ArchiveWeek 14/2026 · 5 April 2026

5 AI toolsof the week

Text, design, data / knowledge, research and agents: one tool each, checked for value, cost and data protection.

The week in brief

Week 14/2026 marks a landmark week for open-source AI: Google released Gemma 4 under the Apache 2.0 licence for the first time, a shift that directly challenges proprietary cloud models. H Company's Holo3 sets a new standard for computer-use agents with 78.85% on the OSWorld benchmark, ahead of GPT-5.4 and Claude Opus 4.6, as a European company under Apache 2.0. In data protection, Atomic Chat stands out: the open-source tool runs completely offline on the Mac, without a single byte leaving the device. The week is rounded off by Noon leaving stealth mode with 44 million dollars for the first AI-native design tool on production code, and by Perplexity Computer's new tax module for US tax returns.

Google Gemma 4 (9.5/10): a milestone, frontier open-source AI under Apache 2.0, from Raspberry Pi to H100, fully GDPR-compliant on-premise
Trend: open source overtakes cloud AI. Gemma 4 (Apache 2.0) and Holo3 (Apache 2.0, EU) show that near-frontier AI quality is now available on-premise, free and without licence risk
Shift: from all-in-one to specialised solutions

This issue dates from before the English edition launched in October 2026. Summaries and short descriptions are translated; the detailed reviews are available in German. Detailed review in German →

01Text

Atomic Chat

8.5/10 Relevance

Open-source ChatGPT alternative: 1,000+ AI models fully offline on the Mac, zero data exfiltration

Visit Atomic Chat →Detailed review in German

02Design

Noon

7.5/10 Relevance

The first AI-native design tool on production code, 44M dollars in funding, out of stealth mode

Visit Noon →Detailed review in German

03Data / Knowledge

Google Gemma 4

9.5/10 Relevance

Frontier open-source AI under Apache 2.0, from Raspberry Pi to H100, GDPR-compliant on-premise

Visit Google Gemma 4 →Detailed review in German

04Research

Perplexity Computer for Taxes

7.8/10 Relevance

First agentic tax assistant: fills in IRS forms, checks returns, optimises deductions

Visit Perplexity Computer for Taxes →Detailed review in German

05Agents

Holo3 by H Company

9.2/10 Relevance

State-of-the-art computer-use agent, 78.85% on OSWorld, open source Apache 2.0, European company

Visit Holo3 by H Company →Detailed review in German

The detailed version with all research notes is available in German.

Full analysis (German)