Rivet

Active

Open-Source alternative to Durable Objects

Backed by Y Combinator · a16z Speedrun

Winter 2023Founded 20225 peopleSan Francisco, CA, USA

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About

Easily build & scale AI agents, functions, stateful services, and more. Open-source & self-hostable.

From their website

as of Jun 7, 2026rivet.dev ↗

SaaSSubscription

Rivet provides infrastructure for running stateful, long-running AI agent workloads with features like real-time actors, durable workflows, and an agentOS, available as a cloud service or self-hosted within a customer’s VPC or air-gapped environment.

Rivet offers an actor-based runtime and an operating system for agents, enabling stateful workloads that read/write instantaneously, run long-running workflows, and scale from zero to burst capacity. It can be deployed in Rivet Cloud or self-hosted inside a VPC or on-prem, supports embedding in existing backends, provides built-in observability, WebSocket real-time streams, multi-step workflows with durable queues and timers, and ships with an open-source agentOS built on WASM/V8. They provide local development via RivetKit, self-hosting options (Rust binary or Docker), and a single binary deployment for cloud or on-prem environments, with configurable security and data residency controls.

Who it’s for: developers building AI agents and real-time applications requiring stateful, long-running workloads; teams needing self-hosted or air-gapped deployments with regulatory/compliance considerations

Features

stateful actors with real-time reads/writes
long-running workflows with durable queues and timers
global edge network for low-latency access
embedded agentOS built on WASM/V8
WebSocket bidirectional streaming
self-hosting and cloud deployment options
observability dashboards and real-time event monitoring

YC-backed / affiliated with Y Combinator branding on site; mentions self-hosting, on-prem, air-gapped deployments, enterprise/compliance capabilities

Founders · 2

Nicholas KisselFounder

🎓 Addicting Games. University🎓 University of Arizona

Building open-source Cloudflare Workers & Durable Objects. Previously at Paradox.ai & Addicting Games. University of Arizona.

LinkedIn ↗X ↗

Nathaniel FlurryFounder

Building open-source Cloudflare Workers & Durable Objects.

LinkedIn ↗X ↗

Launch

Launched on Y Combinator · Mar 2023

View launch post ↗

Run multiplayer games with managed game servers, matchmaking, and DDoS mitigation.

Rivet provides managed game servers, auto-scaling, matchmaking, and DDoS mitigation for multiplayer games, aiming to simplify hosting for small to mid-sized studios. The launch announces a closed beta access, a 4-line integration, a developer dashboard, and the ability to run games across engines with minimal downtime."

From the original launch (Mar 2023) — may be outdated.