Klaviyo Experts (and Tools) to Boost Your Email Marketing

Most eCommerce teams don’t need another email service provider (ESP). They need to get more out of the one they already have.

If your email flows are live, campaigns are going out, and analytics are being checked, but revenue from email is flat, retention is dropping, or your list isn't growing, then the setup isn't the issue. It's the execution.

The truth is, platforms like Klaviyo give you powerful infrastructure with features like segmentation, automation, predictive logic, and deep integrations. But turning these features into profit requires strategy and technical depth most teams don’t have in-house.

That’s where Klaviyo experts can help. The right expert can build better systems, setting up smarter flows, sharper segmentation, better inboxing, and stronger attribution. 

In this guide, we’ll break down:

• When you actually need a Klaviyo expert (and when you don’t).
• What to look for when hiring one.
• Where digital marketing automation tools outperform agencies or freelancers for specific outcomes.
• How to match your needs to the right type of support.

Do you need a Klaviyo expert?

Klaviyo experts are specialists with years of experience running successful marketing campaigns using Klaviyo. They understand how the platform works from deliverability and design to segmentation, automation, and integrations. More importantly, they know how to leverage these features for specific goals.

But how do you know if you need to partner with an expert? Here are common signs that your current setup is underperforming and where a Klaviyo expert can make a measurable difference:

• You’re getting traffic, but not building a real list: If you’re pulling in thousands of site visitors every month, but your subscriber list isn’t growing at the same pace, that’s a clear signal. There’s a bigger issue around how you’re capturing, or missing, intent.
• Emails are going out, but not doing much: You're sending automated emails, maybe even using Klaviyo’s pre-built email template designs, but conversion rates stay flat. This usually signals broken logic in your segmentation, timing, or template design.
• Open rates are dropping, and you don’t know why: If your emails used to have higher open rates but have seen a significant drop and aren’t increasing, it’s often a sender reputation or deliverability issue. An email marketing expert can fix that with proper filters, domain warming, and engagement cleanup.
• You’re paying for features you’re not using: Predictive analytics, SMS marketing sync, API triggers, and zero-party data flows are core Klaviyo email marketing features. If you don’t use them and/or don’t know how to, you’re missing out on powerful capabilities.
• There’s no clear link between performance and action: You can’t fix what you can’t trace. If you don’t know why flows are underperforming, where users are dropping off, or how iOS updates are affecting attribution, you’ll keep reacting without solving.

How experts drive growth

If you're aiming to drive revenue, reduce acquisition costs, and increase retention using Klaviyo, you need to understand what an actual expert brings to the table. Here's a breakdown of the specific methods of top-performing Klaviyo experts:

Email list growth and lead capture

A Klaviyo expert doesn’t stop at a single 10% discount pop-up. They build full acquisition systems designed for marketing channel source, visitor behavior, and intent. Here’s how:

• Multi-layered signup flows: Forms that trigger based on scroll depth, exit intent, cart value, or referral source, each with distinct CTAs and incentives.
• Touchpoint capture: Embeds at checkout, quiz results, and even post-purchase referrals.
• Identity resolution: Some experts use tools like Tie to identify anonymous visitors using device-level signals, CRM matchbacks, or third-party data. These users are then added to Klaviyo with enriched attributes like name, location, and device, before they submit a form.

Automation flows and personalization

Klaviyo experts map entire customer journey lifecycles, triggered by behavior, value, and timing. Here are some examples of what they build:

• Welcome series flow based on acquisition source: Paid social media subscribers receive a different onboarding experience than referral leads. One starts with education, the other with product credibility.
• Browse abandonment: Triggered only if a visitor returns twice to the same product category, indicating intent. The email references that exact category and includes dynamic bestsellers from it.
• High-AOV abandoned cart: If the cart value exceeds $1,000, the sequence switches to a 2-step education-driven flow, not a discount-led one.
• Post-purchase flows by product type: Consumables trigger a replenishment reminder based on average usage duration, while for apparel brands, triggers are set to cross-sell and capture UGC reviews 14 days post-delivery.
• Winback logic by frequency: One-time buyers and repeat customers receive different winback incentives and copy.

Deliverability and inbox placement

Your email design and templates are ineffective if your emails aren’t reaching the inbox. This is where most eCommerce brands quietly lose revenue. 

