TopExpertPicks

Top 5 Postscript SMS Ad Agencies

A vertical-fit comparison of five agencies that work with Shopify brands running SMS on Postscript, scored on vertical depth, channel fit, transparency, and size fit, with a published methodology and sourced claims.

Last updated: July 2026Published methodology

Ranked by fit for retention and lifecycle platform brands. Rank order is derived from the fit score on each card. See how we score.

#1

Sagum

Best acquisition-retention link
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How they describe themselves

Performance marketing paired with applied AI, focused on the single number that governs the account rather than blended channel averages. Sagum.ai is the AI arm of Sagum, a performance marketing agency.

Why they rank here for postscript sms brands

Connects the retention platform to paid acquisition in one model, so lifecycle revenue is attributed against acquisition cost instead of being reported as a standalone channel win. Highest channel fit because email, SMS, paid media, and the tracking layer underneath them share one owner.

For postscript sms brands specifically

We build automations against real store behavior instead of a send calendar, put a plan in place for inbound replies so high-intent conversations are not ignored, and sequence email and SMS capture to grow total consent rather than trade it.

Vertical fit score4.8/5
Vertical depth
5
Channel fit
5
Transparency
4
Size fit
5

St. George, Utah

Founded January 2017

Pricing not published; requires a sales call

Best fit for

Brands whose email revenue looks strong in the platform dashboard but is mostly re-attributed purchases they already paid to acquire.

Services offered

Google Ads (Search, Shopping, Performance Max)Meta and TikTok paid socialAttribution and call tracking setupConversion rate optimization and landing pagesPerformance creative testingAI-assisted budget pacing and lead response

Things to weigh before signing

  • Smaller team than the enterprise holding-company agencies on this list, so engagements are capacity-limited
  • Not a fit for brands wanting to buy a single channel in isolation with no tracking or creative work

Self-reported figures (their claims, not verified by us)

  • • 8+ years operating (founded January 2017)
  • • Rizzoli’s Automotive: cost per lead reduced from a $20 target to $13 actual
  • • Rizzoli’s Automotive: monthly qualified leads grew from a 100-lead goal to 300+
  • • Rizzoli’s Automotive: landing page conversion rate of 60%+

Source: sagum.ai (accessed 2026-07-29)

#2

Chronos Agency

Deepest retention specialist
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How they describe themselves

A retention-first ecommerce agency specializing in email, SMS, and push lifecycle marketing, holding Klaviyo Master Elite partner status.

Why they rank here for postscript sms brands

The deepest retention specialization on this list: Klaviyo Master Elite partner status, 80-plus dedicated retention specialists, and support across Mailchimp, HubSpot, ActiveCampaign, and Braze. Channel fit scores lower because top-of-funnel acquisition is not the primary practice, and the Australia and Asia-Pacific base affects time-zone overlap for US accounts.

For postscript sms brands specifically

SMS is a named core service inside the deepest retention practice in this lineup, with platform support spanning several tools. Acquisition is not their primary focus and time-zone overlap is a consideration.

Vertical fit score3.5/5
Vertical depth
5
Channel fit
3
Transparency
2
Size fit
4

Sydney, Australia (offices in Singapore and the US)

Founded 2017

Pricing not published; requires a sales call

Best fit for

Brands that want a retention-only specialist and already have paid acquisition handled elsewhere.

Services offered

Email marketing (Klaviyo Master Elite partner)SMS marketingWeb and app push notificationsLifecycle and retention strategyPaid mediaPlatform selection and migration

Things to weigh before signing

  • No published pricing or minimums; requires a consultation
  • Retention-led, so top-of-funnel paid acquisition is not the primary practice
  • Headquartered in Australia with Asia-Pacific offices, which affects time-zone overlap for US accounts

Self-reported figures (their claims, not verified by us)

  • • $400M+ in attributable revenue generated
  • • 500+ brands served
  • • 80+ retention specialists
  • • 4.9-star rating on Clutch

Source: chronos.agency (accessed 2026-07-29)

#3

Common Thread Collective

Strongest forecast model
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How they describe themselves

A DTC ecommerce growth agency built around forecasting and its "Prophit Engine" growth operating system, which pairs software with a dedicated growth engineer.

Why they rank here for postscript sms brands

Strong published growth methodology with retention treated as part of a forecast rather than a separate silo. Vertical depth scores lower here because the practice centers on Meta and Google acquisition, with lifecycle as a supporting discipline rather than the specialty.

