The 10 Best SMS Marketing Agencies in 2026

Last updated: August 19, 2026 · By Melanie Balke, Founder & CEO, The Email Marketers

The best SMS marketing agency for most 7 and 8-figure ecommerce brands runs SMS inside a retention program rather than as a standalone channel, holds a real partner relationship with the platform you send on, can prove it understands 10DLC registration and the April 2025 revocation rules, and will tell you the honest number: SMS should be about 20% of your email-plus-SMS revenue, not 50%. Ten agencies clear that bar in 2026. This guide scores all ten on a published 100-point rubric, including us, The Email Marketers, at #1. It also publishes our first-party SMS benchmarks, the compliance rules that changed in the last eighteen months, and five verified facts about agencies here that are still being copied incorrectly across the internet.

Key Takeaways

• SMS should be roughly 20% of your email-plus-SMS revenue. Brands that make SMS carry equal weight usually just burn the list.
• Expect $1,500 to $18,000+ per month, almost always inside a combined email and SMS retainer. We start at $4,400/mo and average $6,500/mo.
• The compliance rules moved and most listicles have them wrong. One-to-one consent was vacated in January 2025. What binds you is the April 11, 2025 revocation rule plus 10DLC, hard-blocked by carriers since February 1, 2025.
• The platform layer shifted. Yotpo exited email and SMS and decommissioned SMSBump on December 31, 2025, and Postscript now sells its own managed service competing with the agencies here.
• Two agencies here were acquired in the past year: Underground Ecom by supergroup, Homestead Studio by Verndale in March 2026. Neither shows up in most rankings for this term.
• Full disclosure: we wrote this guide and appear at #1. The rubric is published below with every score.

What Should a Well-Run SMS Program Look Like in 2026? Our Benchmarks

Almost nobody publishes real SMS numbers, and the ones that circulate come from vendor marketing pages. Here are ours, plus the two third-party datasets I trust.

Email to SMS revenue split: about 80/20. This is the number brands argue with most. In mature accounts we run, email carries roughly 80% of combined email-plus-SMS revenue and SMS carries roughly 20%. The failure mode is predictable: a brand gets excited, doubles send volume to chase the email numbers, and six weeks later the opt-out rate has eaten a list they spent a year building. You cannot rebuild an SMS list the way you rebuild an email list.

The takeaway: if an agency tells you SMS can be 40% of your program, ask to see the opt-out curve underneath that claim.

What good looks like per message. Postscript benchmarked more than 17,000 Shopify stores for January 1 to December 15, 2025. Median revenue per message: about $0.98. The 75th percentile: $2.13. The 90th: $4.54. Median cadence: about 1.91 messages per subscriber per month. Klaviyo, drawing on more than 183,000 customers, reports SMS flows generate roughly 8x the revenue per recipient of SMS campaigns.

Flows are where SMS money lives. Campaign blasts are where SMS lists go to die. A median program sending under two messages a month at a dollar a message is not lacking ambition. It is correctly restrained.

Our email benchmarks, for context: 60 to 65% open rates on well-segmented campaigns (Apple auto-opens inflate this, so treat opens as a health signal, not a success metric), 0.7 to 1.3% click rates after bot-click filtering, roughly 70/30 campaigns to flows in mature accounts, 12 to 30 campaigns per month for 7 and 8-figure brands, and 6%+ popup signup rates on Alia versus about 3% standard. That popup number matters more for SMS than for email, because your popup is where most of your SMS list is born. Clients arrive at about 15% email and SMS revenue share and should clear 25% by month 6.

The takeaway: grade any agency, us included, against these numbers.

The 2026 SMS Compliance Rules Most of These Lists Get Wrong

This separates an agency that runs SMS from one that resells it. SMS is the only retention channel with statutory damages attached, and the rules moved twice in eighteen months.

One-to-one consent is dead. Stop citing it. The FCC rule requiring separate consent for each individual seller was vacated by the Eleventh Circuit on January 24, 2025 in Insurance Marketing Coalition v. FCC, three days before it took effect, and formally removed in September 2025. If a vendor is still selling you a compliance product built around it, they stopped reading in 2024.

