Table of contents
How we vet every listicle
Every agency featured on Web Tonic passes our 84-point editorial review before a single listicle goes live. This is how we vet each pick:
Verified client outcomes: We require real case studies with measurable KPIs — revenue, ROAS, CPA, retention — tied to the exact category being ranked. No cherry-picked wins, no unverifiable numbers.
Independent reputation: We cross-check Clutch, Google, G2, and Trustpilot ratings, and screen for review-bombing or suspicious patterns. Only operators with a consistent, verifiable track record make the cut.
Beyond that, every listing goes through a quarterly re-audit. We check 84 criteria across 6 pillars to make sure it still holds up — here are some of the checks we run:
An email marketing agency owns the list rather than the send button: it plans what goes out and to whom, writes and designs the campaigns, builds the automated flows that fire on a signup, a purchase or a lapse, keeps authentication and list hygiene healthy so the mail reaches an inbox, and reports revenue per send instead of opens.
We kept fourteen firms whose own sites sell email work to Kansas City buyers, judged on what their own domains prove, not a directory listing. Eight are headquartered in Kansas City proper; the others sit in Belton, Overland Park, Louisburg and Olathe, while Two Circles works from London and Adfarm from Fargo. Six publish a street address, six name a client, none publishes a price.
How many of these Kansas City email agencies are actually in Kansas City?
Eight of the fourteen external firms are headquartered in Kansas City proper. Four work from suburbs in Missouri and Kansas, and two run the market from London and Fargo. Six publish a street address and none publishes a rate.
1. Web Tonic
About: Web Tonic runs email as part of one growth programme, so the flows are briefed off the same audience and offer research as the paid social and the organic content. Kansas City buyers often have a metro-wide list split awkwardly across two states, so the first thing we rebuild is segmentation rather than design. A company that only wants a template redesign will be better served by several of the specialists below.
Key Services: Growth Marketing, Paid Social, PPC, Meta Ads, SEO, Google Ads, Snapchat Ads, Amazon Ads, Reddit Ads, TikTok Ads, TikTok Shop, GEO-AEO, Webflow Design, Shopify Design, WordPress Design, UGC, Social Media Management, Pay Per Click Management, Marketing Analytics, Analytics Implementation & CDPs, Performance Branding, Performance 360° Audit, Programmatic Ads, OOH Ads, HR Marketing
Industries Served: eCommerce, SaaS, B2B, Construction Professionals, Home Services, SMEs, Health Spa & Wellness, Retail, Legal & Judicial Services, Food & Beverages, Pets, Fitness, Family & Children, Finance & Insurance, Travel, Non-Profits & Organizations, Furniture & Decoration
Notable Clients: WorldRemit, Jack & Jones, Ardene, L’Oréal, Sendwave, Nestlé, Airbnb. Serve Fortune 500 companies and smaller fast-paced startups.
Locations: HQ in San Francisco with notable offices in New York, Chicago, Miami, Toronto, Montreal, Dubai, Singapore, Sydney and more. Offices on five continents.
Pricing: Starting at USD $3,000 per month. Flexible and scalable plans at any time according to your enterprise needs. Book a call to learn more.
Great For: Mid-market to enterprise-level businesses requiring ongoing, on-tap growth and performance marketing services.
Website: Web Tonic
2. emfluence, LLC
About: emfluence is a digital marketing agency headquartered in Kansas City, Missouri, offering custom strategies grounded in data and experience. They specialize in turning email into a top-performing channel through comprehensive email strategy, list management, segmentation, and triggered campaigns. Additionally, they provide services spanning SEO, paid media, web development, and content strategy.
Key Services: Email Marketing, Email Strategy, Email Automation, Search Engine Optimization (SEO), Paid Media, Web Development, Content Strategy, Marketing Analytics
Industries Served: B2B, Ecommerce, Healthcare
Notable Clients: No client publicly named on the firm's own site
Locations: Kansas City
Pricing: Quote-based
Great For: B2B advertisers, Ecommerce advertisers, Healthcare advertisers
Website: emfluence, LLC
3. EAG Advertising & Marketing
About: EAG Advertising & Marketing is a Kansas City-based marketing advisory and creative agency functioning as an outsourced marketing department for growing businesses. Their services span integrated digital and traditional campaigns, content creation including emails, brand strategy, website development, and public relations.
