Google Search

Search engines · 7の代替ツール

The gateway to information. Search engines tie into browsing history, location, and your Google account—feeding intent data into the ad ecosystem.

なぜ Google Search から離れる?

Search queries are among the most sensitive intent data you produce. Google Search links ads, personalization, and long-retained history to a detailed picture of your interests, worries, and buying intent.

Googleの限界・リスク

  • Search history, location, and device data link to your Google account and feed ad profiles
  • Sponsored slots blur with organic results; commercial bias can shape what you see
  • Personalization builds filter bubbles and makes diverse viewpoints harder to reach
  • Results vary by region, language, and device—raising questions about neutrality and reproducibility

選び方ガイド

全部試す必要はありません。あなたの優先順位に合わせて絞り込みましょう。

  1. 1 Try DuckDuckGo or Brave Search free for a week and judge everyday search quality
  2. 2 If you want zero ads and maximum privacy, consider paid Kagi
  3. 3 For full data sovereignty, self-host SearXNG or use a trusted public instance
  4. 4 For EU legal protection plus Google-like quality, compare Startpage and Qwant

クイック比較

プライバシー・使いやすさ・機能・コスパの4軸で評価しています。

詳細比較表 →
ツール Privacy Ease of use Features Value 総合
DuckDuckGo 18/20
Kagi 17/20
Brave Search 18/20
SearXNG 15/20
Startpage 17/20
Mojeek 16/20
Qwant 16/20

すべての代替ツール(7)

#1

DuckDuckGo

The go-to privacy-first search engine

★★★★

A privacy-focused general search engine that does not save search history. Bangs (!w, !g, etc.) let you jump directly to other engines.

  • 検索履歴を保存しない
  • トラッキング広告なし
  • 日本語対応が良好
  • Bangsで他エンジンへ即ジャンプ

⚠ Bing等の第三者インデックスに依存

Free Easy Read more →
#2

Kagi

Premium search with zero ads

★★★★★

A paid human-centric search engine with no ads, customizable sources, AI summaries, and Lens search.

  • 広告・スポンサー枠ゼロ
  • Lens/Teclis等複数インデックス統合
  • ソースのブロックリストとカスタマイズ
  • AI要約(Summarizer)内蔵

⚠ 月額$5〜の有料サブスクリプション

Paid Easy Read more →
#3

Brave Search

Free privacy search on an independent index

★★★★

Brave’s independent-index search. Goggles let you customize result sources; Discussions surfaces forum threads alongside web results.

  • 独自Webインデックス(Google/Bing非依存)
  • Gogglesで結果フィルタリング
  • DiscussionsタブでReddit等の議論
  • API提供(Brave Search API)

⚠ インデックスはGoogleより規模が小さい

Free Easy Read more →
#4

SearXNG

The self-hostable meta-search standard

★★★★★ OSS

Open-source meta-search that merges results from many engines. Self-host for full data sovereignty.

  • 完全オープンソース(AGPL-3.0)
  • 70以上の検索エンジンを統合
  • トラッキング・プロファイリングなし
  • Docker/Helmで容易にデプロイ

⚠ 公開インスタンスの信頼性・可用性に差

Self-hosted Advanced Read more →
#5

Startpage

Google-quality results, anonymized

★★★★

Delivers Google search results through an anonymous proxy so you get Google quality with privacy protection.

  • Google検索結果を匿名プロキシ経由で取得
  • EU(オランダ)法域で運営
  • Anonymous Viewでサイトを匿名閲覧
  • トラッキングCookie不使用

⚠ Googleインデックス依存のためGoogleの制約も受ける

Free Easy Read more →
#6

Mojeek

Twenty years of independent crawling

★★★★★

UK independent crawl-based search engine with 20+ years of its own index, operated privacy-first.

  • 完全独自クロールインデックス
  • Google/Bing API非依存
  • 検索履歴・プロファイル不使用
  • 20年以上のインデックス構築実績

⚠ インデックス規模はGoogleより大幅に小さい

Free Easy Read more →
#7

Qwant

Privacy-respecting search from the EU

★★★★

French privacy search engine under EU law, with Junior (kids), Maps, and related services.

  • EU(フランス)法域で運営
  • 検索履歴・プロファイル不使用
  • Qwant Junior(子供向け安全検索)
  • Qwant Maps(OpenStreetMapベース)

⚠ Bingインデックスに部分的に依存

Free Easy Read more →

Related on Amazon

Books and devices that may help your migration. Verify specs and price before buying.

  • Books

    Permanent Record — Edward Snowden

    Essential reading on surveillance and personal privacy—the “why” behind de-Googling.

    View on Amazon ↗

移行のヒント

  1. 1 Changing your browser’s default search engine gives instant impact
  2. 2 Also use settings that avoid saving history (private mode + logged out)
  3. 3 Result quality varies by region and language—try two engines and compare
  4. 4 DuckDuckGo Bangs (!g etc.) let you fall back to Google only when needed