The rule that does bind you took effect April 11, 2025. Consumers may revoke consent by any reasonable method. Stop, quit, end, revoke, opt out, cancel, and unsubscribe are all valid, so you cannot require that a subscriber type STOP and only STOP. Revocation must be honored within 10 business days, and you may not designate an exclusive means of revocation. The cross-channel "revoke-all" piece has been delayed twice, most recently to January 31, 2027. Not in force today. It will be.

10DLC is the one that actually stops your revenue. Since February 1, 2025, AT&T, T-Mobile, and Verizon block unregistered A2P 10DLC traffic outright. Not throttled, not filtered to spam. Not delivered. Registration runs through The Campaign Registry, vetting takes up to 10 business days, and cannabis, firearms, gambling, and payday lending are auto-rejected categories. That matters enormously if you sell CBD or THC, a category we serve: your carrier registration is the choke point, not your creative.

Three questions that expose an agency on a sales call: Who registers my 10DLC campaign, and what happens if it is rejected? Which opt-out keywords beyond STOP are you honoring, and where is that configured? What is your plan for the revoke-all provision landing January 31, 2027? An agency that answers all three cleanly has run SMS. One that says "the platform handles it" has not.

How We Scored the Agencies (Check Our Work)

Every ranking for this keyword was written by an agency, and most place themselves first without saying so. We are on this list too, so here is the exact 100-point rubric. Re-weight it and your #1 changes.

1. Verifiable SMS-specific results, 30 points. Named clients and public case studies with SMS numbers shown separately from email. A "$400M generated" banner with no attribution detail scores zero.
2. Platform depth, 20 points. Working depth across Klaviyo SMS, Attentive, Postscript, and where relevant MMS, RCS, and WhatsApp, verified against each platform's own directory rather than the agency's badge page.
3. Who actually works your account, 20 points. Senior, accountable, meetable teams score high. Junior or anonymous delivery scores low no matter how good the sales call was.
4. Compliance and deliverability rigor, 15 points. SMS carries statutory damages email does not. This category does not exist on an email-only rubric, and it is why this list is not our Klaviyo list reordered.
5. Pricing transparency, 10 points. Published rates or honest minimums beat "book a call to find out."
6. Verified current status, 5 points. Checked live on August 19, 2026 against each agency's own site, Clutch, and the relevant partner directories. Lists get copied from lists. We looked, and two of these had been acquired since anyone last updated a ranking for this term.

Our scores, so you can argue with them: The Email Marketers 90, Chronos Agency 82, Magnet Monster 79, Sticky Digital 77, Underground Ecom 75, Flowium 74, Andzen 72, Hustler Marketing 70, Homestead Studio 66, InboxArmy 63.

Where we lose points: we run three SMS platforms well where InboxArmy touches forty-plus and Chronos eleven, so we do not top platform depth. And SMS is deliberately about 20% of what we run. If you want an SMS-only vendor, we are not it, and I would rather say that here than on a sales call.

The 10 Best SMS Marketing Agencies, Compared

#	Agency	Score	Best for	SMS platforms	Starting price	HQ
1	The Email Marketers	90	8-figure DTC brands wanting SMS run inside a senior-led retention program	Klaviyo SMS, Attentive, Postscript	$4,400/mo (avg $6,500)	Los Angeles, CA
2	Chronos Agency	82	Brands wanting SMS, push, WhatsApp, and RCS from one team	Klaviyo, Attentive, Postscript, Braze + 7 more	Unpublished ($10K+ min on Clutch)	Singapore
3	Magnet Monster	79	Brands wanting one flat fee across SMS, WhatsApp, email, and direct mail	Klaviyo SMS, WhatsApp	Flat monthly fee, unpublished	Sale, Cheshire, UK
4	Sticky Digital	77	Beauty, wellness, F&B, and subscription brands wanting a boutique	Attentive, Postscript, Klaviyo SMS	Unpublished	San Diego, CA
5	Underground Ecom	75	Enterprise UK and EU brands wanting SMS and WhatsApp at scale	Klaviyo SMS, WhatsApp	Unpublished	London, UK
6	Flowium	74	Growth-stage brands wanting a systematized multi-channel engagement	Klaviyo SMS, MMS, RCS, WhatsApp, push	Unpublished	Staten Island, NY
7	Andzen	72	APAC and European brands wanting journey-first lifecycle design	Klaviyo SMS, MMS, RCS, WhatsApp, push	Unpublished	Sydney, AU
8	Hustler Marketing	70	Value-conscious brands wanting big-agency output from a remote pod	Klaviyo SMS	~$5,000 min project	Fully remote
9	Homestead Studio	66	Brands wanting SMS coordinated with paid acquisition	Klaviyo SMS	$5,000+ projects, $200-300/hr	Wisconsin
10	InboxArmy	63	Budget-conscious brands, or teams running SMS across several platforms	40+ platforms	~$1,500/mo	Grapevine, TX

