How much does Plain cost?

Plain is a paid product. The listed starting price is $35/seat/mo.

What does Plain integrate with?

Plain integrates with Slack, Microsoft Teams, Discord, Linear, Jira, PagerDuty, GitHub, incident.io, Shortcut, and Rootly.

What compliance standards does Plain meet?

Based on the vendor's own security and trust pages, Plain claims SOC 2 compliance.

Which support channels does Plain cover?

Plain handles customer conversations over chat and email.

Can I buy Plain without talking to sales?

Yes. You can sign up and start on your own. Minimum commitment: Billed annually.

What are the best Plain alternatives?

Popular alternatives include DevRev, Helpin, and Pylon.

Plain

B2B & Technical Support Help Desk & Ticketing

API-first support platform for technical B2B teams, with AI that understands your product.

Best for

B2B and developer-facing companies whose customers ask technical questions in shared Slack channels, Discord and email, and want an API-first help desk with an AI agent included at no per-resolution charge, from a published $35 per seat with a 7-day trial and SOC 2 coverage.

Look elsewhere if

You run consumer support at volume, need voice, or need hosting outside the UK: Plain's verified channels are chat and email and its residency is AWS London. AI usage is metered through monthly credits.

Pricing: Paid from $35/seat/mo
Founded: 2020
Free trial: 7-day free trial
How you buy: Self-serve signup
Minimum commitment: Billed annually
Company: Independent, venture-backed latest: Series A, $15M (February 2025)
Channels: Chat, Email
Data residency: UK (AWS London)
Compliance: SOC 2
Integrations: Slack Microsoft Teams Discord Linear Jira PagerDuty GitHub incident.io Shortcut Rootly

Plain is the support platform that talks to engineers without condescension. Founded in London around 2020 by Simon Rohrbach, previously Deliveroo's design director, and Matt Vagni, it is API-first, fast, and deliberately lean, built for B2B and developer-facing companies whose customers file sharp technical questions in shared Slack channels, Discord servers, and email. Its customer list is a tour of modern developer tooling: Vercel, Cursor, Raycast, Sanity, Laravel, n8n, and Stytch, and Sanity reported a 120 percent jump in team satisfaction after switching from Zendesk.

All those channels flow into one timeline per customer, with SLAs, escalation paths, and the workflow niceties of a grown-up help desk. The AI comes as a named pair: Ari, a customer-facing agent that answers technical questions from your docs and past threads, and Sidekick, an internal assistant that helps agents draft, label, and triage. A pointed commercial choice: every plan includes Ari with no per-resolution charges, a deliberate contrast to the outcome-billing trend, though AI usage is metered through monthly credits.

Plain raised a $15 million Series A led by Battery Ventures in early 2025, about $21 million in total, and publishes its pricing: Foundation at $35 per seat per month, Horizon at $299 a month for growing teams, and a custom Frontier tier, with a 50 percent startup discount.

Choose Plain if you are an engineering-led B2B company that finds the incumbents heavy and the e-commerce tools irrelevant. It is the tasteful, technical option, and the flat AI pricing makes costs predictable in a category where the meter usually runs by the ticket.

Key features

Ari customer-facing AI agent
Sidekick internal AI assistant
Slack, Teams, and Discord channels
SLAs and escalation paths
API-first customization

What the AI can do

Hands off to a human with the conversation context when it cannot resolve an issue.

Published customer results

Outcomes named customers have reported, as published by the vendor or the customer.

n8n: Handles 60% of tickets automatically Source
Sourcegraph: Cut first response time by 67% Source
Tinybird: Cut Enterprise first response time from 1 hour to 12 minutes Source

Visit Plain →

See the best Plain alternatives →

What does Plain cost? →

Frequently asked questions

Who is Plain best for?: B2B and developer-facing companies whose customers ask technical questions in shared Slack channels, Discord and email, and want an API-first help desk with an AI agent included at no per-resolution charge, from a published $35 per seat with a 7-day trial and SOC 2 coverage. Look elsewhere if you run consumer support at volume, need voice, or need hosting outside the UK: Plain's verified channels are chat and email and its residency is AWS London. AI usage is metered through monthly credits.
How much does Plain cost?: Plain is a paid product. The listed starting price is $35/seat/mo. Compare pricing across all listed tools →
What does Plain integrate with?: Plain integrates with Slack, Microsoft Teams, Discord, Linear, Jira, PagerDuty, GitHub, incident.io, Shortcut, and Rootly.
What compliance standards does Plain meet?: Based on the vendor's own security and trust pages, Plain claims SOC 2 compliance. See how that compares across vendors →
Which support channels does Plain cover?: Plain handles customer conversations over chat and email.
Does Plain have a free trial?: Yes: 7-day free trial.
Can I buy Plain without talking to sales?: Yes. You can sign up and start on your own. Minimum commitment: Billed annually.
When was Plain founded?: Plain was founded in 2020.
What are the best Plain alternatives?: Popular alternatives include DevRev, Helpin, and Pylon. See all Plain alternatives →

Sources for the facts on this page

Pricing page: plain.com 1 seat + $35/additional seats checked September 2026
Human handoff: plain.com When Ari can't help, it escalates with full context of customer history, thread summary, and what it already tried. checked September 2026
Free trial: plain.com 7 day free trial checked September 2026
How you buy: plain.com 7 day free trial checked September 2026
Company: plain.com We've raised a $15M Series A led by Battery Ventures, with continued participation from our previous backers Index Ventures and Connect Ventures. checked September 2026
Latest funding: plain.com We've raised a $15M Series A led by Battery Ventures, with continued participation from our previous backers Index Ventures and Connect Ventures. checked September 2026
Latest funding: plain.com raised a $15M Series A led by Battery Ventures checked October 2026
Compliance: plain.com Security is top of mind for Plain and we’ve made it official with our new SOC 2 Type II attestation, obtained after a rigorous audit to affirm the effectiveness of our security processes and controls. checked September 2026
Minimum commitment: plain.com Billed annually checked October 2026

Updated October 2026

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Plain vs Unthread

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