Chloe and Mastra

Mastra, in one process and one file.

Both are TypeScript. Chloe is one npm install, one SQLite file, and a model asked only where a step needs it.

Chloe or Mastra: which should I use?

Use Mastra for a full-stack agent app with its own studio and storage. Use Chloe for agents that run as jobs in one process and one SQLite file, with 20 packages installed rather than about 150.

MastraChloe

Behaviour written inTypeScriptTypeScript

Next step chosen byThe model, or a workflowYour code

Model answersTyped, via schemaTyped, checked

Agent limitsSteps, tokensTools, steps, budget

Waiting on a personSuspends, with storageParks for days

On a scheduleBuilt in, with storageBuilt in

Run historyMastra StudioBuilt in, with cost

Packages installedAbout 15020

Best forFull-stack agent appsDaily routines

From Mastra's docs, read 3 Oct 2026. Out of date? Tell us.

Every run

See which line asked a model, and what it cost.

StepTookCost

load messagesstep12msfree

classify issuemodel1.4s$0.0031

investigate issueagent14.2s$0.0190

Chloe

$ npm install @chloejs/core && npx chloe setup

Get Started Examples