All facts verified live on August 19, 2026. Where an agency publishes no pricing, we say "unpublished" rather than repeating a number from a third-party listicle.

1. The Email Marketers: Best for 8-Figure DTC Brands That Want SMS Run Inside a Senior-Led Retention Program

Bottom line: The Email Marketers is a Los Angeles retention marketing agency that runs SMS through Klaviyo SMS, Attentive, and Postscript alongside email, direct mail, subscriptions, and referral and loyalty programs, staffing every account exclusively with senior specialists.

We generated more than $103 million in attributed client revenue in 2025. We only hire people who have done this before, so there is no junior learning on your account, ever. Grüns, Gimme Seaweed, Elevate Outdoor Collective (the company behind K2 Skis and Völkl), Open Store, and Outer Furniture have worked with us.

Ranking ourselves first while saying SMS should only be 20% of your program is one claim, not two. SMS underperforms for one of two reasons: it is bolted on by a vendor who cannot see the email calendar, so the same customer gets hit twice in a day with the same offer, or it is over-sent by someone whose incentive is message volume. Both channels on one calendar, one strategist accountable for the combined number, is the fix.

Verified results (case studies public on our site):

• The Freeze Pipe grew attributed email revenue 113% to $894,661 in five months. (Case study)
• Llama Naturals went from $8,527 to $79,733 in monthly email revenue in under 60 days.
• Gimme Seaweed lifted flow revenue share from 46.6% to 67.3%. (Case study)
• V-Flat World grew combined email and SMS revenue to $111,364, up 18.4% year over year in one quarter. (Case study)

Pricing: starts at $4,400/month, averages $6,500/month, runs to $18,000/month. Premium on purpose: it is what an all-senior, US-led, five-specialist team costs. Full rate card in our pricing breakdown.

Honest fit-notes: we do not run paid acquisition, by design, and I turn down business we cannot wow. Brands under $1M in revenue should not hire us, or frankly any agency on this list. At that size a retainer eats the ROI before it produces any. Look at our Retention Lab, a good freelancer, or InboxArmy at #10, and revisit agencies at $3M to $5M+. If you want a pure SMS vendor with no email mandate, we are the wrong shape.

2. Chronos Agency: Best for Brands That Want SMS, Push, WhatsApp, and RCS From One Team

Bottom line: Chronos is a Singapore-headquartered retention agency of roughly 80 specialists, founded July 2017 by Joshua Chin, working across eleven messaging platforms including Klaviyo, Attentive, Postscript, and Braze, Klaviyo Master Elite since March 2022.

Chronos has the widest channel surface here: email, SMS, push, WhatsApp, RCS, direct mail, and paid media, with a second office in Sydney. Its review base is the deepest on this list at 58 Clutch reviews, 4.8, most recent March 2026, and Clutch's breakdown puts SMS at 10% of its mix, roughly what we would expect from anyone running SMS honestly.

Pricing: none published; /pricing returns a 404. Clutch lists a $10,000+ minimum project at $100 to $149/hour.

Honest fit-notes: two numbers on Chronos's own site contradict each other. The homepage claims $400M+ in attributable revenue, the about page $329M+, and the homepage claims 4.9 on Clutch when the live profile reads 4.8. Not disqualifying, but if a brand is going to grade you on measurement rigor, keep your own scoreboard consistent. Delivery is globally distributed with centers in the Philippines and Malaysia, and the agency states client teams work US hours for US brands. Ask who your strategist is and what hours they overlap with yours, of everyone here, us included.

