Best SMS Tools for SDRs in 2026
Email reply rates keep sliding. LinkedIn inbox quotas keep tightening. SMS sits in the gap, and the SDRs running it well are pulling 30-40% reply rates on warmed prospects. The catch: cold-blast SMS to a never-engaged list is a fast way to torch your sending number and pick up a TCPA complaint. This guide is for B2B reps who want SMS as a layered follow-up channel, ranked by deliverability, compliance support, and how cleanly each tool slots into a real outbound workflow.
Quick Comparison
| Tool | Score | Starting Price |
|---|---|---|
| Salesmsg | 8.4/10 | $25/mo |
| Heymarket | 7.9/10 | $49/user/mo |
| Smarter Contact | 8.2/10 | $197/mo + usage |
| Sakari | 7.6/10 | $16/mo |
| SimpleTexting | 7.2/10 | $39/mo |
| Outreach SMS | 7.4/10 | Add-on to Outreach |
| Salesloft Sales Texting | 7.3/10 | Add-on to Salesloft |
In This Guide
- Salesmsg (8.4/10)
- Heymarket (7.9/10)
- Smarter Contact (8.2/10)
- Sakari (7.6/10)
- SimpleTexting (7.2/10)
- Outreach SMS (7.4/10)
- Salesloft Sales Texting (7.3/10)
How We Ranked These Tools
Five criteria, weighted for SDR reality:
- Deliverability and carrier relationships, including A2P 10DLC support, number rotation, and how the platform handles carrier filtering.
- Compliance tooling: built-in opt-out handling, quiet hours, consent capture, and TCPA-friendly workflows.
- CRM integration depth. Native Salesforce, HubSpot, and Outreach/Salesloft connections versus Zapier-only.
- Pricing and volume capacity. Cost per message at the volumes SDRs send in the real world (500 to 5,000 per rep per month).
- Workflow fit for sales reps: sequence steps, two-way conversation UI, mobile apps, shared inboxes.
Salesmsg was built for B2B sales teams, and it shows in the integration layer. Native Salesforce and HubSpot connectors let SMS fire from inside your existing workflows: send a text when a deal hits a stage, when a contact opens a sequence email, or when a meeting no-shows. The shared inbox view keeps SDRs and AEs aligned on prospect conversations, and the desktop app is faster than most competitors. Pricing starts at $25/mo for 500 segments and scales linearly. Compliance handling is solid, with automated opt-out, A2P 10DLC registration help, and quiet hours enforced platform-wide. For SDR teams sending under 5K SMS per rep per month to B2B contacts, this is the cleanest fit.
- Native Salesforce and HubSpot integrations with workflow triggers
- Shared inbox for SDR plus AE collaboration on the same prospect
- Clean A2P 10DLC registration flow and built-in opt-out handling
- Per-segment pricing gets expensive past 10K messages a month
- No ringless voicemail or skip tracing for consumer-style outbound
- Reporting is functional but thinner than Outreach or Salesloft
Heymarket leans into team SMS. Multiple reps can work the same inbox, assign threads, and hand off prospects without losing context. MMS is supported on every plan, which matters if your team sends product screenshots or short video walkthroughs. The mobile apps are solid, so AEs can reply to inbound texts from their phone without losing CRM visibility. Pricing is per-user and gets pricier than Salesmsg once you scale past 3-4 reps, but the shared-inbox UX is worth it for teams running a pod-based motion where one SDR books and an AE follows up by text. HubSpot and Salesforce integrations are decent, though not as deep as Salesmsg's workflow triggers.
- Shared team inbox is the cleanest of any SMS tool reviewed here
- MMS included on every plan, useful for product visuals
- Strong iOS and Android apps for AEs working off their phones
- Per-user pricing scales fast for larger teams
- CRM workflow triggers are shallower than Salesmsg
- No high-volume blast tooling for outbound-heavy motions
Smarter Contact sits in a different category than the rest of this list. It was built for the high-volume outbound playbook used by real estate investors, mortgage lead-gen teams, solar installers, debt relief firms, and insurance brokers. The infrastructure handles tens of thousands of messages per rep per month without falling over, the carrier deliverability is strong, and the platform layers in ringless voicemail and skip tracing that most B2B SMS tools do not offer. If your SDR team runs consumer-style outbound, this is the workhorse.
For pure B2B SaaS SDRs emailing CTOs about DevOps tools, Smarter Contact is overkill. The volume capacity, the consumer-focused features, and the pricing model assume you're running thousands of dials and texts a day, not 50 highly targeted touches. That said, the ringless voicemail feature is rare enough that if your sequences include voicemail drops to mobile numbers, it's worth a look even outside the real-estate ICP. Compliance tooling is mature, with A2P 10DLC support, opt-out routing, and number rotation built in.
