Plain
AI support infrastructure that unifies Slack, Teams, email and in-app conversations into one queue where human and AI agents work the same
Plain earns its place when your support process is genuinely yours to define and someone on the team can lean on an API that mirrors the app. Ari's 100-credits-per-resolution pricing is unusually legible, so you can actually forecast AI spend instead of guessing. Just don't buy it expecting an out-of-box ticketing system with default workflows — if your team lives in email and wants someone else's opinions, Zendesk or Help Scout will ask less of you.
Verified 2d ago · liveness 85/100 · cite: rightaichoice.com/tools/plain
- B2B product teams consolidating Slack, Teams, Discord, email and in-app support into one queue
- Engineering-heavy support orgs that want an API-first platform where everything is programmable
- Slack-first support teams that want Sidekick answering from customer history, help center articles and MCP tools
- Teams linking support threads to GitHub PRs, Linear issues and PagerDuty incidents
- Small teams with low ticket volume and simple email-only support
- Organizations that want a rigid out-of-box ticketing structure with default workflows
- Security-conscious buyers who need SSO and SCIM without moving to the custom-priced Frontier tier
We scan live Reddit threads, YouTube comments, X posts, G2 reviews and other communities — and hand you an honest verdict in under a minute.
- Honest verdict, not marketing
- Real pros & cons from real users
- Attributed quotes with receipts
3 free scans · no card needed
Skip Plain if you want a fixed, out-of-box ticketing system with default workflows and nobody on your team can work with an API — Help Scout or Zendesk will ask less of you.
Foundation's 1,000 monthly credits go fast once Ari handles volume — Ari bills 100 credits per resolution, so roughly 10 AI-resolved tickets consume the entire month's allowance.
Foundation at $45/user/month billed annually fits small teams up to 5 member seats; Horizon at $99/user/month billed annually fits growing teams needing Teams, Discord, SLAs and CRM sync; Frontier is custom for SSO, SCIM, HIPAA and custom credits. Cheaper than most enterprise help desks at entry, but credit overages and agent usage can push real spend above a flat-rate Zendesk or Intercom seat.
In short
Plain — AI support infrastructure that unifies Slack, Teams, email and in-app conversations into one queue where human and AI agents work the same. Best for B2B product teams consolidating Slack, Teams, Discord, email and in-app support into one queue, Engineering-heavy support orgs that want an API-first platform where everything is programmable, Slack-first support teams that want Sidekick answering from customer history, help center articles and MCP tools. Free to start; paid plans from $45/user/mo.
What's new in Plain
Checked todayAcross the latest 10 updates: 5 feature updates, 1 launch, 3 changelog entries and 1 news mention.
Plain Weekly Drop: October 9, 2026
Slack setup testing, a redesigned notifications bar and settings, plus updates to Broadcasts, the MCP, and the CLI.
Ari Customer Agent can be enabled for select threads only
Ari can now run on a chosen set of live threads, manually or via workflow, instead of the entire workspace.
AI label and priority assignment in Workflows
Workflow steps can now use AI to set labels and priority on threads automatically.
The Support Leader's Playbook: Your Customers Should Need Less Support
Plain blog post on turning tickets into fixes and the three metrics support teams use to show it worked.
Plain Weekly Drop: October 2, 2026
Internal Agent workflow steps can call custom MCP tools; manual workflows run across a whole queue; Customer Agent closes completed threads.
Broadcasts launches in Plain sidebar
Broadcasts now ships in Plain with shared login and permissions, letting teams message every customer channel from the sidebar.
Knowledge gaps turn customer questions into help center articles
Plain now surfaces recurring customer questions as draft help center articles to grow the knowledge base.
Plain Weekly Drop: September 25, 2026
Customizable thread sidebar, webhook failure alerts, identity-directory user management, and two new Ari capabilities.
Link GitHub PRs to threads by pasting the URL
Pasting a full GitHub pull request link into the search bar now links it to a thread.
