--- title: "LLMs-from-scratch vs PROMPTPurify" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/rasbt-llms-from-scratch-vs-securelayer7-promptpurify" tools: ["rasbt-llms-from-scratch", "securelayer7-promptpurify"] --- # LLMs-from-scratch vs PROMPTPurify *GraphCanon updated Jul 15, 2026* ## Verdict Pick LLMs-from-scratch when lLMs-from-scratch is primarily Jupyter Notebook; PROMPTPurify is TypeScript; pick PROMPTPurify when pROMPTPurify is primarily TypeScript; LLMs-from-scratch is Jupyter Notebook. [LLMs-from-scratch](https://amzn.to/4fqvn0D) reports 99k GitHub stars, 15k forks, and 4 open issues, last pushed Jun 2, 2026. [PROMPTPurify](https://anton.securelayer7.net) has 76 stars, 20 forks, and 0 open issues, last pushed May 31, 2026. Figures are from public GitHub metadata via [LLMs-from-scratch's repository](https://github.com/rasbt/LLMs-from-scratch) and [PROMPTPurify's repository](https://github.com/securelayer7/PROMPTPurify). | | [LLMs-from-scratch](/tools/rasbt-llms-from-scratch.md) | [PROMPTPurify](/tools/securelayer7-promptpurify.md) | | --- | --- | --- | | Tagline | Implement a ChatGPT-like LLM in PyTorch from scratch, step by step | Prompt-injection guardrail for LLM applications. Compact model that outperforms larger open-source guards. No regex, no signatures. Demo: anton.securelayer7.net | | Stars | 98,899 | 76 | | Forks | 15,183 | 20 | | Open issues | 4 | 0 | | Language | Jupyter Notebook | TypeScript | | Adopt for | LLMs-from-scratch is a project-oriented repository aimed at building PyTorch-based language models from the ground up, with detailed step-by-step instructions. | - | | Persona | - | - | | Runtime | - | - | | License | Other | MIT | | Categories | LLM Frameworks, Model Training | Computer Vision, LLM Frameworks, Model Training | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [LLMs-from-scratch](/tools/rasbt-llms-from-scratch.md) | [PROMPTPurify](/tools/securelayer7-promptpurify.md) | | --- | --- | --- | | Days since push | 38d | 44d | | Open issues (now) | 4 | 0 | | Owner type | User | Organization | | Full report | [trust report](/tools/rasbt-llms-from-scratch/trust.md) | [trust report](/tools/securelayer7-promptpurify/trust.md) | ## Decision facts: LLMs-from-scratch - **Adopt for:** LLMs-from-scratch is a project-oriented repository aimed at building PyTorch-based language models from the ground up, with detailed step-by-step instructions. ## Choose when ### Choose LLMs-from-scratch if… - LLMs-from-scratch is primarily Jupyter Notebook; PROMPTPurify is TypeScript. - License: LLMs-from-scratch is Other, PROMPTPurify is MIT. - Tags unique to LLMs-from-scratch: ai, artificial-intelligence, attention-mechanism, deep-learning. - - You are an advanced practitioner aiming to fully understand the underpinnings of LLMs using PyTorch as your primary framework. ### Choose PROMPTPurify if… - PROMPTPurify is primarily TypeScript; LLMs-from-scratch is Jupyter Notebook. - License: PROMPTPurify is MIT, LLMs-from-scratch is Other. - Tags unique to PROMPTPurify: ai-firewall, ai-safety, ai-security, application-security. - Also covers Computer Vision. ## When NOT to use LLMs-from-scratch - - If you are looking for a rapid deployment of an LLM without understanding its intricate structure - this tool requires extensive manual and conceptual work. - - You prefer frameworks with automatic model generation or other high-level abstractions that simplify the process. This repository emphasizes manual creation, which is more time-consuming but offers - a deeper learning experience. ## When NOT to use PROMPTPurify - LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. - Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. ## Common questions ### What is the difference between LLMs-from-scratch and PROMPTPurify? LLMs-from-scratch: Implement a ChatGPT-like LLM in PyTorch from scratch, step by step. PROMPTPurify: Prompt-injection guardrail for LLM applications. Compact model that outperforms larger open-source guards. No regex, no signatures. Demo: anton.securelayer7.net. See the comparison table for live GitHub stats and shared categories. ### When should I choose LLMs-from-scratch over PROMPTPurify? Choose LLMs-from-scratch over PROMPTPurify when LLMs-from-scratch is primarily Jupyter Notebook; PROMPTPurify is TypeScript; License: LLMs-from-scratch is Other, PROMPTPurify is MIT; Tags unique to LLMs-from-scratch: ai, artificial-intelligence, attention-mechanism, deep-learning; - You are an advanced practitioner aiming to fully understand the underpinnings of LLMs using PyTorch as your primary framework. ### When should I choose PROMPTPurify over LLMs-from-scratch? Choose PROMPTPurify over LLMs-from-scratch when PROMPTPurify is primarily TypeScript; LLMs-from-scratch is Jupyter Notebook; License: PROMPTPurify is MIT, LLMs-from-scratch is Other; Tags unique to PROMPTPurify: ai-firewall, ai-safety, ai-security, application-security; Also covers Computer Vision. ### When should I avoid LLMs-from-scratch? - If you are looking for a rapid deployment of an LLM without understanding its intricate structure - this tool requires extensive manual and conceptual work. - You prefer frameworks with automatic model generation or other high-level abstractions that simplify the process. This repository emphasizes manual creation, which is more time-consuming but offers a deeper learning experience. ### When should I avoid PROMPTPurify? LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. ### Is LLMs-from-scratch or PROMPTPurify more popular on GitHub? LLMs-from-scratch has more GitHub stars (98,899 vs 76). Stars measure visibility, not whether either tool fits your constraints. ### Are LLMs-from-scratch and PROMPTPurify open source? Yes - both are open-source projects on GitHub (LLMs-from-scratch: Other, PROMPTPurify: MIT). ### Where can I find alternatives to LLMs-from-scratch or PROMPTPurify? GraphCanon lists graph-backed alternatives at [LLMs-from-scratch alternatives](/tools/rasbt-llms-from-scratch/alternatives) and [PROMPTPurify alternatives](/tools/securelayer7-promptpurify/alternatives) ([LLMs-from-scratch markdown twin](/tools/rasbt-llms-from-scratch/alternatives.md), [PROMPTPurify markdown twin](/tools/securelayer7-promptpurify/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/rasbt-llms-from-scratch-vs-securelayer7-promptpurify.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, LLMs-from-scratch or PROMPTPurify? LLMs-from-scratch: Steady. PROMPTPurify: Steady. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for LLMs-from-scratch and PROMPTPurify? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [LLMs-from-scratch trust report](/tools/rasbt-llms-from-scratch/trust); [PROMPTPurify trust report](/tools/securelayer7-promptpurify/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=rasbt-llms-from-scratch`](/api/graphcanon/graph?tool=rasbt-llms-from-scratch) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_