How to Choose SMS Marketing Software
Knowing how to choose SMS marketing software is the difference between a channel that drives real revenue and one that burns budget on undelivered messages, compliance fines, and churn from annoyed subscribers. This guide gives you a concrete evaluation framework, the right questions to ask vendors, and a shortlist of the top platforms for 2026.
What SMS marketing software does
SMS marketing platforms sit above the raw carrier infrastructure. They let you build and segment subscriber lists, schedule or automate campaigns, send MMS (images, GIFs, short video), and hold two-way conversations with customers, all without touching a messaging API directly.
The distinction matters: a raw API like Twilio gives you programmable messaging but no campaign UI, compliance guardrails, or analytics dashboards out of the box. Marketing platforms built on top of those APIs handle the operator-facing complexity so your team can focus on strategy and copy. If you need deep custom logic, a developer-first platform or a hybrid approach may be better, but most marketing teams want the tooling layer, not the plumbing.
Key facts
- SMS open rates sit at 98%, with 90% of messages read within 3 minutes of delivery, compared to roughly 20% for email.
- SMS response rates average 45%, versus 6% for email, making it the highest-engagement channel most brands have available.
- 29% of SMS recipients click on links in messages, and 47% of those clicks result in a purchase, per Optimonk's 2026 SMS statistics roundup.
What to look for
The table below covers the nine criteria that separate capable platforms from ones that look good in a demo but fail in production.
| Criterion | What good looks like | Watch out for |
|---|---|---|
| Deliverability and carrier relationships | Direct carrier agreements, published deliverability rates, active 10DLC/short-code management | Shared short codes, vague deliverability claims, no SLA on send success rates |
| Compliance: TCPA, 10DLC, opt-in | Built-in double opt-in flows, automatic opt-out handling (STOP), 10DLC brand and campaign registration support | Manual opt-out management, no audit trail, unclear who owns registration |
| Automation and segmentation | Behavioral triggers, conditional splits, list filters by purchase history or engagement | Flat blast-only tooling with no branching logic |
| Two-way and conversational messaging | Shared team inbox, assignment routing, auto-replies, conversation history | Inbound messages delivered only by webhook or not at all |
| Ecommerce and CRM integrations | Native Shopify, WooCommerce, Klaviyo, HubSpot connectors with real-time sync | Only CSV imports, brittle Zapier bridges |
| MMS and rich messaging | True MMS (images, GIFs, video), link shortening with click tracking | Extra per-credit charge for MMS with no preview in the composer |
| Analytics and attribution | Revenue attribution per campaign, unsubscribe rates, click-through rates, A/B test results | Vanity metrics only (sends, no revenue link) |
| Pricing model | Transparent per-message rates, credit rollover, no hidden carrier surcharges | Credits that expire monthly, opaque overages, carrier fees baked invisibly into stated rates |
| International and short codes | Dedicated short codes, toll-free, local numbers, multi-country support | US-only with no path to international as you scale |
Key questions to ask before you buy
- What is your registered deliverability rate for A2P 10DLC traffic on T-Mobile and AT&T? Ask for actual figures, not just a promise. Carriers block 100% of unregistered A2P traffic as of February 2025, so the answer also tells you how mature their compliance operation is.
- Who handles 10DLC brand and campaign registration? Some platforms charge a one-time setup fee and manage it for you. Others hand you a form and leave you to navigate the CTIA's messaging guidelines alone.
- How does your platform handle TCPA opt-in consent documentation? You need a timestamped record of when and how each subscriber opted in. Ask whether that evidence is stored in the platform and exportable.
- What happens to messages when a subscriber sends STOP? The answer should be: instant removal, no further sends, and a suppression list that survives list imports.
- Are carrier fees included in your stated per-message rate, or added on top? Carrier surcharges for 10DLC messages run roughly $0.003 to $0.005 per SMS. Platforms that bury these produce invoices that are 30 to 60% higher than the quoted rate.
- Can I A/B test send times and message copy, and does the platform attribute revenue to the winning variant? Revenue attribution separates tools built for ecommerce from generic bulk-SMS senders.
- What is your uptime SLA and how do you handle carrier outages? Promotional sends on Black Friday need a fallback, not a post-mortem.
Top options at a glance
| Platform | Best for | Starting price |
|---|---|---|
| Klaviyo SMS | Email-first brands wanting unified email and SMS | ~$30/month (bundled with email plan) |
| Attentive | Enterprise ecommerce, AI-driven personalization | Custom (typically $1,000+/month) |
| Postscript | Shopify merchants, SMS-only focus | From ~$100/month, pay-per-message tiers |
| SimpleTexting | SMBs, non-profits, local businesses | From $39/month for 500 credits |
| EZ Texting | Retail, events, brick-and-mortar | From $25/month, credit-based |
| Twilio (Programmable Messaging) | Developer teams, custom workflows, API-first | ~$0.0083 per SMS, pay-as-you-go |
| Sendlane | Ecommerce brands wanting email plus SMS in one platform | ~$50/month for 2,500 SMS credits |
For the full head-to-head on the underlying messaging platforms, see our Twilio alternatives roundup.
If you're comparing SMS-capable email platforms, the Mailchimp alternatives guide covers several options that include SMS as part of their marketing suite.
