Plain Pricing 2026: Is It Worth It?

✨ Psst... Looking for a modern but affordable alternative to Plain? Check out Featurebase →

Thinking about using Plain to handle your customer support, but not sure what it'll actually cost? You're not the only one.

Plain recently renamed its plans and added an AI credit model on top of seat pricing, so the total can be harder to pin down than the headline numbers suggest.

In this guide, I'll break down Plain's 2026 pricing plan by plan, explain how the new Sidekick credits work, and show what you're really paying for (and where the limits kick in). 👇

Key takeaways

• Three core plans: Foundation ($35/mo), Horizon ($299/mo), and Frontier (custom), all billed per seat with a 7-day free trial.
• Seats are bundled, then metered: Foundation includes 1 seat (+$35 each, up to 5), Horizon includes 3 seats (+$99 each, up to 10), and Frontier is custom.
• New Sidekick AI credits: every plan now includes a monthly credit allowance (2,000 on Foundation, 15,000 on Horizon, custom on Frontier) for Plain's internal AI assistant.
• Credits are metered by effort, not volume, so the same allowance can cover very different amounts of work, which makes monthly cost harder to forecast.
• Ari, the customer-facing AI agent, is included on every plan and does not use credits.
• Annual billing saves about 10% versus paying monthly, and viewer seats are free and unlimited on all plans.
• Help Center, workflows, SLAs, and Microsoft Teams only unlock on Horizon and above.
• There are more predictable alternatives, including Featurebase, which prices its AI per resolution and includes agent-assist AI at a fixed seat price.

What is Plain?

Plain is a modern customer support platform built for engineering-heavy, B2B teams that prefer working from tools like Slack, Linear, or Jira instead of traditional help desks.

It connects all your channels - Slack, email, chat, and more - into one shared inbox with deep automation and workflow control. The result is a fast, API-first support tool that fits technical teams perfectly, but might feel rigid or pricey for smaller or non-technical teams.

Plain pricing 2025

Plain's pricing is split into three plans (Foundation, Horizon, and Frontier), each billed per seat, either monthly or annually (with around a 10% discount for annual billing). Prices below are the annual rates, accurate as of July 2026.

All plans include free viewer seats (read-only access), a 7-day free trial, Plain's customer-facing Ari AI agent, and a monthly allowance of Sidekick AI credits (more on those below). Let's break them down. 👇

Foundation ($35/mo)

Plain's entry-level plan is designed for early-stage startups or small teams that want to bring some structure to their customer support without heavy configuration. The base price includes 1 support seat, with each additional seat costing $35/mo up to a cap of 5 seats. Viewer seats stay free.

What's included:

• Slack integration (up to 25 channels)
• 2 shared email addresses
• Live chat and in-app form
• Linear and Jira integrations
• Customer cards with real-time context
• Ari AI agent and up to 5 workflows
• 2,000 Sidekick credits per month

Important to note:

• Limited to a single Knowledge Base and Ask AI surface, with no Microsoft Teams or Discord
• No SLAs, business hours, or advanced reporting (only 7 days of history)
• Limited scalability due to the 5-seat cap

Real-world cost example: A team of 5 seats pays about $175/month (1 seat at $35 plus 4 at $35), or roughly $2,100/year billed annually.

Horizon ($299/mo)

The Horizon plan is built for teams that have a dedicated support or success function and need more control, automation, and structured workflows.

The base price includes 3 support seats, with each additional seat costing $99/mo up to a cap of 10 seats, plus unlimited free viewer seats. It also unlocks the Help Center, Microsoft Teams, and workflow automations like SLAs and business hours.

What's included:

• Everything in Foundation
• Unlimited Slack channels and up to 10 shared email addresses
• Microsoft Teams and headless support portal
• Workflow rules, SLAs, business hours, and escalation paths
• AI-suggested responses and reporting themes
• Team-level and all-time reporting
• Plain's AI-powered Help Center and Knowledge Base (unlimited)
• 15,000 Sidekick credits per month

Important to note:

• Seat cap at 10 users, so you'll need Frontier if you grow further
• No Discord, custom channels, or product insights (Frontier-only)
• The per-seat jump from Foundation is steep once you pass the included 3 seats

Real-world cost example: A team of 10 seats pays about $992/month (3 seats at $299 plus 7 at $99), or roughly $11,904/year billed annually. Eligible startups can apply for up to 50% off through Plain's Startup Program.