3. Magnet Monster: Best for Brands That Want One Flat Fee Across SMS, WhatsApp, Email, and Direct Mail

Bottom line: Magnet Monster is a UK retention agency founded around 2018 by Adam Kitchen, operating from Sale in Cheshire, charging one flat monthly fee for unlimited sends across email, SMS, WhatsApp, and direct mail, and holding Klaviyo Elite partner status.

On SMS specifically, that model inverts the usual incentive. Most SMS pricing scales with volume somewhere in the chain, which quietly rewards sending more. A flat all-channel fee does not. Kitchen's public teaching on LinkedIn and podcasts gives unusual visibility into how the agency thinks, and they claim 300+ ecommerce brands across seven years.

Pricing: flat monthly fee, amount unpublished. /pricing returns a 404.

Honest fit-notes: flat-fee "unlimited" models in practice mean a defined delivery cadence rather than unbounded bespoke work, so ask what that cadence is before signing. Team size is not published anywhere; boutique and intentionally small is a real answer but not a verifiable one. Office locations conflict between their own footer and the Klaviyo directory, and the team is UK-centered, which US brands should factor into meeting rhythms.

4. Sticky Digital: Best for Beauty, Wellness, F&B, and Subscription Brands That Want a Boutique

Bottom line: Sticky Digital is a female-founded, fully remote San Diego retention agency led by co-founders Nikki Tooman (CEO) and Mariel Kilroy (COO), around 11 to 50 people, running Attentive, Postscript, and Klaviyo SMS for DTC brands with predominantly female customer bases.

Outside our own entry, this is the only agency here working across all three SMS stacks that matter for ecommerce, which earns its platform-depth score despite its size. The vertical focus is the point: beauty, wellness, food and beverage, apparel, subscription, with 50+ brands claimed from $1M to $50M+.

Pricing: none published anywhere.

Honest fit-notes: a hard verification note first. Their site is stickydigital.io. The .com is an unrelated web-design shop in Florida, and I would bet money some rankings for this keyword are describing the wrong company. They also have no Clutch profile, so the third-party review signal anchoring most of this list is absent, their "#1 Retention Marketing Agency in North America" claim still says 2023 and 2024, and their founding year is contradictory across sources, so I am not printing one. Small team means limited capacity, and brands outside their verticals lose the pattern-matching advantage that makes them effective.

5. Underground Ecom: Best for Enterprise UK and EU Brands Wanting SMS and WhatsApp at Scale

Bottom line: Underground Ecom is a London retention agency of 120+ people, Klaviyo Master Elite and Klaviyo's 2025 EMEA Agency Partner of the Year, with enterprise clients including AG1, Surreal, and Osprey, and dedicated SMS and WhatsApp management as a named service line.

For enterprise messaging muscle in the UK and Europe, nobody here matches the bench: layered account support against a claimed $165M in trackable sales. WhatsApp management is a genuine differentiator for European brands, where WhatsApp does the work SMS does in the US.

Pricing: none published, consultation-gated.

Honest fit-notes: three things a recycled description will not tell you, all verified this week. Underground Ecom was acquired by supergroup in a 100% deal, and co-founder James Matthewman moved up to run supergroup. Their Clutch profile is stale to the point of being misleading (zero reviews, a 10-to-49 employee bracket, an old Reading address rather than the London office), so do not source anything from it.

6. Flowium: Best for Growth-Stage Brands That Want a Systematized Multi-Channel Engagement

Bottom line: Flowium is a Klaviyo Master Elite agency founded February 2017 by Andriy Boychuk, headquartered in Staten Island, delivering through six-person dedicated pods across email, SMS, MMS, RCS, WhatsApp, mobile push, Instagram DM automation, and direct mail.

The channel list is the news. Flowium has quietly expanded past email and SMS into RCS and Instagram DM automation, which puts it ahead of most of this list on where messaging is heading. The core strength remains systemization: audits, flow builds, and campaign calendars follow strict repeatable processes. They carry 23 Clutch reviews at 4.9 and an unusual two-year price-lock guarantee.

Pricing: no published rates. Third-party estimates vary by a factor of seven depending on which listicle you read, which tells you how little anyone actually knows.

Honest fit-notes: brands wanting a systematized engagement will be happy; brands wanting bespoke strategy will find the templatized process constraining. The team is globally distributed and a minority of reviews mention timezone friction. Small credibility note: their contact page displays a Clutch 5.0 while the actual profile reads 4.9. Round in your own favor often enough and people stop checking your other numbers.