How to choose: a decision framework
| Business type | Recommended starting point | What to prioritize |
|---|---|---|
| Ecommerce on Shopify (up to $5M GMV) | Postscript or Klaviyo SMS | Native Shopify integration, revenue attribution, automated abandoned-cart flows |
| Ecommerce on Shopify (enterprise, $5M+) | Attentive | AI personalization, list growth tools, dedicated CSM, enterprise compliance |
| Ecommerce on other platforms (WooCommerce, BigCommerce) | Sendlane or Klaviyo SMS | Platform-agnostic connectors, unified email plus SMS reporting |
| B2B: sales follow-up, appointment reminders | SimpleTexting or EZ Texting | Two-way inbox, CRM integrations, team routing |
| High-volume: 500k+ sends/month | Attentive or Postscript (volume tier) | Carrier relationships, deliverability SLA, short code support |
| Developer or API-first | Twilio Programmable Messaging | Flexible API, pay-as-you-go, full control over logic and compliance handling |
Pair your SMS choice with the right automation layer. The marketing automation software guide covers the broader stack that SMS platforms typically plug into.
Pricing: what to expect
SMS software pricing has three separate components, and most buyers only see the first one in the vendor's pricing page.
Platform fee. Monthly or annual subscription covering your subscriber list, seats, and features. Ranges from $25 to $39 per month for SMB tools up to $1,000 or more per month for enterprise platforms. Mid-market ecommerce brands typically pay $150 to $500 per month.
Per-message cost. Charged per SMS sent (one credit) or per MMS (typically two to three credits). Rates generally run $0.008 to $0.03 per SMS depending on volume tier and platform. Twilio's pay-as-you-go rate is $0.0083 per message. EZ Texting's enterprise tier drops to $0.01. MMS costs two to three times the SMS rate.
Carrier and compliance fees. This is the hidden cost most buyers miss. A2P 10DLC registration adds a one-time brand registration fee (around $4 for sole proprietors, $48 for standard businesses), a campaign registration fee of $15 to $17 per use case, a monthly per-campaign fee of $1.50 to $10, and a per-message carrier surcharge of $0.003 to $0.005 per SMS. If you run unregistered traffic, carriers charge $0.012 per message in surcharges and block your sends. Dedicated short codes cost $500 to $1,000 per month and require separate carrier approval.
For high-volume senders, run a total cost of ownership model before signing. The TCO modeling guide for SaaS walks through the full framework for comparing software spend across tiers. For ecommerce-specific comparisons, see also how to choose email marketing for ecommerce and how to choose email marketing software.
Frequently asked questions
Do I need to register for 10DLC before sending SMS marketing messages?
Yes. Since February 2025, carriers block 100% of unregistered A2P (application-to-person) 10DLC traffic. Every business sending marketing texts in the US must register a brand and at least one campaign through The Campaign Registry. Most SMS marketing platforms handle this for you as part of onboarding, but verify this before signing up. Unregistered sends don't just bounce: carriers charge $0.012 per message in penalty surcharges on top of blocking them.
What is the difference between a short code, toll-free number, and local number for SMS?
A short code (five or six digits) handles very high volume and has pre-approved carrier status, but costs $500 to $1,000 per month and takes weeks to provision. A toll-free number is cheaper and faster to set up, good for moderate volume and two-way conversations. A local 10-digit number (10DLC) is the most common choice for most businesses: lower cost, 10DLC registered, and feels more personal to recipients. Most platforms start you on a local number and let you upgrade.
Can I use SMS marketing for B2B, or is it only for consumer brands?
SMS works well in B2B for appointment reminders, sales follow-up sequences, event notifications, and customer success check-ins. But B2B requires the same TCPA consent as B2C: opt-in at the point of contact (webform, trade show, call) with clear disclosure that they'll receive texts. Platforms like SimpleTexting and EZ Texting serve B2B use cases well. Most ecommerce-focused tools (Attentive, Postscript) are less suited here.
How does SMS integrate with email marketing?
The cleanest setups use a platform that handles both channels in one place (Klaviyo, Sendlane), so a subscriber's email engagement history informs SMS send logic and vice versa. If you prefer best-of-breed, most SMS platforms offer native integrations with Klaviyo, HubSpot, and Mailchimp, letting you sync list segments and suppress contacts who've already converted via email. See the email marketing software guide and the ecommerce platform guide for related stack decisions.
What opt-in consent is required for SMS marketing?
TCPA requires prior express written consent for marketing texts. That means a subscriber must affirmatively check a box (or otherwise sign) agreeing to receive promotional SMS from your brand, with a clear disclosure of message frequency and that message-and-data rates may apply. Pre-checked boxes don't count. The consent record (timestamp, IP, disclosure text) must be retained. Violations carry $500 to $1,500 per message in statutory damages with no cap on total liability.
Choosing the right SMS platform for your next stage
The SMS marketing software market has matured enough that the tools are no longer the bottleneck. Deliverability discipline, compliance infrastructure, and tight integration with your ecommerce and email stack are what separate a profitable SMS program from one that stalls out after the first few campaigns. Start with the criteria table, ask the questions in section three, and let your business model steer you to the shortlist that fits.
