リファクタリング、監査、移行のための OpenAI のオープンソースターミナルエージェントです。
コード実行ツール利用
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Aider vs Windsurfwhich AI code agent should you pick in 2026?
OSS terminal coding assistant — pair-programs, edits in place, commits as you go.
CodeTool use
Aider vs Windsurf — specs
| Spec | Aider | Windsurf |
|---|---|---|
| Agent Rank | 70 / 100 (B) | 80 / 100 (A) |
| Autonomy | Semi-autonomous | Semi-autonomous |
| Pricing | Free · OSS | Freemium · from $15 |
| Open source | Yes | No |
| Capabilities | Code, Tool use | Code, Tool use, Memory, Browser |
| Integrations | 2 apps | 2 apps |
| Verified | Verified | Verified |
| Released | Jan 2025 | Apr 2025 |
Agent Rank breakdown
Aider
Agent Rank
70/ 100
- 自律性
- 8
- 機能
- 4
- 連携
- 4
- 料金
- 10
- 完成度
- 6
- 検証性
- 10
自律性、機能、連携、料金、成熟度、編集部の検証を基に自動算出。デプロイごとに更新されます。 どのように算出されているか?
Windsurf
Agent Rank
80/ 100
- 自律性
- 8
- 機能
- 8
- 連携
- 4
- 料金
- 8
- 完成度
- 10
- 検証性
- 10
自律性、機能、連携、料金、成熟度、編集部の検証を基に自動算出。デプロイごとに更新されます。 どのように算出されているか?
Pros & cons
Aider
メリット
- +Best-in-class pair-programming flow in the terminal
- +Repo map mode handles surprisingly large codebases
- +Provider-agnostic — bring any LLM that supports tool use
デメリット
- −No UI — pure CLI is a deal-breaker for some teams
- −Token spend at heavy use rivals a paid SaaS plan
- −Less polished autonomy than Devin or Replit Agent
Windsurf
メリット
- +Cascade agent flows are the strongest "watch it work" UI in any IDE-native agent
- +Cheapest Pro tier in the category at $15/month
- +Codeium has a deep model team — completion quality consistently leads
デメリット
- −Smaller ecosystem of extensions than Cursor
- −Pro Ultimate ($60) is opaque on which models are actually premium
- −Memory feature less mature than Cursor + Claude Code memories
Pricing
Aider
Open source
無料
Everyone
- +Apache-2.0 license
- +BYO model key (any provider)
- +Voice mode, repo map, auto-commit
Windsurf
Free
無料
Trial
- +Limited Cascade flow runs
- +Standard models
- +Editor + chat
おすすめ
Pro
$15/月
Working engineers
- +Unlimited Cascade flows
- +All Pro models
- +Background agents
- +Memories
Pro Ultimate
$60/月
Power users
- +Highest model priority
- +Premium models included
- +Higher concurrency
Teams
$35/席/月
Teams
- +SSO + admin
- +Usage analytics
- +Shared memories
Which one should you pick?
Aider
Pick Aider if cost is the main constraint or if auditability or self-hosting matters.
Try Aider →Windsurf
Pick Windsurf if its specific capabilities (Code, Tool use) match what you need.
Try Windsurf →Affiliate links. We may earn a commission at no extra cost to you.
Frequently asked
Should I pick Aider or Windsurf in 2026?+
Pick Aider if cost is the main constraint or if auditability or self-hosting matters. Pick Windsurf if its specific capabilities (Code, Tool use) match what you need. Most working teams running both can use Aider for primary work and Windsurf for the workflows where its specific strengths matter.
What's the price difference between Aider and Windsurf?+
Aider starts at Free · OSS; Windsurf starts at Freemium · from $15. Aider is the cheaper entry option. For team deployments the TCO can differ — use the AI Agent Rank TCO calculator for your specific volume.
Which is more autonomous, Aider or Windsurf?+
Both Aider and Windsurf are Semi-autonomous agents — neither has a meaningful autonomy advantage over the other. The decision should hinge on capabilities and pricing instead.
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Adjacent agents in the same category with overlapping capabilities — worth a side-by-side glance before you commit.
IDE 内で動作するオープンソースの自律的なコーディングエージェントです。
コード実行ツール利用ブラウザ操作Demo · hover to playVS Code と JetBrains 向けのオープンソースコーディングAIエージェント — 任意のモデルを接続し、プロンプトを自由にカスタマイズできます。
コード実行ツール利用メモリDemo · hover to play
See more alternatives: alternatives to Aider · alternatives to Windsurf
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