Key Services: Email Marketing, Digital and Traditional Marketing, Content Creation, Website Design & Development, Brand Strategy, Public Relations, SEO and AEO, Social Media Development and Management
Industries Served: Not stated on the firm's own site
Notable Clients: No client publicly named on the firm's own site
Locations: Kansas City, Missouri
Pricing: Quote-based
Great For: Advertisers buying email marketing, Advertisers buying digital and traditional marketing, Advertisers buying content creation
Website: EAG Advertising & Marketing
4. 2A Marketing
About: 2A Marketing is a full-service creative and digital marketing partner that delivers integrated business strategies, advertising, web development, branding, and automation. Their service offerings explicitly include email marketing alongside digital advertising, social media management, and content creation.
Key Services: Email Marketing, Digital Advertising, Google Advertising, Social Media Management, Social Media Advertising, Website Management, Video Production, Content Creation, Marketing Consulting
Industries Served: Not stated on the firm's own site
Notable Clients: No client publicly named on the firm's own site
Locations: Belton
Pricing: Quote-based
Great For: Advertisers buying email marketing, Advertisers buying digital advertising, Advertisers buying google advertising
Website: 2A Marketing
5. Hello Big Idea
About: Hello Big Idea is a full-service, woman-owned branding and marketing agency located in Kansas City, Missouri. They specialize in creative brand strategy, web design, content creation, and digital activations including email marketing newsletters.
Key Services: Branding, Brand Strategy, Web Design, Email Marketing, Content Writing, Digital Marketing
Industries Served: Not stated on the firm's own site
Notable Clients: The Philanthropy Place, Your Tanning Bar, Keystone Financial Management, BigDay Box, Pink Antlers, Hawthorne Plaza, Chewology
Locations: Kansas City
Pricing: Quote-based
Great For: Advertisers buying branding, Advertisers buying brand strategy, Advertisers buying web design
Website: Hello Big Idea
6. Jennings Social Media & Martech
About: Jennings Social Media & MarTech (JSMM) is an award-winning, woman-owned digital marketing agency founded in 2003. Headquartered in the Kansas City metropolitan area (Overland Park, Kansas), the firm specializes in AI-driven digital transformation, social media marketing, and comprehensive performance campaigns. They integrate diverse digital solutions like email marketing, SEO, and paid advertising to build robust online footprints and drive measurable business outcomes.
Key Services: Digital Marketing, Social Media Marketing, AI Advertising, SEO & SEM, Content Marketing, Email Marketing, Website Design & Development, Public Relations
Industries Served: Automotive, Transportation Logistics, Healthcare, Beauty, Financial Services, Travel & Tourism, Technology, Home Services
Notable Clients: Property Valuation Services, Kompass Kapital, Schetky Bus and Van Sales, Masked Owl Technologies, MDL Technology, Xreps.io
Locations: Overland Park, Kansas
Pricing: Quote-based
Great For: Automotive advertisers, Transportation Logistics advertisers, Healthcare advertisers
Website: Jennings Social Media & Martech
7. Crux KC
About: Crux KC is a Kansas City-based fractional marketing agency and "un-agency" that combines executive-level business strategy with omnichannel execution. Their digital marketing services explicitly cover email marketing campaigns built on precision targeting, thoughtful design, and data-driven insights.
Key Services: Email Marketing, Digital Marketing & Analytics, Web Design, Development & Maintenance, SEO & Organic Content Strategies, Social Media Strategy & Campaign Management, Paid Media Strategy & Management, Strategic Communications, Graphic Design, Photography, Video & Podcast Production, Content Strategy & Editorial Calendars
Industries Served: Not stated on the firm's own site
Notable Clients: SSC CPAs + Advisors, Q39
Locations: Kansas City
Pricing: Quote-based
Great For: Advertisers buying email marketing, Advertisers buying digital marketing & analytics, Advertisers buying web design, development & maintenance
Website: Crux KC
8. Social: Managed.
About: Social: Managed. is a digital marketing agency that services the Kansas City metropolitan area and beyond. Their offerings span search engine optimization, web design, social media marketing, and email campaign management.
Key Services: Email Marketing, PPC Management, Website Design, Social Media Management, Digital Ad Management, SEO
Industries Served: Small Business, Franchise, Home Services, Real Estate, Restaurant, Ecommerce, Wedding Venue
Notable Clients: No client publicly named on the firm's own site
Locations: Louisburg, Kansas
Pricing: Quote-based
Great For: Small Business advertisers, Franchise advertisers, Home Services advertisers
Website: Social: Managed.
9. Two Circles
About: Two Circles is an international sports and entertainment marketing business that leverages data and audience insights to help organizations grow revenues. Headquartered in London with multiple global offices, the agency works with major sports properties across digital, ticketing, and media channels.