To solve this email deliverability problem, Klaviyo experts run constant tests, fix hidden infrastructure issues, and segment with precision to protect sender reputation.

Here's what that looks like:

• Fixing broken authentication setups: SPF, DKIM, and DMARC must be correctly configured, especially after platform migrations or domain changes. If these are misaligned, even the best email automation workflows will end up in spam.
• Actively monitoring inbox placement: Use tools like MailReach or GlockApps to check where emails land (primary, promotions, or spam). This lets you adjust your email marketing strategy in real time, based on sender reputation and engagement patterns.
• Protecting domain reputation with engagement filters: High-volume sends go only to active users (e.g., those who’ve opened or clicked in the past 14–30 days). Cold subscribers are excluded to avoid damaging your sender score.
• Domain warming: Klaviyo experts often use tools that simulate real engagement across Gmail and Outlook to improve inbox placement, especially after switching platforms or domains. One approach is to build warm-up patterns that mimic human behavior and gradually improve sender reputation. For example, Twillory saw a 39% lift in open rates after implementing Tie to support domain warming and inbox monitoring.

Analytics and continuous optimization

Most marketers isolate email (and all their marketing channels) from each other. Klaviyo experts understand and leverage it as the central CRM layer that powers paid ads, SMS marketing, and customer retargeting.

Here's how advanced teams unify their marketing efforts using Klaviyo along with external tools:

• Ad audience sync across Meta and Google: Users who have viewed a product but didn’t purchase within 7 days are automatically pushed to retargeting pools, not just emailed. This keeps your email and ad strategy aligned while reinforcing the message across channels.
• Real-time ad suppression: If a customer completes a purchase, they are immediately removed from ad audiences, saving spend and preventing brand fatigue. These syncs can run via Klaviyo’s API or through tools like Tie, which push enriched profiles directly into Klaviyo.
• Cross-channel rescue flows: Within Klaviyo, abandoned cart flows can trigger SMS follow-ups if emails go unopened for 3 hours. This adds another layer to your customer journey without adding friction.
• Data-driven enrichment for better retargeting: Tie strengthens your retargeting setup by identifying anonymous visitors on your site and enriching their profiles with verified data, like location, device type, referral source, and browsing behavior. This means every workflow, email template, and audience sync you trigger inside Klaviyo is based on real, usable data.

Top 6 Klaviyo experts and tools to consider in 2025

Before hiring a Klaviyo expert agency or adding yet another app, you need clarity on the gaps you’re solving for: lead capture, deliverability, segmentation, email campaign performance, or all of the above.

Here’s a breakdown of the top Klaviyo experts and tools worth considering, depending on your priorities, internal bandwidth, and technical expertise.

1. Tie: Software for identity resolution and deliverability improvement

Best for: If you want to grow your list, fix inboxing issues, and enrich Klaviyo without hiring an expert marketing team.

Strengths: Identity resolution, domain warming, and contact enrichment

Tie, an identity resolution and email deliverability platform, integrates directly with Klaviyo and handles two major pain points most brands overlook:

• Lead capture: It identifies anonymous visitors on your site using device-level signals and third-party data. These are real users with verified emails, pushed into Klaviyo automatically, meaning that you don’t have to wait for them to fill out a form.
• Email deliverability: It manages inbox placement behind the scenes (domain warming, engagement simulation, sender reputation protection) so your campaigns land in primary, not spam or promotions.

Most brands underperform in Klaviyo because they’re feeding weak or limited data into it. Tie improves performance by making your customer data comprehensive and accurate. For example, brands using Tie have reported up to 75% higher on-site identification rates and a 30-40% increase in open rates, without changing their email creative.

2. Flowium: Full-service Klaviyo execution agency for eCommerce

Best for: If you want a team to run Klaviyo end-to-end, from email strategy to build to send.

Strengths: Klaviyo audits, lifecycle flows, campaign management

Source

Flowium works exclusively on email marketing for eCommerce businesses. Their strength is full-service execution:

• Build full flow systems (welcome, cart abandonment, winback, UGC) based on product type and purchase behavior.
• Write and design campaigns, test subject lines, and set up A/B flows.
• Handle deliverability cleanup and post-migration setup if you’re coming from Mailchimp or ActiveCampaign.

Unlike generalist agencies, Flowium goes deep into lifecycle revenue tracking. They optimize based on flow attribution, revenue per recipient, and segmentation logic, not vanity KPIs.

