The best SMS marketing platforms for agencies in 2026
How eight platforms handle separate clients, numbers, opt-outs and billing, and what five clients cost on each.
We make TextScaleHQ, which is on this list. Details come from each company’s own website and help center, checked October 21, 2026, with links. Salesmsg’s in-between tiers and extra-credit rates from Hackceleration.
Key takeaways
- Only some platforms keep clients separate in one login: TextScaleHQ, SlickText, ClickSend, EZ Texting (from $125) and Salesmsg (a plan per client).
- SimpleTexting, Textedly and new Textmagic accounts need a separate account per client.
- ClickSend has the only full white-label reseller program we found ($30 a month plus setup fees).
- For five clients sending 20,000 texts a month, totals run from about $462 to $815.
What an agency needs
Its own number, contact list and opt-outs. Someone who texts STOP to one client must stay opted out of that client, without touching the others.
Carriers register the business that sends. Each client needs its own toll-free verification or 10DLC brand.
Results per client, ideally without the platform’s name or your costs on them.
What the tenth client costs matters more than the first.
How each platform handles clients
| Platform | Separate clients | Cost per client | Each client’s own number, list and opt-outs | Billing and white label |
|---|---|---|---|---|
| TextScaleHQ | Businesses: 2 on Starter, 5 on Growth, unlimited on Pro | Included in the plan | Yes, on its own Twilio or Vonage account if you like | You bill clients yourself; printable client reports without our name |
| SlickText | Brands | Not published (“may” cost extra) | Yes, per brand | One bill, or SlickText bills each client; reseller program |
| ClickSend | Unlimited sub-accounts | Free; shared prepaid balance | Configurable; own number recommended | White-label reseller account, $30 a month plus setup fees, your own markup |
| EZ Texting | Managed Accounts | Needs the $125 Scale plan or Enterprise | Not stated on its site | Shared credit bundle |
| Salesmsg | Unlimited organizations via its Agency Portal | A full plan per client, from $25 | Yes, with its own 10DLC registration | You or the client pays; no white label |
| Textmagic | Sub-accounts closed to new sign-ups since May 2024 | A separate account per client | Only with separate accounts | No rebilling or white label |
| SimpleTexting | None; extra numbers are inbox-only | A separate account per client, from $29 | Only with separate accounts | Per account |
| Textedly | None | A separate account per client, from $29 | Only with separate accounts | Per account |
SlickText brands, SlickText agencies, ClickSend sub-accounts, EZ Texting managed accounts, Salesmsg Agency Portal, Salesmsg organizations, Textmagic sub-accounts, SimpleTexting multi-number, Textedly pricing
What five clients cost
Five clients with 1,000 contacts each, texted four times a month: 20,000 texts in all. List prices, with carrier fees and a toll-free number per client where the platform charges for one.
| Platform | Monthly total | How we priced it |
|---|---|---|
| TextScaleHQ (Pro) | $461.75 | Pro plan, Twilio texts and carrier fees, 5 toll-free numbers |
| Textmagic BYOC | $462.75 | Five accounts on your own Twilio, 1¢ a text each |
| ClickSend | $505.40 | At the 2.03¢ rate its calculator shows at 10,000 texts, with its flat carrier fee and 5 toll-free numbers |
| SlickText | $663.00 | 25,000-credit plan shared across brands, plus carrier fees; extra brand cost not published |
| Salesmsg | $788.75 | Five organizations, each on Basic 2,500 plus extra credits |
| SimpleTexting | $795.00 | Five separate accounts on 3,000 credits plus extras |
| EZ Texting | $810.00 | Scale plan plus 19,500 extra texts at 3¢, and toll-free numbers for clients 2 to 5 at $25 each |
| Textedly | $815.00 | Five accounts on Enterprise (3,500 texts) plus a 500-text block and the $8 telecom surcharge |
ClickSend prices come from its own pricing page, checked October 21, 2026. Textmagic BYOC and TextScaleHQ both use Twilio’s list price; they come out almost the same at this size.
How TextScaleHQ does it
- Every client is a business with its own number, subscribers, opt-outs, sign-up forms and AI Promo plan.
- A client can use your Twilio account or its own; opt-outs never cross between businesses either way.
- One report shows every business; print one client’s report without costs or the TextScaleHQ name.
- Store the client’s name, email, phone and notes; pause a client to free a slot and keep its data.
- Two businesses on Starter ($29), five on Growth ($59), unlimited on Pro ($199).
Which to pick
TextScaleHQ or SlickText, which keep each client’s number, list and opt-outs apart inside one login.
ClickSend’s white-label reseller account ($30 a month plus setup fees) is the only one we found with your own domain and markup.
Salesmsg organizations or EZ Texting Managed Accounts, which come with shared inboxes.
Separate accounts on any platform work; compare the cost per account.
Questions
Can an agency send texts for several clients from one account?
Yes, on platforms with sub-accounts or separate businesses: TextScaleHQ, SlickText, ClickSend, EZ Texting (Scale plan and up) and Salesmsg. On SimpleTexting, Textedly and new Textmagic accounts, each client needs its own account.
Does each client need its own phone number?
In practice yes. Carriers register the business that sends, so each client needs its own verified toll-free number or 10DLC registration.
Can I white-label an SMS platform?
ClickSend offers a white-label reseller account for $30 a month plus setup fees, with your own domain and markup. SlickText has a reseller program. Salesmsg says it doesn’t offer white labeling.
How do opt-outs work across clients?
On platforms that keep clients separate, a STOP applies to that client only. Make sure one client’s opt-outs can’t be overwritten by another’s import.
Which is cheapest for five clients?
In our example of 20,000 texts a month, TextScaleHQ and Textmagic on your own Twilio come in lowest, at about $462 to $463, then ClickSend at about $505.
SimpleTexting, EZ Texting, SlickText, Textmagic, Salesmsg, Textedly, ClickSend, Twilio and Vonage are trademarks of their owners. TextScaleHQ isn’t affiliated with or endorsed by any of them.