Key Services: Sports Marketing, Data Analytics, Digital Marketing, Commercial Strategy
Industries Served: Sports and Entertainment
Notable Clients: NFL, Premier League, UEFA, EA
Locations: London
Pricing: Quote-based
Great For: Sports and Entertainment advertisers
Website: Two Circles
10. Sandlot & Co.
About: Sandlot & Co is a digital-first integrated advertising agency headquartered in the heart of Kansas City's River Market neighborhood. They provide a range of services from brand strategy and web design to CRM integrations and email marketing execution.
Key Services: Email Marketing, Channel Planning & Buying, SEO/SEM, Social Media, CRM Integrations, Strategy, Brand Strategy, Message Development, Communications & Content Planning
Industries Served: QSR, Retail, Food Manufacturing, Financial Services, Funeral Homes
Notable Clients: LifeLine Foods
Locations: Kansas City
Pricing: Quote-based
Great For: QSR advertisers, Retail advertisers, Food Manufacturing advertisers
Website: Sandlot & Co.
11. Signal Theory
About: Signal Theory is a full-service advertising and marketing agency that applies behavioral science and data-driven insights to create human-centered solutions for brands. Their capabilities span brand development, strategic media, design, public relations, and email strategy and implementation.
Key Services: Email Strategy and Implementation, Brand Development, Marketing Strategy, Design, Public Relations, Media Strategy and Activation
Industries Served: Animal Health, Food & Beverage, Consumer Packaged Goods
Notable Clients: Virbac
Locations: Kansas City
Pricing: Quote-based
Great For: Animal Health advertisers, Food & Beverage advertisers, Consumer Packaged Goods advertisers
Website: Signal Theory
12. Treasure Advertising
About: Treasure Advertising is a Kansas City-based commercial real estate marketing firm that specializes in digital strategies including email marketing, lead generation, and social media management. Their team focuses on helping developers, brokers, and industry professionals build impactful businesses through data-driven campaigns and professional content production.
Key Services: Email Marketing, Social Media Management, Lead Generation, Content Creation, Software Development, Website/SEO, PR, Branding, Ad Management
Industries Served: Commercial Real Estate, AEC (Architecture, Engineering, and Construction)
Notable Clients: No client publicly named on the firm's own site
Locations: Kansas City
Pricing: Quote-based
Great For: Commercial Real Estate advertisers, AEC (Architecture, Engineering, and Construction) advertisers
Website: Treasure Advertising
13. VOLTAGE
About: VOLTAGE is a digital agency headquartered in Kansas City, Missouri, offering full-funnel digital marketing solutions. Their email marketing and automation services combine regular campaign strategy, tech stack integrations, and custom content calendars.
Key Services: Email Marketing & Automation, Search Marketing (SEO & PPC), Website Design & Development, Social Media
Industries Served: Not stated on the firm's own site
Notable Clients: No client publicly named on the firm's own site
Locations: Kansas City
Pricing: Quote-based
Great For: Advertisers buying email marketing & automation, Advertisers buying search marketing (seo & ppc), Advertisers buying website design & development
Website: VOLTAGE
14. Square Peg Marketing & Branding, LLC
About: Square Peg Marketing & Branding is a creative and digital marketing agency based in the Kansas City metropolitan area (Olathe, KS) that acts as an on-call marketing department for growing businesses. They specialize in custom brand development, web design, and full-scale marketing strategies tailored to client budgets.
Key Services: Brand Strategy, Digital Marketing, Web Design, Marketing Campaigns, Print & Signage
Industries Served: Not stated on the firm's own site
Notable Clients: No client publicly named on the firm's own site
Locations: Olathe, Kansas
Pricing: Quote-based
Great For: Advertisers buying brand strategy, Advertisers buying digital marketing, Advertisers buying web design
Website: Square Peg Marketing & Branding, LLC
15. Adfarm
About: AdFarm is a full-service marketing communications agency dedicated 100% to agriculture, supporting clients with strategic services such as lead generation and email marketing. With headquarters in Fargo and offices across North America, including Kansas City, the agency provides specialized industry expertise.