Frontier (Custom)

The Frontier plan is Plain's top tier, meant for larger support organizations or fast-growing B2B teams that need extensibility, data visibility, and security compliance. It removes the seat cap and offers volume-based or org-wide pricing depending on your company size.

What's included:

• Everything in Horizon
• 25+ shared email addresses
• Discord and custom channels
• Custom workspaces and custom contracting
• Advanced security, SSO, and SCIM
• Custom AI and bring-your-own-agent support
• Product insights and advanced analytics
• Dedicated CSM and white-glove onboarding
• Custom Sidekick credit allowance

Important to note:

• No public pricing, so you'll need to contact sales for a quote
• Some enterprise features (like BI integrations and custom data exports) require extra setup time
• Onboarding is handled directly with Plain's team

✨ Switch from Plain to save +$1k/mo and get the fastest AI-powered support platform →

How Plain's Sidekick AI credits work

The biggest change to Plain's pricing in 2026 is credits. As of 13 July 2026, Plain's internal AI assistant, Sidekick, is metered through a monthly credit allowance that comes with your plan. Before that date it was free for everyone during a launch window, so if you last looked at Plain earlier in the year, this is new.

It helps to keep Plain's two AI features straight, because only one of them costs credits:

• Ari is the customer-facing AI agent that resolves conversations on the front line. It's included on every plan and does not use credits.
• Sidekick is the internal assistant your team uses inside a thread. It pulls context from across your connected tools (Linear, GitHub, HubSpot, Sentry, and others) to answer messier questions. Sidekick is the only feature in Plain that draws down credits.

How many credits you get

Each plan comes with a monthly allowance that resets at the start of every billing cycle. Unused plan credits do not roll over.

If you run out mid-cycle, Sidekick pauses until your credits reset or you buy an add-on pack (purchased credits do roll over). The rest of Plain keeps working normally, only Sidekick is affected.

Why the cost is hard to predict

Here's the catch: credits are metered by effort, not volume. In Plain's own words, the credits a Sidekick conversation consumes vary based on the complexity of the work. A quick thread summary costs very little, while a deep, multi-source investigation across several tools costs far more, and Plain doesn't publish a fixed per-question rate.

That makes the allowance genuinely hard to translate into a number of tasks up front:

• Light use: a small team mostly asking for quick summaries and simple lookups can stretch 2,000 credits across a month without much thought.
• Heavy use: a team that leans on Sidekick to trace bugs across Linear, GitHub, and Sentry, or to pull a full account history before every call, can draw down the same allowance far faster, and there's no published rate to forecast against.
• Scaling up: Horizon's 15,000 credits is about 7.5x Foundation's allowance, which buys headroom for daily use, but it's still a cap you can hit in a busy month.

The practical takeaway is that Plain now has two cost dials instead of one: seats and AI effort. The seat cost is fixed and easy to model, but the credit cost depends on how your team actually works, so it's worth watching usage in your first few billing cycles before you settle on a plan.

Hidden costs & limitations

Plain's headline pricing is straightforward, but a few things can quietly affect your total cost, especially as your team scales or leans on AI. Here's what to watch out for:

1. Seat caps and per-seat overage

Foundation and Horizon both come with hard seat caps (5 and 10 respectively), and only the first 1 and 3 seats are bundled into the base price. Every seat beyond that adds $35/mo on Foundation or $99/mo on Horizon, so a 10-person team on Horizon lands close to $992/month rather than the $299 headline. Grow past 10 and you're pushed to the custom-priced Frontier plan.

2. Unpredictable AI credits

Because Sidekick is metered by effort rather than a flat per-resolution or per-question rate, your AI cost can swing month to month based on how heavily your team investigates. Teams that adopt Sidekick enthusiastically may burn through the included allowance and need to buy add-on credits, which is a line item that simply didn't exist earlier in 2026.