7. Andzen: Best for APAC and European Brands That Want Journey-First Lifecycle Design

Bottom line: Andzen is an Australian lifecycle agency founded in 2012, led by CEO Brenden Rawson and CRO Jason Anderson, the first Klaviyo Elite Master partner in APAC and fifth globally, running SMS, MMS, RCS, WhatsApp, and mobile push alongside email.

Andzen has the longest track record of any specialist here, took Klaviyo's APAC Agency Partner of the Year for 2025, and holds team members across Germany, the US, the UK, Spain, and Canada. Its journey-mapping methodology is genuinely different from calendar-and-flows agencies.

Pricing: none published, and no minimum on the Klaviyo directory either.

Honest fit-notes: a catch worth repeating loudly, because it will be wrong in half the rankings you read. andzen.com is not theirs. It 301-redirects to Cendix, a web-to-print software company in Oregon. The agency is at andzen.co. Beyond that, no Clutch profile exists, so there is no aggregated review signal, and the core team works Australian hours. Fine for APAC and European brands, a real constraint for US-only teams.

8. Hustler Marketing: Best for Value-Conscious Brands That Want Big-Agency Output From a Remote Pod

Bottom line: Hustler Marketing is a fully remote email and SMS agency founded by Bostjan Belingar with 60+ people across 24 countries, delivering through four-person pods with account managers capped at three clients each, claiming 400+ brands served and $105M generated for clients in 2024.

A global remote bench keeps prices competitive while the pod cap protects attention. The stat I would actually want from any agency is one they publish: 65% of clients stay two years or more. Clutch reviewers (17 reviews, 5.0) praise output comparable to larger agencies at competitive prices.

Pricing: not published. Clutch lists a $5,000+ minimum with most projects at $10,000 to $49,999.

Honest fit-notes: SMS is real here but secondary to email, and there is no SMS-specific case study with the channel broken out, which is exactly what this rubric penalizes. Their Wyoming address is administrative rather than a working office, and their site names no founder, which for an agency whose founder is genuinely visible in the industry is a strange omission.

9. Homestead Studio: Best for Brands That Want SMS Coordinated With Paid Acquisition

Bottom line: Homestead Studio is a Wisconsin full-funnel agency led by CEO Riley Trotter, Klaviyo Master Elite and Klaviyo's 2025 Americas Agency Partner of the Year, splitting work roughly evenly across email, SMS, paid media, CRO, and web design, and it joined Verndale in March 2026.

If you want one agency accountable for both acquisition and retention economics, Homestead is the strongest option here, and the coordination case is real: the brands that over-send SMS are usually the ones whose paid team and retention team never talk.

Pricing: $5,000+ project minimum at $200 to $300 per hour, the highest hourly band here.

Honest fit-notes: two corrections to the record. Their branding is "Homestead Has Joined Verndale," announced March 12, 2026, not the "A Verndale Company" phrasing in earlier writeups including one of ours. And their Clutch profile carries zero reviews and no rating. Acquisitions bring integration churn, so ask how the email and SMS practice is staffed today versus a year ago. One small tell: as of this week the live homepage still has Lorem ipsum placeholder text in its entire Process section. That is a site nobody is minding.

10. InboxArmy: Best for Budget-Conscious Brands, or Teams Running SMS Across Several Platforms

Bottom line: InboxArmy is a Grapevine, Texas production agency founded in 2016 with 120+ specialists supporting 40+ platforms, running SMS and push as named service lines alongside email, with managed services from $1,500/month and a 4.9 rating across 71 Clutch reviews.

For template production, campaign execution at volume, or brands mid-migration between platforms, InboxArmy's price-to-output ratio is unmatched here. They also run a white-label arm for other agencies, which tells you the core competence: throughput. That $1,500/month floor is published on their own site, earning pricing-transparency points several agencies above them lose.

Honest fit-notes: InboxArmy is not an SMS specialist. SMS is one line in a very broad catalog and their Klaviyo tier is the lowest of anyone here. You are buying production capacity, not retention strategy. Both are valid purchases; know which one you need. Also worth flagging: the audit and per-template prices that circulate for InboxArmy are not on their own site, and at least one traces back to a direct competitor's blog.

