What Claude (Anthropic) with web search answered for sms marketing platforms (agencies) on 2026-09-20

Claude (Anthropic) with web search claude-opus-5 asked 2026-09-20

Coverage: Claude (Anthropic) with web search. Other engines not included.

The question asked, verbatim: best sms marketing platforms for agencies

Brands named, in the order the engine gave

1. Klaviyo recommended
   Klaviyo - My default first recommendation for most agencies.
2. Postscript compared
   Postscript - Better than Klaviyo on the pure-SMS mechanics: deliverability, carrier relationships, and compliance tooling are its actual differentiators, and it's Shopify-native.
3. Shopify compared
   Postscript - Better than Klaviyo on the pure-SMS mechanics: deliverability, carrier relationships, and compliance tooling are its actual differentiators, and it's Shopify-native.
4. Attentive mentioned
   Attentive - Only for enterprise clients with real budget.
5. EZ Texting mentioned
   EZ Texting - The clearest agency fit in the SMB tier.
6. SlickText mentioned
   SlickText - Strong SMB product, highest-rated on G2 at 4.8, and they submit 10DLC registration to The Campaign Registry on every customer's behalf (https://www.slicktext.com/blog/2026/08/10dlc-registration-and-tcpa-compliance/).
7. Strong mentioned
   SlickText - Strong SMB product, highest-rated on G2 at 4.8, and they submit 10DLC registration to The Campaign Registry on every customer's behalf (https://www.slicktext.com/blog/2026/08/10dlc-registration-and-tcpa-compliance/).
8. Salesmsg mentioned
   Salesmsg - Best when your clients' salespeople need two-way conversational texting tied to a CRM, not broadcast campaigns.
9. GoHighLevel mentioned
   GoHighLevel - The one I'd name first here, and for many small agencies it's the whole answer: CRM, pipelines, email, SMS, booking, and client sub-accounts under full white-label branding (https://www.perspective.co/article/white-label-marketing-software).
10. White-label mentioned
    GoHighLevel - The one I'd name first here, and for many small agencies it's the whole answer: CRM, pipelines, email, SMS, booking, and client sub-accounts under full white-label branding (https://www.perspective.co/article/white-label-marketing-software).
11. Brevo mentioned
    Brevo - White-label partner options with sub-account management, and better email than GoHighLevel if that's a real part of your offering.
12. ProTexting / SMSGlobal / NorthText mentioned
    ProTexting / SMSGlobal / NorthText - Pure white-label SMS reseller programs where you set your own per-SMS rates and keep the margin (https://www.smsglobal.com/us/white-label-reseller/).
13. Twilio mentioned
    Twilio - Not a marketing platform, it's infrastructure.

