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Convex.dev
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TmpState.dev
Supabase
Upstash
Firebase
Altogic
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TmpState.dev's answer:
TmpState is a tokenless temporary JSON database. One curl tmpstate.dev creates a real database and returns its URL - and that URL is the only credential. No signup, no API keys, no .env, no OAuth.
TmpState.dev's answer:
Compared to jsonbin.io, npoint.io, json-server, or standing up Firebase/Supabase, TmpState removes the entire setup step:
Best for throwaway and prototype state. It is honest about when not to use it: it is not meant to be your permanent production database.
TmpState.dev's answer:
Developers and the AI agents working on their behalf. Primarily:
TmpState.dev's answer:
TmpState came out of a recurring frustration in agent workflows: AI agents constantly need somewhere to keep state, but you cannot hand them your real cloud credentials, and wiring up a database mid-task kills the flow. So the model was inverted - build a database where the URL itself is the only credential, so an agent (or a person with one curl) can create its own backend instantly, with nothing to sign up for and nothing to leak. It is a solo, founder-built, agent-first product, launched in July 2026.
AppWrite - Appwrite provides web and mobile developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.
Supabase - An open source Firebase alternative
Upstash - Upstash provides Serverless Redis and Kafka as a service.
Xano - Xano is the fastest way to build a scalable backend for your App using No Code.
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
Convex.dev - Global state management for react