Arroyo

About

Arroyo is ranked #11 of 24 in stream processing software on Inferse. It runs on API, Linux, macOS, Self-hosted, Web. There is a free plan.

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

Company

Founded

2022arroyo.dev · 28 Sept 2026

Where it ranks on Inferse

• Best Stream Processing Software in 2026#11 of 24

Sources

• doc.arroyo.dev· checked 4 Oct 2026
• arroyo.dev· checked 4 Oct 2026
• doc.arroyo.dev/deployment/· checked 4 Oct 2026
• doc.arroyo.dev/deployment/kubernetes/· checked 4 Oct 2026
• arroyo.dev/blog/arroyo-is-joining-cloudflare/· checked 4 Oct 2026