Listed AgenciesGuideNot a ranking
How to shortlist a Klaviyo or email retention agency
To shortlist a Klaviyo agency for ecommerce DTC work, open a specialty hub, read who each agency serves, keep a few rows you can explain, then visit each listing and the agency's own site. Listed Agencies is a specialty alphabetical directory (~274 agencies — sitemap unique /a/ as of 2026-09-29 PT, post Wave10 #5). Alphabetical order is not a ranking. The directory maps who publishes email, Klaviyo, and retention work; it does not choose an agency for you, collect quotes, or charge a placement fee.
Your useful result is not a long collection of names. It is a small set where you can say why each agency belongs on the list—and what you still need to confirm before you buy.
Why ranked “best Klaviyo” lists mislead
Ranked “best of” pages answer a different question than the one you have. They order agencies by a score, editorial vote, or marketplace position. Fit for your store is a different decision: what work you need owned, which stack you run, who will do the day-to-day work, and how you will see progress.
A list that puts one agency above another does not tell you whether that agency’s published specialty matches your brief. It also does not tell you whether the people who would work on your account are the same people who wrote the case studies you skimmed.
Use ranked lists—if you use them at all—as background reading. Do not treat position as proof of fit. Shortlist from specialty hubs where you can read the published facts for yourself, then decide whom to contact.
Talk vs not-talk checklist
“Talk” means there is a reason to discuss an agency engagement—not that you should sign yet. “Not talk” means another kind of help addresses the gap you have described, or that you are not ready to compare scopes.
| Question | Talk (agency-shaped) | Not talk yet |
|---|---|---|
| Scope | You can name the books of work: flows, campaigns, creative, deliverability, reporting. | You only know “we need better email” with no books of work. |
| Stack | You know the ESP / CRM you run (or will run)—often Klaviyo for DTC—and want operators who name that stack. | Stack is undecided and you want the agency to invent your tech stack first. |
| Who does the work | You need a named team or clear ownership for builds, sends, and QA. | You need a permanent in-house seat (that is a hiring decision, not this directory’s product). |
| Reporting | You can say what cadence and metrics would make the retainer useful. | You have no owner for reading reports or changing priorities. |
Before comparing proposals, finish this sentence: “The work I need to hand over is…”
“Build and own our Klaviyo flows and weekly campaigns” is talk. “Make retention better somehow” needs another pass: separate the books of work from the badge you wish a ranked list would hand you.
Use the specialty hubs
Listed Agencies groups agencies by the specialties their public sites name. For a Klaviyo / retention shortlist, start on the hubs—not on a general marketplace homepage.
Orientation counts on the specialty pages (29 Sep 2026):
| Hub | Listed | Use it when… |
|---|---|---|
| Klaviyo agencies | 48 | Your stack is Klaviyo (or you are standardizing on it) and you want operators who name that specialty. |
| Retention agencies | 36 | Your brief is retention / lifecycle outcomes, not a single-channel label. |
| Email agencies | 61 | You need email broadly and will narrow by stack or retention chip next. |
These counts orient the size of each section. They are not a ranking, a capacity census, or a claim that every row will suit your brand.
Browse alphabetically. A–Z is alphabetical order, not quality order. Claiming a listing does not move a row. The directory does not describe itself as a vetted network or Master Elite program—do not read those claims into the publisher.
Read three live agency rows
Open a few listing pages and practice the same read on each. The examples below were linked from the Klaviyo and retention hubs on September 29, 2026 PT. They are examples of how to read a row—not recommendations, not a ranked set, and not a claim that these three are the right agencies for your brand.
Flowium — Published who-they-serve: ecommerce brands buying email, SMS, and lifecycle retention marketing systems. Specialty chips include Klaviyo, lifecycle, SMS, and retention. Ask: does “lifecycle retention systems” match the books of work you named, or do you only need campaign capacity?
Retention Labs — Published who-they-serve: ecommerce and DTC brands buying email, SMS, Messenger, and automation retention programs. Specialty chips include Klaviyo, email, SMS, Messenger, automation, and retention. Ask: which channels in that list are in scope for you, and which are out?
Perennial — Published who-they-serve: DTC and ecommerce brands handing off full-service email and SMS lifecycle/retention programs. Specialty chips include Klaviyo, email, SMS, lifecycle, and retention. Ask: does “full-service handoff” match how much ownership you want to transfer, or do you need a narrower build-only scope?
On every row, separate evidence from assumption:
- Evidence: what the listing’s who-they-serve line and specialty chips actually say.
- Still to confirm: who does the work day to day, reporting cadence, what sits outside the retainer, and any dollar figures (omit invented bands; ask the agency).
Last-checked is a date, not an endorsement. Unclaimed status means the facts came from the public site; claiming does not boost the listing.
Build a shortlist of a few
Aim for a few agencies—typically two or three—where you can complete this sentence for each:
Reason to investigate: Their published specialties include [Klaviyo / retention / email], and we need [specific books of work].
Still to confirm: [The question the listing cannot answer.]
Do not pad the list to hit a quota. Do not keep a weak row because it appeared early in the alphabet.
Then visit each shortlisted /a/ listing, open the agency’s own site from the listing, and read with your brief beside you. The directory is a map. The decision happens after you understand scope, stack, who does the work, and reporting—not after you pick a badge from a ranked article.
If permanent in-house capacity is what you actually need, that is a hiring path outside Listed Agencies. This guide stays on the agency-shortlist job.
FAQ
Is there a placement fee to use Listed Agencies?
No. Listings are unpaid. The directory does not collect quotes or match you with agencies. You shortlist and contact operators yourself.
Are these agencies “vetted” or Master Elite through Listed Agencies?
Do not treat the directory as a vetted network or a Master Elite claim for Listed Agencies itself. Each unclaimed row shows facts collected from the agency’s public site. Suitability for your brief is your judgment after reading the row and the agency site.
Does alphabetical order mean some agencies are better?
No. Alphabetical order is not rank. Claim status does not change position.
Should I start on /klaviyo, /retention, or /email?
Start where your brief is clearest. Stack-first → Klaviyo. Outcome-first (lifecycle / retention) → retention. Broad email → email, then narrow by specialty chips.
Can I decide on retainer dollars from the directory?
Not from Listed Agencies rows alone. Rates are not shown on listings. Do not invent dollar bands. Ask each shortlisted agency what the fee includes and what sits outside it.
Will Listed Agencies choose a Klaviyo agency for me?
No. It is a specialty alphabetical directory. You map, shortlist, and investigate.
Start your shortlist
Open Klaviyo agencies and retention agencies → shortlist a few rows you can explain → visit each /a/ page → open each agency site with your scope, stack, ownership, and reporting questions written down.