Also Considered, and Why They Are Not in the Ten

• Fuel Made: ~20 people, all-senior, all-US, Shopify-exclusive Seattle, Klaviyo Master Elite, 28 Clutch reviews at 5.0, and one of very few here publishing real pricing: email and SMS from $6,900/month. They do run SMS, contrary to how they are usually described. Out only because SMS is a small slice of a development-led business.
• One 10 Media: boutique Ohio agency founded 2018 by Mike Gleba, Klaviyo Master Platinum and a certified Postscript partner, 4.9 across 29 Clutch reviews. Out because SMS is not broken out in their mix. Their site says Medina, OH, not the Akron address in stale directories.
• MH Digital (mhdigitalgroup.com): a Denver lifecycle consultancy with real Braze and Klaviyo depth, 24 Clutch reviews at 5.0, pilots from $2,000/month. Out because their own Clutch breakdown is 90% email, 10% SMS.
• Groove Commerce: Baltimore, founded 2007, now Klaviyo Elite Master, published pricing at $5,550/month. Out on team size and an unclaimed Clutch profile with zero reviews.
• Recart keeps appearing on "SMS agency" lists and is not an agency. It is a Shopify SMS platform with a bundled managed service at $299 to $999 per month, which beats any agency retainer under a thousand a month.

What Does an SMS Marketing Agency Cost in 2026?

Between $1,500 and $18,000+ per month, and in almost every case SMS is priced inside a combined email-and-SMS retainer rather than standalone. That is not agencies being cagey. Separating them produces worse work.

Platforms with a bundled managed service run roughly $300 to $1,000/month plus message costs, the honest floor for a brand not ready for an agency. Production shops start at $1,500/month, boutique specialists around $4,000, and full-service retention agencies typically land at $2,500 to $10,000, though seven of the ten above publish no pricing at all. We start at $4,400/month, average $6,500/month, and run to $18,000/month.

Then add message costs, which are not the agency's fee: carrier surcharges of roughly $0.003 to $0.005 per registered segment, your platform's per-message rate, and 10DLC registration. At a median of about $0.98 revenue per message, those are not rounding errors.

The takeaway on the money math: a brand doing $10M with a healthy program should expect email and SMS combined at 25%+ of total revenue, so $2.5M+, with roughly $500K of that from SMS at the 80/20 split. Against a $6,500/month retainer, that is $78,000 a year in fees against $500,000 in SMS revenue alone. If the SMS side is not clearing several times the retainer on its own, the split is wrong, the cadence is wrong, or the flows are not built.

For what sits inside a retainer, see our pricing guide and what a retention retainer includes. For the broader hiring decision, start with our 12 best email marketing agencies, the Klaviyo agency guide, or the best ecommerce email marketing agencies. For tactics, our SMS marketing guide and SMS best practices cover it.

What Should You Do Next?

If you run a 7 or 8-figure ecommerce brand and email plus SMS drive less than 25% of your revenue, the fastest next step is a teardown of your current account. Book a 30-minute audit with our CEO, Melanie Balke. You get a personalized retention roadmap whether or not we ever work together.

Frequently Asked Questions

How much does an SMS marketing agency cost per month?

Between $1,500 and $18,000+ per month in 2026, almost always priced inside a combined email and SMS retainer rather than sold standalone. InboxArmy publishes managed services from $1,500/month, Stimulate from $4,000, Groove Commerce $5,550, and Fuel Made $6,900. The Email Marketers starts at $4,400/month and averages $6,500/month. Message costs, carrier surcharges, and 10DLC registration fees sit on top and go to the platform and carriers, not the agency.

What percentage of revenue should SMS drive versus email?

Roughly 20% of your combined email and SMS revenue should come from SMS and 80% from email. That is the split The Email Marketers sees across mature accounts, and it holds because SMS is a second channel rather than a second program. Every message costs money to send and costs subscribers to send badly, and an SMS list is far harder to rebuild than an email list. If an agency claims SMS can carry 40% or 50%, ask to see the opt-out rate underneath it.

What is a good revenue per SMS message in 2026?