3. SmartMail: Platinum agency offering high-volume automation for scale

Best for: If you’re a DTC brand doing $2M+ annually and want long-term agency support with performance accountability.

Strengths: Performance-focused automation, segmentation, and paid channel integration

Source

SmartMail is a Klaviyo partner focused on scaling high-volume automations. They go beyond default flows by offering features such as:

• Replenishment flows based on SKU logic and purchase behavior
• Churn prevention flows triggered by LTV or engagement drop
• Sync high-intent segments to Meta/Google via Klaviyo’s API
• Use predictive metrics (like churn risk) to drive targeting

What stands out about SmartMail is that they operate with clear performance targets (like revenue per flow, deliverability benchmarks, segmentation-based ROI) and don’t isolate email from paid or lifecycle efforts.

Pro-tip: If you’re looking for more options, Klaviyo lists vetted agency partners within their directory, allowing you to pick an agency based on your needs and preferences.

4. Privy: Front-end email capture tool

Problem it solves: You’re not capturing enough leads onsite and you need better pop-up logic.

Strengths: Pop-up form logic, onsite targeting, real-time sync to Klaviyo

Source

If you’re getting 10,000+ site visits per month and converting less than 2% into subscribers, Privy is a quick win. It helps you set up:

• Exit-intent, scroll-based, time-based, and mobile-specific popups.
• Lead capture flows that segment users based on signup incentive (discount, content, quiz results).
• Send captured leads directly to Klaviyo segments or flows

Moreover, Privy works well with Tie. While Privy captures engaged visitors who interact with forms, Tie fills the gap by identifying high-intent users who skip form fills and gives you more leads without changing the front-end.

5. Octane AI: Zero-party data collection platform for advanced personalization

Best for: If you want to improve Klaviyo segmentation and product recommendation accuracy.

Strengths: Quizzes, surveys, intent-driven flows

Source

Octane AI lets you build quizzes that collect data directly from users, like preferences, product needs, budgets, and sync it to Klaviyo. This data can then personalize everything from email templates to retargeting flows. Here’s how it works:

• Build quizzes using Octane AI to collect customer preferences (e.g., skin type, budget, product goals).
• Feed this data into Klaviyo.
• Trigger flows on Klaviyo based on quiz responses (e.g., “Recommended bundle for oily skin” sent post-quiz).

This gives your email flows the kind of personalization that previously required manual tagging or developer input. If you're relying on guesswork or past purchase data alone, this adds a new layer of intent.

Additionally, when you integrate Tie, a customer data enrichment platform, with this workflow, you can better qualify leads and uncover deeper personalization for each of them. Tie improves every profile that is added to Klaviyo with attributes on demographics, behaviour, and intent.

6. Freelance Klaviyo specialists: One-on-one execution and support

Best for: If you need fast support for audits, setups, or fixes without an agency retainer

Strengths: Technical setup, segmentation, staff training

Freelancers are best when you have specific requirements like rebuilding an abandoned cart flow, cleaning your account after a domain change, or migrating from Mailchimp to Klaviyo.

For example, freelancers like Brynley King focus on targeted support for Shopify and Klaviyo brands, offering to:

• Audit existing flows and rebuild with improved branching logic
• Set up dynamic product recommendations and behavior-based segmentation
• Train your team on how to manage automations and campaigns in-house

You can also find vetted specialists via Upwork or MarketerHire, but make sure they’ve handled accounts at your scale and can show real results inside Klaviyo dashboards.

TL;DR

How to choose the right Klaviyo expert (or solution)

Before you hire a freelancer, partner with an email marketing agency, or add a tool like Tie to your stack, define your goals and needs. The right choice depends on your current gaps, internal bandwidth, and budget.

Here are some factors to consider that will make your decision easier:

1. Define the real problem first

Not all problems need an agency or freelancer. Some just need a system. Here’s how to think through it:

2. Match the cost to the outcome you need

Hiring people and paying for tools require different budgets and timelines. Here’s a breakdown of this for different types of partners you choose:

Freelancers

• Typical rate: $35–$95/hour.
• Often project-based or part-time monthly retainers ($475–$1,800/month).
• No long-term lock-in, but quality varies widely.

