Postscript ships SMS for Shopify. OCCS ships SMS for Shopify plus the email, the booking page, and the personalized video that closes the loop.
Postscript is a sharp specialist — they own deep Shopify SMS integrations + carrier-side compliance tooling. OCCS is the bundle: same Shopify cart-abandonment auto-trigger, but it fires email + SMS + personalized video in one sequence, not just text.
OCCS
10DLC-registered SMS at carrier cost-plus + bundled with email broadcasts, booking pages, sequences, and personalized video — all under one bill, all in one workspace.
Postscript
Starter $0/mo + $0.015/SMS → Growth $100/mo + $0.012/SMS → Professional custom. SMS-only.
Source: postscript.io/pricing (checked 2026-05-07; per-message pricing model)
Monthly cost — 5K SMS sends + 1K abandoned-cart recovery emails
Casual (5K/mo)
Active (15K/mo)
Heavy (50K/mo)
Numbers assume Postscript Growth ($100 base + $0.012/SMS) + Klaviyo SMB ($45-150/mo for the email half). OCCS Starter ($49) + send volume ($0.025/SMS + $0.005/email). At low-to-mid volume OCCS undercuts by bundling. At very high volume Postscript's per-message rate edges ahead, but you give up the email + booking + video integration.
Feature-by-feature
Honest comparison. Where Postscript ships the same capability we say so — the moat is in the rows where they don't.
| Feature | OCCS | Postscript |
|---|---|---|
| Shopify cart-abandonment auto-trigger | ||
| TCPA quiet-hours enforcement (8am-9pm local) | ||
| STOP / HELP keyword auto-handling | ||
| MMS support | ||
| 10DLC registration wizard | ||
| Two-way SMS conversations + inbox | ||
| Deep Shopify product-catalog merge (SKU dropdown into SMS body) | — | |
| Carrier-relationship tier (high-throughput dedicated short codes) | — | |
| Same auto-trigger fires SMS + email + personalized video in one sequence | — | |
| Per-recipient AI talking-head video at broadcast time | — | |
| Email broadcasts + sequences in same workspace | — | |
| Booking pages with reminder ladders + .ics + sequences | — | |
| Multi-channel publishing (Meta / Google / TikTok / X / LinkedIn / YouTube) | — | |
| AI brand-voice grounding from website crawl | — |
Bottom line
Postscript is the right answer if your team is SMS-specialist and your volume is high enough that the carrier-relationship tier matters. For everyone else — Shopify stores running cart-recovery, post-purchase, and win-back across SMS + email + video — OCCS does the same job for less and skips the Klaviyo + Calendly + Sendspark bolt-ons.
Common questions
Does OCCS hit Postscript's deliverability rates?
Can I migrate my Postscript subscriber list?
What about Postscript-specific Shopify discount-code generation?
Ready to switch?
Free tier, no card required. Run OCCS in parallel with Postscript for 14 days — keep what works.