Faster onboarding for new Plain workspaces
New workspaces start preloaded with label suggestions, Slack teammate suggestions, and test threads.
What people actually say about Plain — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
78 mentions across 5 sources (Hacker News, Product Hunt, Stack Overflow, GitHub, Lemmy) · researched Aug 18, 2026.
Average across the 5 sources that answered — each source counts once, not each post.
- +Clean, minimal interface that users consistently praise for simplicity.
- +Forces users to decisively process emails, reducing inbox clutter.
- +Simple option set makes triage quick and visually pleasant.
- +Active development with a roadmap toward 1.0 and community engagement.
- +API-first architecture and MCP support attract developers seeking extensibility.
- −Switching from Gmail requires abandoning established habits and investments.
- −Forced individual action on each email, with no bulk mark-as-read or spam option.
- −Onboarding process needs improvement according to some Product Hunt users.
- −Admin pages rendering issue reported on GitHub after standard setup.
- −Sparse first-hand community feedback limits confidence in real-world reliability.
- • Sidekick is free only until July 13, 2026, after which it may become a paid add-on.
- • AI features in Pro tier have usage limits that may require upgrades for heavy use.
Viability Score
How well maintained and how widely used is Plain? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: October 2026
How we score →Key Features
- Unified inbox for Slack, Microsoft Teams, Discord, email, live chat, in-app forms, contact forms and a headless portal
- Ari customer AI agent triages requests, investigates issues and replies at 100 credits per resolution
- Ari asks clarifying questions when a customer's message is vague
- Ari closes completed threads automatically (October 2026)
- Sidekick internal AI agent drafts replies and finds answers inside Plain or Slack via keyboard shortcut
- Sidekick connects to any MCP server, including internal tools and data platforms
- Internal Agent workflow steps can call your own MCP tools (October 2026)
- Manual workflows can run across an entire queue at once
- Broadcasts: message every connected customer channel from the left sidebar
- Knowledge gaps surfaces real customer questions to grow the help center
- Workflows with triggers, conditions and waits, plus auto-labelling, urgency detection and thread summaries
- AI-driven thread routing by context or tone
- Bring your own models and agents, or run several AI agents alongside human teammates
- Everything in the app is available through the GraphQL API, webhooks, events and MCP
- Customer cards pull your own system data into the thread, refreshed every 15s
About Plain
Plain is AI support infrastructure for B2B teams that would rather assemble their own support stack than accept a vendor's fixed opinions. Conversations from Slack, Microsoft Teams, Discord, email, live chat, in-app forms, contact forms and a headless portal all land as threads in one customer inbox, where human teammates and AI agents work the same queue. The platform is API-first: everything you can click, you can also do programmatically, and workflows extend into your own systems. Two agents ship in the box. Ari handles the customer-facing side — triaging requests, investigating issues, replying at 100 credits per resolution, asking clarifying questions on vague messages, and closing completed threads automatically. Sidekick is the internal assistant that drafts replies and finds answers inside Plain or Slack from a keyboard shortcut, with a connection to any MCP server including internal tools and data platforms. You can also bring your own models and agents, or run several side by side, while humans keep control of complicated conversations. Workflows run on triggers, conditions and waits — auto-routing by context or tone, creating Linear or Jira issues, triggering PagerDuty or Rootly incidents, or calling your own API. The October 2026 releases let Internal Agent workflow steps call your own MCP tools, let manual workflows run across an entire queue, and added Broadcasts for messaging every customer channel from the left sidebar. The September 2026 Knowledge gaps feature surfaces the questions customers actually asked so your help center grows from real demand rather than guesswork. It fits engineering-heavy B2B teams whose support process outgrew a fixed feature set — not low-volume, email-only operations that want defaults out of the box.