Agencies

• Monthly retainers: $1,800–$5,000+ depending on scope.
• Some require 3–6 months minimums or annual contracts.
• Best for full-service setups, including ongoing campaigns, testing, reporting, and optimization.

Automation tools

• Starts at $145–$240/month (depending on scale).
• Annual plans with discounts available.
• No human management, but covers lead capture, identity resolution, deliverability, and data syncs automatically.

Automated tools are ideal for solving targeted issues like poor inbox placement, low-quality lead capture, or missed conversions from anonymous visitors, without needing to hire full-time help.

For example, Tie not only automates lead enrichment, domain warming, and Klaviyo data syncs, but also comes with a team of experts who help implement strategies correctly from day one. So you get the benefit of hands-off automation, plus the assurance that everything’s set up with performance in mind.

Book a demo to learn how Tie works!

3. Check expertise and track record

Whatever route you choose (freelancer, agency, or automation tool), check for real results, not just credentials. Look at reviews and recommendations on Clutch, Upwork, or verified LinkedIn profiles to start with. But don’t miss out on backing up these testimonials with information around their actual performance. 

Here’s what to look for:

• Freelancers and agencies: Ask for Klaviyo account screenshots, flow-level revenue attribution, and recent campaign performance data. You want proof they've handled accounts at your scale.
• Certifications: A Klaviyo certification simply means the person has passed a basic platform test. It doesn't tell you if they’ve built high-performing flows, improved deliverability, or driven revenue. Treat it as a basic qualifier, then ask for proof of real campaign results.
• Automation platforms: Look for direct performance lifts tied to implementation. For instance, Tie helped Twillory boost deliverability by 15 points and lift open rates by 39% without changing email content.

4. Choose what fits your existing team structure

The right solution should strengthen your team, not create overlap or slow things down. Your current setup should guide the choice. For example:

• If you have a lean in-house team (designer + email marketer), a tool like Tie works well. It handles identity resolution, deliverability, and lead capture in the background, so your team can focus on campaigns, not data plumbing.
  
  
• If you need extra hands for execution (setting up flows, segmentation, A/B testing), a freelancer can easily fill the role. Just make sure you own the process and retain access.
  
  
• If you want to outsource email entirely, go with a Klaviyo agency. They’ll take over planning, writing, sending, and reporting. However, you’ll trade off day-to-day control and internal visibility.

Drive results now with your expert tool

For most eCommerce brands with a strong Klaviyo setup (built on automated flows, clean data, and solid deliverability), email should contribute 25-30% of total revenue. This benchmark is widely recognized among eCommerce operators and Klaviyo partners. If your brand is below that, there’s likely a gap in system setup, engagement strategy, or list health.

This gap shows up in your results, like low engagement, weak inboxing, and lost revenue. To effectively solve this, you have two clear options:

• Hire a Klaviyo expert to rebuild your automation strategy, fix segmentation, and improve flow performance, or,
• Plug in a tool like Tie to solve specific problems, like lead quality, inbox placement, or identity resolution, without adding headcount or overhead.

Tie identifies anonymous visitors, feeds verified emails directly into Klaviyo, and keeps your domain warmed. For most brands, this means:

• Faster list growth (GOAT Foods saw a 75% increase in lead capture within 30 days)
• Better deliverability without manual effort
• Higher campaign revenue from the same traffic and flows

Tie handles most high-impact tasks that a Klaviyo expert would, like lead enrichment, domain warming, and deliverability monitoring, without adding headcount or management overhead.

See real examples by exploring case studies from eCommerce brands that used Tie to fix inbox placement, boost open rates, and grow verified email lists without changing their creatives or flows.

You don’t need a bigger list or better creative. You just need the right setup. Book a demo to see how Tie makes your Klaviyo smarter and more powerful.

Other resources

• How to manually add an email to a segment in Klaviyo: Learn the exact workaround to manually add emails to a Klaviyo segment using profile updates, lists, and segment logic.
• Email deliverability checklist: Maximize your email marketing performance and avoid landing in spam with this email deliverability checklist.
• Advanced email marketing strategies for 2025: Pick up insights on advanced email marketing strategies from Marina Caroll, retention expert driving strategy and execution behind DTC brands like Caraway and BYLT.
• Feeding verified emails into Klaviyo: Explore how Tie helps brands generate high-quality leads from site traffic and how verified, enriched emails improve flow performance from the start.