Terse Durable Actors

Not yet independently verified. No maker launch date, so it is dated from the Y Combinator launch listing (the post itself carries a 29 October timestamp). Reliability, cost savings and benchmarks against other products are the company's own claims and untested; its site gives New York. We will update this when it can be confirmed, and remove this note.

Ten agents working on one large CSV, with a shared Postgres variable serving stale data to half of them and duplicated work as the result: that was the problem Terse's founder says led to Durable Actors, his answer to Cloudflare's Durable Objects without the lock-in to its Workers platform.

One request at a time

Each actor handles a single request at a time, which the founders say prevents the race conditions that appear when several agents share a record. Every actor bundles its own SQLite database and WebSocket server, so state, chat history or a collaborative document sits next to the code that changes it. According to the launch post, idle actors go dormant and are backed up in S3, so cost follows use. The site says every write streams to GCS Rapid storage, and each actor gets a live dashboard of request rate, queue wait and run time.

Defined in TypeScript

An actor is a TypeScript class with decorators such as persisted fields, and its methods become the client's remote calls. A command-line tool runs actors locally, deploys them to Terse Cloud and generates a typed client for a backend, command-line tool or serverless function. The runtime is written in Rust.

Priced by the second

Terse Cloud bills $0.00001971 per CPU-second and $0.00000667 per GiB-second of memory requested; its estimator puts one standard actor (0.25 CPU, 256 MiB) running for an hour at about $0.024. The runtime can also be self-hosted.

Two founders

Thomas spent seven years at Apple as a staff engineer on the platform behind Siri, and Olivier built data pipelines at Squarespace and the New York Times.

Key facts

Maker: Terse (New York) Founders: Thomas and Olivier (surnames not given) Launched: 30 October 2026 on Y Combinator's launch board YC batch: Fall 2026 Pricing: $0.00001971 per CPU-second; $0.00000667 per GiB-second (as the site states) License: MIT, open source (github.com/TerseAI/durable-actors) Website: useterse.ai