Plain Foundation costs $45 per paid member per month with annual billing or $55 with monthly billing, and permits up to five members. Horizon costs $99 annually or $139 monthly and supports three to ten members. Every plan includes unlimited free viewers. The number of teammates who reply to customers determines the seat bill. These USD rates come from Plain’s current plan documentation , researched October 18, 2026.
Five and six paid users
Scenario Annual billing, monthly equivalent Monthly billing Five Foundation members $225; $2,700/year $275/month Six Horizon members $594; $7,128/year $834/month Three Foundation members plus three viewers $135; $1,620/year $165/month Three Horizon members plus three viewers $297; $3,564/year $417/month
Six paid members cannot stay on Foundation. That makes the change from five to six materially larger than another $45 seat. A six-person company can still use Foundation if at most five need paid member access and its feature limits fit. Horizon has a three-member minimum even if only one or two people need the upgraded capabilities.
What engineer viewers can do
Viewer seats let engineers read threads and customer context without replying to customers. Owners, Admins and Support users use paid members. The reviewed seat documentation does not explicitly grant viewers permission to write internal notes, so do not cost an active investigation workflow as read-only access without checking that permission. Viewer Sidekick sessions also consume workspace credits.
Budget the required tier and usage
Foundation includes two email addresses and one Help Center. Horizon adds ten email addresses, unlimited Help Centers, advanced workflow rules and SLAs. A three-member team needing SLA targets therefore belongs in the $297 annual-billing example, even though it fits Foundation’s member ceiling.
Foundation includes 1,000 and Horizon 2,500 credits per workspace each month. Ari outcomes consume 100 credits , while Sidekick and selected AI workflow actions also use the allowance. Top-ups start at $10 for 1,000 credits; included credits expire monthly. The table covers seats before extra usage and applicable taxes. Continue with the Plain review and B2B SaaS support comparison .
25–99 per month MRPeasy — $49 per user per month — MRPeasy Starter starts at $49 per user per month. The vendor lists Professional at $69, Enterprise at $99 and Unlimited at $149 per user per.Re:amaze — $26.10 per team member per month — Four Re:amaze Basic users cost $116 monthly with unlimited human conversations. Add AI resolution overages separately for a normal and triple-volume month.100 or more per month ClearFeed — $24 per agent per month — ClearFeed: documented pricing and customer support buying decisions.Crisp — $45 per workspace per month — Compare Crisp’s monthly workspace prices, included agents, AI credits and the cost for a five-agent team.Deskpro — $39 per agent per month — Compare Deskpro Cloud seat minimums, branded help center limits and the five-agent cost case, with separately quoted Private deployment.Drag — $12 per user per month — Drag: documented pricing and customer support buying decisions.eDesk — $39 per agent per month — eDesk: documented pricing and customer support buying decisions.Fluent Support — $90 per year — Compare Fluent Support’s annual site licenses, email piping allowances and a five-agent cost example.Freshdesk — $19 per agent per month — Freshdesk Growth starts at $19 per agent/month annually. See Pro and Enterprise seat costs, Omni differences and Freddy AI charges.Front — $25 per seat per month — Front Starter is $25 per seat monthly annually. See five-seat costs, the Professional upgrade and separate Copilot and Autopilot charges.Gmelius — $25 per user per month — Gmelius: documented pricing and customer support buying decisions.Gorgias — $10 per month — Gorgias Helpdesk starts at $10 monthly for 50 tickets and three seats. Model a five-agent team by workload, overages and separate AI interactions.Help Scout — $25 per user per month — Help Scout starts at $25 per user monthly on annual billing. Compare a five-agent team, routing tiers, SLA limits and AI Answers costs.HelpSpot — $899 per year for 3 agents — HelpSpot starts at $899 per year for three agents. Compare the five-agent annual tier, included features and the same price across hosting options.Hiver — $25 per user per month — Hiver lists a Free plan at $0; paid plans start at $25 per user per month with annual billing. Compare five-user Growth, Pro and Elite totals, SLA warnings and seat increments.HubSpot Service Hub — $7 per seat per month — Hub-based USD Service Hub costs and worked examples, with the separate EMEA flexible pricing schedule explained.Intercom — $29 per seat per month — Current Intercom plan rates, five-agent seat calculations, and the separate Fin and Copilot meters.Katana — $299/month for Core — Katana’s current page lists a Free plan and a Core plan starting at $299 per month, with additional pricing driven by sales orders, locations.Keeping — $14 per user per month — Keeping: documented pricing and customer support buying decisions.LiveAgent — $15 per agent per month — LiveAgent: documented pricing and customer support buying decisions.Missive — $14 per user per month — Missive starts at $14 per user monthly annually. Five Productive users cost $120 monthly equivalent for rules, tasks and email escalation.OpenMES — €500 net per installation per month (or €5 — OpenMES Enterprise costs €500 net monthly or €5,000 net annually for one installation. The annual option is €1,000 below twelve monthly.qcadoo MES — PLN 145 per license per month — The official Polish pricing table lists BASIC at PLN 145 per license per month with annual prepayment and a five-license minimum, or PLN 165.respond.io — $79 per month — respond.io: documented pricing and customer support buying decisions.Richpanel — $99 per seat per month — Model four Richpanel seats and triple-volume AI consumption using annual versus monthly commitments, token credits and the mandatory AI minimum.Salesforce Agentforce Service — $25 per user per month — Salesforce Agentforce Service: documented pricing and customer support buying decisions.Sepasoft MES — $9 — Sepasoft publishes perpetual site-license module prices rather than a single MES subscription. Examples on the opened page include SPC at.Suptask — $15 per agent per month — Compare Suptask annual and monthly agent prices, plan limits, integration billing and a five-agent cost example.TeamSupport — $45 per month — TeamSupport: documented pricing and customer support buying decisions.Trengo — €299 per month — Compare Trengo Boost and Pro prices, included users and conversations, add-on rates, and the cost for a five-agent team.Tulip — $100 per interface per month — Essentials is $100 per interface per month and Professional is $250 per interface per month, billed annually, with a 10-interface minimum for.Zammad — €7 per agent per month — Compare Zammad hosted agent rates, plan limits, AI call charges and annual self-hosted support packages.Zendesk — $19 per agent per month — Zendesk starts at $19 per agent/month on annual billing. Compare five-agent Support and Suite costs, Copilot and automated resolution charges.Zoho Desk — $7 per user per month — Zoho Desk Express starts at $7 per user/month annually. See a five-user calculation, upgrade triggers and separate AI cost models.Quote-only or no published price Document360 Pricing 2026: Plans and 5-Agent Cost — Document360 publishes tailored pricing. Specify editors, reviewers, reader allowances, languages, mixed access, SSO and helpdesk handoff before comparing cost.Helpjuice Pricing 2026: Plans, Free Trial and 5-Agent Cost — Helpjuice: documented pricing and customer support buying decisions.Opcenter Execution Pricing 2026: Plans, Licensing and Free Trial — Public prices and named subscription plans are not shown on the opened Siemens product page. Siemens directs buyers to contact its team for.Plex MES Pricing 2026: Plans, Licensing — Plex publishes an annual subscription fee but no price; pricing depends on selected plants, modules and deployment requirements.Pylon Pricing 2026: Plans, Free Trial and 5-Agent Cost — Published Pylon seat amounts, qualified five and six-seat calculations, account timeline add-on, and the contract terms still requiring a quote.ServiceNow Customer Service Management Pricing 2026: Plans — Compare the CSM Advanced and Prime packages, the published custom-quote model and the five-agent buying case.Wati Pricing 2026: Plans, Free Trial and 5-Agent Cost — Compare Wati Growth, Pro and Business seat allowances, usage limits, message charges and the five-agent cost calculation.Plans and prices Prices as of October 2026 Plan Price Billing Limits Included Foundation $45 USD per user per month Billed annually Maximum 5 1,000 credits / month; Slack, email, in-app channels; Linear, Jira integrations Horizon $99 USD per user per month Billed annually Minimum 3; Maximum 10 2,500 credits / month; Microsoft Teams; SLAs and Business hours Frontier Not published — Minimum 10 Custom credits; Multiple workspaces; Custom contracting
Sources: Plain Pricing — Plans from $45/user/month | 7-Day Free Trial
Cost for 5 agents Plan Per month Per year Note Foundation (Billed annually) $225 USD $2,700 USD — Horizon (Billed annually) $495 USD $5,940 USD —
Pricing questions How much does Plain cost? Plain starts at $45 per user per month, Foundation, billed annually.
Is there a free trial for Plain? Plain offers a 7-day free trial.
What is the cheapest listed Plain plan? Foundation starts at USD 45 per user per month, billed annually.
How much does Plain cost for 5 agents? Foundation totals USD 225 per month equivalent and USD 2,700 per year.
What does Plain's Foundation plan include? Foundation includes 1,000 credits / month, Slack, email, in-app channels, Linear, Jira integrations.
