Customer.io vs Postscript
Side-by-side plans, pricing, and feature gates for Customer.io and Postscript, verified . Customer.io is primarily marketing automation; Postscript is primarily sms marketing.
Plans side by side
Every published plan from each vendor, with the headline monthly anchor price. Some prices scale with subscriber count or seats; full detail lives on each tool's page.
Customer.io
- Essentials
Entry tier with the visual workflow builder
$100/mo - Premium
Custom volume, HIPAA available, daily routines
$1,000/mo - Enterprise
Best volume pricing with dedicated infrastructure
Custom
Postscript
- Starter$0/mo
- Growth$100/mo
- Professional
Most popular
$500/mo - EnterpriseCustom
Limits at the entry paid tier
Compares Essentials (Customer.io) against Growth (Postscript). Both are the lowest-priced non-free, non-custom plan on each side.
| Limit | Customer.io | Postscript |
|---|---|---|
| Contacts | 5,000 profiles (people plus objects) | · |
| Emails / month | 1,000,000 | · |
| Team seats | 1 | · |
When Customer.io wins
- B2C and B2B teams with custom objects in their data model (accounts, subscriptions, devices) who need messaging tied to those entities
- Product-led businesses sending behavior-triggered lifecycle messaging across email, SMS, and push
- Teams needing HIPAA compliance for healthcare or digital-health workflows
Where Customer.io is the wrong fit
- Solo creators and newsletter operators (Kit or beehiiv are the right shape)
- Small businesses that need a $0/month or $20/month entry point (MailerLite or Mailchimp Free fit better)
- Teams that want a one-click WYSIWYG email tool with no data modeling required
When Postscript wins
- Shopify e-commerce stores doing $1M+ GMV with active SMS list growth
- Brands graduating from Klaviyo SMS or Attentive on cost
- Teams wanting a Shopify-native SMS experience separate from email
Where Postscript is the wrong fit
- B2B companies, where SMS is not a standard channel
- Creators or info-product sellers whose per-message economics do not match
- Brands without an SMS-friendly Shopify segment to drive ROI
Common questions
- Is Customer.io cheaper than Postscript?
- At the entry tier, Postscript starts at Free versus Customer.io at $100/mo. Postscript is cheaper at the entry. Pricing scales differently above that, so check the full plan grid.
- Does Customer.io or Postscript have a free plan?
- Neither has a permanent free plan. Both offer free trials.
- Are Customer.io and Postscript in the same category?
- No. Customer.io is primarily a marketing automation tool; Postscript is primarily a sms marketing tool. They overlap on use case but sit in different primary categories, so the comparison is between adjacent tools rather than direct competitors.
- Which has more plans, Customer.io or Postscript?
- Postscript ships 4 plans; Customer.io ships 3. Postscript's longer ladder gives more granular upgrade steps, which can mean smoother price escalation as your team scales.
- Where can I see alternatives to Customer.io or Postscript?
- Each tool has a dedicated alternatives page on TierGauge with ranked options and verified pricing: /alternatives/customer-io for Customer.io and /alternatives/postscript for Postscript. Alternatives are derived from each tool's editor-flagged competitors plus same-category tools we track.
Customer.io: https://customer.io/pricing/ · Postscript: https://postscript.io/pricing
Last verified . Pricing changes between refreshes; confirm at the vendor before purchasing.