- Infrastructure handles 10K+ messages per rep per month
- Ringless voicemail and skip tracing built in
- Designed for real estate, mortgage, solar, debt relief, insurance lead-gen
- Overkill for pure B2B SaaS SDR motions
- Higher entry price than Salesmsg or Sakari
- CRM integrations narrower than Salesforce-native tools
Sakari is the developer-friendly pick. Two-way SMS, a clean REST API, webhooks for inbound replies, and Zapier connections to almost everything. If your RevOps team wants to build custom triggers (text the AE when a Gong call mentions a competitor, ping the SDR when a Calendly meeting is booked, alert ops when a high-value prospect replies "yes"), Sakari makes that buildable without enterprise pricing. The UI is more functional than polished, but for teams comfortable wiring things up, it punches above its weight. Pricing starts at $16/mo for 500 messages, which is the cheapest entry point on this list.
- Cheapest entry price among reviewed tools
- Clean REST API and webhook support for custom workflows
- Solid two-way conversation UI with desktop and mobile apps
- Native CRM integrations thinner than Salesmsg or Heymarket
- Best value requires technical setup most SDRs won't do solo
- No high-volume blast tooling for consumer outbound
SimpleTexting straddles marketing SMS and sales texting. If your team runs both inbound nurture blasts (event reminders, drip sequences, opt-in promos) and outbound 1:1 sales follow-ups from the same number pool, the platform handles both without forcing you to buy two tools. Bulk send with personalization tokens works well, keyword auto-responders are easy to configure, and the contact list management is solid. Pricing scales from $39/mo for 500 credits up to $899/mo for 50K credits. Where it falls short: deep CRM workflow triggers, sequence-style multi-step automation, and the dedicated sales texting UX that purpose-built tools offer.
- Handles both bulk marketing SMS and 1:1 sales texting
- Keyword auto-responders are easy to set up
- Predictable per-credit pricing with clear volume tiers
- Lighter CRM integration depth than sales-first tools
- Sequence-style automation lags Salesmsg and Outreach
- UX feels marketing-led, not sales-rep-led
If your team is on Outreach, the SMS module is almost certainly the right answer. It sits inside the same sequence builder you already use, fires as a step alongside email and call tasks, and rolls up to the same dashboards reps and managers look at every day. No second tool to learn, no separate inbox to monitor, no integration to maintain. The trade-off is feature depth: the SMS UX is thinner than Salesmsg or Heymarket, and you don't get a shared team inbox in the same way. But for sequence-driven SDR motions, having SMS as a native step beats almost any standalone tool on workflow alone.
- SMS lives inside your existing Outreach sequences
- Reporting rolls up to the same dashboards reps already use
- No second tool to onboard, learn, or pay for separately
- SMS UX is thinner than purpose-built tools
- No shared team inbox for collaboration on threads
- Pricing requires a sales conversation, not transparent on the site
Salesloft's native texting module is the mirror image of Outreach's: if you're already on Salesloft, this is the path of least resistance. SMS steps slot into your cadences, the conversation view lives next to email and dialer activity, and the integration with Salesforce is already there. Reports roll up cleanly. The same trade-offs apply: feature depth on the SMS-specific UX trails dedicated tools, and the texting experience favors workflow integration over standalone sophistication. For teams that already pay for Salesloft, the math almost always favors adding the SMS module over standing up a second platform.
- SMS steps slot into existing Salesloft cadences
- Conversation activity lives next to email and call data
- Salesforce sync handled through existing Salesloft integration
- SMS UX is functional but trails dedicated tools
- No shared team inbox view comparable to Heymarket
- Pricing is opaque, requires a sales call to scope
When to Add SMS to Your Outbound Sequence
The single biggest mistake SDRs make with SMS is treating it like a cold-email replacement. Cold-blasting a list of mobile numbers you pulled from a data provider is a TCPA risk, a deliverability disaster, and a way to get your sending number flagged by carriers within days. SMS works when it's the third or fourth touch on a prospect who has already engaged.
A reasonable B2B cadence looks something like this. Day 1: personalized cold email with a specific business reason. Day 3: LinkedIn connection request with a one-line note. Day 5: follow-up email referencing whatever they opened or clicked. Day 7: phone call. Day 9: SMS, only if you have a verified mobile number and the prospect has shown at least one engagement signal (opened email three times, accepted LinkedIn, replied with "circle back later," booked and no-showed a meeting). The SMS reads as a polite check-in, includes opt-out language, and runs during business hours in the prospect's timezone.
For warmed prospects (someone who replied positively, booked a meeting that got rescheduled, or downloaded a piece of gated content with a real mobile number), SMS pulls 25-45% reply rates in my experience. That's the lift everyone talks about. It vanishes the moment you point SMS at cold lists, and so does your sending reputation.
Keep messages under 160 characters where possible to stay in a single segment. Include your name, your company, and the reason for the text. Always include an opt-out instruction ("reply STOP to opt out") on the first SMS to any new contact, even if the platform handles it automatically. Run sends between 9am and 6pm local time. Skip weekends unless the prospect has opted into business hours.
SMS Compliance Basics for B2B
The TCPA covers any commercial text message to a mobile number in the US. Yes, even B2B. Yes, even if the contact is a "business contact." The Telephone Consumer Protection Act predates the B2B versus B2C distinction many SDRs assume protects them, and the FCC has been clear that mobile numbers carry consent requirements regardless of who answers them.
