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Windsurf vs Aider

A feature-by-feature comparison of Windsurf and Aider across 7 capability categories.

First tool

Try Windsurf (opens in a new tab)

Second tool

Try Aider (opens in a new tab)

Modalities — Tie

Modalities: Windsurf compared with Aider
Feature	Windsurf	Aider
Text Input	Yes. Chat and inline prompting throughout the editor.	Yes, requires free plan. You chat in the terminal (or via editor comments) and Aider edits the repo.
Image Upload / Vision	Yes. Paste screenshots and mockups into the chat as context.	Yes, requires free plan. Homepage: add images to the chat for visual context and screenshots.
Image Generation	No. Does not generate still images.	No. A coding agent, not an image model.
Voice Mode	No. No voice interface.	Yes, requires free plan. Voice-to-code: speak feature requests, tests, or bug fixes.
Video Understanding	No. Does not analyse existing video.	No. Not a video-analysis product.
Video Generation	No. Not a video generation product.	No. Not a video generation product.
File Upload (PDF, DOCX)	Yes. Reads files from the open workspace and accepts attachments.	Yes, requires free plan. Works on the files in your git repo. That is the codebase, not a PDF uploader.
Code Execution	Yes. Cascade runs terminal commands and tests as part of an agentic loop.	Yes, requires free plan. Automatically lint and test after changes; can fix what those tools report.
Audio Input	No. No audio input.	Partial. Voice-to-code is live mic, not a general audio-file transcriber.
Canvas / Artifact Editor	Yes. The editor pane is the shared surface.	Unknown. Overlapping columns disagreed (no vs partial); left unverified rather than copying a no.
Screen Sharing / Computer Use	No. Operates on the codebase and terminal, not the screen.	No. No computer-use product.

Memory & Context — Windsurf Wins

Memory & Context: Windsurf compared with Aider
Feature	Windsurf	Aider
Persistent Memory	Yes. Memories persist project context across sessions.	Partial. Repo map plus git history persist. Optional conventions files. Not a hosted memory of you.
Large Context Window	Partial. Indexes the whole repository; the usable window depends on the selected model.	Unknown. Depends on the LLM you connect. No window is published as an Aider product spec.
Custom Instructions	Yes. Workspace rules files steer the assistant per project.	Yes, requires free plan. Config and conventions (comments in-editor, aider config) steer how it edits.
Conversation History	Yes. Cascade conversations are saved per workspace.	Yes, requires free plan. Terminal chat plus git commits are the history. You can undo with git.

Integrations — Windsurf Wins

Integrations: Windsurf compared with Aider
Feature	Windsurf	Aider
Web Search / Browsing	Yes. Can fetch documentation and web results as context.	Partial. You can add web pages to the chat as context. That is not a live search box.
Plugins / Extensions	Partial. MCP servers extend it, rather than a first-party plugin marketplace.	No. No plugin marketplace. It is a CLI you script.
API Access	No. An IDE product, not an API.	No. Aider consumes LLM APIs. It is not a hosted Aider REST generate API.
Zapier Integration	Unknown. Not confirmed either way.	No. No Zapier integration is documented.
Custom GPTs / Bots	Partial. Workflows and rules rather than shareable custom agents.	No. No bot store.
Real-time Collaboration	Unknown. Not confirmed either way.	No. Single-user CLI. Share via git.
Live Social Data Integration		No. No live social firehose.
Live Citation Mapping		No. Not a cited-search product.

Developer — Windsurf Wins

Developer: Windsurf compared with Aider
Feature	Windsurf	Aider
Function Calling	Yes. Tool calling drives the agentic editing loop.	Yes, requires free plan. Edits files, runs linters/tests, and commits. That is tool use, not chat-only.
Streaming Responses	Yes. Responses stream into the editor as they are produced.	Unknown. Streaming depends on the connected LLM. Not documented as an Aider API guarantee.
Fine-Tuning	No. No custom model training.	No. You pick a model. Aider does not train weights.
Embeddings API	No. No embeddings endpoint.	No. Repo map is not a public embeddings API.
Structured Output (JSON)	No. Not a language model, so this does not apply.	No. Output is code diffs/commits, not JSON schema.
Reasoning / Thinking Mode	Yes. Available through the frontier models it can be pointed at.	Unknown. Overlapping columns disagreed (yes vs partial); left unverified rather than copying a no.
Local Execution		Yes, requires free plan. The program runs on your machine. Models can be local or cloud APIs you configure.
Open Weights		Partial. Aider itself is open source on GitHub. It can drive local open-weight LLMs; it is not a model release.
Multi-Agent Orchestration		No. One pair-programmer process, not a multi-agent swarm product.

Platforms — Windsurf Wins

Platforms: Windsurf compared with Aider
Feature	Windsurf	Aider
Web App	No. Desktop editor only.	No. No Aider web IDE. Optional copy/paste to a vendor web chat.
iOS App	No. No native mobile app; the web app runs in a mobile browser.	No. Terminal tool, no iOS app.
Android App	No. No native mobile app; the web app runs in a mobile browser.	No. Terminal tool, no Android app.
Desktop App	Yes. A desktop IDE, forked from VS Code.	No. Installs as a Python CLI, not a branded desktop app.
Chrome Extension	No. No official browser extension.	No. No Chrome extension.

Privacy — Windsurf Wins

Privacy: Windsurf compared with Aider
Feature	Windsurf	Aider
GDPR Compliant	Yes. Codeium publishes a DPA and serves EU customers.	Unknown. You send code to whichever LLM you configure. No Aider DPA was read.
Opt Out of Data Training	Yes. Zero-data-retention mode is available; enterprise plans do not train on your code.	Unknown. Training policy is the LLM vendor’s, plus whatever you self-host.
Enterprise Privacy Mode	Yes, requires enterprise plan. Self-hosted and VPC deployment options for enterprise.	Partial. You can point it at local/self-hosted models so code never leaves the machine. No Aider enterprise SKU.

Workspaces — Tie

Workspaces: Windsurf compared with Aider
Feature	Windsurf	Aider
Projects / Folders	Yes. Organised by workspace.	Yes, requires free plan. The git repo is the project. Codebase map covers the tree.