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Customer Support · head to head

Plain vs Really Simple Systems

Plain logo

Plain

Customer Support

AI support infrastructure built for B2B teams

From
$35/month
Free plan
No
Full reviewWebsite
R

Really Simple Systems

CRM

Easy CRM for small businesses

From
$15/month
Free plan
No
Full reviewWebsite

The short version

  • Each has a real cost: Plain foundation plan limited to 2,000 credits per month may be restrictive for high-volume teams; Really Simple Systems the vendor's own pricing page as captured by the Internet Archive on 22 October 2019 listed four CRM tiers billed annually: Free at $0 for up to 2 users, Starter at $14 per user per month, Professional at $30 per user per month, and Enterprise at $46 per user per month (each roughly 7 to 10 percent higher if billed monthly); the Marketing add-on was $22 per month for up to 5,000 emails and Advanced Marketing scaled to 50,000 emails per month, though this capture is over five years old
  • They diverge on capability: Plain covers Multi-channel consolidation, Really Simple Systems covers Contact management.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Plain and Really Simple Systems actually diverge.

Attributes where Plain and Really Simple Systems differ
AttributePlainReally Simple Systems
Starting price$35/month$15/month
Pricing modelTiered pricing per seat with credit systemsubscription
PlatformsWeb, APIWeb
CategoryCustomer SupportCRM
FoundedUnknown2009

Identical on both: free tier (No), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Plain

  • Multi-channel consolidation
  • AI agents
  • Workflow automation
  • Sidekick assistant
  • Insights engine
  • Linear and Jira integration
  • Help Center and Knowledge Base
  • API-first extensibility

Only in Really Simple Systems

  • Contact management
  • Sales pipeline
  • Task management
  • Email integration
  • Reporting
  • Zapier
  • Google Workspace
  • GDPR

What people use each for

The jobs each tool is most often brought in to do.

Plain

  • Consolidating support from multiple channels into one inboxnot Really Simple Systems
  • Automating support workflows with AI agentsnot Really Simple Systems
  • Extracting insights and trends from customer conversationsnot Really Simple Systems
  • Building custom support solutions with API accessnot Really Simple Systems
  • Implementing AI-assisted customer support at scalenot Really Simple Systems

Really Simple Systems

  • Sales managementnot Plain
  • Contact trackingnot Plain

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Plain

  • Foundation plan limited to 2,000 credits per month may be restrictive for high-volume teams
  • Pricing increases significantly from Foundation to Horizon ($35 to $299 per month)
  • No published pricing for Frontier (custom) plan
  • Additional seat costs ($99 per seat) add up for larger teams
  • Credit-based system requires monitoring usage to avoid overages

Really Simple Systems

  • The vendor's own pricing page as captured by the Internet Archive on 22 October 2019 listed four CRM tiers billed annually: Free at $0 for up to 2 users, Starter at $14 per user per month, Professional at $30 per user per month, and Enterprise at $46 per user per month (each roughly 7 to 10 percent higher if billed monthly); the Marketing add-on was $22 per month for up to 5,000 emails and Advanced Marketing scaled to 50,000 emails per month, though this capture is over five years old

Pricing, plan by plan

Plain

$35/month
  • Foundation$35/month
    • 2,000 credits per month
    • Slack and email channels
    • Ari AI agent
  • Horizon$299/month
    • 15,000 credits per month
    • All Foundation features
    • Microsoft Teams integration
  • Frontier$null/custom
    • Custom credit allowance
    • All Horizon features
    • Discord channels

Really Simple Systems

$15/month
  • Essential$15/month
    • Contact management
    • Task tracking
  • Professional$25/month
    • Everything in Essential
    • Sales pipeline
    • Reporting
  • Professional Plus$35/month
    • Everything in Professional
    • Advanced customization

Which should you pick?

Choose Plain if

  • You need multi-channel consolidation.
  • You work on Web, API.
  • You also want ai agents.
Plain review

Choose Really Simple Systems if

  • You need contact management.
  • You also want sales pipeline.
Really Simple Systems review

Questions people ask

Is Plain or Really Simple Systems better?
Neither clearly leads. Plain starts at $35/month and Really Simple Systems at $15/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Plain or Really Simple Systems?
Plain starts at $35/month and Really Simple Systems at $15/month.
Does Plain or Really Simple Systems run on more platforms?
Plain runs on Web, API. Really Simple Systems runs on Web.
What is Plain best used for?
Plain is most often used for consolidating support from multiple channels into one inbox, automating support workflows with ai agents, extracting insights and trends from customer conversations, building custom support solutions with api access. Of those, consolidating support from multiple channels into one inbox and automating support workflows with ai agents are not what Really Simple Systems is typically brought in for.
What can Plain do that Really Simple Systems cannot?
Plain covers Multi-channel consolidation, AI agents, Workflow automation, Sidekick assistant. Really Simple Systems covers Contact management, Sales pipeline, Task management, Email integration.

Answered from the vendors’ own pages

Plain: What is included in the Foundation plan?

The Foundation plan ($35/month per seat) includes 2,000 credits per month, support for Slack and email, Ari AI agent, Linear and Jira integrations, and Help Center access. Up to 5 seats are included.

Source
Plain: Can I use Plain with Microsoft Teams?

Yes, Microsoft Teams integration is available on the Horizon plan ($299/month) and higher.

Source
Plain: Is there a free trial for Plain?

Yes, Plain offers a 7-day free trial with no credit card required. You can also get 50% discount through their startup program.

Source
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