct 2026
Company history: Arroyo’s founders say they started the company in 2022 and open-sourced the engine in 2023.arroyo.dev · 4 Oct 2026
Acquisition: Arroyo announced its acquisition by Cloudflare in April 2025 and said the engine would remain open-source and self-hostable.arroyo.dev · 4 Oct 2026