Moving SMS marketing from Attentive to HubSpot means more than pointing a new phone number at your contact list. Carriers require formal registration, HubSpot needs specific consent documentation, and your marketing automation (tracking codes, abandoned-cart triggers, deliverability rules) has to be rebuilt inside HubSpot's workflow engine.
This checklist walks through every required step: 10DLC long-code registration, setting up two-way messaging in the CRM inbox, reconnecting tracking codes so behavior-based triggers keep working, and the compliance details (quiet hours, opt-in requirements, forbidden content) that determine whether carriers approve your campaign on the first try.
If your team is evaluating how this migration fits into a broader HubSpot rollout, Vantage Point's HubSpot services can help plan the sequencing so SMS, email, and CRM data move together instead of breaking apart mid-migration.
What it is: A step-by-step process for registering a 10DLC SMS number in HubSpot, migrating consent and messaging workflows off Attentive, and reconnecting the automation (tracking codes, abandoned-cart triggers, deliverability rules) that made your Attentive program work.
Who it matters for: Marketing operations teams, HubSpot admins, and e-commerce or B2B marketers currently running SMS through Attentive who are consolidating messaging into HubSpot's Marketing Hub.
What decision it supports: Whether to migrate now, what to prepare before submitting a 10DLC registration, and how to avoid the compliance gaps that cause carrier rejections or delayed approval.
Why Vantage Point is relevant: Vantage Point implements HubSpot Marketing Hub, CRM data migrations, and automation rebuilds for teams switching platforms, including the workflow and tracking-code reconstruction this migration requires.
An Attentive-to-HubSpot SMS migration is the process of shutting down SMS sending through Attentive and standing up HubSpot's native Marketing SMS tool as the new system of record for text messaging, consent, and automation triggers. Unlike an email migration, this isn't a simple export-and-import: HubSpot requires you to register a new phone number with mobile carriers, resubmit consent language, and rebuild any workflows that triggered messages based on customer behavior.
SMS consolidation into HubSpot removes the integration layer between your SMS vendor and your CRM. Instead of syncing contact and event data between two systems, HubSpot's CRM inbox handles two-way SMS conversations directly on the contact record, and workflows can trigger sends from the same data used for email and lifecycle automation.
The tradeoff is that HubSpot's carrier compliance requirements tightened going into 2026. Carriers have added detailed consent documentation requirements for 10DLC campaign registration, and HubSpot now requires screenshot or file evidence for every opt-in method you select — not just a description. Teams that treat this as a copy-paste migration from Attentive's registration package often get rejected on the first submission.
| Factor | Long Code (10DLC) | Short Code |
|---|---|---|
| Approval time | 6–8 business days | 8–12 weeks |
| Number format | 10-digit, resembles a phone number | 5–6 digit number |
| Required subscription | Marketing Hub Pro or Enterprise | Marketing Hub Enterprise + SMS Limit Increase |
| Message throughput | Variable, based on carrier trust score | High |
| Cost | Lower | Higher |
| Best for | Two-way conversations, moderate campaign volume | High-volume broadcast campaigns |
Most teams migrating from Attentive's long-code programs should start with HubSpot's Marketing SMS Add-on (10DLC), since approval is faster and it supports two-way conversations natively in the CRM inbox.
In HubSpot Settings → SMS, complete the business registration: legal business name, EIN (US) or business number (Canada), business type, industry, website, and regions of operation. This information must match your official business registration exactly — mismatches are a common cause of carrier rejection.
This is the step most teams underestimate when migrating from Attentive, because HubSpot's current requirements go beyond a written description of your opt-in process:
If Attentive fired messages off events like checkout-page visits or cart abandonment, those triggers need to be rebuilt as HubSpot workflows using tracking-code events and page-view data. A common rebuild pattern:
Once your number is approved, enable the SMS channel in the Conversations inbox so replies route to the correct contact record and rep. This is the main functional upgrade over Attentive: reps can see SMS threads alongside email and call history on the same timeline.
HubSpot's 10DLC long-code SMS numbers cannot receive inbound phone calls. If customers try to call the number back, they'll reach a dead end unless you plan for it. The common workaround is including a separate support or callback phone number in your SMS message content and terms of service, so recipients always have a way to reach a live line.
Vantage Point helps marketing and RevOps teams plan and execute platform consolidations like this one. For an Attentive-to-HubSpot SMS migration, that typically includes:
If your team is evaluating how this applies to HubSpot, Salesforce, integrations, or CRM governance, Vantage Point can help assess the right next step and build a practical implementation plan.
Can I migrate my existing Attentive contact list directly into HubSpot's SMS tool? You can import contacts into HubSpot, but SMS consent does not transfer automatically — HubSpot requires its own opt-in documentation as part of carrier registration, so you'll need to demonstrate that recipients consented to SMS messaging under HubSpot's terms, not just Attentive's.
How long does HubSpot SMS registration take? Long code (10DLC) registration typically takes six to eight business days for carrier approval. Short code registration takes eight to twelve weeks. Plan your Attentive cancellation date around whichever option you choose.
What's the most common reason HubSpot SMS registrations get rejected? Missing or inconsistent consent documentation is the leading cause of rejection — carriers now require screenshot or file evidence for every opt-in method selected, not just a written description.
Can HubSpot's SMS number receive inbound phone calls? No. 10DLC long-code numbers used for SMS in HubSpot cannot receive inbound calls. Include a separate callback or support phone number in your messaging and terms of service so customers always have a way to reach your team.
Do I need Marketing Hub Enterprise to send SMS in HubSpot? No. The Marketing SMS Add-on (long code) requires Marketing Hub Professional or Enterprise. Short code SMS requires Marketing Hub Enterprise plus the SMS Limit Increase add-on.
Can I use the same consent checkbox for email and SMS opt-in? No. Carriers require a separate, unchecked checkbox specifically for Marketing SMS consent — it cannot be combined with email consent or any other channel's opt-in on the same form.
What quiet hours apply to HubSpot SMS marketing messages? Marketing SMS messages should only be sent between 8 AM and 8 PM in the recipient's local time zone, consistent with standard SMS marketing compliance practices.
Will my abandoned-cart SMS workflows work the same way in HubSpot as they did in Attentive? Not automatically. You'll need to rebuild the trigger logic using HubSpot workflows and tracking-code page-view events (such as a checkout-page visit without a completed purchase), then test it before go-live to confirm timing matches your previous Attentive setup.