Consent comes in two flavors. Express consent is the gold standard: the prospect typed their mobile number into a form, agreed to receive texts, and you have a record of it. Implied consent is the gray zone: the prospect gave you their mobile number in a business context (exchanged business cards, replied to your email with their cell, booked a meeting and entered a mobile). Most B2B SMS sits in the implied-consent bucket. That's defensible for one-to-one sales follow-up, much less defensible for broadcast or sequence-style sends.
Opt-out mechanics are non-negotiable. STOP, UNSUBSCRIBE, CANCEL, END, and QUIT must all trigger immediate suppression. Every reputable SMS platform handles this automatically. Don't override it. Re-texting a contact who opted out is the fastest way to land a TCPA complaint, which can hit $500-$1,500 per message in statutory damages.
A2P 10DLC registration is required for any commercial SMS on a US 10-digit number. Brand registration costs $4-$44, campaign registration runs $10-$50/mo per campaign, and the approval cycle takes 2-4 weeks. Without registration, throughput is throttled to a trickle and many messages get filtered before delivery. Every tool on this list walks you through it during onboarding. Skipping it is not an option for a real SDR motion.
Frequently Asked Questions
Is cold SMS to B2B prospects legal under TCPA?
Texting a business contact you have no prior relationship with on a mobile number carries TCPA risk regardless of B2B versus B2C status. The safe path: SMS only after a prospect has engaged (replied to an email, booked a demo, accepted a connection). Treat SMS as a follow-up channel for warmed prospects, not a top-of-funnel blast tool. Brand registration via A2P 10DLC is required for any commercial SMS volume in the US.
When should I send the first SMS in an outbound sequence?
After an engagement signal. A prospect opens your email three times, clicks a link, accepts a LinkedIn connection, replies and ghosts, or books a meeting and no-shows. That's when SMS earns a 30-50 percent reply rate instead of a spam complaint. Cold SMS to a never-engaged prospect rarely beats a well-targeted cold email and creates compliance exposure.
What response rates can SDRs expect from SMS?
Reply rates on warmed SMS hit 20-45 percent in practice, roughly 2x to 5x what the same prospect would do over email. Cold SMS to never-opted-in contacts drops to single digits and burns trust. The lift only shows up when SMS is layered on top of an email or LinkedIn touch the prospect already engaged with.
Do I need A2P 10DLC registration to send SMS for sales?
Yes. US carriers require A2P 10DLC brand and campaign registration for any commercial messaging on local 10-digit numbers. Without it, throughput is capped at a trickle and many messages get filtered before delivery. Most SMS platforms walk you through registration during onboarding. Expect a 2-4 week approval cycle and small monthly fees per campaign.
Salesmsg vs Heymarket: which one for a 5-person SDR team?
Salesmsg if your team lives in Salesforce or HubSpot and you want SMS sequences that fire from CRM workflows. Heymarket if AEs and SDRs need shared inboxes and conversation visibility across the team. Salesmsg wins on CRM-native automation. Heymarket wins on team collaboration UI and MMS support.
Is Smarter Contact appropriate for B2B SaaS SDRs?
Probably not. Smarter Contact is built for high-volume outbound in real estate, mortgage, solar, debt relief, and insurance lead-gen. The platform handles tens of thousands of messages per month with skip tracing and ringless voicemail baked in. If your ICP is CTOs at mid-market SaaS companies, the volume and feature set are overkill and the consumer-outbound positioning does not match a B2B SaaS workflow.
What's the difference between Outreach SMS and a standalone SMS tool?
Outreach SMS is a step type inside an existing Outreach sequence. The message fires automatically based on sequence logic, lives next to your email and call steps, and reports up to the same dashboards. Standalone tools like Salesmsg give you a richer texting UX, shared inboxes, and dedicated number management, but require a separate workflow outside your sequence tool.
Can I send SMS to mobile numbers I scraped from a data provider?
Legally risky. TCPA applies to any commercial text to a mobile number without prior express consent. Scraped or purchased mobile lists do not carry that consent. Carrier filtering will also flag high-volume sends to cold lists and throttle or block your traffic. Use SMS for prospects who have raised their hand, not for cold lists from a contact database.
How much does SMS outreach cost per message in practice?
Plan on $0.01 to $0.03 per outbound SMS segment in the US, plus a monthly platform fee ranging from $25 to $200 for SDR-grade volume. MMS runs 3-5x more. Toll-free or short codes cost extra. A reasonable SDR doing 500 SMS touches a month lands around $50-$100 all-in once you include the platform subscription.
Does SMS work better than LinkedIn DMs for follow-up?
Different mechanics. LinkedIn DMs feel less intrusive and don't carry TCPA risk, but they require the prospect to log into LinkedIn to see them. SMS has near-100 percent open rates within 5 minutes, but only works if you have a verified mobile number and an engagement signal. Use LinkedIn for the second touch, SMS for the fifth touch on prospects who keep engaging without committing.