Aider vs Windsurf: pricing, quotas & features (2025)

AI pair programmer in your terminal — works with any LLM provider
vs. Agentic IDE (formerly Codeium) — Cascade AI flow + SWE-1.5 model

Data sourced from vendor documentation · Last updated May 2026

Aider (OSS) ↗Windsurf website ↗

Summary

Aider and Windsurf are both ai-coding platforms, addressing the same core use case with different implementation philosophies and trade-offs. Both offer a free tier, making it easy to prototype without a credit card. Windsurf offers paid plans from $20/month; Aider does not publish standard pricing. Aider has a broader documented feature set (15 vs 13 features). The right choice depends on your existing stack, team experience, and feature requirements. All pricing and quota data below is sourced from Aider and Windsurf's official documentation — not generated by AI or estimated.

Aider vs Windsurf: Comparativa de precios, cuotas y características (2025)

En esta comparativa analizamos Aider y Windsurf lado a lado — incluyendo precios mensuales, límites del tier gratuito, características técnicas, cuotas de uso (almacenamiento, transferencia, usuarios activos mensuales) y los interfaces de desarrollo disponibles. Todos los datos proceden de la documentación oficial de cada proveedor, no de respuestas generadas por IA.

Aider es una plataforma de la categoría ai-coding — AI pair programmer in your terminal — works with any LLM provider. Ofrece 2 tiers de precio: OSS (Apache-2.0) gratuito, LLM token cost (passthrough) gratuito. Su catálogo en Staxly documenta 15 características y 5 interfazes para desarrolladores.

Windsurf pertenece a la categoría ai-coding — Agentic IDE (formerly Codeium) — Cascade AI flow + SWE-1.5 model. Ofrece 6 tiers de precio: Free gratuito, Light gratuito, Pro desde $20/mes, Teams desde $40/mes. Su catálogo documenta 13 características y 5 interfazes para desarrolladores.

A continuación encontrarás los tiers de precio completos de ambas plataformas, una matriz de cuotas del tier gratuito (transferencia, almacenamiento, MAU, llamadas a la API y otros límites), el listado completo de características y los interfaces (CLI, SDKs, REST, GraphQL, MCP) disponibles para integrar cada servicio.

¿Necesitas estos datos en tu agente de IA (Claude Code, Cursor, Zed)? Instala gratis el servidor MCP de Staxly y tendrás acceso estructurado a Aider, Windsurf y más de 130 plataformas para desarrolladores.

Pricing tiers

Aider

OSS (Apache-2.0)

$0 forever. Apache-2.0 licensed. Install via pip. Bring your own LLM API key.

$0 base (usage-based)

LLM token cost (passthrough)

Only cost is your LLM provider bill — Claude Sonnet ~$3/M in, $15/M out; Groq + DeepSeek near-free.

$0 base (usage-based)

Aider (OSS) ↗

Windsurf

Free

Daily + weekly refresh of basic quota. Includes SWE-1.5 + Cascade (limited) + Tab.

Free

Light

Unlimited with daily + weekly refresh. Free higher quota tier.

$0 base (usage-based)

Pro

$20/month. All premium models. Fast Context. Usage billed at API price.

$20/mo

Teams

$40/user/month. Team + admin dashboard + RBAC.

$40/mo

Max

$200/month. Unlimited + all features.

$200/mo

Enterprise

Custom. Unlimited + SSO + SOC 2 + on-prem option.

Custom

Windsurf website ↗

Free-tier quotas head-to-head

Comparing oss on Aider vs free on Windsurf.

Metric	Aider	Windsurf
No overlapping quota metrics for these tiers.

Features

Aider · 15 features

Architect Mode — Large reasoning model plans → small editor model applies.
Browser UI — Optional Streamlit-based GUI on localhost.
Conventions File — .aider.conf.yml defines project rules.
Copy-Paste Mode — Paste web-chat output → aider parses + applies.
Git-Native Workflow — Each edit = git commit with descriptive message.
Multi-File Editing — Handles refactors across dozens of files.
Multi-LLM Support — Claude, GPT, Gemini, DeepSeek, Groq, local.
Public LLM Benchmarks — Maintains polyglot coding benchmark leaderboard.
Read-Only Mode — View changes without committing.
Repo-Map — Automatic project context summarization.
Terminal-Native UI — Runs in bash/zsh, no IDE required.
Test-Driven Mode — Runs tests after each edit, auto-fixes failures.
VS Code Extension — Launch aider from VS Code.
Vim / Neovim Plugin — Launch aider from editor.
Voice Coding — Transcribe voice → code.

Windsurf · 13 features

.windsurfrules — Project-level system prompts.
Bring Your Own Key — Use your OpenAI/Anthropic/Azure keys to bypass quotas.
Cascade — AI agent flow with read/write tool use across files.
Chat Panel — Sidebar chat with codebase context.
Command (inline edit) — Ctrl/Cmd+I → natural language edits.
Deploys — One-click deployment to Netlify + custom targets.
Fast Context — Optimized context retrieval engine for codebase queries.
Image Input — Drag screenshots into chat for context.
MCP Support — Hook MCP servers for extended tools.
Memories — Persistent notes Cascade can refer to.
Previews — Live preview pane inside IDE for web apps.
Tab Completions — Next-edit + inline completions, multi-cursor aware.
Terminal Integration — Cascade reads + writes terminal. Confirms risky ops.

Developer interfaces

Kind	Aider	Windsurf
CLI	aider CLI	Windsurf CLI
MCP	—	MCP Support
OTHER	.aider.conf.yml, Aider Browser UI, Aider VS Code Extension, aider.vim / neovim	.windsurfrules, JetBrains / Xcode / Eclipse / Neovim Plugins, Windsurf Desktop App

Key takeaways

Both Aider and Windsurf offer a free tier — Aider ("OSS (Apache-2.0)") and Windsurf ("Free") — with no credit card required to start.
Windsurf's entry paid tier (Pro) costs $20/month; Aider does not list public pricing.
Aider has a broader documented feature set (15 features) vs. Windsurf (13 features) in Staxly's catalog.
Developer integrations differ: only Windsurf offers MCP.

Staxly is an independent catalog of developer platforms. Some links to Aider and Windsurf may be affiliate links — Staxly may earn a commission if you sign up through them, at no extra cost to you. Pricing is verified against vendor pages at publication time — reconfirm before buying.

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