fx (by Vercel) vs. IBM Bob

Feature	fx (by Vercel)	IBM Bob

Tagline	Tiny, open, embeddable, native coding agent by Vercel.	Your AI SDLC (Software Development Lifecycle) partner from IBM
Website	https://fx.sh	https://bob.ibm.com
Language	zig	javascript
Release Date	August 17, 2026	September 2, 2025
Last Updated	August 19, 2026	May 20, 2026
Provider Type	Independent	AI Lab
MCP Support	Yes	Yes
Multi-Agent Support	No	Yes
Git Integration	minimal	deep
Multi-File Editing	Yes	Yes
Auto Test Running	No	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	No
IDE Integration		Bob IDE
Hooks / Extensions	No	Yes
Web Search	Yes	Yes
Local Model Support	Yes	No
Context Window	Model dependent	Model-dependent
Supported Models	All Vercel AI Gateway supported models, including OpenAI, Anthropic, Google, DeepSeek, z.AI, Moonshot, etc	Multi-provider (IBM-managed)
Pricing Model	Free, BYOK, Usage Based	Freemium
Free Tier	No	Yes
Price Range	0 - $20 / mo / Custom (Vercel AI Gateway)	Free / $20-200/mo
Source Code Availability	Open Source (Apache-2.0)	Proprietary Software
Source Code	https://github.com/vercel-labs/fx	https://github.com/IBM/ibm-bob
Development State	active	active