Side by side
Capacity vs Shelf
Both stand on ai knowledge base software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Paid AndroidAPIExtension+2
Consider Capacity if your contact center needs multi-channel AI agents, agent tools, and broad integrations, particularly at mid-market or enterprise scale. Look elsewhere if you need a free plan or pricing you can evaluate without requesting a quote.
Visit Capacity Paid APIWeb
Shelf combines knowledge governance, contextual processing, integrations, and developer access for enterprise deployments. Its custom pricing and WebSocket requirement are important purchasing considerations.
Visit ShelfThe facts
| Capacity | Shelf | |
|---|---|---|
| Free plan | No | Not published |
| Open source | No | Not published |
| Runs on | Android, API, Extension, iPhone, Web | API, Web |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 3 | 1 |
| Maker | Capacity | Shelf |
| Website | capacity.com | shelf.io |
| On ai knowledge base software | #22 of 36 | #34 of 36 |
Capacity: what it does well
- AI agents support chat, SMS, voice, and email.
- Includes real-time agent assist, auto QA, and conversation intelligence.
- Lists 273 integrations, including Salesforce and Zendesk.
- States GDPR, HIPAA, and SOC 2 Type II compliance.
- Role-based permissions, audit logs, and single sign-on integrations are available.
What to know first
- There is no free plan.
- Pricing is available only on request.
- Usage is metered by channel and agent hours.
Shelf: what it does well
- Structures documents and other knowledge for people and AI
- Cortex adds context, governance, and quality monitoring
- Connectors include SharePoint, Salesforce Knowledge, and Confluence
- API-first design includes Python and Node SDKs
- Supports SSO, SCIM, and group-based permissions
What to know first
- Enterprise pricing requires contacting Shelf for a quote
- Web features require WebSocket support and firewall access
- Paid product with no listed free plan
Alternatives to Capacity Alternatives to Shelf The whole list