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Extism VS PredictMirror

Compare Extism VS PredictMirror and see what are their differences

Extism

Extism is the open source, universal plug-in system. Extend all the software everywhere! Powered by WebAssembly.

Rating
0 reviews
Pricing
Open source
Alternatives Is it good?
PredictMirror

Practice prediction markets without risking real money with PredictMirror, the best paper trading simulator for Polymarket. Free Extension.

Rating
0 reviews
Alternatives Is it good?
Lucris
Financial decision-making for Shopify brands, connecting sales and marketing to show what drives profit - and what to do next. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Extism seems to be more popular. It has been mentioned 25 times since March 2021.

social mentions
25 vs 0
Application And Data popularity
100% vs 0%
alternatives listed
6 vs 13

Base details

Website, pricing, platforms and company facts side by side.

Extism
PredictMirror
Website extism.org predictmirror.com
Pricing
Open source
—
Platforms —
Google Chrome Vivaldi
Listed in
Application And Data Languages & Frameworks Language Extensions Software Development Text Editors +2
Trading Prediction Market Finance Cryptocurrencies Cryptocurrency Trading Crypto Fintech +4

Features and specs

What each product offers, as listed by its team.

Extism 0 features
PredictMirror 5 features

No features have been listed yet.

  • Live order book mirror
    Real Polymarket prices, refreshed continuously. Your simulated trades fill at the actual market price, with realistic slippage modeled in.
  • Real-time P&L
    Every position tracks the market live. Sparklines on the portfolio view, full area charts with fill history on the detail view.
  • Win streaks & edge
    Track your win rate, current streak, and the edge you're capturing versus market consensus. Learn what you're actually good at.
  • Open and closed history
    Every paper trade is logged. Filter active versus closed positions, see realized P&L by period, and learn from your wins and losses.
  • Privacy-first by design
    Nothing leaves your browser. No accounts, no servers, no tracking. Your trading data lives in local storage only, and you control it.

Analysis

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

Extism
PredictMirror

No analysis of Extism yet.

Overall verdict

  • I don't have verified, up-to-date information about PredictMirror (predictmirror.com), so I can't confirm whether it's legitimate, effective, or trustworthy. I'd recommend independent research before using or paying for this service.

Why this product is good

  • I have no reliable data on this specific website's reputation, ownership, or track record
  • I cannot verify claims about its predictions, accuracy, or business practices
  • There is no independent evidence available to me confirming it is a legitimate, safe, or effective product
  • Unverified prediction or forecasting sites can carry risks including data privacy issues, low accuracy, or financial loss if used for betting/trading decisions

Recommended for

  • Anyone considering this site should first check for verifiable reviews, WHOIS/domain history, and independent user testimonials
  • Users should look for regulatory registration if it involves financial or betting predictions
  • Not recommended to rely on until verified by trusted third-party sources such as consumer protection sites, security scanners (e.g., VirusTotal, Trustpilot), or financial regulators if applicable

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Extism
PredictMirror
100% 100%
Application And Data
0% 0%
0% 0%
Trading
100% 100%
100% 100%
Software Development
0% 0%
0% 0%
Prediction Market
100% 100%

User comments

Share your experience with using Extism and PredictMirror. For example, how are they different and which one is better?

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Extism 25 mentions
PredictMirror 0 mentions
  • WASI 0.3.0 Released
    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 / 4 months ago
  • WASI 0.3.0 Released
    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 / 4 months ago
  • The Road to the WASM Component Model 1.0
    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

View more

Tracking PredictMirror since Jun 2026.

Alternatives to Extism and PredictMirror

When comparing Extism and PredictMirror, you can also consider the following products.

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