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Kontext

Name: Kontext
Author: 9bests.com

An open-source Chrome extension that captures your full ChatGPT or Claude conversation via the platform API, summarizes it on-device with Gemini Nano, and hands a structured kontext to any other AI.

★★★⯨☆ 3.75 Free

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📖 9bests In-Depth Review Aug 22, 2026

Kontext Review 2026: Move an AI Chat's Full Context to Another Tool

Kontext is a Chrome extension that captures your full ChatGPT or Claude conversation via the platform API, summarizes it on-device with Gemini Nano, and hands a structured kontext to any other AI. We review the capture fidelity and the early-stage gaps.

Read the full long-form review & analysis →

💡 9bests Editorial Buying Advice

Why choose Kontext: An open-source Chrome extension that captures your full ChatGPT or Claude conversation via the platform API, summarizes it on-device with Gemini Nano, and hands a structured kontext to any other AI.

Optimal workflow match: Ideal for teams seeking automated and streamlined AI workflows.

✅ Pros / Key Advantages

• Full-fidelity API capture, not lossy DOM scraping
• On-device Gemini Nano summary, private, no key
• BYOK fallback chain with free-tier models
• Privacy-first: zero telemetry, local storage
• Structured kontext format for AI-to-AI handoff

❌ Cons / Limitations

• Very early, single contributor
• Not on Chrome Web Store, build from source
• Only ChatGPT and Claude today
• Relies on undocumented platform APIs

💰 Pricing Plans & Structure

Free

Pricing details are gathered from public sources and are subject to change. Please visit the official website for real-time rates and trial terms.

Pricing verified from official public sources · Reviewed by Bill (Lead Editor)

🎯 Who should use Kontext

Best suited for users focused on digital productivity and AI automation who value full-fidelity api capture, not lossy dom scraping.

⚠️ Who should look elsewhere

Users who require features outside its core scope or cannot accommodate very early, single contributor may benefit from exploring alternative tools in this category.

🚀 Common use cases

Brainstorming and drafting messages

Answering complex questions with citations

Coding help and debugging

⚖️ Direct Head-to-Head Comparisons

Curated Matchups

Compare Matrix → Free vs Free / Plus $20/mo

Kontext vs ChatGPT

Side-by-side analysis of features, scores, pros, and cons.

Compare Matrix → Free vs Free / Pro $20/mo

Kontext vs Claude

Side-by-side analysis of features, scores, pros, and cons.

Compare Matrix → Free vs Free / Advanced $20/mo

Kontext vs Google Gemini

Side-by-side analysis of features, scores, pros, and cons.

Compare Matrix → Free vs Free / Pro $20/mo

Kontext vs Microsoft Copilot

Side-by-side analysis of features, scores, pros, and cons.

❓ Frequently asked questions

Is Kontext free?

Kontext is completely free (Free).

What is Kontext used for and what are its strengths?

Key strengths of Kontext: Full-fidelity API capture, not lossy DOM scraping, On-device Gemini Nano summary, private, no key. An open-source Chrome extension that captures your full ChatGPT or Claude conversation via the platform API, summarizes it on-device with Gemini Nano, and hands a structured kontext to any other AI.

What is the best alternative to Kontext?

If you're looking for an alternative to Kontext, consider ChatGPT: it stands out for Advanced reasoning & voice, Multimodal GPT-4o.

How do I choose the right alternative to Kontext?

Selection advice: compare ratings, pricing, and core features within the AI Chatbots category, then match to your own workflow. See the comparison matrix and Top alternatives list on this page.