
Wasmer
QuickJS
Lapce
Kata Containers
OpenCL
PostSharp
Extism is the open source, universal plug-in system. Extend all the software everywhere! Powered by WebAssembly.

Go Global World
VC Sheet
Raizer
cabal
Investor Scout
Crunchbase
Exitfund
OpenVC is a startup fundraising platform with 15,000+ verified investors, a powerful CRM, and pitch deck tracking tools. It’s free forever with no commissions—making fundraising more transparent and efficient.
Which is more popular?
Based on our record, Extism should be more popular than OpenVC. It has been mentioned 25 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | extism.org | openvc.app |
| Pricing | ||
| Company | — | Startup from France · 1 - 9 employees · 2020 |
| Listed in |
What each product offers, as listed by its team.


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An editorial look at what each product does well and who it suits.


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Overall verdict
Why this product is good
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Extism and OpenVC. For example, how are they different and which one is better?
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 / 4 months ago
I'm obviously biased, but yes, https://openvc.app is what you're looking for. Source: over 4 years ago
Lmk if I can help with data/insights! (I run openvc.app). Source: over 4 years ago
I'm the co-founder of openvc.app, a radically free and open platform that lets founders search 4,000+ VC firms by investment thesis. Source: almost 5 years ago
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