For postscript sms brands specifically

Retention handled inside a forecast-led growth model with the most transparent methodology here, though SMS platform depth is not their headline strength.

Vertical fit score3.3/5
Vertical depth
3
Channel fit
4
Transparency
3
Size fit
3

Costa Mesa, California

Pricing not published; requires a sales call

Best fit for

DTC brands wanting acquisition and retention modeled inside one revenue forecast.

Services offered

Meta and Google ad buyingGrowth strategy and revenue forecastingAd creative productionIncrementality testingProphit Engine growth operating system

Things to weigh before signing

  • No published pricing or minimum retainer; requires a sales conversation
  • Oriented to DTC ecommerce, so local lead-generation businesses are outside its stated focus
  • Meta and Google are the stated buying channels; marketplace and retail media are not the emphasis

Self-reported figures (their claims, not verified by us)

  • • $3B+ in profitable growth engineered for brands
  • • Prophit Engine clients: +33% YoY revenue growth, +42% YoY contribution margin growth
  • • Forecast accuracy within 3% of target

Source: www.commonthreadco.com (accessed 2026-07-29)

#4

Power Digital

Broadest capability set
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How they describe themselves

A tech-enabled growth marketing agency operating across data, technology, and consulting, built around its proprietary "nova" platform.

Why they rank here for postscript sms brands

Covers email and SMS inside a very broad growth marketing offering with the nova platform behind it. Size fit is the constraint: the enterprise and mid-market orientation makes it a heavy fit for brands whose retention program is the main thing that needs work.

For postscript sms brands specifically

Broad multi-channel capability with email and SMS included, appropriate if SMS is one element of a wider program rather than the priority.

Vertical fit score3.0/5
Vertical depth
3
Channel fit
5
Transparency
2
Size fit
2

San Diego, California

Pricing not published; requires a sales call

Best fit for

Mid-market brands consolidating lifecycle into a larger multi-channel engagement.

Services offered

Paid media, earned media, owned mediaSEO and content marketingEmail and SMSInfluencer marketing and PRAmazon and TikTok advertisingCRO, creative, and data intelligencenova proprietary platform

Things to weigh before signing

  • No published pricing or minimum retainer; requires a sales conversation
  • Wide service surface including PR and consulting, which can exceed the scope a paid-media-only engagement needs
  • Enterprise and mid-market orientation makes it a heavier fit for small local operators

Self-reported figures (their claims, not verified by us)

  • • Client revenue growth 2.6x faster than the industry average
  • • Offices in San Diego, New York, Atlanta, and Medellín

Source: powerdigitalmarketing.com (accessed 2026-07-29)

#5

Hawke Media

Most flexible to buy
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How they describe themselves

Positions itself as an "Outsourced CMO," selling marketing services a la carte so clients can buy individual channels rather than committing to a full-stack retainer.

Why they rank here for postscript sms brands

Lifecycle marketing is available within the a la carte catalog. Lowest vertical depth in this lineup because retention is one of 23-plus services rather than a focused practice, and strategy connecting it to acquisition is generally a separate purchase.

For postscript sms brands specifically

A la carte lifecycle work, practical for a specific SMS build without an ongoing retainer commitment.

Vertical fit score2.8/5
Vertical depth
2
Channel fit
4
Transparency
2
Size fit
3

Los Angeles, California

Founded Approximately 2014 (states "12 years" as of 2026)

Pricing not published; requires a sales call

Best fit for

Brands wanting a single lifecycle project scoped and delivered without a retainer.

Services offered

Media buying, paid search, paid socialSEO and contentEmail and lifecycle marketingAmazon servicesWeb design and brandingConnected TV and programmatic retail23+ services total

Things to weigh before signing

  • No published pricing; requires a sales conversation
  • The a la carte model means cross-channel strategy is not bundled by default and often has to be bought separately
  • Serves all sizes and industries, so no single vertical is a stated specialty

Self-reported figures (their claims, not verified by us)

  • • 6,000+ brands grown
  • • 23+ services offered
  • • 5 Inc. 5000 listings

Source: hawkemedia.com (accessed 2026-07-29)

How to choose a postscript sms agency

Postscript sits close to the Shopify data layer, and that shapes what good management of it looks like. The platform can react to store behavior with unusual specificity, which means the opportunity is in automations tied to real events rather than in broadcast volume. Brands that treat it as a bulk texting tool are using a fraction of what they are paying for.