3. Feature gating

Some of Plain's most valuable tools are locked behind higher plans:

• Foundation leaves out SLAs, business hours, Microsoft Teams, and the full Help Center
• Horizon adds workflows and the Help Center but still lacks Discord, custom channels, and product insights
• Frontier is the only plan with custom channels, advanced security, and bring-your-own-agent support

If your team relies heavily on automation or needs a full omnichannel setup, you'll likely need Horizon or Frontier.

4. Reporting limitations

Reporting depth scales with your plan:

• Foundation only shows 7 days of data
• Horizon adds team-level and all-time reporting
• Frontier unlocks product insights and advanced analytics

If visibility into performance or trends matters to you, Foundation will feel restrictive quickly.

What if Plain is too expensive for me?

If you like Plain's modern, integration-heavy approach but find the pricing, seat caps, or new credit model too restrictive, you've got plenty of alternatives that offer similar features, often with more flexibility and more predictable costs.

Here are some of the best ones to consider: 👇

1. ✨ Featurebase - Best all-in-one AI-powered support platform for modern startups
2. Intercom - Best for conversational and proactive customer engagement
3. Zendesk - Best enterprise helpdesk with advanced automation and reporting
4. Pylon - Best Slack- and Teams-based support for internal collaboration
5. Crisp - Best affordable live chat and shared inbox for SMBs
6. Front - Best collaborative inbox for email, chat, and workflow automation
7. Help Scout - Best for small teams that want simple, personal customer support

You can dive deeper into all of the best Plain alternatives from our blog.

So, is Plain worth it?

Plain is a powerful support platform that fits technical and B2B teams running customer operations through Slack, Linear, or Jira. But its 2026 pricing can climb quickly, the most useful features sit on the higher tiers, and the new effort-based Sidekick credits make your monthly AI cost harder to predict than a simple per-seat number.

Featurebase is a modern and affordable Plain alternative that combines an AI-powered support inbox, a help center, and Slack integration in one platform. Its pricing units are easy to model: the Fibi AI Agent resolves customer tickets at a flat $0.49 per resolution, and AI Copilot helps your teammates answer faster at a fixed seat price rather than a metered credit balance. You also get feedback management, product updates, and a mobile app, and it's loved by thousands of companies like Lovable, Polymarket, and Raycast.

Best of all, Featurebase comes with a free plan and paid plans starting at $29/seat/month, so there's no downside to trying it out. 👇

✨ Automate your support with the fastest AI-enhanced Inbox today →

FAQs

Does Plain have a free plan or trial?

Every plan includes a 7-day free trial with no credit card required. Plain does not offer a free plan, so once the trial ends you'll need to move to a paid plan to keep using it.

How much does Plain cost per month?

Plain has three plans billed per seat: Foundation at $35/mo (1 seat included, +$35 per extra seat up to 5), Horizon at $299/mo (3 seats included, +$99 per extra seat up to 10), and Frontier at a custom price. Annual billing saves about 10%, and every plan also includes a monthly Sidekick AI credit allowance.

What are Plain's Sidekick credits and how do they work?

Credits are the unit Plain uses to meter Sidekick, its internal AI assistant, with 2,000 credits on Foundation, 15,000 on Horizon, and a custom amount on Frontier each month. Credits are consumed by effort, so a quick summary costs little while a deep multi-tool investigation costs far more, and the allowance resets monthly without rolling over. Plain's customer-facing Ari AI agent is separate and does not use credits.

What happens if you run out of Plain credits?

If you use up your monthly credit allowance, Sidekick is paused until your credits reset at the start of the next billing cycle, or until you purchase an add-on credit pack. The rest of Plain continues to work normally, so only Sidekick features are affected.

Does Plain offer a startup discount?

Yes. Plain runs a Startup Program that offers eligible early-stage startups up to 50% off. You'll need to reach out to Plain's sales team to check whether you qualify and get the exact discount.

Is Plain suitable for non-technical teams?

Not really. Plain is designed for technical, product-led companies that prefer API-based workflows over traditional ticketing. If your team wants something simpler to set up, Plain's configuration and integrations may feel like overkill, and a tool like Featurebase or Help Scout will be easier to adopt.