Plain
The AI Support Stack Built for B2B
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Quick Answer
AIPlain is an AI support infrastructure for B2B teams, enabling them to build and scale customer support operations. It offers native integrations with Slack, Microsoft Teams, Discord, and various CRMs, alongside its own Ari and Sidekick AI agents. Plain is best for technical and fast-growing B2B teams adopting AI for customer support. Paid plans start from $45/user/month, billed annually, with a 7-day free trial.
Plain is an AI support infrastructure for B2B teams, enabling them to build and scale customer support operations. It unifies conversations from multiple channels, orchestrates AI agents, and automates workflows. Plain is API-first, offering complete extensibility for custom solutions.
Plain is an API-first support platform that allows B2B teams to orchestrate multiple AI agents alongside human teammates, offering complete extensibility to build custom support infrastructure.
Decision Intelligence
Best For
AIType
Starting Price
$45/mo
Billing Cycle
Annual
Free Trial
Yes
Credit Card
Not Required
Free Plan
No
Dimension Scores
· 6.0 avgHow good it is, across universal quality axes
Task Scores
· 7.5 avgWhat it can do, per category it works in · showing 10 of 10 tasks scoring 5+
Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →
- -Foundation plan includes 1,000 credits/month, Horizon 2,500 credits/month
- -Foundation plan is limited to 25 Slack channels and 2 email addresses
- -Foundation plan includes only 1 Knowledge Base and Customer inbox
- -Reporting history is limited to 7 days on the Foundation plan
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The HubSpot Customer Platform — software & tools for your business
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The agentic platform for support teams
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Demo
Open demoCompliance audit trail
4 events- Subprocessors
Adding xAI and Baseten to subprocessor list.
2mo ago · 2026-08-31 · source
- Subprocessors
Adding Salesforce to subprocessor list as a CRM integration.
7mo ago · 2026-04-14 · source
- Subprocessors
Adding Hubspot to subprocessor list as our CRM.
7mo ago · 2026-03-23 · source
- Subprocessors
Adding Hyperline to our sub-processor list for billing operations.
8mo ago · 2026-03-04 · source
The Model(s) Behind It
Model details — extracted from public vendor sources by our pipeline (AI extraction plus a source check) or admin-entered. Shown as claimed by the vendor; not independently audited by Intelloro.
Pricing verified from the vendor pricing page.
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Who It's For1 rolesCustomer Service Representatives
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Platform, Content & Languages3 content types1 languagesTextEmailChatbotEnglish+4 more
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Frequently Asked Questions
What can Plain do?
Plain can: Multi-channel conversation consolidation (Slack, MS Teams, Discord, email, chat, portal), Internal AI assistant (Sidekick) for team research, triage, and resolution, Customer-facing AI agent (Ari) for autonomous support and escalation, Workflow automation with AI conditions, branching logic, and time-based delays. Best for: B2B teams whose support needs outgrow a fixed feature set.
How much does Plain cost?
Plain is a paid tool starting from $45 (billed annually) with a free trial available.
Is Plain free?
Plain is a paid tool, but offers a free trial so you can evaluate it before committing.
What makes Plain unique?
Plain is an API-first support platform that allows B2B teams to orchestrate multiple AI agents alongside human teammates, offering complete extensibility to build custom support infrastructure.
Does Plain have an API?
Yes, Plain offers a public API for developers to integrate its capabilities into custom applications and workflows.
What platforms does Plain support?
Plain is available on web, API, Slack, and Microsoft Teams.
What languages does Plain support?
Plain supports English.
Who is Plain for?
Plain is designed for B2B teams whose support needs outgrow a fixed feature set; Technical teams who want to build on an API rather than file feature requests; Fast-growing companies whose volume and process change faster than a vendor ships.
Trust Score
Excellent
Based on 11 data signals
Evidence: 8 of 11 expected facts verified
Evidence strength: Strong
Reflects publicly available data, not an independent audit
Not yet checked
Some details are AI-generated estimates — verify with the vendor.
AI-generated estimate: Best For, Description, Limitations, Quick Answer, Tagline, What Makes Unique
How we source dataAI Governance & Regulatory Disclosures
Legally-sensitive fields — extracted from public vendor sources by our pipeline (AI extraction plus a source check) or admin-entered. Shown as claimed by the vendor; not independently audited by Intelloro.