What's the actual onboarding timeline for Postscript on a Shopify Plus store, from install to first live campaign?

How long does Postscript take from install to first live campaign on Shopify Plus?

Postscript takes about 2 to 3 weeks from install to first live campaign on a Shopify Plus store in Deploi's planning, because three approval queues run on someone else's clock. The Postscript and Attentive decision comes first; this table times each step after install:

These are Postscript's published durations, not a Deploi commitment. A denied verification adds up to 5 business days after you resubmit (Postscript Help Center, October 2026). So plan the date backwards from verification, the way a Klaviyo migration is paced by sender warming.

Which Postscript onboarding steps can run at the same time?

List upload and toll-free verification can run at the same time, because Postscript says the two "are managed independently and can be handled simultaneously" (Postscript Help Center, October 2026). Nothing sends until verification finishes, so the order that compresses a Postscript launch is:

1. Make the store reviewable first. Verification denies a site that isn't live, is password protected or has an unpublished catalog.
2. Have registration details ready on day one. That means a valid business registration number, the full address with suite or unit, and a domain email address.
3. Decide on Postscript's hosted terms early. Postscript can host Messaging Terms and a Messaging Privacy Policy that it maintains and updates itself. They include an arbitration arrangement your legal team will want to read (Postscript's hosted terms guide, October 2026).
4. Upload the existing list while verification runs. Uploading certifies the list was collected in line with the Telephone Consumer Protection Act (TCPA) (Postscript's upload guide, October 2026).
5. Install about 10 days before switching off an old provider, as Postscript suggests when you aren't bringing your number.
6. Send the first campaign between 9am and 8pm Eastern on a weekday. Outside those hours Postscript reviews passively, and a denial waits until business hours resume (Postscript's approval guide, October 2026).

What does Shopify Plus change about Postscript onboarding?

Shopify Plus changes where Postscript collects opt-ins at checkout, not how long any queue takes, because verification, list upload and campaign review are carrier and compliance steps. On a Plus checkout built on checkout extensibility, a merchant adds Postscript's SMS (text message) opt-in, "SMS Opt-In at Checkout", as an app block in Shopify's checkout editor. A setting includes it in Shop Pay express checkout (Postscript Help Center, October 2026), and subscribers confirm with a one-time code sent by text.

Postscript's own plan changes the help you get. Its Professional and Enterprise plans include a "Dedicated Onboarding Specialist" (Postscript, October 2026). Postscript's live chat runs 9am to 8pm Eastern on weekdays, the same window as its campaign review, and Postscript's support targets against Klaviyo's cover what happens outside it. The same two plans can port a toll-free number from Klaviyo: in as little as one day if Twilio hosts it, or about 3 to 5 weeks if not. Expect up to 3 hours of downtime on the transfer day (Postscript's porting guide, October 2026).

How long does a Postscript short code take?

A Postscript short code takes about 4 to 7 weeks or about 14 weeks, depending on which Postscript page you read, so plan on the longer figure.

Both articles show 5 February 2026. Either way a short code takes longer than the toll-free path, because the application waits on a compliance audit of every opt-in source. Postscript's own review of those sources takes 1 to 2 days. Postscript then asks brands not to launch new opt-in methods until 2 weeks after going live (Postscript's timeline article, October 2026). Postscript's short codes also send to the US only (Postscript's comparison article, October 2026).

When should you not commit to a Postscript launch date?

Don't commit to a Postscript launch date while any queue's input is missing, because no escalation compresses a carrier review.