infinity vs rivet
Agent runtimes and durable actors compared
infinity is a Rust framework for concurrent agents that can yield while tools run and resume when events arrive. rivet orchestrates durable, stateful Actors for agents, workflows, and realtime applications, with Actor code running on Node.js, Bun, or Rust. The main difference is that infinity centers on agent turns and asynchronous tool events, while rivet provides broader Actor scheduling, persistence, and communication infrastructure.
infinity: Build Concurrent Agent Systems in Rust
Infinity is a Rust runtime for building massively concurrent agent systems. Agents yield while tools run, then resume when events arrive, supporting both resident processes and serverless deployment such as AWS Lambda.
rivet: Orchestrate Durable Actors for Agent Workloads
Rivet is a platform for durable Actors: stateful processes for AI agents, workflows, and realtime apps. Its Rust control plane schedules Actors that run on Node.js, Bun, or Rust, with per-Actor persistence and self-hosting options.
| infinity | rivet | |
|---|---|---|
| Language | Rust | Rust |
| License | Apache-2.0 | Apache-2.0 |
| Stars | 518 | 6.5k |
| Forks | 55 | 295 |
| Last analyzed | Nov 3, 2026 | Oct 31, 2026 |
Key differences
- infinity hibernates waiting agents as conversation data; rivet preserves per-Actor state, including SQLite and key-value storage, while Actors hibernate when idle.
- infinity includes the Reactive Agent Protocol and an MCP compatibility layer for asynchronous tool results and subscription events; rivet provides HTTP and WebSocket access, event broadcasting, Actor-to-Actor calls, and scheduled execution.
- infinity runs the same agent code in resident processes or on AWS Lambda; rivet can run locally, be self-hosted, use Rivet Cloud, or operate in a customer's cloud through BYOC.
- infinity is a Rust framework and runtime; rivet has a Rust control plane, while its Actor code can run on native Node.js, Bun, or Rust.
- infinity reports 518 stars and 55 forks, with contributor activity concentrated; rivet reports 6.5k stars and 295 forks, with contributions from multiple developers. Rivet's latest release is a preview and it has a substantial open issue backlog.
- infinity is Apache-2.0 licensed; rivet is Apache-2.0 licensed.
Choose infinity if you…
- build Rust agents that yield during slow tool calls and resume when results arrive.
- deploy the same agent code in a resident process or on AWS Lambda.
- use RAP or the MCP compatibility layer for networked tools and asynchronous events.
Choose rivet if you…
- need keyed, stateful Actors with persistence, scheduling, and recovery across a cluster.
- build agent backends, collaborative applications, or durable workflows with realtime communication.
- want Actor code to run on Node.js, Bun, or Rust, with self-hosting or cloud deployment options.
Compare the numbers side by side, or add more projects
This comparison is generated with AI from the OSRepos analyses of both projects. Always check each project's repository and documentation before choosing.