Behind the Verdict
Buy Plain when support is a system you want to own rather than a product you want to be handed. The pitch is infrastructure: connect channels, orchestrate every conversation, extend anything through the API and MCP. It rewards teams that already think in queues, workflows and integrations. The MCP story is the sharpest part right now. Sidekick reaches into any MCP server, and the October 2026 drop lets Internal Agent workflow steps call your own MCP tools — meaning an internal agent can act on your systems mid-thread, not just talk about them. If you run several agents side by side, Plain is one of the few places that coordinates them instead of forcing one bundled bot on you. Pass when the shape of your support doesn't need custom logic. A ten-person team with an inbox and a help center gets very little out of triggers, conditions and waits — and will pay for the privilege. Also pass if you need SSO and SCIM without a sales cycle: those sit on Frontier, and Frontier is priced by conversation. Budget carefully. The $45/user/month Foundation tier includes only 1,000 credits per month, Ari burns 100 per resolution, and Sidekick runs 15-300+ depending on effort. Credit top-ups start at $10 for 1,000. Run the maths against your real ticket volume before you commit, and remember Member seats cap at 5 on Foundation. Watch the newer edges. Broadcasts and machine users replying as a human teammate are genuinely useful — and the latter can blur attribution in Slack and email if your team doesn't set ground rules. Comparing against Zendesk or Intercom? Plain trades their rigid defaults for flexibility you have to configure. Its closest philosophical sibling is something like Raycast: opinionated about speed and workflows, not about your processes.
Researching Plain? Get your full AI stack in 60 seconds.
Free, no signup — tell us your goal and get tools matched to your budget & existing stack.
Real-world workflow fit
Concrete scenarios for the personas Plain actually fits — and what changes day-one when you adopt it.
Connect Slack and email on Foundation, let Ari triage and answer tier-1 questions in the same queue your three support engineers watch, and route anything engineering-shaped into Linear.
Outcome: Tier-1 volume is absorbed by Ari at 100 credits per resolution while your engineers only touch threads that need code context, and reporting history shows what shifted this week.
Use Internal Agent workflow steps to call your own MCP tools, and link GitHub pull requests to threads by pasting the full link into the search bar.
Outcome: Escalations carry the PR, incident and customer context in one thread, so investigations start from evidence rather than a Slack description.
Move to Horizon for Microsoft Teams and Discord channels, per-team business hours, escalation paths and CRM sync, then send a Broadcast from the left sidebar when a release affects every customer.
Outcome: Every customer channel hears the same message with the same login and permissions, and CRM-linked threads show account context without switching tools.
Use Cases
- Run support across Slack, email, chat, Microsoft Teams and in-app forms from one queue with AI triage and routing.
- Let Ari resolve tier-1 questions on first touch, including tickets that arrive as screenshots or log files.
- Test an AI agent safely: draft in the Playground, then run Shadow Mode on live threads before enabling resolution.
- Turn conversations into Linear or Jira issues and PagerDuty incidents without leaving the support thread.
- Send a Broadcast to reach customers on every connected channel at once from the left sidebar.
- Embed a support portal, Help Center and customer cards inside your own SaaS using the GraphQL API.
- Feed real customer questions back into the knowledge base with Knowledge gaps.
- Migrate ticket history from Zendesk, Freshdesk, Intercom, Help Scout, or an in-house system.
Models Under the Hood
as of 2026-10-15
Limitations
- Pricing is credit-based: Foundation is $45/user/month billed annually with 1,000 credits/month and caps member seats at 5; Horizon is $99/user/month billed annually with 2,500 credits/month and 3-10 member seats; Frontier uses custom credits and custom pricing.
- Extra credits are sold in blocks — +1,000 for $10, +2,000 for $20, +5,000 for $50, +10,000 for $100.
- Ari costs 100 credits per resolution, and Microsoft Teams, SLAs, business hours, escalation paths, CRM integrations and reporting themes start only at Horizon, with advanced security, SSO/SCIM and HIPAA reserved for Frontier.
