kitio.aiPlain vs Cast.app
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Plain starts at $55/mo and Cast.app starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Unified support queue
- GraphQL API
- Slack and Discord channels
- Built-in AI agent
- Bring-your-own agent support
- AI agents for customer accounts
- Personalized account presentations
- Onboarding and adoption flows
- Renewal and expansion prompts
- Data source integrations
| Feature | Plain | Cast.app |
|---|---|---|
| Best for | API-first support platform for B2B SaaS and developer tools | Customer-facing AI agents for onboarding, adoption and renewals |
| Category | Customer support | Customer support |
| Pricing model | Free trial | Paid |
| Starting price | $55/mo | See pricing page |
| Free plan | No, 7-day trial | No |
| Made by | Plain | Cast.app |
| Based in | United Kingdom | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Plain starts at $55/mo and Cast.app starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Foundation
$55/mo
- Per user
- Up to 5 member seats
- 1,000 credits per month
- Slack, email and in-app channels
Horizon
$99/mo
- Per user
- Unlimited seats
- 2,500 credits per month
- Microsoft Teams, SLAs, HIPAA
Frontier
Custom
- Advanced security review
- Support and uptime SLAs
- Dedicated success manager
2 plans
Startup
Contact sales
- Under 25 staff or $5M ARR
- Priced by customer accounts
- Email and AI chat support
Enterprise
Contact sales
- Priced by customer accounts
- Live chat and phone support
- Multi-year volume pricing
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Plain
- Highly programmable
- Good fit for developer products
- Transparent pricing
- Less suited to B2C volume
- Smaller ecosystem
- Needs technical setup to shine
Cast.app
- Priced per account, not per seat
- Works on top of the existing CS stack
- Customer data kept out of training
- Annual contracts only
- No published prices
- Needs good account data to be useful
Which one should you choose?
Choose Plain if you want:
- Highly programmable
- Good fit for developer products
- Transparent pricing
Watch out: less suited to b2c volume.
Choose Cast.app if you want:
- Priced per account, not per seat
- Works on top of the existing CS stack
- Customer data kept out of training
Watch out: annual contracts only.
Plain vs Cast.app FAQ
What is the difference between Plain and Cast.app?
Plain: API-first support platform for B2B SaaS and developer tools. Cast.app: Customer-facing AI agents for onboarding, adoption and renewals. Both are customer support tools.
Is Plain or Cast.app cheaper?
Plain starts at $55/mo and Cast.app starts at See pricing page. Check both pricing pages for current plans.
Do Plain and Cast.app have free plans?
Plain: No, 7-day trial. Cast.app: No.
Who makes Plain?
Plain is made by Plain, based in United Kingdom.
Who makes Cast.app?
Cast.app is made by Cast.app, based in United States.
Which should I choose, Plain or Cast.app?
Choose Plain if you value highly programmable and good fit for developer products. Choose Cast.app if you value priced per account, not per seat and works on top of the existing cs stack.