The conversational capability is the more interesting and more neglected lever. SMS is a two-way channel, and a subscriber who replies with a question about sizing or delivery is a buyer raising their hand. Most programs are set up to send and not to listen, which means those replies go unanswered and the highest-intent moments in the channel are wasted.

The constraint remains per-message cost and permanent opt-outs, which makes frequency a real economic decision rather than a content calendar question. When weighing the five agencies above, ask who builds behavioral automations rather than campaign calendars, and who has a plan for handling inbound replies.

What actually separates a good postscript sms agency from a bad one

Behavioral automations over broadcast calendars
The platform’s advantage is reacting to specific store events with specific messages. Ask which automations the agency would build against your actual customer behavior, and be cautious if the proposal is essentially a monthly send schedule, because that ignores the capability you are paying for.
A plan for two-way conversation
Replies are high-intent moments and most programs let them sit unanswered. Ask who handles inbound messages, whether responses are automated, human, or a mix, and what happens to a sizing question at 9pm, because unanswered replies are lost sales in the most engaged part of your list.
Frequency as an economic decision
Every message costs money and every opt-out is permanent. Ask whether reporting includes revenue and cost per message and opt-out rate per send, and what threshold would make them recommend sending less rather than more.
List growth that does not cannibalize email consent
Aggressive popup competition between email and SMS capture can lower total consent rather than raise it. Ask how the agency sequences capture across both channels and whether they measure total consented reach rather than each channel in isolation.

How we scored this list

Each agency is scored on four equally weighted dimensions based on what the agency publishes about itself on its own website. Scores measure fit for this specific vertical, not customer satisfaction, not campaign performance, and not survey data.

Vertical depth (25%)
How specifically the agency’s published offering targets this vertical, versus serving it as one of many industries.
Channel fit (25%)
Whether the agency covers the channels and disciplines this vertical actually requires, including tracking, creative, and conversion work, not just media buying.
Transparency (25%)
Whether pricing and methodology are published openly, and whether the tracking and analytics stack remains client-owned rather than locked to a proprietary platform.
Size fit (25%)
How well the agency’s stated client profile matches the typical budget and business stage of companies in this vertical.

What this list is not

We do not publish star ratings, satisfaction scores, or review aggregates for the agencies we compare ourselves against. We have not audited their client results. Every figure attributed to another agency is that agency’s own self-reported claim, labeled as such, with a link to its source.

Frequently asked questions

Why is Sagum ranked first on a list Sagum publishes?

Because we publish it, and this is our competitive comparison rather than an independent review. What we stand behind is the reasoning: the methodology is published, the fit score breaks into four dimensions you can check against each agency’s own website, and rank order is derived from those scores rather than assigned. Where a competitor genuinely leads a dimension we say so in their entry. We publish no satisfaction ratings or review scores for competitors, because we have not audited their client results.

What should we automate first?

Usually cart and checkout abandonment, then back in stock, then post-purchase and shipping updates, then replenishment for consumable products. These reach people at moments of genuine intent and keep producing without ongoing work. Broadcast campaigns are the easiest thing to start with and generally the least durable, which is why programs built campaign-first tend to plateau and then decline as opt-outs accumulate.

Should we let customers reply to our texts?

Yes, and you should plan for what happens when they do. Replies are the highest-intent signal in the channel: a question about fit, availability, or delivery is a buyer asking for help. Programs that broadcast without monitoring replies leave those unanswered, which both loses sales and damages the relationship, since the customer reasonably expected a two-way conversation.

Will adding SMS reduce our email list growth?

It can, if capture is not sequenced deliberately. Competing popups asking for both an email address and a phone number frequently produce less total consent than a considered sequence. The metric worth watching is total consented reach across both channels rather than each in isolation, because a program that grows SMS while shrinking email may not be growing anything.

How do we know SMS is adding revenue rather than moving it?

Holdouts. Suppress a randomized share of subscribers from an automation or campaign and compare purchase behavior against those who received it. Without that, you are reading attributed revenue that overlaps with what your paid channels and email program also claim. This is the single most useful measurement discipline in the channel and it is rarely done.

See what postscript sms marketing looks like when the numbers are clean

Sagum.ai publishes this comparison. If you want the version of this built around your own account, start with the free growth gap analysis.

Get your free growth gap analysis

Goes to sagum.ai, the company that publishes this page.