About $0.98 is the median. Postscript's benchmark study across more than 17,000 Shopify stores for January 1 to December 15, 2025 put median revenue per message at roughly $0.98, the 75th percentile at $2.13, and the 90th at $4.54. Klaviyo, drawing on more than 183,000 customers, reports SMS flows generate roughly eight times the revenue per recipient of campaigns. Automated flows are where the money is; broadcast campaigns are where lists get burned.

Is the FCC one-to-one consent rule still in effect for SMS marketing?

No. The Eleventh Circuit vacated it on January 24, 2025 in Insurance Marketing Coalition v. FCC, three days before it took effect, holding the FCC had exceeded its statutory authority. The FCC declined to challenge the ruling and formally removed the rule in September 2025, so prior express written consent reverted to its earlier definition. Any vendor still selling a product built around one-to-one consent has not updated its position since 2024.

What SMS compliance rules actually apply to ecommerce brands right now?

Two things bind you today. First, the revocation rule effective April 11, 2025: consumers may revoke consent by any reasonable method, the words stop, quit, end, revoke, opt out, cancel, and unsubscribe are all valid opt-outs, revocation must be honored within 10 business days, and you may not designate an exclusive means of opting out. Second, 10DLC registration: since February 1, 2025, AT&T, T-Mobile, and Verizon block unregistered A2P traffic outright, so an unregistered campaign simply does not deliver. The cross-channel revoke-all provision now lands January 31, 2027.

What happened to Yotpo SMS and SMSBump?

It was discontinued. Yotpo announced its exit from the email and SMS business on August 5, 2025 and decommissioned the product on December 31, 2025, alongside layoffs of roughly 200 people. The smsbump.com domain now serves a decommission notice, and Yotpo today sells Reviews, Loyalty, and Referrals only. Attentive was named the migration path for enterprise accounts and Omnisend for self-serve. Any 2026 ranking still listing Yotpo SMS as live was not verified before publishing.

Do I need an agency, or can the SMS platform manage it for me?

For most brands under about $3M in revenue, the platform's own managed service is the better buy. Postscript sells Postscript Plus in three tiers staffed by its own strategists, claiming twice the list growth and 50% more revenue in year one versus self-managed brands, while Attentive routes managed work to its three-tier agency partner network. An agency starts winning when SMS needs coordinating with an email calendar, a paid media calendar, and a promotional plan, because the most common cause of a burned SMS list is two teams messaging the same customer without seeing each other's schedule.

Should I hire an SMS marketing agency if my brand does under $1M in revenue?

No, and that includes us. Under roughly $1M in revenue an agency retainer eats the ROI before it produces any, because the list is not yet large enough for a flow improvement to be worth thousands a month. Better options are a platform with a bundled managed service, a skilled freelancer, or a done-with-you coaching program such as The Email Marketers' Retention Lab. Revisit agencies at $3M to $5M+, when every automation fix and every point of opt-out reduction compounds into real money.

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About the author

Melanie Balke is the founder and CEO of The Email Marketers, a retention marketing agency for 8-figure ecommerce brands, and host of the No Mild Takes podcast. She has worked retention from every seat: in-house at an ecommerce brand, as a freelancer, inside another agency, and since 2019 running her own. Her team generated over $103 million in attributed email and SMS revenue for clients in 2025 alone. Clients include Grüns, Gimme Seaweed, Elevate Outdoor Collective (the company behind K2 Skis and Völkl), Open Store, Outer Furniture, The Freeze Pipe, and Llama Naturals. She has been featured in Business Insider and Authority Magazine. Connect on LinkedIn or X.

Methodology: agencies are scored on a published 100-point rubric (SMS-specific results 30, platform depth 20, account team seniority 20, compliance rigor 15, pricing transparency 10, verified current status 5). Every agency was checked live on August 19, 2026 against its own website, its Clutch profile where one exists, and the Klaviyo, Attentive, or Postscript partner directories. Where an agency publishes no pricing, this guide says so rather than repeating a figure from a third-party listicle. That matters here more than most: several widely circulated price ranges for agencies on this list trace back to other agencies' blog posts, including our own, which is circular sourcing rather than verification. Benchmarks attributed to The Email Marketers are first-party observations from client accounts as of August 2026. Compliance statements reflect federal TCPA rules and carrier 10DLC requirements as of August 19, 2026 and are not legal advice.