MCP Marketplace Comparison: Where to Find and Sell AI Skills in 2026
A detailed comparison of every MCP and AI skill marketplace — features, pricing, audience, and which one is right for your needs.
The Marketplace Landscape
The MCP and AI skill marketplace ecosystem has grown rapidly. Several platforms compete, each with different strengths, audiences, and business models. Here's a comprehensive comparison.
Comparison Matrix
| Platform | Focus | Pricing Model | MCP Native | A2A Support | European |
|---|---|---|---|---|---|
| SkillExchange | Full marketplace | Per-use + subscription | ✅ | ✅ | ✅ |
| MCP.so | Directory | Free listing | ✅ | ❌ | ❌ |
| Smithery.ai | Developer tools | Freemium | ✅ | ❌ | ❌ |
| Composio.dev | Integration hub | SaaS | ❌ | ❌ | ❌ |
| GitHub Topics | Open source | Free | ❌ | ❌ | ❌ |
SkillExchange
Best for: Creators who want to monetize, enterprises that need compliance
Strengths:
- Only marketplace with built-in payment processing (Stripe)
- European-first (GDPR, DORA compliance)
- MCP + A2A protocol support
- Fiat payments (no crypto required)
- Quality assurance infrastructure
Weaknesses:
- Newer platform (launched 2026)
- Smaller catalog than open directories
MCP.so
Best for: Discovery and open-source sharing
Strengths:
- Large catalog of MCP servers
- Free to list and use
- Community-driven
Weaknesses:
- No payment infrastructure
- No quality assurance
- No A2A support
- Not European-hosted
Smithery.ai
Best for: Developer tooling and testing
Strengths:
- Good developer experience
- Integration testing tools
- Growing community
Weaknesses:
- Limited to developer audience
- No consumer marketplace
- No European compliance infrastructure
Composio.dev
Best for: Integration-heavy use cases
Strengths:
- Large integration catalog
- Good API design
- Enterprise features
Weaknesses:
- Not MCP-native (proprietary protocol)
- SaaS lock-in
- US-based (GDPR concerns for EU users)
Choosing the Right Marketplace
For Creators
- Primary: SkillExchange (monetization, compliance, global reach)
- Secondary: List on MCP.so for discovery (link back to SkillExchange for purchase)
For Enterprises
- Primary: SkillExchange (compliance, quality, payment infrastructure)
- Secondary: Direct GitHub for open-source evaluation
For Developers
- Primary: SkillExchange + Smithery.ai
- Secondary: GitHub for open-source contributions
The Future of AI Marketplaces
The marketplace ecosystem is consolidating. We expect:
- Winner-takes-most dynamics: The marketplace with the most buyers attracts the most sellers, creating a flywheel
- Protocol standardization: MCP and A2A become universal, reducing platform lock-in
- Vertical specialization: General marketplaces complemented by vertical-specific ones
- Enterprise procurement integration: Marketplaces integrate directly with enterprise procurement systems
SkillExchange is positioned to be the leading marketplace due to its European-first approach, payment infrastructure, and MCP+A2A support.
Conclusion
For most creators and enterprises, SkillExchange offers the best combination of monetization, compliance, and reach. Use open directories like MCP.so for additional discovery, but route transactions through a marketplace that handles payment, quality, and compliance.