Plain vs Sellio

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Plain compared with Sellio
Detail	Plain	Sellio
What it does	AI support infrastructure for B2B teams built composable and API-first	AI customer support in one shared inbox with live chat, WhatsApp, Instagram, Telegram, and email
Stage	Not given	Startup
Founded	Not given	2025
Based in	Not given	MA
Pricing model	Paid	Freemium
Pricing	Foundation plan $45/user/month billed annually with 1,000 credits/month; Horizon plan $99/user/month billed annually with 2,500 credits/month; Frontier plan with custom pricing for larger organizations. 7-day free trial available with no credit card required.	Free plan with shared inbox and website chat, 2 seats, and 5 AI conversations included. Mini plan at $20/month with 5 seats and $5 included AI credits. Essentials at $95/month with 10 seats and $25 included AI credits. Plus at $295/month with 50+ seats and $75 included AI credits. Annual billing ava
Key features	Ari AI agent for customer interactions Sidekick internal AI assistant Unified inbox for Slack, Teams, Discord, and email Workflow automation and auto-routing Insights for trend detection and analytics API-first architecture and GraphQL Help Center and knowledge base Lookup codebase integration powered by Cursor	Shared inbox for all customer conversations Live chat widget with one-line installation Multi-channel support: website chat, WhatsApp, Instagram, Telegram, email AI agents trained on your own knowledge base and docs Ticketing system for ongoing work Workflow automation builder Team assignment and routing rules Support analytics and CSAT ratings Desktop app for macOS with Windows coming soon Conversation history and context preservation across channels
What makes it different	Composable, API-first infrastructure allows building anything no-code or all-code Multiple AI agents orchestrated together with human control Designed and stress-tested by fast-growing teams Enterprise-level security built for everyone	All channels in one inbox instead of requiring separate tools AI agents trained on your own docs rather than generic responses Free plan forever with no time limits or card required Significantly cheaper pricing than Zendesk, Intercom and LiveChat Designed for simplicity with no complex enterprise software required
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	73 +1 (up) since last check	15 +1 (up) since last check
Trust Flow (Majestic)	29	5
Citation Flow (Majestic)	51	31
Referring domains (Majestic)	3033	61

5 details filled in for both companies.

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