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Prompt-api Alternatives
Similar projects and alternatives to prompt-api
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expo
An open-source framework for making universal native apps with React. Expo runs on Android, iOS, and the web.
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vertex-ai-samples
Notebooks, code samples, sample apps, and other resources that demonstrate how to use, develop and manage machine learning and generative AI workflows using Google Cloud Vertex AI.
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transformers.js
State-of-the-art Machine Learning for the web. Run 🤗 Transformers directly in your browser, with no need for a server!
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tersenet
A new type of JavaScript-free light-weight fast browser built on rst and web assembly. Does not actually exist.
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RAGatouille
Easily use and train state of the art late-interaction retrieval methods (ColBERT) in any RAG pipeline. Designed for modularity and ease-of-use, backed by research.
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NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better prompt-api alternative or higher similarity.
prompt-api discussion
prompt-api reviews and mentions
Posts with mentions or reviews of prompt-api.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2026-05-05.
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Chrome's Gemini Nano Prompt API: A Step-by-Step Guide
The technical name for this is the Prompt API (official spec, Chrome docs). It's been in Chrome's bowels since version 138 — initially behind a flag, now also available as an Origin Trial for production sites. The big news is that a critical mass of developers just figured out it's there, and the demos hitting HN every week (Decaf rewriting comments, Subtitle Insights translating YouTube live, the side-panel UI above) are no longer "look what's possible" — they're "I shipped it last weekend."
- Mozilla's Opposition to Chrome's Prompt API
- Show HN: Apfel – The free AI on your Mac
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Swift on Android: Full Native App Development Now Possible
I guess this is the Dunning-Kruger effect everyone talks about!
To understand just enough to regurgitate what happened, but miss why it happened... and then assume someone who's pointing at the much more relevant why is just plain wrong.
Because the why requires actually understanding of things like developer mindshare rather than regurgitating search results.
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The hint I'll leave if you're willing to consider maybe you don't know everything ever... look at who's feedback is being promoted when Chrome wants to do obviously unpopular things on the web: https://github.com/webmachinelearning/prompt-api/blob/main/R...
https://github.com/mozilla/standards-positions/issues/1213
And model for yourself what happens if the developer interest exceeds vendor refusal in magnitude, so Google just ships the thing, without a feature flag, to a massive percentage of the web-going world.
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WebMCP
https://github.com/webmachinelearning/prompt-api
https://developer.chrome.com/docs/ai/built-in :
> Standardization effort: We're working to standardize all of these APIs for cross-browser compatibility.
> The Language Detector API and Translator API have been adopted by the W3C WebML Working Group. We've asked Mozilla and WebKit for their standards positions.
> The Summarizer API, Writer API, and Rewriter API have also been adopted by the W3C WebML Working Group. We've asked asked Mozilla and WebKit for their standards positions.
webmachinelearning/webmcp:
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Show HN: Grammit – Local-only AI grammar checker (Chrome extension)
I don't know if Vivaldi supports the new Prompt API [0] that Grammit uses to run the local LLM.
As far as I know, the only browsers supporting it currently are Chrome [1] and Edge [2].
[0] https://github.com/webmachinelearning/prompt-api
[1] https://developer.chrome.com/docs/extensions/ai/prompt-api
[2] https://learn.microsoft.com/en-us/microsoft-edge/web-platfor...
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WebGPU enables local LLM in the browser. Demo site with AI chat
There is a Prompt API in development that's available in both Chrome and Edge to give pages to a local LLM. Chrome extensions have access to it and I believe websites can request access as part of an origin trial.
The model is fully managed by the browser. It's currently the Gemini Nano model on Chrome, and they are testing a version of the Gemma 3n model in beta channels. Edge uses phi-4-mini.
You can learn more here: https://github.com/webmachinelearning/prompt-api
- Explainer for the Prompt API: design sketch by the Chrome built-in AI team
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Orbit. Mozilla's AI Assistant for Firefox
I wish they would copy this one https://github.com/webmachinelearning/prompt-api and include a few options for small self-hosted LLMs using WebGPU or some built-in accelerated AI for Firefox.
- Explainer for the Prompt API
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A note from our sponsor - SaaSHub
www.saashub.com | 15 Jun 2026
Stats
Basic prompt-api repo stats
14
747
6.3
2 months ago
webmachinelearning/prompt-api is an open source project licensed under GNU General Public License v3.0 or later which is an OSI approved license.
The primary programming language of prompt-api is Bikeshed.
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