Sanity vs Rivet
Side-by-side trajectory, velocity, and editorial themes.
Sanity is quietly wiring its CMS to be operated by agents as much as by humans.
Sanity is shipping on several fronts in parallel: a maturing MCP server and agent tooling, a Media Library growing real asset-management depth, and steady Studio and SDK ergonomics. The recent run is incremental but coherent — richer Media Library metadata and reference tracking, searchable reference fields, and a stream of MCP tool fixes. Nothing here reshapes the product; it is compounding polish on an already broad platform.
The clearest theme is agent-operability. The MCP server, a skills-install CLI command, agent-focused doc quickstarts, and copy-paste commands 'for humans and agents' all point at Sanity treating AI coding agents as a first-class way to drive the CMS. In parallel, Media Library is being built out toward a full DAM, and @sanity/presets is trimming schema boilerplate.
Expect the MCP and agent surface to keep expanding and Media Library to keep gaining DAM-grade features; the presets package suggests more ready-made schema building blocks ahead.
Rivet pivots from actor backend to a coding-agent OS, and is building the ecosystem to match.
Rivet began as an actor and serverless backend platform — RivetKit, Rivet Actors, Rivet Compute — and has spent the last month reorienting around agentOS, a WebAssembly-based Linux environment for running coding agents without a heavy sandbox. The June and July releases show both threads running in parallel: native language SDKs (Rust, Effect) for Actors, and a fast-maturing agentOS that now has its own package registry.
The center of gravity is shifting from hosting stateful actors to being the runtime coding agents execute inside. agentOS went from a v0.2 sandbox alternative to shipping a package registry and a sub-millisecond package manager in under two weeks, a sign Rivet wants to own the developer surface around agent execution, not just the compute underneath it.
Expect agentOS to keep accreting ecosystem pieces — more registry content and tighter orchestration — while the Actors SDKs settle toward maintenance. A likely next move is deeper coupling between agentOS and Rivet Compute so agents run on Rivet's own cloud.
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