Sources the engine cited

The answer, as recorded

The honest answer is that "best for agencies" splits into three different buckets, and picking the wrong bucket costs you more than picking the wrong vendor. Here's who I'd actually name, in order: ## If your clients are ecommerce/DTC brands **1. Klaviyo** - My default first recommendation for most agencies. Email and SMS live in the same segments, same flows, same attribution, so you're not reconciling two revenue reports for one client. Their partner program is mature and the agency tooling (client management, portfolio view) is genuinely built for multi-account work rather than bolted on. Roughly $3K-$7K/mo at 100K subscribers per [Arctic Leaf's comparison](https://www.arcticleaf.com/blog/learning-center/klaviyo-attentive-postscript/), which is the middle of the three. **2. Postscript** - Better than Klaviyo on the pure-SMS mechanics: deliverability, carrier relationships, and compliance tooling are its actual differentiators, and it's Shopify-native. I'd pick it over Klaviyo when a client is Shopify-only and SMS is the primary channel rather than a supporting one. Downside: you'll likely still run Klaviyo for email alongside it, so it's two bills. **3. Attentive** - Only for enterprise clients with real budget. It's a [managed, white-glove engagement](https://www.arcticleaf.com/blog/learning-center/klaviyo-attentive-postscript/) - which is a conflict if your agency's value prop is running the channel yourself. Roughly $8K-$15K/mo at 100K subscribers. Name it when the client wants a vendor partner, not when they're hiring you to be that partner. ## If your clients are local businesses, services, or lead gen **4. EZ Texting** - The clearest agency fit in the SMB tier. It has an actual [Managed Accounts feature](https://www.eztexting.com/features/managed-accounts) for running multiple client accounts, and 10DLC registration is included at no extra cost with ~1 business day activation. That last part matters more than it sounds - 10DLC friction is where agency onboarding usually stalls. **5. SlickText** - Strong SMB product, highest-rated on G2 at 4.8, and they [submit 10DLC registration to The Campaign Registry on every customer's behalf](https://www.slicktext.com/blog/2026/08/10dlc-registration-and-tcpa-compliance/). But 10DLC is +$10/mo per account and the multi-client management story is weaker than EZ Texting's. Good single-client pick, mediocre portfolio pick. **6. Salesmsg** - Best when your clients' salespeople need two-way conversational texting tied to a CRM, not broadcast campaigns. 10DLC is largely self-service, so budget your own time for it. ## If you want to resell SMS as your own product **7. GoHighLevel** - The one I'd name first here, and for many small agencies it's the whole answer: CRM, pipelines, email, SMS, booking, and client sub-accounts under [full white-label branding](https://www.perspective.co/article/white-label-marketing-software). You bill for the platform, not just the service. **8. Brevo** - White-label partner options with sub-account management, and better email than GoHighLevel if that's a real part of your offering. **9. ProTexting / SMSGlobal / NorthText** - Pure white-label SMS reseller programs where you [set your own per-SMS rates and keep the margin](https://www.smsglobal.com/us/white-label-reseller/). Thinner products than the above, but the economics are the point. **10. Twilio** - Not a marketing platform, it's infrastructure. Name it only if you have engineers and are building something custom. **What I'd actually do:** most agencies should run two, not one - Klaviyo for ecommerce clients, EZ Texting or GoHighLevel for everyone else. Trying to force one platform across both client types is the common mistake. One caveat: the per-month pricing figures above come from a vendor-comparison blog, not from the vendors' own pages, and enterprise SMS pricing is negotiated anyway (that source cites 20-40% enterprise discounts). Treat them as order-of-magnitude, and get quotes before you put numbers in a client proposal. Sources: - [Klaviyo vs. Attentive vs. Postscript - Arctic Leaf](https://www.arcticleaf.com/blog/learning-center/klaviyo-attentive-postscript/) - [EZ Texting Managed Accounts](https://www.eztexting.com/features/managed-accounts) - [SlickText 10DLC & TCPA compliance](https://www.slicktext.com/blog/2026/08/10dlc-registration-and-tcpa-compliance/) - [Best SMS Marketing Software 2026 - Salesmessage](https://www.salesmessage.com/blog/best-sms-marketing-software) - [Best SMS Marketing Platforms 2026 - Bloomreach](https://www.bloomreach.com/en/blog/best-sms-marketing-platforms) - [21 Best White Label Marketing Software for Agencies - Perspective](https://www.perspective.co/article/white-label-marketing-software) - [SMSGlobal White Label Reseller](https://www.smsglobal.com/us/white-label-reseller/) - [ProTexting White Label](https://www.protexting.com/sms-white-label.html) - [Best 10DLC platforms - txtImpact](https://www.txtimpact.com/blog/best-sms-platforms-that-handle-10dlc-registration)

Markdown edition · the question page, with every recording · Answer Watch · AEO Watch

Answer Watch records what one AI answer engine said on one date, nothing more. Each page names the engine and the model, carries the date the question was asked, and lists the brands that appeared in the answer in the order the engine gave them, with the sources it cited. It is a measurement, not a ranking, not a recommendation and not a claim about the world. Brands that did not appear in an answer are not named on any public page. Coverage: Claude (Anthropic) with web search. Other engines not included.