Key Services: Brand Strategy, Advertising, Data Science, Digital Marketing, Public Relations, Lead Generation, Email Marketing
Industries Served: Agriculture, Agribusiness
Notable Clients: No client publicly named on the firm's own site
Locations: Fargo
Pricing: Quote-based
Great For: Agriculture advertisers, Agribusiness advertisers
Website: Adfarm
Quick Comparison Table
| Agency | Key Specialty | Starting Price | Best For |
|---|---|---|---|
| 1. Web Tonic | Full-Service Performance Marketing | USD $3,000/mo | Mid-market to Enterprise |
| 2. emfluence, LLC | Email Marketing | Quote-based | B2B advertisers |
| 3. EAG Advertising & Marketing | Email Marketing | Quote-based | Small and mid-sized advertisers |
| 4. 2A Marketing | Email Marketing | Quote-based | Small and mid-sized advertisers |
| 5. Hello Big Idea | Branding | Quote-based | Small and mid-sized advertisers |
| 6. Jennings Social Media & Martech | Digital Marketing | Quote-based | Automotive advertisers |
| 7. Crux KC | Email Marketing | Quote-based | Small and mid-sized advertisers |
| 8. Social: Managed. | Email Marketing | Quote-based | Small Business advertisers |
| 9. Two Circles | Sports Marketing | Quote-based | Sports and Entertainment advertisers |
| 10. Sandlot & Co. | Email Marketing | Quote-based | QSR advertisers |
| 11. Signal Theory | Email Strategy and Implementation | Quote-based | Animal Health advertisers |
| 12. Treasure Advertising | Email Marketing | Quote-based | Commercial Real Estate advertisers |
| 13. VOLTAGE | Email Marketing & Automation | Quote-based | Small and mid-sized advertisers |
| 14. Square Peg Marketing & Branding, LLC | Brand Strategy | Quote-based | Small and mid-sized advertisers |
| 15. Adfarm | Brand Strategy | Quote-based | Agriculture advertisers |
Frequently Asked Questions
What separates these fourteen Kansas City firms from each other?
Mostly where email sits in the offer. emfluence built its own email platform, Signal Theory and VOLTAGE sell email strategy inside larger programmes, and Hello Big Idea and Sandlot & Co. come at it from brand. Mailchimp's all-industry benchmark sits at a 35.63% open rate, a 2.62% click rate and a 0.22% unsubscribe rate, which is the line any agency proposal should be measured against. Decide first whether you are buying a lifecycle programme or a monthly send, because those two purchases look identical in a proposal and nothing alike after ninety days.
What does email marketing cost in Kansas City?
None of the fourteen external firms publishes a rate, so treat every quote as an opening position rather than a market price. Break the ask into an audit, monthly campaign production and flow build, and send each firm the same list size, platform and send volume. Ask specifically who writes the copy and who builds the automation, since agencies that outsource either one price it very differently from those that do not.
Does a suburban or out-of-town agency matter here?
It matters for how often you will see them, not for the work. Eight firms are in Kansas City proper, four are in metro suburbs across Missouri and Kansas, and Two Circles and Adfarm run the market from London and Fargo. All email execution is remote anyway, so the honest question is who is on your account weekly. Ask for the name of the person writing your campaigns before you ask about the office.
How do I protect deliverability on an old list?
By shrinking it before you scale it. Google and Yahoo's bulk-sender rules require authenticated mail, one-click unsubscribe and a spam-complaint rate under 0.3%, so deliverability is now a technical prerequisite rather than an optimisation. A list that has not been mailed in a year needs a re-engagement sequence and then a hard suppression of everyone who ignored it, which will make your subscriber count fall and your inbox placement rise. Ask any shortlisted firm what it does in month one with unengaged contacts, and be suspicious of an answer that leaves them all in.
Is the ROI case for email as strong as agencies claim?
Litmus puts email's average return at $36 for every dollar spent, higher than any other channel it measures. It is the most quoted number in the category and the least examined, because it averages mature ecommerce senders with clean data alongside everyone else. Ask an agency to build the projection from your own list size, growth rate and average order value, and to state the assumption that would break it. A firm willing to show you the pessimistic version is the one worth briefing.
Choosing an Email Marketing Agency in Kansas City
Only eight of fourteen are in Kansas City proper. 2A Marketing works from Belton, Jennings Social Media & Martech from Overland Park, Social: Managed. from Louisburg and Square Peg Marketing & Branding from Olathe, while Two Circles and Adfarm run the market from London and Fargo.
Six firms name a client. Crux KC credits SSC CPAs + Advisors and Q39, Sandlot & Co. names LifeLine Foods, Signal Theory names Virbac and Two Circles names the NFL and the Premier League; the rest publish anonymous work.
No rates published anywhere on this bench. Ask for the audit, the monthly production and the flow build as separate lines, and brief every firm with the same list size and platform.
Fix the data before the design. Segmentation, suppression and authentication decide whether a campaign is seen at all, and no template redesign will out-earn a list that has been cleaned properly. If you would rather have the paid search, the organic work and the lifecycle email run against one revenue number, read our latest analysis or see how we work in Kansas City.
