The Top SMS Marketing Agencies in 2026

SMS is no longer just for flash sales or shipping updates. For many ecommerce brands, it has become one of the strongest revenue channels available. When it is done properly, the conversion rates often outperform email and paid social.

And that’s the challenge.

Plenty of agencies claim they offer SMS. But in reality, most treat it like a broadcast channel, pushing generic text messages and discount codes without a clear strategy behind each send. This approach does not foster sustainable for the growth of the brand.

This guide breaks down the best SMS marketing agencies in 2026 based on strategic depth, execution quality, and their ability to drive results across the entire customer lifecycle.

If you are looking for a klaviyo partner who understands more than just sending text messages and knows how to turn SMS into measurable profit, you are in the right place.

Need more than just SMS? Many of the top agencies on this list also offer full-funnel services, including email marketing, so you’re not stuck managing siloed strategies.

How We Ranked These SMS Marketing Agencies

We didn’t evaluate agencies based on whether they simply offered SMS. Instead, we looked at how effectively they treated it as part of a revenue strategy. What separated the strongest agencies from the rest came down to a few consistent factors:

• SMS was treated as a revenue channel, not just an add-on to occasional campaigns or promotions
• Lifecycle coverage: opt-in, welcome, post-purchase, replenishment, winback
• Multi-channel integration: especially with email and owned media
• Real results: case studies, reviews, and platform partnerships (like Klaviyo)
• Positioning and transparency were clear, with visible pricing signals and an identifiable team structure

1. Stimulate

Best for: Full customer lifecycle SMS + high-performing creative & segmentation

Country: United States

Employee Count: ~10–15

Pricing Estimate: Starting at $3,500/month

Notable Clients: Speks, ezpz, Nursing Queen, StackedSkincare

Why choose this agency:

Stimulate is a full service SMS marketing agency and retention-first partner for eCommerce brands looking to scale profitably—not just push more messages. With a strategic focus on customer lifecycle, they build SMS systems that grow your list, convert new buyers, and bring customers back again and again.

Their team knows how to write persuasive texts that convert, using punchy copy, revenue-focused testing, and segmentation that ties directly to customer behavior. It’s creative that drives action, not just engagement.

Bonus: Stimulate doesn’t stop at SMS. Their full-service capabilities include email marketing, so your retention strategy feels cohesive across every touchpoint.

2. Flowium

Best for: Dedicated SMS program build + lifecycle automation (Klaviyo-first)

Country: United States

Employee Count: ~11–50

Pricing Estimate: Starting at $5,000/month (est.)

Notable Clients: RSVLTS, Alen, WiperTech

Why choose this agency:

Flowium leans heavily into systems. They shine when you need to build a structured, data-driven SMS strategy from scratch—especially on Klaviyo. Their documentation and case studies reflect a clear, technical approach to automation, ideal for brands ready to invest in SMS as a core retention lever.

3. Fuel Made

Best for: High-end creative + CRO + "brand feel" SMS/email programs

Country: United States

Employee Count: Not listed

Pricing Estimate: $150–$199/hr (est.)

Notable Clients: Beardbrand, Umbra, Peepers, Velour Lashes

Why choose this agency:

Fuel Made is the go-to for premium brands that care about aesthetic and tone. Their SMS work is tightly aligned with CRO strategy and conversion storytelling. If your brand lives on Shopify and your average order value is $100+, they know how to create campaigns that match the look, feel, and voice of your store.

4. Chronos Agency

Best for: Scale-stage lifecycle marketing (Email + SMS + push)

Country: Singapore

Employee Count: ~80+

Pricing Estimate: ~$5k–$7k+/month (est.)

Notable Clients: Feminera (plus other vertical-based case studies)

Why choose this agency:

Chronos is one of the largest lifecycle-focused agencies on this list, with a global footprint and strong operational capacity. If you’re scaling fast and want a larger partner that can manage multiple channels and international audiences, they’re a strong fit.

5. Hawke Media

Best for: Full outsourced marketing where SMS is one channel among many

Country: United States

Employee Count: 50–249+

Pricing Estimate: $6k–$10k+/month (est.)

Notable Clients: Verizon, Red Bull, HP, Evite

Why choose this agency:

Hawke is massive compared to most specialist firms. They work well for brands that want to outsource everything—not just retention. SMS is one slice of their offering, so if you’re looking for integrated paid + owned strategies, they can cover more ground.

6. Avenue Z

Best for: Influencer/PR-driven growth with SMS as part of a broader comms engine

Country: United States

Employee Count: 50–249

Pricing Estimate: $7-10k+/month (est.)

Notable Clients: CPAP.com, Dave

Why choose this agency:

Avenue Z blends media, PR, and performance marketing—which gives them a unique angle on SMS. If your strategy leans heavily into influencers, content, or earned media, and you want SMS to amplify that, they’re worth a look.

7. Andzen

Best for: APAC-focused lifecycle + SMS + loyalty builds

Country: Australia

Employee Count: Not listed

Pricing Estimate: ~$5k–$10k+/month (est.)

Notable Clients: Hard Yakka, Tropeaka, SABO SKIRT, Moana Bikini

Why choose this agency:

Andzen is ideal if your brand operates in the APAC region or has global needs. Their strength lies in structured CRM builds that incorporate SMS, loyalty, and email into one cohesive system.

8. Mattered

Best for: Premium creative + strategy with strong SMS performance claims

Country: United States

Employee Count: 10–49

Pricing Estimate: $5k–$10k+/month (est.)

Notable Clients: YETI, Burton, Cos Bar, ASRV

Why choose this agency:

Mattered delivers top-tier design and conversion copy for SMS and email. Their case studies tout serious returns (ASRV saw 74x ROI), and their creative is dialed in for direct response.

9. 11 Agency

Best for: Growth-stage eComm brands needing full-service email + SMS

Country: United States

Employee Count: 2–9

Pricing Estimate: ~$3k–$6k/month (est.)

Notable Clients: Teespring, The Pretzel Company

Why choose this agency:

Small but scrappy, 11 Agency brings a performance-first lens to email and SMS. They’re well-suited for DTC brands that want hands-on attention and a direct line to their strategist.

10. FlowCandy

Best for: Fast-moving SMS + email execution at scale

Country: United States

Employee Count: 2–9

Pricing Estimate: $2k–$8k/month (est.)

Notable Clients: Insurify, Coterie, Baobab, Brewsy

Why choose this agency:

FlowCandy is a volume shop. If you need consistent campaigns, solid automations, and a no-frills, high-output team, they’re efficient and straightforward to work with.

How to Choose the Right SMS Marketing Agency

Not every agency will be the right fit for your brand. Here’s how to narrow it down:

When you should hire a SMS-first retention agency:

• You have a growing list but aren’t seeing results
• You need advanced flows (not just promos)
• You want to connect SMS to LTV, not just clicks

When a full-service agency makes sense:

• You need help across paid + owned channels
• You prefer fewer vendors and one integrated team
• Your business is shifting into a new stage of scale

Questions to ask before signing:

• Who owns SMS strategy vs. execution?
• How do they measure incremental SMS revenue?
• How do they prevent list fatigue and churn?
• Which platforms do they specialize in?

Final Takeaway

There are a lot of agencies out there offering SMS marketing. But very few treat it as a long-term revenue engine. The best partners understand:

• Timing matters
• Segmentation is everything
• Copy has to convert
• And SMS should improve your customer experience, not just interrupt it

If you’re evaluating SMS marketing agencies and want a retention-first approach, start with partners who treat SMS as a profit channel, not just another send button.