What Claude (Anthropic) with web search answered for sms marketing platforms (agencies) on 2026-09-23

Claude (Anthropic) with web search claude-opus-5 asked 2026-09-23

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. GoHighLevel mentioned
   GoHighLevel - The default for agencies, and it's not close in market share.
2. Salesmsg mentioned
   Salesmsg - The best pick when you don't want a whole CRM.
3. HubSpot mentioned
   It has a genuine multi-organization environment for switching between client workspaces, and it's the strongest of the group at two-way conversational texting tied to HubSpot/ActiveCampaign.
4. ActiveCampaign mentioned
   It has a genuine multi-organization environment for switching between client workspaces, and it's the strongest of the group at two-way conversational texting tied to HubSpot/ActiveCampaign.
5. EZ Texting mentioned
   EZ Texting - Managed accounts, easy onboarding, good for high-volume broadcast work with non-technical clients.
6. SlickText mentioned
   SlickText - Highest-rated on G2 (4.8) and the one I'd hand to a client who'll log in themselves.
7. Brevo mentioned
   Brevo - Worth a look specifically for the sub-account architecture: central admin, separate IPs/API keys and permissions per client, plus email/WhatsApp/chat in the same suite.
8. Klaviyo recommended
   Klaviyo - My default recommendation.
9. Postscript mentioned
   Postscript - Shopify-native, SMS-first, more aggressive pricing than Attentive (~$5K-$10K at 100K subs).
10. Shopify mentioned
    Postscript - Shopify-native, SMS-first, more aggressive pricing than Attentive (~$5K-$10K at 100K subs).
11. Attentive mentioned
    Postscript - Shopify-native, SMS-first, more aggressive pricing than Attentive (~$5K-$10K at 100K subs).

Sources the engine cited

The answer, as recorded

Agencies actually fall into two buckets here, and the right answer differs sharply depending on which you're in - so I'll name the picks in order, flagging the fit. ## If you're running clients' programs under your own brand (local/service businesses) **1. GoHighLevel** - The default for agencies, and it's not close in market share. You get white-label branding, client sub-accounts, rebilling, and "SaaS Mode" so you resell at your own margin. $97/$297/$497 per month at the agency level with unlimited users and contacts; what scales is sub-accounts and rebilling. Messaging is metered on top - roughly $0.0075/segment plus carrier fees plus a 5% markup, so budget ~$11.47 per 1,000 segments, not $7.47. The real operational tax: A2P 10DLC registration happens per sub-account, not agency-wide (~$24.50 one-time, $2-10/campaign/month), so onboarding each client has friction. Pick it if SMS is one piece of a CRM/funnel/booking stack you're selling. **2. Salesmsg** - The best pick when you don't want a whole CRM. It has a genuine multi-organization environment for switching between client workspaces, and it's the strongest of the group at two-way conversational texting tied to HubSpot/ActiveCampaign. Cleaner and far less bloated than GHL if your clients already have their own CRM. **3. EZ Texting** - Managed accounts, easy onboarding, good for high-volume broadcast work with non-technical clients. Cheapest path to "just send campaigns and grow a list." **4. SlickText** - Highest-rated on G2 (4.8) and the one I'd hand to a client who'll log in themselves. Pure marketing broadcast focus, good list-growth tooling, less agency plumbing than the above. **5. Brevo** - Worth a look specifically for the sub-account architecture: central admin, separate IPs/API keys and permissions per client, plus email/WhatsApp/chat in the same suite. Cheapest multi-client option if you're EU-heavy. ## If your clients are ecommerce/DTC (you manage *their* accounts, they own the contract) **6. Klaviyo** - My default recommendation. If the client is already on Klaviyo for email, adding SMS there beats bolting on a second tool, and the segmentation carries over. Roughly $3K-$7K/mo at 100K subscribers - the cheapest of the three. Mostly DIY, which is exactly what you want as the agency doing the work. **7. Postscript** - Shopify-native, SMS-first, more aggressive pricing than Attentive (~$5K-$10K at 100K subs). Best when SMS is a serious standalone revenue channel and you want deeper texting-specific automation than Klaviyo gives. **8. Attentive** - The enterprise pick, ~$8K-$15K at 100K subs (20-40% enterprise discounts exist). Comes with strategy and onboarding support, which cuts both ways for an agency - great for large clients, redundant if you're the strategist. **Honest caveat:** none of these let you fully escape A2P 10DLC per-client registration in the US - it's carrier-mandated, not a platform choice. Budget onboarding time for it regardless of what you pick. And if you go GHL's SaaS Mode route, you're now the support desk for deliverability problems you don't control. Sources: - [Best SMS Marketing Software in 2026: 20 Platforms Compared - Salesmessage](https://www.salesmessage.com/blog/best-sms-marketing-software) - [Best SMS Marketing Platforms for 2026 - SlickText](https://www.slicktext.com/blog/2025/10/best-sms-marketing-platforms/) - [GoHighLevel Pricing in 2026 - Apexure](https://www.apexure.com/blog/gohighlevel-pricing) - [GoHighLevel A2P 10DLC Registration: Sub-Accounts (2026) - OptInFix](https://optinfix.com/blog/gohighlevel-a2p-10dlc-registration-for-sub-accounts-2026) - [A2P 10DLC Fees Explained (2026) - GHL Scale Up](https://www.ghlscaleup.com/blog/a2p-10dlc-fees-explained) - [Klaviyo vs Attentive vs Postscript: An Operator's SMS Comparison (2026)](https://appstoreresearch.com/blog/klaviyo-vs-attentive-vs-postscript) - [Klaviyo vs. Attentive vs. Postscript - Arctic Leaf](https://www.arcticleaf.com/blog/learning-center/klaviyo-attentive-postscript/) - [21 Best White Label Marketing Software for Agencies (2026) - Perspective](https://www.perspective.co/article/white-label-marketing-software) - [25+ Best White-Label Tools for Agencies in 2026 - TextUs](https://textus.com/blog/white-label-tools-for-agencies)

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.