- Machine users replying as a human teammate can blur attribution unless your team agrees ground rules.
as of 2026-10-09
Verification history
We have re-verified Plain 17 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
Showing the 6 most recent of 17 verification passes.
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published Plain tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Foundation
$45/user/month billed annually
Ideal for
Small B2B support teams of up to 5 member seats getting started, with unlimited viewer seats for the rest of the company.
What this tier adds
Starting tier: 1,000 credits/month, Sidekick and Ari, AI workflows, Slack (25 channels), email (2 addresses), in-app forms, live chat, 1 knowledge base, 1 customer inbox, and Linear/Jira integrations.
Horizon
$99/user/month billed annually
Ideal for
Growing teams with more complex workflows that need Microsoft Teams or Discord, SLAs and CRM context across 3-10 member seats.
What this tier adds
Adds Microsoft Teams and Discord channels, SLAs, business hours, escalation paths, CRM integrations, reporting themes, AI suggested responses, unlimited Slack channels and knowledge bases, and full reporting history over Foundation.
Frontier
Custom
Ideal for
Larger organizations that need advanced governance, custom contracting and custom credit volumes.
What this tier adds
Adds custom credits, external AI agents, custom workspaces, custom contracting, SSO and SCIM, custom roles, HIPAA support, white glove onboarding, a dedicated customer success manager, and support and uptime SLAs.
Where the pricing makes sense
The company stage and team size where Plain's pricing actually pencils out — and where peers do it cheaper.
Foundation at $45/user/month billed annually fits small teams up to 5 member seats; Horizon at $99/user/month billed annually fits growing teams needing Teams, Discord, SLAs and CRM sync; Frontier is custom for SSO, SCIM, HIPAA and custom credits. Cheaper than most enterprise help desks at entry, but credit overages and agent usage can push real spend above a flat-rate Zendesk or Intercom seat.
Setup time & first value
How long it actually takes to get something useful out of Plain — broken out by persona, not the marketing-page minute.
Connect Slack or email first and you have threads flowing in under an hour; adding in-app forms and live chat is a same-day task. Sidekick works from a keyboard shortcut with no setup. The API-first path takes longer — teams building a custom channel or portal against the GraphQL API should budget days, not hours, and should read the thread model first.
Switching to or from Plain
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From Zendesk: use the built-in Zendesk importer to move ticket history into Plain threads.
- →From Intercom: use the Intercom importer to bring conversations and customer context across.
- →From Freshdesk: use the Freshdesk importer for ticket history.
- →From Help Scout: use the Help Scout importer to migrate conversations.
- →From an in-house system: push history through the GraphQL API and map your existing objects to threads, tenants and thread fields.
- ↗To Zendesk: export threads and customer records via the GraphQL API, then map them onto Zendesk tickets and users.
- ↗To Intercom: export conversation history through the API and rebuild macros and routing as Intercom workflows.
- ↗To Help Scout: pull threads and knowledge base articles out via the API and reimport them as Help Scout conversations and docs.
- ↗To a self-hosted help desk: use the API and webhooks to mirror threads into your own datastore before cutting channels over.
Integrations
Resources & Guides
Tutorials & Learning
YouTube returned 6 videos for “Plain”, and we withheld 6: 6 could not be judged, because “Plain” is a single word that other videos use for other things. We are showing none, because we could not prove any of them are about Plain.
Official links
Tools that pair well with Plain
Common stack mates teams adopt alongside Plain, with the specific reason each pairing earns its keep.
Pylon AI
Pylon AI is an agentic B2B support platform that turns Slack, Teams, email and phone conversations into directed agent investigations.
Pylon
Agentic B2B support platform where AI agents investigate, resolve, and act on every customer signal.
Ada
Ada builds AI customer service agents that resolve support tickets across chat, email, voice, and social.
Featured Head-to-Head Comparisons
Alternatives to Plain
View all
Frequently Asked Questions
Categories
Best-of guides
Used Plain? Help shape our editorial sentiment research.