Document360Enterprise
AI knowledge base with semantic search and writing assistant — for both internal SOPs and customer-facing help.
Customer Support comparison
Document360 vs Plain
Pricing, pros, cons, and ideal use cases — side by side.
PlainPaid
B2B-first AI helpdesk. BYO-model (Claude, GPT-4, whatever), open APIs, native Linear and Slack sync. Built for SaaS support teams.
At a glance
| Document360 | Plain | |
|---|---|---|
| Pricing | EnterpriseNot published — each plan is quoted around workspaces, languages, team accounts and AI usage, with a 14-day free trial and no free tier. As read on the vendor's pricing page in early October 2026. | PaidNo free plan — a 7-day trial with no card required. Foundation $45 per user/month billed annually ($55 monthly), Horizon $99 per user/month billed annually, Frontier custom. As read on the vendor's pricing page in early October 2026. |
| Category | Customer Support | Customer Support |
| Ideal for | Any SMBEcommerceAgenciesProfessional Services | B2B SaaS companiesDeveloper-tools companiesTechnical SMBsAgencies supporting product clients |
Pros & cons
Document360
Pros
- AI writing assistant
- Semantic search
- Internal + external KB
- Version management
Cons
- Paid plans are expensive
- Setup takes time
- Free tier is limited
Plain
Pros
- BYO-model AI layer
- Best-in-class Linear and Slack integration
- First-class API
- Built for B2B patterns
Cons
- Not for consumer-scale ticket volume
- Smaller ecosystem than Zendesk
- Requires technical setup for full value
Which should you choose?
Plain is the lighter-weight option (Paid), while Document360 sits higher on the pricing ladder (Enterprise). Document360 is built around any smb; Plain leans more toward b2b saas companies. Shortlist the one whose strengths line up with your biggest constraint.
Still deciding between Document360 and Plain?
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