
Avataaars Generator
Wasmer
QuickJS
Kata Containers
Lapce
Productivity Power Tools
Medium
Extism is the open source, universal plug-in system. Extend all the software everywhere! Powered by WebAssembly.

Firebase
AppWrite
Vercel
Next.js
PocketBase.io
Railway
Hasura
An open source Firebase alternative
Which is more popular?
Based on our record, Supabase seems to be a lot more popular than Extism. While we know about 554 links to Supabase, we've tracked only 25 mentions of Extism.
Website, pricing, platforms and company facts side by side.
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| Website | extism.org | supabase.com |
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| Company | — | Startup from the United States |
| Listed in |
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External articles and on-site reviews we used to compare the two products.


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Supabase offers an open-source PostgreSQL backend that is tailored for developers with simplicity and scalability requirements. Its fully managed infrastructure aligned with integrated APIs makes it an excellent...
Supabase: An open-source BaaS alternative to Firebase, offering instant Postgres APIs, auth, edge functions, and growing AI-ready tooling. Ideal for modern dev teams but limited in orchestration and multi-agent flows.
Supabase makes it incredibly easy to migrate from Firebase. Its data structure and APIs are designed to feel familiar, so you can switch without a major learning curve. Plus, the open-source nature means you have...
Recommendations tracked on public social media and blogs since March 2021.


Technically WASI 0.1, but I used it (via Extism[0]) to implement a simple login library[1] that works in Rust, Go, and Node. Would be trivial to add other lanugages supported by Extism. Overall I loved the dev experience. [0]:... - Source: Hacker News / 3 months ago
I tinkered with https://extism.org and basically the use case is that they suggest, namely you can extend software in another programming language but without having to setup a container or VMs on the client. They "just" run the code in... - Source: Hacker News / 3 months ago
Check out https://extism.org, it is built for those kinds of use cases. However I think WASI and components could enhance it. - Source: Hacker News / 3 months ago
Opus, zero nudges. Realised on its own that an abandoned signup never fires identify, triangulated the anonymous session from time, platform and registration events, decoded the PostHog replay blobs, confirmed the duplicate account in... - Source: dev.to / 2 months ago
Supabase is an open-source backend platform built around managed PostgreSQL. You get a database, auto-generated REST APIs (via PostgREST), Auth, file Storage, Realtime subscriptions, and Edge Functions - with a dashboard and SQL editor... - Source: dev.to / 4 months ago
If you’re starting fresh, go to Supabase and create a new project. Once your project is ready, copy the project URL and publishable (anon) key from the project settings. - Source: dev.to / 4 months ago
When comparing Extism and Supabase, you can also consider the following products.


Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
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Appwrite provides web and mobile developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.
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Application and Data, Build, Test, Deploy, and JavaScript Compilers
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Vercel is the platform for frontend developers, providing the speed and reliability innovators need to create at the moment of inspiration.
Compare Vercel to Extism or Supabase: